�
■Structure and FeaturesInner Rings are heat-treated and finished by
grinding to a high degree of accuracy. In the case ofneedle roller bearings, normally, the shafts are heat-treated and finished by grinding, and used as theraceway surfaces. However, when it is impossible tomake shaft surfaces according to the specified sur-face hardness or surface roughness, inner rings areused.Inner rings include those for Shell Type Needle RollerBearings and those for general use and are availablein a variety of dimensions. When shafts move axiallyor seals are used adjacent to bearings, wide innerrings can be selected.Inner rings can also be used economically as bush-ings without requiring any additional machining.
Shapes of Inner Rings
Gentle taper relief
Small chamfer
Gentle taper relief
Small chamfer
■TypesFor Inner Rings, the types shown in Table 1 are avail-able.
Table 1.1 Inner Rings for Shell Type Needle Roller Bearings
Series Model codes of assembled bearings
Metric series
Inch series
IRT
IRB
TA…Z,TLA…ZTAM,TLAM,YT,YTLBA…Z,BHA…ZBAM,BHAM,YB,YBH
Remark For Inner Rings for Shell Type Needle Roller Bearings
with Seal, please consult .
Table 1.2 Inner Rings for General Usage
Series Model codes of assembled bearings
Metric series
Inch series
LRT
LRTZ
LRB
LRBZ…B
LRBZ
RNA 49,RNA 69RNA 48,TAF,TRRNAF,NAX,NBXRNA 49…UU,RNA 69…UUGTRBR
BR…UU
GBR,GBR…UU
H2
●Inner Rings for Shell Type Needle Roller Bearings
●Inner Rings for General Usage
H1
�
Note(1) Minimum allowable value of chamfer dimension rRemark No oil hole is provided.
Shaft dia.
mm
Mass(Ref.)
Identification number
gd F B rs min Min. Max. TA…Z
(TAM)TLA…Z(TLAM)
YTYTL
15
17
IRT 1515IRT 1516IRT 1517IRT 1519IRT 1520IRT 1525IRT 1516-1IRT 1520-1IRT 1515-2IRT 1520-2
IRT 1525-2IRT 1530-2
IRT 1716IRT 1720
IRT 1730IRT 1716-1IRT 1720-1IRT 1710-2IRT 1715-2IRT 1716-2IRT 1720-2
IRT 1725-2IRT 1730-2
9.39.9
10.511.712.315.213.616.816.421.5
2732
11.113.7
20.515.118.812.418.319.424
3036
15151515151515151515
1515
1717
17171717171717
1717
18181818181819192020
2020
2020
20212122222222
2222
15.516.517.519.520.525.516.520.515.520.5
25.530.5
16.520.5
30.516.520.510.515.516.520.5
25.530.5
0.30.30.30.30.30.30.30.30.30.3
0.30.3
17171717171717171717
1717
17.517.517.517.517.517.518181919
1919
19.519.5
19.5202021212121
2121
1919
19191919191919
1919
0.30.3
0.30.30.30.30.30.30.3
0.30.3
TA 1815Z─
TA 1817Z
TA 1819Z
TA 1820Z
TA 1825Z
TA 1916Z
TA 1920Z
TA 2015Z
TA 2020Z
TA 202820Z
TA 2025Z
TA 2030Z
─TA 2020Z
TA 202820Z
TA 2030Z
TA 2116Z
TA 2120Z
TA 2210Z
TA 2215Z
TA 223016Z
TA 2220Z
TA 223020Z
TA 2225Z
TA 2230Z
─TLA 1816Z
───────
TLA 2020Z
─TLA 2030Z
TLA 2016Z
TLA 2020Z
TLA 2030Z────
TLA 2216Z
TLA 2220Z
──
────────
YT 2015
YT 202820
YT 2025─
─YT 202820
─YT 2116
YT 2120──
YT 223016
YT 223020
──
(1)
Boundary dimensionsmm
Standard mountingdimension mm
Assembled bearings
d a
IRT
H61N=0.102kgf=0.2248lbs.1mm=0.03937inch
Shaft dia. 7-17mm
Inner Rings for Shell Type Needle Roller Bearings
Note(1) Minimum allowable value of chamfer dimension rRemark No oil hole is provided.
Shaft dia.
mm
Mass(Ref.)
Identification number
gd F B rs min Min. Max. TA…Z
(TAM)TLA…Z(TLAM)
YTYTL
7
8
10
12
15
IRT 710IRT 712IRT 715
IRT 810IRT 812IRT 815
IRT 1012IRT 1012-2IRT 1016-2IRT 1020-2IRT 1010-1IRT 1012-1IRT 1015-1IRT 1020-1IRT 1025-1
IRT 1212IRT 1216IRT 1222IRT 1212-1IRT 1216-1IRT 1220-1IRT 1222-1IRT 1215-2IRT 1220-2IRT 1225-2
IRT 1512IRT 1513
3.23.94.8
777
888
101010101010101010
12121212121212121212
1515
101010
121212
131414141515151515
15151516161616171717
1818
10.512.515.5
10.512.515.5
12.512.516.520.510.512.515.520.525.5
12.516.522.512.516.520.522.515.520.525.5
12.513.5
0.30.30.3
999
9.79.79.7
111111
12.71313131414141414
14.514.514.515151515161616
17.517.5
101010
121212121212121212
14141414141414141414
1717
0.30.30.3
0.30.30.30.30.30.30.30.30.3
0.30.30.30.30.30.30.30.30.30.3
0.30.3
5.167.5
5.27.29.6
11.97.99.4
11.715.519.3
6.18.1
118.5
11.213.915.213.61822.5
7.58.1
TA 1010Z
TA 1012Z
TA 1015Z
─TA 1212Z
TA 1215Z
──
TA 1416Z
TA 1420Z
TA 1510Z
TA 1512Z
TA 1515Z
TA 1520Z
TA 1525Z
TA 1512Z───
TA 1616Z
TA 1620Z─
TA 1715Z
TA 1720Z
TA 1725Z
─TA 1813Z
TLA 1010Z
TLA 1012Z
TLA 1015Z
TLA 1210Z
TLA 1212Z─
TLA 1312Z
TLA 1412Z
TLA 1416Z──
TLA 1512Z───
TLA 1512Z
TLA 1516Z
TLA 1522Z
TLA 1612Z
TLA 1616Z─
TLA 1622Z───
TLA 1812Z─
───
YTL 1210
YT 1212─
─────────
───────
YT 1715─
YT 1725
──
(1)
Boundary dimensionsmm
Standard mountingdimension mm
Assembled bearings
d a
INNER RINGS
H5
�
Note(1) Minimum allowable value of chamfer dimension rRemark No oil hole is provided.
Shaft dia.
mm
Mass(Ref.)
Identification number
gd F B rs min Min. Max. TA…Z
(TAM)TLA…Z(TLAM)
YTYTL
30
32
35
40
45
IRT 3020IRT 3025IRT 3030
IRT 3220IRT 3230IRT 3215-1IRT 3220-1IRT 3225-1IRT 3230-1IRT 3245-1
IRT 3515IRT 3520IRT 3525IRT 3530IRT 3540
IRT 4020IRT 4025IRT 4030IRT 4040
IRT 4512IRT 4515IRT 4520IRT 4525IRT 4530IRT 4540IRT 4545
405060
20.525.530.5
20.530.515.520.525.530.545.5
15.520.525.530.540.5
20.525.530.540.5
12.515.520.525.530.540.545.5
0.60.60.6
343434
34.534.534.5
36.536.53737373737
39.539.539.539.539.5
45.545.545.545.5
49.549.549.549.549.549.549.5
36363636363636
3939393939
44444444
49494949494949
0.60.60.60.60.60.60.6
0.60.60.60.60.6
0.60.60.60.6
0.60.60.60.60.60.60.6
42.563.539.55264.577.5
115
3546.5586991.5
52.565.578.5
104
3644.5597387.5
116131
TA 3520Z
TA 3525Z
TA 3530Z
TA 3720Z
TA 3730Z
TA 3815Z
TA 3820Z
TA 3825Z
TA 3830Z
TAW 3845Z
TA 4015Z
TA 4020Z
TA 4025Z
TA 4030Z
TA 4040Z
TA 4520Z
TA 4525Z
TA 4530Z
TA 4540Z
TA 5012Z
TA 5015Z
TA 5020Z
TA 5025Z
TA 5030Z
TA 5040Z
TAW 5045Z
TLA 3520Z──
───────
─TLA 4020Z
───
TLA 4520Z───
──
TLA 5020Z
TLA 5025Z───
───
YT 3720──────
YT 4015─
YT 4025──
YT 4520
YT 4525──
───────
(1)
Boundary dimensionsmm
Standard mountingdimension mm
Assembled bearings
d a
303030
32323232323232
3535353535
40404040
45454545454545
353535
37373838383838
4040404040
45454545
50505050505050
IRT
H81N=0.102kgf=0.2248lbs.1mm=0.03937inch
Shaft dia. 20-45mm
Inner Rings for Shell Type Needle Roller Bearings
Note(1) Minimum allowable value of chamfer dimension rRemark No oil hole is provided.
Shaft dia.
mm
Mass(Ref.)
Identification number
gd F B rs min Min. Max. TA…Z
(TAM)TLA…Z(TLAM)
YTYTL
20
22
25
28
30
IRT 2016IRT 2020
IRT 2028IRT 2010-1IRT 2015-1IRT 2020-1IRT 2025-1IRT 2026-1IRT 2030-1IRT 2038-1
IRT 2216IRT 2220IRT 2220-1IRT 2230-1
IRT 2520IRT 2530IRT 2515-1IRT 2520-1IRT 2525-1IRT 2526-1IRT 2530-1IRT 2538-1
IRT 2820IRT 2830
IRT 3012IRT 3015
17.522
30.514.3212834.53641.552.5
19.1243755.5
26.54025.53442.54450.564
29.544
24.530.5
TA 243216Z
TA 2420Z
TA 243220Z
TA 2428Z
TA 2510Z
TA 2515Z
TA 2520Z
TA 2525Z─
TA 2530Z─
TA 2616Z
TA 2620Z
TA 2820Z
TA 2830Z
TA 2920Z
TA 2930Z
TA 3015Z
TA 3020Z
TA 3025Z─
TA 3030Z─
TA 3220Z
TA 3230Z
TA 3512Z
TA 3515Z
──
───
TLA 2520Z─
TLA 2526Z─
TLAW 2538Z
──
TLA 2820Z─
───
TLA 3020Z─
TLA 3026Z─
TLAW 3038Z
──
TLA 3512Z─
YT 243216
YT 243220
YT 2428
YT 2510
YT 2515
YT 2520
YT 2525
YTL 2526──
YT 2616
YT 2620
YT 2820─
YT 2920───────
YT 3220─
──
(1)
Boundary dimensionsmm
Standard mountingdimension mm
Assembled bearings
d a
2020
2020202020202020
22222222
2525252525252525
2828
3030
2424
2425252525252525
16.520.5
28.510.515.520.525.526.530.538.5
26262828
2929303030303030
3232
3535
16.520.520.530.5
20.530.515.520.525.526.530.538.5
20.530.5
12.515.5
0.30.3
0.30.30.30.30.30.30.30.3
0.30.30.30.3
0.30.30.30.30.30.30.30.3
0.30.3
0.60.6
2222
2222222222222222
24242424
2727272727272727
3030
3434
2323
2324242424242424
25252727
2828292929292929
3131
34.534.5
INNER RINGS
H7
�
Note(1) Maximum allowable fillet corner radius of shaft Remark No oil hole is provided.
Shaft dia.
mm(inch)
Mass(Ref.)
Identificationnumber
gd F B Min. Max. Max.
BA…Z(BAM)
BHA…Z(BHAM)
YBYBH
Boundary dimensionsmm(inch)
Standard mountingdimensions mm
Assembled bearings
d a ras max
Shaft dia. 7.938-15.875mm
Inner Rings for Shell Type Needle Roller Bearings
7.938( %/16) IRB 58 BA 88Z BHA 88Z YB 88
YB 98
YB 108
YBH 108
YB 912
YB 1012
YB 108
YBH 108
YB 1012──
──
YB 1112
YB 128
YB 1210
YB 1212──
YB 138
YBH 1310
YBH 1312───
─YB 148
YB 1412
8 11.313.08 11.7 0.37.938( %/16) 12.700( !/ 2)
9.525( #/8)
11.112( &/16)
12.700( !/2)
14.288( (/16)
15.875( %/8)
IRB 68IRB 68-1
IRB 612IRB 612-1IRB 78
IRB 712IRB 714IRB 716IRB 86IRB 88IRB 812IRB 88-1IRB 810-1IRB 812-1IRB 814-1IRB 816-1
IRB 98IRB 910IRB 912IRB 914IRB 916IRB 920
IRB 106IRB 108IRB 1012
BA 98Z
BA 108Z
BA 912Z
BA 1012Z
BA 108Z
BA 1012Z
BA 1014Z
BA 1016Z
BA 116Z
BA 118Z
BA 1112Z
BA 128Z
BA 1210Z
BA 1212Z
BA 1214Z
BA 1216Z
BA 138Z
BA 1310Z
BA 1312Z
BA 1314Z
BA 1316Z
BA 1320Z
BA 146Z
BA 148Z
BA 1412Z
BHA 98Z
BHA 108Z
─BHA 1012Z
BHA 108Z
──
BHA 1016Z
────────
──
BHA 1312Z
───
──
BHA 1412Z
8.912.6
13.218.810.1
1517.419.9
8.511.216.715.819.623.527.531
17.321.5263034.543
14.518.928
12.812.8
12.812.814.4
14.414.414.4
16.916.916.916.916.916.916.916.9
191919191919
20.720.720.7
13.0813.08
19.4319.4313.08
19.4322.6025.78
9.9013.0819.4313.0816.2519.4322.6025.78
13.0816.2519.4322.6025.7832.13
9.90 13.0819.43
13.214
13.21414.8
14.814.814.8
16.916.916.917.517.517.517.517.5
19.619.619.619.619.619.6
21.221.221.2
0.30.3
0.30.30.3
0.30.30.3
0.30.30.30.60.60.60.60.6
0.60.60.60.60.60.6
0.60.60.6
9.525( #/ 8)
9.525( #/ 8)
9.525( #/ 8)
9.525( #/ 8)
11.112( &/16)
11.112( &/16)
11.112( &/16)
11.112( &/16)
12.700( !/ 2)
12.700( !/ 2)
12.700( !/ 2)
12.700( !/ 2)
12.700( !/ 2)
12.700( !/ 2)
12.700( !/ 2)
12.700( !/ 2)
14.288( (/16)
14.288( (/16)
14.288( (/16)
14.288( (/16)
14.288( (/16)
14.288( (/16)
15.875( %/ 8)
15.875( %/ 8)
15.875( %/ 8)
20.638(!#/16)
20.638(!#/16)
20.638(!#/16)
20.638(!#/16)
20.638(!#/16)
20.638(!#/16)
22.225( &/ 8)
22.225( &/ 8)
22.225( &/ 8)
14.288( (/16)
15.875( %/ 8)
14.288( (/16)
15.875( %/ 8)
15.875( %/ 8)
15.875( %/ 8)
15.875( %/ 8)
15.875( %/ 8)
17.462(!!/16)
17.462(!!/16)
17.462(!!/16)
19.050( #/ 4)
19.050( #/ 4)
19.050( #/ 4)
19.050( #/ 4)
19.050( #/ 4)
(1)
Inch Series
IRB
H101N=0.102kgf=0.2248lbs.1mm=0.03937inch
5050505050505050505050
5555555555556060606060
20.525.530.540.545.550.525.530.540.545.550.5
0.60.60.60.60.60.61.51.51.51.51.5
5454545454545858585858
54.554.554.554.554.554.55959595959
52 62 12.5 1.5 60 60.5
55555555
65656565
25.530.545.550.5
1.51.51.51.5
63636363
63.563.563.563.5
60606060
70707070
25.530.540.550.5
1.51.51.51.5
68686868
68.568.568.568.5
Shaft dia. 50-60mm
Inner Rings for Shell Type Needle Roller Bearings
Note(1) Minimum allowable value of chamfer dimension rRemark No oil hole is provided.
Shaft dia.
mm
Mass(Ref.)
Identification number
gd F B rs min Min. Max. TA…Z
(TAM)TLA…Z(TLAM)
YTYTL
50
52
55
60
IRT 5020-1IRT 5025-1IRT 5030-1IRT 5040-1IRT 5045-1IRT 5050-1IRT 5025IRT 5030IRT 5040IRT 5045IRT 5050
IRT 5212
IRT 5525IRT 5530IRT 5545IRT 5550
IRT 6025IRT 6030IRT 6040IRT 6050
658196.5
128144160169205270300335
86
185220330365
200240320395
TA 5520Z
TA 5525Z
TA 5530Z
TA 5540Z
TAW 5545Z
TAW 5550Z
TA 6025Z
TA 6030Z
TA 6040Z
TAW 6045Z
TAW 6050Z
TA 6212Z
TA 6525Z
TA 6530Z
TAW 6545Z
TAW 6550Z
TA 7025Z
TA 7030Z
TA 7040Z
TAW 7050Z
TLA 5520Z
TLA 5525Z─────────
─
───────────
─
────
────
────
────
(1)
Boundary dimensionsmm
Standard mountingdimension mm
Assembled bearings
d a
IRT
INNER RINGS
H9
�
IRB
Note(1) Maximum allowable fillet corner radius of shaft Remark No oil hole is provided.
Shaft dia.
mm(inch)
Mass(Ref.)
Identificationnumber
gd F B Min. Max. Max.
BA…Z(BAM)
BHA…Z(BHAM)
YBYBH
Boundary dimensionsmm(inch)
Standard mountingdimensions mm
Assembled bearings
d a ras max
YB 228
YB 2212─
YB 2220
─YB 2414
YB 2416
YB 2420
YB 2610─
28.575(1 !/8)
31.750(1 !/4)
34.925(1 #/8)
IRB 188IRB 1812IRB 1816IRB 1820
IRB 2010IRB 2014IRB 2016IRB 2020
IRB 2210IRB 2220
BA 228Z
BA 2212Z
BA 2216Z
BA 2220Z
BA 2410Z
BA 2414Z
BA 2416Z
BA 2420Z
BA 2610Z
BA 2620Z
─BHA 2212Z
BHA 2216Z
─
────
──
31.54762.578
436068.585.5
4793.5
33.233.233.233.2
37373737
40.240.2
13.0819.4325.7832.13
16.2522.6025.7832.13
16.2532.13
33.933.933.933.9
37.137.137.137.1
40.240.2
0.60.60.60.6
0.60.60.60.6
0.60.6
28.575(1 !/ 8)28.575(1 !/ 8)28.575(1 !/ 8)28.575(1 !/ 8)
31.750(1 !/ 4)31.750(1 !/ 4)31.750(1 !/ 4)31.750(1 !/ 4)
34.925(1 #/ 8)34.925(1 #/ 8)
41.275(1 %/ 8)41.275(1 %/ 8)
─
─YB 2816
───
36.512(1 &/16) IRB 2316 BA 2816Z ─99 42.525.78 43.2 0.636.512(1 &/16) 44.450(1 #/ 4)
38.100(1 !/2)
IRB 2412IRB 2416IRB 2424IRB 248-1IRB 2410-1
BA 2812Z
BA 2816Z
BA 2824Z
BA 308Z
BA 3010Z
──
BHA 2824Z
──
6281
1216479.5
43.343.343.344.544.5
19.4325.7838.4813.0816.25
43.443.443.445.545.5
0.60.60.611
38.100(1 !/ 2)38.100(1 !/ 2)38.100(1 !/ 2)38.100(1 !/ 2)38.100(1 !/ 2)
44.450(1 #/ 4)44.450(1 #/ 4)44.450(1 #/ 4)47.625(1 &/ 8)47.625(1 &/ 8)
34.925(1 #/ 8)34.925(1 #/ 8)34.925(1 #/ 8)34.925(1 #/ 8)
38.100(1 !/ 2)38.100(1 !/ 2)38.100(1 !/ 2)38.100(1 !/ 2)
(1)
41.275(1 %/8)
IRB 2616IRB 2628
BA 3216Z
BAW 3228Z
──
──
136235
47.547.5
25.7844.83
48.548.5
11
41.275(1 %/ 8)41.275(1 %/ 8)
50.800(2 )50.800(2 )
42.862(1 !!/16) IRB 2720 BA 3220Z
──
──146 48.532.13 49.5 0.642.862(1 !!/16) 50.800(2 )
47.625(1 &/8)
IRB 3016IRB 3024
BA 3416Z
BA 3424Z
──
──
100149
52.952.9
25.7838.48
52.952.9
0.60.6
47.625(1 &/ 8)47.625(1 &/ 8)
53.975(2 !/ 8)53.975(2 !/ 8)
57.150(2 !/4) IRB 3616 BA 4216Z
──
──183 63.525.78 64.5 157.150(2 !/ 4) 66.675(2 %/ 8)
63.500(2 !/2)
IRB 4016IRB 4020
BA 4416Z
BA 4420Z
──
──
131164
68.768.7
25.7832.13
68.868.8
0.60.6
63.500(2 !/ 2)63.500(2 !/ 2)
69.850(2 #/ 4)69.850(2 #/ 4)
H121N=0.102kgf=0.2248lbs.1mm=0.03937inch
Shaft dia. 15.875-63.500mm
Inner Rings for Shell Type Needle Roller Bearings
Note(1) Maximum allowable fillet corner radius of shaft Remark No oil hole is provided.
Shaft dia.
mm(inch)
Mass(Ref.)
Identificationnumber
gd F B Min. Max. Max.
BA…Z(BAM)
BHA…Z(BHAM)
YBYBH
Boundary dimensionsmm(inch)
Standard mountingdimensions mm
Assembled bearings
d a ras max
─YB 1416─
──
YB 168
YBH 168
YB 1612
YBH 1612─
YB 1616
YBH 1616─
YB 1616
YBH 1616
YB 188
YB 1812
YB 1816─
15.875( %/8)
17.462(!!/16)
19.050( #/4)
20.638(!#/16)
22.225( &/8)
IRB 1014IRB 1016IRB 1022
IRB 1110IRB 1116
IRB 128
IRB 1212
IRB 1214IRB 1216
IRB 1220
IRB 1316
IRB 148IRB 1412IRB 1416IRB 1420
BA 1414Z
BA 1416Z
BA 1422Z
BA 1510Z
BA 1516Z
BA 168Z
BA 1612Z
BA 1614Z
BA 1616Z
BA 1620Z
BA 1616Z
BA 188Z
BA 1812Z
BA 1816Z
BA 1820Z
─BHA 1416Z─
──
BHA 168Z
BHA 1612Z
─BHA 1616Z
─
BHA 1616Z
─BHA 1812Z
BHA 1816Z
BHA 1820Z
3337.551.5
25.540.5
22
33
38.543.5
54.5
34
2537.55062.5
20.720.720.7
22.322.3
23.9
23.9
23.923.9
23.9
24.9
27272727
22.6025.7835.30
16.2525.78
13.08
19.43
22.6025.78
32.13
25.78
13.0819.4325.7832.13
21.221.221.2
22.822.8
24.4
24.4
24.424.4
24.4
24.9
27.527.527.527.5
0.60.60.6
0.60.6
0.6
0.6
0.60.6
0.6
0.6
0.60.60.60.6
15.875( %/ 8)15.875( %/ 8)15.875( %/ 8)
17.462( !!/16)17.462( !!/16)
19.050( #/ 4)
19.050( #/ 4)
19.050( #/ 4)19.050( #/ 4)
19.050( #/ 4)
20.638( !#/16)
22.225( &/ 8)22.225( &/ 8)22.225( &/ 8)22.225( &/ 8)
25.400(1 )
28.575(1 !/ 8)28.575(1 !/ 8)28.575(1 !/ 8)28.575(1 !/ 8)
22.225( &/ 8)22.225( &/ 8)22.225( &/ 8)
23.812( !%/16)23.812( !%/16)
25.400(1 )
25.400(1 )
25.400(1 )25.400(1 )
25.400(1 )
(1)
─YB 2010
YB 2012
YB 2016────
25.400(1)
IRB 168IRB 1610IRB 1612IRB 1616IRB 1620IRB 168-1IRB 1610-1IRB 1612-1
BA 208Z
BA 2010Z
BA 2012Z
BA 2016Z
BA 2020Z
BA 218Z
BA 2110Z
BA 2112Z
───
BHA 2016Z────
28.535.542.5567036.545.554.5
3030303030303030
13.0816.2519.4325.7832.1313.0816.2519.43
30.730.730.730.730.732.132.132.1
0.60.60.60.60.60.60.60.6
25.400(1 )
25.400(1 )
25.400(1 )
25.400(1 )
25.400(1 )
25.400(1 )
25.400(1 )
25.400(1 )
31.750(1 !/ 4)31.750(1 !/ 4)31.750(1 !/ 4)31.750(1 !/ 4)31.750(1 !/ 4)33.338(1 %/16)33.338(1 %/16)33.338(1 %/16)
Inch Series
INNER RINGS
H11
�
LRT LRTZ
Note(1) Minimum allowable value of chamfer dimension rRemark No oil hole is provided.
Shaftdia.
mm
Mass(Ref.)
Identification number
gd F B rs min Min. Max.
12
14
15
17
20
LRT 121622─
LRT 141717
LRT 151916LRT 151920LRT 152012LRT 152013
─LRT 152020
─LRT 152023
─LRT 152026
LRT 172020LRT 172116LRT 172120LRT 172213
─LRT 172216LRT 172223
─LRT 172225
─LRT 172226LRT 172232
LRT 202416LRT 202420
─LRTZ 121623
─
────
LRTZ 152014─
LRTZ 152020─
LRTZ 152024─
────
LRTZ 172214──
LRTZ 172224─
LRTZ 172225──
──
14.515.5
9.5
12.5161213.514.521.521.5242528
13.514.51815.516.51926.52830303138
16.520.5
1212
14
15151515151515151515
171717171717171717171717
2020
1616
17
19192020202020202020
202121222222222222222222
2424
2223
17
162012131420.520.5232426
20.51620131416232425.525.52632
1620
0.30.3
1414
1515
RNA 6901
RNA 6901 UU
0.3 16 16.5 NAX 1725 NBX 1725
0.30.30.30.30.30.30.30.30.30.3
17171717171717171717
18181919191919191919
TAF 192716
TAF 192720
RNAF 203212
RNA 4902 RNAF 202813
RNA 4902 UU
TR 203320
GTR 203320
RNA 6902
RNA 6902 UU
RNAFW 202826
0.30.30.30.30.30.30.30.30.30.30.30.3
191919191919191919191919
19.52020212121212121212121
NAX 2030 NBX 2030
TAF 212916
TAF 212920
RNA 4903 RNAF 223013
RNA 4903 UU
RNAF 223516
RNA 6903
RNA 6903 UU
TR 223425
GTR 223425
RNAFW 223026
RNAFW 223532
0.30.3
2222
2323
TAF 243216
TAF 243220
(1)
Boundary dimensionsmm
Standard mountingdimension mm
Assembled bearings
d a
H141N=0.102kgf=0.2248lbs.1mm=0.03937inch
Note(1) Minimum allowable value of chamfer dimension rRemark No oil hole is provided.
Shaftdia.
mm
Mass(Ref.)
Identification number
gd F B rs min Min. Max.
5
6
7
8
9
10
12
LRT 5710LRT 5812LRT 5816
LRT 6810LRT 6912LRT 6916LRT 61010
LRT 7910LRT 71012LRT 71012-1LRT 71016
LRT 81011
LRT 91211LRT 91212LRT 91216
LRT 101412LRT 101413
─LRT 101416LRT 101420
LRT 121516LRT 121612LRT 121613
─LRT 121616LRT 121620
───
────
────
─
───
──
LRTZ 101414──
───
LRTZ 121614──
1.42.83.8
1.73.24.33.9
1.93.63.64.9
2.4
3.14.56
77.58.29
11.5
88.58.59.6
10.513.5
555
6666
7777
8
999
1010101010
121212121212
788
899
10
9101010
10
121212
1414141414
151616161616
101216
10121610
10121216
11
111216
1213141620
16.51213141620
0.150.20.2
6.26.66.6
6.77.77.7
RNA 495
TAF 81512
TAF 81516
0.150.20.20.3
7.27.67.68
7.78.78.79.7
RNA 496
TAF 91612
TAF 91616
RNAF 101710
0.150.20.30.2
8.28.698.6
8.79.79.79.7
RNA 497
TAF 101712
RNAF 102012
TAF 101716 NAX 1023
0.2 9.6 9.9 RNA 498
0.30.30.3
111111
11.511.511.5
RNA 499
TAF 121912 RNAF 122212
TAF 121916 NAX 1223
0.30.30.30.30.3
1212121212
1313131313
RNAF 142612
RNA 4900 RNAF 142213
RNA 4900 UU
TAF 142216
TAF 142220 RNAFW142220
0.30.30.30.30.30.3
141414141414
14.51515151515
NAX 1523 NBX 1523
RNAF 162812
RNA 4901 RNAF 162413
RNA 4901 UU
TAF 162416
TAF 162420 RNAFW162420
(1)
Boundary dimensionsmm
Standard mountingdimension mm
Assembled bearings
d a
Shaft dia. 5-20mm
Inner Rings for General Usage
INNER RINGS
H13
�
Note(1) Minimum allowable value of chamfer dimension rRemark No oil hole is provided.
Shaftdia.
mm
Mass(Ref.)
Identification number
gd F B rs min Min. Max.
25
28
30
32
─LRT 253032
LRT 283217─
LRT 283220LRT 283230
──
LRT 303516LRT 303517
─LRT 303520
LRT 303526LRT 303530LRT 303530-1
──
LRT 303532
LRT 323720LRT 323730LRT 323830
─LRT 324020
─LRT 324036
─
LRTZ 253031─
─LRTZ 283218
──
LRTZ 283230LRTZ 283231
──
LRTZ 303518─
───
LRTZ 303530LRTZ 303531
─
───
LRTZ 323830─
LRTZ 324021─
LRTZ 324037
5154
24.525.528.5434344
31.533.53538.5
525959596164
43.56377776972.5
123130
2525
282828282828
30303030
303030303030
3232323232323232
3030
323232323232
35353535
353535353535
3737383840404040
3132
1718203030.531
16171820
263030.530.53132
203030.530.520213637
0.30.3
2727
2929
RNA 6905 UU
RNAFW 304232
0.30.30.30.30.30.3
303030303030
313131313131
RNA 49/28
RNA 49/28 UU
TAF 324220
RNA 69/28 TAF 324230
GTR 324530
RNA 69/28 UU
0.30.30.30.3
0.30.30.30.30.30.3
32323232
323232323232
34343434
343434343434
RNAF 354716
RNA 4906 RNAF 354517
RNA 4906 UU
TAF 354520 NAX 3530
NBX 3530
RNAFW 354526
RNA 6906 TAF 354530
TR 354830
GTR 354830
RNA 6906 UU
RNAFW 354732
0.30.30.60.60.60.60.60.6
3434363636363636
3636373739393939
TAF 374720
TAF 374730
TR 385230
GTR 385230
RNA 49/32
RNA 49/32 UU
RNA 69/32
RNA 69/32 UU
(1)
Boundary dimensionsmm
Standard mountingdimension mm
Assembled bearings
d a
LRT LRTZ
H161N=0.102kgf=0.2248lbs.1mm=0.03937inch
Note(1) Minimum allowable value of chamfer dimension rRemark No oil hole is provided.
Shaftdia.
mm
Mass(Ref.)
Identification number
gd F B rs min Min. Max.
20
22
25
LRT 202516LRT 202517
─LRT 202520
─LRT 202525
─LRT 202526LRT 202530
─LRT 202532
LRT 222616LRT 222620LRT 222817
─LRT 222830
─
LRT 252920LRT 252930LRT 253016LRT 253017
─LRT 253020LRT 253025
─LRT 253026LRT 253030
──
LRTZ 202518─
LRTZ 202520─
LRTZ 202525──
LRTZ 202531─
───
LRTZ 222818─
LRTZ 222831
────
LRTZ 253018──
LRTZ 253025──
22232428
2835353640.541.544
17.52430.5325555
25382828.529.534424244.549
20202020
20202020202020
222222222222
25252525252525252525
25252525
25252525252525
262628282828
29293030303030303030
16171820.5
20.525.525.526303132
162017183031
203016171820.525.525.52630
0.30.30.30.3
0.30.30.30.30.30.30.3
22222222
22222222222222
24242424
24242424242424
RNAF 253716
RNA 4904 RNAF 253517
RNA 4904 UU
TR 253820 NAX 2530
NBX 2530
GTR 253820
TR 253825
GTR 253825
RNAFW 253526
RNA 6904
RNA 6904 UU
RNAFW 253732
0.30.30.30.30.30.3
242424242424
252527272727
TAF 263416
TAF 263420
RNA 49/22
RNA 49/22 UU
RNA 69/22
RNA 69/22 UU
0.30.30.30.30.30.30.30.30.30.3
27272727272727272727
28282929292929292929
TAF 293820
TAF 293830
RNAF 304216
RNA 4905 RNAF 304017
RNA 4905 UU
NAX 3030 NBX 3030
TR 304425
GTR 304425
RNAFW 304026
RNA 6905
(1)
Boundary dimensionsmm
Standard mountingdimension mm
Assembled bearings
d a
Inner Rings for General Usage
Shaft dia. 20-32mm
INNER RINGS
H15
�
Note(1) Minimum allowable value of chamfer dimension rRemark No oil hole is provided.
Shaftdia.
mm
Mass(Ref.)
Identification number
gd F B rs min Min. Max.
42
45
50
LRT 424720LRT 424730LRT 424830
─
LRT 455020LRT 455025
LRT 455030─
LRT 455035LRT 455040LRT 455222
─LRT 455240
─LRT 455520LRT 455540
LRT 505520LRT 505525LRT 505535LRT 505540LRT 505822
─LRT 505840
─LRT 505845
─LRT 506020
───
LRTZ 424830
──
─LRTZ 455030
───
LRTZ 455223─
LRTZ 455241──
─────
LRTZ 505823─
LRTZ 505841─
LRTZ 505845─
5481
100100
5871
909095
1158893
165170120245
6377
110130116118210215235235135
42424242
4545
45454545454545454545
5050505050505050505050
47474848
5050
50505050525252525555
5555555558585858585860
203030.530.5
2025
30.530.53540222340412040
202535402223404145.545.520
0.30.30.60.6
44444646
46464747
TAF 475720
TAF 475730
TR 486230
GTR 486230
0.30.3
0.60.60.30.30.60.60.60.611
4747
49494747494949495050
4949
49.549.54949515151515454
RNAF 506220
TAF 506225 NAX 5035
NBX 5035
TR 506430
GTR 506430
TAF 506235
RNAFW 506240
RNA 4909
RNA 4909 UU
RNA 6909
RNA 6909 UU
RNAF 557220
RNAFW 557240
0.30.30.30.30.60.60.60.6111
5252525254545454555555
5454545457575757575759
RNAF 556820
TAF 556825
TAF 556835
RNAFW 556840
RNA 4910
RNA 4910 UU
RNA 6910
RNA 6910 UU
TR 587745
GTR 587745
RNAF 607820
(1)
Boundary dimensionsmm
Standard mountingdimension mm
Assembled bearings
d a
LRT LRTZ
H181N=0.102kgf=0.2248lbs.1mm=0.03937inch
Note(1) Minimum allowable value of chamfer dimension rRemark No oil hole is provided.
Shaftdia.
mm
Mass(Ref.)
Identification number
gd F B rs min Min. Max.
35
38
40
LRT 354017LRT 354020
─LRT 354030LRT 354034LRT 354040LRT 354220
─LRT 354230
─LRT 354236
─
LRT 384320LRT 384330
LRT 404517LRT 404520
LRT 404530LRT 404530-1
─LRT 404534LRT 404540LRT 404822
─LRT 404840
─
──
LRTZ 354020────
LRTZ 354221─
LRTZ 354230─
LRTZ 354237
──
──
──
LRTZ 404530───
LRTZ 404823─
LRTZ 404841
3946
46677895656797
100120120
47.572
44.551
77777788
1059395
165170
3535
35353535353535353535
3838
4040
404040404040404040
4040
40404040424242424242
4343
4545
454545454548484848
1720
20.5303440202130.530.53637
2030
1720
3030.530.5344022234041
0.30.3
0.60.30.30.30.60.60.60.60.60.6
3737
39373737393939393939
3939
39.5393939414141414141
RNAF 405017
TAF 405020 RNAF 405520
NAX 4032 NBX 4032
GTR 405520
TAF 405030
RNAFW 405034
RNAFW 405540
RNA 4907
RNA 4907 UU
TR 425630
GTR 425630
RNA 6907
RNA 6907 UU
0.30.3
4040
4242
TAF 435320
TAF 435330
0.30.3
0.30.60.60.30.30.60.60.60.6
4242
424444424244444444
4444
4444.544.5444447474747
RNAF 455517
TAF 455520 RNAF 456220
NAX 4532 NBX 4532
TAF 455530
TR 455930
GTR 455930
RNAFW 455534
RNAFW 456240
RNA 4908
RNA 4908 UU
RNA 6908
RNA 6908 UU
(1)
Boundary dimensionsmm
Standard mountingdimension mm
Assembled bearings
d a
Shaft dia. 35-50mm
Inner Rings for General Usage
INNER RINGS
H17
�
Note(1) Minimum allowable value of chamfer dimension rRemark No oil hole is provided.
Shaftdia.
mm
Mass(Ref.)
Identification number
gd F B rs min Min. Max.
65
70
75
80
LRT 657530LRT 657560
LRT 708025LRT 708030LRT 708030-1
─LRT 708035LRT 708054
─LRT 708060
LRT 758345─
LRT 758525LRT 758530LRT 758530-1
─LRT 758535LRT 758554
─
LRT 809025LRT 809030LRT 809030-1
─LRT 809035LRT 809054
─
──
───
LRTZ 708031──
LRTZ 708055─
─LRTZ 758345
───
LRTZ 758531──
LRTZ 758555
───
LRTZ 809031──
LRTZ 809055
260520
225275275275310490500560
350350240290290300335520530
255310310315355550560
6565
7070707070707070
757575757575757575
80808080808080
7575
8080808080808080
838385858585858585
90909090909090
3060
2530303135545560
45.545.525303031355455
25303031355455
1.51.5
7373
73.573.5
RNAF 759530
RNAFW 759560
111.511111.5
7575787575757578
787878.57878787878.5
TAF 809525
RNA 4914
RNAF 8010030
RNA 4914 UU
TAF 809535
RNA 6914
RNA 6914 UU
RNAFW 8010060
11111.51111
111.51111
808080808380808080
85858885858585
8181838383.583838383
888888.588888888
TR 8310845
GTR 8310845
TAF 8510525
RNA 4915
RNAF 8510530
RNA 4915 UU
TAF 8510535
RNA 6915
RNA 6915 UU
TAF 9011025
RNA 4916
RNAF 9011030
RNA 4916 UU
TAF 9011035
RNA 6916
RNA 6916 UU
(1)
Boundary dimensionsmm
Standard mountingdimension mm
Assembled bearings
d a
LRT LRTZ
H201N=0.102kgf=0.2248lbs.1mm=0.03937inch
Note(1) Minimum allowable value of chamfer dimension rRemark No oil hole is provided.
Shaftdia.
mm
Mass(Ref.)
Identification number
gd F B rs min Min. Max.
50
55
60
65
LRT 506025LRT 506040
LRT 556025LRT 556035LRT 556238
─LRT 556325
─LRT 556345
─LRT 556530LRT 556560
LRT 606825LRT 606825-1
─LRT 606835LRT 606845
─LRT 607025LRT 607030LRT 607045
─LRT 607060
LRT 657225─
LRT 657245─
LRT 657335
──
───
LRTZ 556238─
LRTZ 556326─
LRTZ 556346──
──
LRTZ 606826──
LRTZ 606846───
LRTZ 607045─
─LRTZ 657226
─LRTZ 657246
─
165265
88120190190145150255260220435
150150160210275280195240355360480
145150255265235
5050
55555555555555555555
6060606060606060606060
6565656565
6060
60606262636363636565
6868686868687070707070
7272727273
25.540
253538.538.5252645463060
25252635454625.53045.545.560
2526454635
11
5555
NAX 6040 NBX 6040
RNAFW 607840
0.30.31111111.51.5
57576060606060606363
TAF 607225
TAF 607235
TR 628138
GTR 628138
RNA 4911
RNA 4911 UU
RNA 6911
RNA 6911 UU
RNAF 658530
RNAFW 658560
0.6110.61111.5111.5
11111
6465656465656568656568
7070707070
5959
595960.560.56161616163.563.5
6666666666666868.5686868.5
70.570.570.570.571
TAF 688225
RNA 4912
RNA 4912 UU
TAF 688235
RNA 6912
RNA 6912 UU
NAX 7040
RNAF 709030
TR 708945
GTR 708945
RNAFW 709060
RNA 4913
RNA 4913 UU
RNA 6913
RNA 6913 UU
TAF 739035
(1)
Boundary dimensionsmm
Standard mountingdimension mm
Assembled bearings
d a
Shaft dia. 50-80mm
Inner Rings for General Usage
INNER RINGS
H19
�
Note(1) Minimum allowable value of chamfer dimension rRemark No oil hole is provided.
Shaftdia.
mm
Mass(Ref.)
Identification number
gd F B rs min Min. Max.
100
105
110
120
125
LRT 10011030LRT 10011040LRT 10011050
─LRT 10011540
─
LRT 10511550─
LRT 11012030LRT 11012540
─
LRT 12013030LRT 12013545
─
LRT 12514060─
───
LRTZ 10011050─
LRTZ 10011541
─LRTZ 10511550
──
LRTZ 11012541
──
LRTZ 12013546
─LRTZ 12514060
380500640640770780
670670
410840870
4501 0301 050
1 4601 460
100100100100100100
105105
110110110
120120120
125125
110110110110115115
115115
120125125
130135135
140140
304050.550.54041
50.550.5
304041
304546
60.560.5
111.51.51.11.1
105105108108106.5106.5
108108108.5108.5113113
TAF 11013030
TAF 11013040
TR 11013550
GTR 11013550
RNA 4920
RNA 4920 UU
1.51.5
113113
113.5113.5
TR 11515350
GTR 11515350
11.11.1
11.11.1
1.51.5
115116.5116.5
125126.5126.5
133133
118123123
128133133
138138
RNA 4822
RNA 4922
RNA 4922 UU
RNA 4824
RNA 4924
RNA 4924 UU
TR 14017860
GTR 14017860
130
135
LRT 13014535LRT 13015050
─
LRT 13515060─
──
LRTZ 13015051
─LRTZ 13515060
8601 6701 720
1 5601 560
130130130
135135
145150150
150150
355051
60.560.5
1.11.51.5
1.51.5
136.5138138
143143
143148148
148148
RNA 4826
RNA 4926
RNA 4926 UU
TR 15018860
GTR 15018860
140LRT 14015535LRT 14016050
─
──
LRTZ 14016051
9301 7901 830
140140140
155160160
355051
1.11.51.5
146.5148148
153158158
RNA 4828
RNA 4928
RNA 4928 UU
(1)
Boundary dimensionsmm
Standard mountingdimension mm
Assembled bearings
d a
LRT LRTZ
H221N=0.102kgf=0.2248lbs.1mm=0.03937inch
Note(1) Minimum allowable value of chamfer dimension rRemark No oil hole is provided.
Shaftdia.
mm
Mass(Ref.)
Identification number
gd F B rs min Min. Max.
85
90
95
LRT 859350─
LRT 859526LRT 859530LRT 859536LRT 859545
─LRT 8510035
─LRT 8510063
─
LRT 9010026LRT 9010030LRT 9010036LRT 9010050
─LRT 9010535
─LRT 9010563
─
LRT 9510526LRT 9510536LRT 9511035
─LRT 9511063
─
─LRTZ 859350
────
LRTZ 859545─
LRTZ 8510036─
LRTZ 8510064
────
LRTZ 9010050─
LRTZ 9010536─
LRTZ 9010564
───
LRTZ 9511036─
LRTZ 9511064
440440280330390490490575605
1 0401 060
295355415580580610630
1 1001 120
315430650660
1 1601 180
8585858585858585858585
909090909090909090
959595959595
93939595959595
100100100100
100100100100100105105105105
105105110110110110
50.550.526303645.545.535366364
26303650.550.535366364
263635366364
1111.511.51.51.11.11.11.1
9090909390939391.591.591.591.5
91919393.59393.593.598989898
TR 9311850
GTR 9311850
TAF 9511526
RNAF 9511530
TAF 9511536
TR 9512045
GTR 9512045
RNA 4917
RNA 4917 UU
RNA 6917
RNA 6917 UU
11.511.51.51.11.11.11.1
959895989896.596.596.596.5
9898.59898.598.5
103103103103
TAF 10012026
RNAF 10012030
TAF 10012036
TR 10012550
GTR 10012550
RNA 4918
RNA 4918 UU
RNA 6918
RNA 6918 UU
111.11.11.11.1
100100101.5101.5101.5101.5
103103108108108108
TAF 10512526
TAF 10512536
RNA 4919
RNA 4919 UU
RNA 6919
RNA 6919 UU
(1)
Boundary dimensionsmm
Standard mountingdimension mm
Assembled bearings
d a
Shaft dia. 85-140mm
Inner Rings for General Usage
INNER RINGS
H21
�
Note(1) Minimum allowable value of chamfer dimension rRemark No oil hole is provided.
Shaftdia.
mm
Mass(Ref.)
Identification number
gd F B rs min Min. Max.
340
360
380
400
420
440
LRT 34037080LRT 340380118
LRT 36039080LRT 360400118
LRT 380415100LRT 380430140
LRT 400450140
LRT 420470140
──
──
──
─
─
10 20020 300
10 80021 500
16 70033 900
35 600
37 300
340340
360360
380380
400
420
370380
390400
415430
450
470
80118
80118
100140
140
140
2.13
351353
367377
RNA 4868
RNA 4968
2.13
371373
387397
RNA 4872
RNA 4972
2.14
4
4
391396
416
436
412427
447
467
RNA 4876
RNA 4976
RNA 4980
RNA 4984
LRT 440490160 ─ 44 100 440 490 160 4 456 487 RNA 4988
(1)
Boundary dimensionsmm
Standard mountingdimension mm
Assembled bearings
d a
LRT
H241N=0.102kgf=0.2248lbs.1mm=0.03937inch
Shaft dia. 150-440mm
Inner Rings for General Usage
Note(1) Minimum allowable value of chamfer dimension rRemark No oil hole is provided.
Shaftdia.
mm
Mass(Ref.)
Identification number
gd F B rs min Min. Max.
150
160
170
180
190
LRT 15016540LRT 15017060
LRT 16017540LRT 16018060
LRT 17018545LRT 17019060
LRT 18019545LRT 18020569
LRT 19021050LRT 19021569
──
──
──
──
──
1 1302 290
1 2002 440
1 4202 580
1 5003 950
2 3804 200
150150
160160
170170
180180
190190
165170
175180
185190
195205
210215
4060
4060
4560
4569
5069
1.12
156.5159
163168
RNA 4830
RNA 4930
1.12
166.5169
173178
RNA 4832
RNA 4932
1.12
1.12
1.52
176.5179
186.5189
198199
183188
193203
208213
RNA 4834
RNA 4934
RNA 4836
RNA 4936
RNA 4838
RNA 4938
200
220
LRT 20022050LRT 20022580
LRT 22024050LRT 22024580
──
──
2 5205 000
2 7505 500
200200
220220
220225
240245
5080
5080
1.52.1
1.52.1
208211
228231
218223
238243
RNA 4840
RNA 4940
RNA 4844
RNA 4944
240
260
280
300
320
LRT 24026560LRT 24026580
LRT 26028560LRT 260290100
LRT 28030569LRT 280310100
LRT 30033080LRT 300340118
LRT 32035080LRT 320360118
──
──
──
──
──
4 5306 000
4 9309 900
6 05010 600
9 10018 000
9 60019 200
240240
260260
280280
300300
320320
265265
285290
305310
330340
350360
6080
60100
69100
80118
80118
22.1
22.1
22.1
2.13
2.13
249251
269271
289291
311313
331333
262262
282287
302307
327337
347357
RNA 4848
RNA 4948
RNA 4852
RNA 4952
RNA 4856
RNA 4956
RNA 4860
RNA 4960
RNA 4864
RNA 4964
(1)
Boundary dimensionsmm
Standard mountingdimension mm
Assembled bearings
d a
INNER RINGS
H23
�
Assembled bearings
BR 101812
GBR 101812
GBR 101816UU
BR 101816UU
BR 122012
BR 122016
GBR 122012
GBR 122016UU
BR 122016UU
BR 142212
BR 142216
GBR 142212
GBR 142216 GBR 142216UU
BR 142216UU
BR 162412
BR 162416
GBR 162412
GBR 162416 GBR 162416UU
BR 162416UU
BR 182616
BR 182620
GBR 182616
GBR 182620UU
BR 182620UU
LRBZ LRBZ…B
H261N=0.102kgf=0.2248lbs.1mm=0.03937inch
Inner Rings for General Usage
Note(1) Maximum allowable fillet corner radius of shaft Remark LRBZ has no oil hole. LRB and LRBZ…B are provided with an oil groove and an oil hole.
Shaft dia.
mm(inch)
Mass(Ref.)
Identification number
gd F B Min. Max. Max.
9.525( #/8)
LRB 61012───
─LRBZ 61012LRBZ 61016LRBZ 61016 B
12.700( !/2)
LRB 81212LRB 81216
───
──
LRBZ 81212LRBZ 81216LRBZ 81216 B
15.875( %/8)
LRB 101412LRB 101416
───
──
LRBZ 101412LRBZ 101416LRBZ 101416 B
19.050( #/4)
LRB 121612LRB 121616
───
──
LRBZ 121612LRBZ 121616LRBZ 121616 B
22.225( &/8)
LRB 141816LRB 141820
───
──
LRBZ 141816LRBZ 141820LRBZ 141820 B
(1)
Boundary dimensionsmm(inch)
Standard mountingdimensions mm
d a ras max
18.518.52525
19.30019.30025.65025.650
14141414
17.517.517.517.517.5
2121212121
2424242424
2727272727
14.514.514.514.5
0.60.60.60.6
110.60.60.6
110.60.60.6
110.60.60.6
110.60.60.6
1818181818
21.221.221.221.221.2
24.424.424.424.424.4
27.527.527.527.527.5
19.30025.65019.30025.65025.650
19 30025.65019.30025.65025.650
19.30025.65019.30025.65025.650
25.65032.00025.65032.00032.000
9.525( #/ 8)
9.525( #/ 8)
9.525( #/ 8)
9.525( #/ 8)
12.700( !/ 2)
12.700( !/ 2)
12.700( !/ 2)
12.700( !/ 2)
12.700( !/ 2)
15.875( %/ 8)
15.875( %/ 8)
15.875( %/ 8)
15.875( %/ 8)
15.875( %/ 8)
19.050( #/ 4)
19.050( #/ 4)
19.050( #/ 4)
19.050( #/ 4)
19.050( #/ 4)
22.225( &/ 8)
22.225( &/ 8)
22.225( &/ 8)
22.225( &/ 8)
22.225( &/ 8)
15.875( %/ 8)
15.875( %/ 8)
15.875( %/ 8)
15.875( %/ 8)
19.050( #/ 4)
19.050( #/ 4)
19.050( #/ 4)
19.050( #/ 4)
19.050( #/ 4)
22.225( &/ 8)
22.225( &/ 8)
22.225( &/ 8)
22.225( &/ 8)
22.225( &/ 8)
25.400(1 )
25.400(1 )
25.400(1 )
25.400(1 )
25.400(1 )
28.575(1 !/ 8)
28.575(1 !/ 8)
28.575(1 !/ 8)
28.575(1 !/ 8)
28.575(1 !/ 8)
23.53123.53131
2837.52837.537.5
3344334444
5062506262
Shaft dia. 9.525-22.225mm
LRB
INNER RINGS
Inch Series
H25
�
Assembled bearings
BR 223016
BR 223020
GBR 223016
GBR 223020UU
BR 223020UU
BR 243316
BR 243320
GBR 243316
GBR 243320 GBR 243320UU
BR 243320UU
BR 263516
BR 263520
GBR 263516
GBR 263520 GBR 263520UU
BR 263520UU
BR 283716
BR 283720 BR 283820
BR 303920
GBR 283720 GBR 283820 GBR 283720UU
BR 283720UU
GBR 303920 GBR 303920UU
BR 303920UU
BR 202816
BR 202820
GBR 202816
GBR 202820UU
BR 202820UU
LRBZ LRBZ…B
H281N=0.102kgf=0.2248lbs.1mm=0.03937inch
Note(1) Maximum allowable fillet corner radius of shaft Remark LRBZ has no oil hole. LRB and LRBZ…B are provided with an oil groove and an oil hole.
Shaft dia.
mm(inch)
Mass(Ref.)
Identification number
gd F B Min. Max. Max.
28.575(1 !/8)
LRB 182216LRB 182220
───
──
LRBZ 182216LRBZ 182220LRBZ 182220 B
31.750(1 !/4)
LRB 202416LRB 202420
───
──
LRBZ 202416LRBZ 202420LRBZ 202420 B
34.925(1 #/8)
LRB 222616LRB 222620
───
──
LRBZ 222616LRBZ 222620LRBZ 222620 B
38.100(1 !/2)
LRB 242816LRB 242820LRB 243020
────
───
LRBZ 242820LRBZ 242820 BLRBZ 243020LRBZ 243020 B
(1)
Boundary dimensionsmm(inch)
Standard mountingdimensions mm
d a ras max
6377637777
25.65032.00025.65032.00032.000
33.533.533.533.533.5
3737373737
40.240.240.240.240.2
43.343.343.343.343.343.343.3
33.933.933.933.933.9
110.60.60.6
1.51.50.60.60.6
1.51.50.60.60.6
1.51.51.50.60.611
37.137.137.137.137.1
40.240.240.240.240.2
43.443.44543.443.44545
25.65032.00025.65032.00032.000
25.65032.00025.65032.00032.000
25.65032.00032.00032.00032.00032.00032.000
28.575(1 !/ 8)
28.575(1 !/ 8)
28.575(1 !/ 8)
28.575(1 !/ 8)
28.575(1 !/ 8)
31.750(1 !/ 4)
31.750(1 !/ 4)
31.750(1 !/ 4)
31.750(1 !/ 4)
31.750(1 !/ 4)
34.925(1 #/ 8)
34.925(1 #/ 8)
34.925(1 #/ 8)
34.925(1 #/ 8)
34.925(1 #/ 8)
38.100(1 !/ 2)
38.100(1 !/ 2)
38.100(1 !/ 2)
38.100(1 !/ 2)
38.100(1 !/ 2)
38.100(1 !/ 2)
38.100(1 !/ 2)
34.925(1 #/ 8)
34.925(1 #/ 8)
34.925(1 #/ 8)
34.925(1 #/ 8)
34.925(1 #/ 8)
38.100(1 !/ 2)
38.100(1 !/ 2)
38.100(1 !/ 2)
38.100(1 !/ 2)
38.100(1 !/ 2)
41.275(1 %/ 8)
41.275(1 %/ 8)
41.275(1 %/ 8)
41.275(1 %/ 8)
41.275(1 %/ 8)
44.450(1 #/ 4)
44.450(1 #/ 4)
47.625(1 &/ 8)
44.450(1 #/ 4)
44.450(1 #/ 4)
47.625(1 &/ 8)
47.625(1 &/ 8)
7186718686
7796779696
80100155100100160160
Shaft dia. 25.400-38.100mm
25.400(1)
LRB 162016LRB 162020
───
──
LRBZ 162016LRBZ 162020LRBZ 162020 B
30.530.530.530.530.5
110.60.60.6
30.730.730.730.730.7
25.65032.00025.65032.00032.000
25.400(1 )
25.400(1 )
25.400(1 )
25.400(1 )
25.400(1 )
31.750(1 !/ 4)
31.750(1 !/ 4)
31.750(1 !/ 4)
31.750(1 !/ 4)
31.750(1 !/ 4)
5672567272
INNER RINGS
LRB
Inner Rings for General Usage Inch Series
H27
�
Assembled bearings
BR 405224
BR 405228
GBR 405224
GBR 405228 GBR 405228UU
BR 405228UU
BR 445624
BR 445628
GBR 445624
GBR 445628 GBR 445628UU
BR 445628UU
BR 486024
BR 486028
GBR 486024
GBR 486028 GBR 486028UU
BR 486028UU
BR 324116
BR 324120
GBR 324116
GBR 324120 GBR 324120UU
BR 324120UU
BR 364824
BR 364828
GBR 364824
GBR 364828 GBR 364828UU
BR 364828UU
LRBZ LRBZ…B
H301N=0.102kgf=0.2248lbs.1mm=0.03937inch
Note(1) Maximum allowable fillet corner radius of shaft Remark LRBZ has no oil hole. LRB and LRBZ…B are provided with an oil groove and an oil hole.
Shaft dia.
mm(inch)
Mass(Ref.)
Identification number
g d F B Min. Max. Max.
50.800(2)
LRB 324024LRB 324028
───
──
LRBZ 324024LRBZ 324028LRBZ 324028 B
57.150(2 !/4)
LRB 364424LRB 364428
───
──
LRBZ 364424LRBZ 364428LRBZ 364428 B
63.500(2 !/2)
LRB 404824LRB 404828
───
──
LRBZ 404824LRBZ 404828LRBZ 404828 B
(1)
Boundary dimensionsmm(inch)
Standard mountingdimensions mm
d a ras max
335390335390390
38.35044.70038.35044.70044.700
5858585858
6565656565
7171717171
6161616161
221.51.51.5
221.51.51.5
221.51.51.5
6767676767
7373737373
38.35044.70038.35044.70044.700
38.35044.70038.35044.70044.700
50.800(2 )
50.800(2 )
50.800(2 )
50.800(2 )
50.800(2 )
57.150(2 !/ 4)
57.150(2 !/ 4)
57.150(2 !/ 4)
57.150(2 !/ 4)
57.150(2 !/ 4)
63.500(2 !// 2)
63.500(2 !/ 2)
63.500(2 !// 2)
63.500(2 !/ 2)
63.500(2 !/ 2)
63.500(2 !/ 2)
63.500(2 !/ 2)
63.500(2 !/ 2)
63.500(2 !/ 2)
63.500(2 !/ 2)
69.850(2 #/ 4)
69.850(2 #/ 4)
69.850(2 #/ 4)
69.850(2 #/ 4)
69.850(2 #/ 4)
76.200(3 )
76.200(3 )
76.200(3 )
76.200(3 )
76.200(3 )
375440375440440
410480410480480
Shaft dia. 41.275-63.500mm
41.275(1 %/8)
LRB 263216LRB 263220
───
──
LRBZ 263216LRBZ 263220LRBZ 263220 B
44.450(1 #/4)
LRB 283624LRB 283628
───
──
LRBZ 283624LRBZ 283628LRBZ 283628 B
25.65032.00025.65032.00032.000
38.35044.70038.35044.70044.700
41.275(1 %/ 8)
41.275(1 %/ 8)
41.275(1 %/ 8)
41.275(1 %/ 8)
41.275(1 %/ 8)
44.450(1 #/ 4)
44.450(1 #/ 4)
44.450(1 #/ 4)
44.450(1 #/ 4)
44.450(1 #/ 4)
50.800(2 )
50.800(2 )
50.800(2 )
50.800(2 )
50.800(2 )
57.150(2 !/ 4)
57.150(2 !/ 4)
57.150(2 !// 4)
57.150(2 !/ 4)
57.150(2 !// 4)
135170135170170
300345300345345
4848484848
52.552.552.552.552.5
1.51.5111
1.51.51.51.51.5
4949494949
5555555555
INNER RINGS
LRB
Inner Rings for General Usage Inch Series
H29
�
Assembled bearings
BR 526828
BR 526832
GBR 526828 GBR 526828UU
BR 526828UU
GBR 526832
BR 567232
GBR 567232 GBR 567232UU
BR 567232UU
BR 607632
GBR 607632 GBR 607632UU
BR 607632UU
BR 648032
GBR 648032 GBR 648032UU
GBR 688432 GBR 688432UU
LRBZ LRBZ…B
H321N=0.102kgf=0.2248lbs.1mm=0.03937inch
Shaft dia. 69.850-95.250mm
Inner Rings for General Usage
Note(1) Maximum allowable fillet corner radius of shaft Remark LRBZ has no oil hole. LRB with inner ring bore diameter d of 76.200 mm or less and LRBZ…B are provided with an oil groove and
an oil hole.Other models are provided with an oil groove and two oil holes.
Shaft dia.
mm(inch)
Mass(Ref.)
Identification number
g d F B Min. Max. Max.
──
LRBZ 445228LRBZ 445228 BLRBZ 445232
69.850(2 #/4)
LRB 445228LRB 445232
───
76.200(3)
LRB 485632──
─LRBZ 485632LRBZ 485632 B
82.550(3 !/4)
88.900(3 !/2)
LRB 526032──
LRB 566432─
─LRBZ 526032LRBZ 526032 B
─LRBZ 566432
(1)
Boundary dimensionsmm(inch)
Standard mountingdimensions mm
d a ras max
7777777777
83.583.583.5
919191
9797
221.51.51.5
21.51.5
2.51.51.5
2.51.5
7979797979
868686
939393
9999
44.70051.05044.70044.70051.050
51.05051.05051.050
51.05051.05051.050
51.05051.050
69.850(2 #/ 4)
69.850(2 #/ 4)
69.850(2 #/ 4)
69.850(2 #/ 4)
69.850(2 #/ 4)
76.200(3 )
76.200(3 )
76.200(3 )
82.550(3 !/ 4)
82.550(3 !/ 4)
82.550(3 !/ 4)
88.900(3 !/ 2)
88.900(3 !/ 2)
82.550(3 !/ 4)
82.550(3 !/ 4)
82.550(3 !/ 4)
82.550(3 !/ 4)
82.550(3 !/ 4)
88.900(3 !/ 2)
88.900(3 !/ 2)
88.900(3 !/ 2)
95.250(3 #// 4)
95.250(3 #// 4)
95.250(3 #// 4)
101.600(4 )
101.600(4 )
530600530530600
640640640
690690690
750750
95.250(3 #/4) ─ LRBZ 606832 103 1.510551.05095.250(3 #// 4) 107.950(4 !/ 4)800
INNER RINGS
LRB
Inch Series
H31