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0-80
1-64
1-72
2-56
2-64
3-48
3-56
4-40
4-48
5-40
5-44
6-32
6-40
8-32
8-36
10-24
10-32
12-24
12-28
1/4-20
1/4-28
5/16-18
5/16-24
3/8-16
3/8-24
7/16-147/16-20
1/2-13
1/2-20
9/16-12
9/16-18
5/8-11
5/8-18
11/16-1111/16-163/4-10
3/4-16
7/8-9
7/8-14
1-8
1-12
1-14
1-1/8-7
1-1/8-12
1-1/4-7
1-1/4-12
1-3/8-6
1-3/8-12
1-1/2-6
1-1/2-12
74718159686774627056787069567465726171657263726469607462706076697568757377707770667067726678707469
7570757568756474678469826076638260757581697270736279627464826879627365826781736481678166816669628066
7.75mm8.50mm
Q8.70mm11/329.50mm3/8
10.20mmY
10.80mm27/64
12.00mm15/32
12.50mm14.00mm35/64
14.50mm15.50mm39/64
16.50mm17.50mm11/16
19.50mm49/64
21.00mm53/64
24.00mm15/16
26.50mm1-3/64
29.50mm1-11/64
563/645453
1.50mm5351505049485/6446454443
2.35mm4239383837367/643332
3.40mm29299/64
3.70mm255/3221
11/6417161597
13/643
5.50mmFG
6.80mmI
5/16O
Q8.50mm
UW
25/6427/64
11.00mm11.40mm29/6415/3231/641/233/6417/3235/649/1637/6419/325/841/6421/3211/16
17.50mm49/6425/3251/6413/167/857/6429/3259/6459/6415/1663/64I
1-1/321-3/641-3/321-7/641-1/81-5/321-11/641-13/641-19/641-9/321-19/641-11/321-23/641-13/321-27/64
1.6x.351.8x.352.0x.4
2.2x.452.5x.45
3.0x.5
3.5x.6
4.0x.7
4.5x.75
5.0x.8
5.5x.9
6.0x.75
6.0x1.0
7.0x.75
7.0x1.0
8.0x1.25
8.0x1.0
9.0x1.2510x1.5
10x1.25
11x1.5
12x1.75
12x1.25
14x2.0
14x1.516x2.0
16x1.518x2.5
18x1.520x2.5
22x2.5
24x3.0
27x3.0
30x3.5
33x3.5
Tap Drill SizesTap Size
1.25mm1.45mm1.60mm
521.75mm2.05mm
462.50mm
402.90mm
333.30mm
303.70mm
264.20mm
194.60mm
145.30mm
45.00mm
96.30mm
D6.00mm15/646.70mm17/647.00mm
J
69696966706967687068726973747069686867747370717472707374716966
7371757371707174716772727671727671737470737473757372737874737472
1/16”-271/8”-271/4”-183/8”-181/2”-143/4-141”-111-1/4”-111-1/2”-112”-112-1/2”-8
CQ
7/169/1645/6429/321-9/641-31/641-23-322-3/162-5/8
1/4Q
7/1637/6445/6459/641-5/321-1/21-47/642-13/642-21/32
Metric Tap Drill SizesTap Drill
Size% of
ThreadTap Size
Tap DrillSize
% ofThread
Pipe Tap Drill Sizes
Tap Size
Tap DrillSize
% ofThread
Tap Size
Tap DrillSize
% ofThread
Tap Size NPT Tap Drill NPS Tap Drill
© Copyright 2011 Champion Cutting Tool Corp.
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1/2
1/21/2
DecimalCard_0111:Layout 1 2/1/11 3:22 PM Page 1
www.championcuttingtool.com
Drills • Magnetic Drill Presses • Annular Cutters • Taps • Dies • Reamers • Carbide BursCarbide Tipped Hole Cutters • Countersinks • Step Drills • End Mills • Masonry Drills & Chisels
.0135
.0145
.0156
.0160
.0180
.0197
.0200
.0210
.0225
.0240
.0250
.0260
.0280
.0292
.0310
.0312
.0320
.0330
.0350
.0360
.0370
.0380
.0390
.0394
.0400
.0410
.0420
.0430
.0465
.0469
.0520
.0550
.0591
.0595
.0625
.0635
.0669
.0670
.0700
.0730
.0760
.0781
.0785
.0787
.0810
.0820
.0860
.0890
.0935
.0938
.0960
.0980
.0984
.0995
.1015
.1040
.1065
.1094
.1100
.1110
.1130
.1160
.1181
.1200
.1250
.1285
.1360
.1378
.1405
.1406
.1440
.1470
.1495
.1520
.1540
.1562
.1570
.1575
.1590
.1610
.1660
.1695
.1719
.1730
.1770
.1772
.1800
.1820
.1850
.1875
.1890
.1910
.1935
.1960
.1969
.1990
.2010
.2031
.2040
.2055
.2090
.2130
.2165
.2188
.2210
.2280
.2340
.2344
.2362
.2380
.2420
.2460
.2500
.2559
.2570
.2610
.2656
.2660
.2720
.2756
.2770
.2810
.2812
.2900
.2950
.2953
.2969
.3020
.3125
.3150
.3160
.3230
.3281
.3320
.3346
.3390
.3438
.3480
.3543
.3580
.3594
.3680
.3740
.3750
.3770
.3860
.3906
.3937
.3970
.4040
.4062
.4130
.4134
.4219
.4331
.4375
.4528
.4531
.4688
.4724
.4844
.4921
.5000
.5118
.5156
.5312
.5315
.5469
.5512
.5625
.5709
.5781
.5906
.5938
.6094
.6102
.6250
.6299
.6406
.6496
.6562
.6693
.6719
.6875
.6890
.7031
.7087
.7188
.7283
.7344
.7480
.7500
.7656
.7677
.7812
.7874
.7969
.8071
.8125
.8268
.8281
.8438
.8465
.8594
.8661
.8750
.8858
.8906
.9055
.9062
.9219
.9252
.9375
.9449
.9531
.9646
.9688
.9843
.98441.0000
80791/64"7877.50mm7675747372717069681/32"676665646362611.00mm60595857563/64"55541.50mm531/16"521.70mm515049485/64"472.00mm
46454443423/32"41402.50mm393837367/64"353433323.00mm311/8"30293.50mm289/64"27262524235/32"224.00mm2120191811/64"17164.50mm1514
133/16"12111095.00mm8713/64"65435.50mm7/32"21A15/64"6.00mmBCD1/4" E6.50mmFG17/64"HI7.00mmJK9/32"LM7.50mm19/64"N5/16"8.00mmOP
21/64"Q8.50mmR11/32"S9.00mmT23/64"U9.50mm3/8"VW25/64"10.00mmXY13/32"Z10.50mm27/64"11.00mm7/16"11.50mm29/64"15/32"12.00mm31/64"12.50mm1/2"13.00mm33/64"17/32"13.50mm35/64"14.00mm9/16"14.50mm37/64"15.00mm19/32"39/64"15.50mm
5/8"16.00mm41/64"16.50mm21/32"17.00mm43/64"11/16"17.50mm45/64"18.00mm23/32"18.50mm47/64"19.00mm3/4"49/64"19.50mm25/32"20.00mm51/64"20.50mm13/16"21.00mm53/64"27/32"21.50mm55/64"22.00mm7/8"22.50mm57/64"23.00mm29/32"59/64"23.50mm15/16"24.00mm61/64"24.50mm31/32"25.00mm63/64"1”
Decimal Equivalents/Drill SizesFractional, Wire, Letter, Metric
Decimal Drill Size Decimal Drill Size Decimal Drill Size Decimal Drill Size Decimal Drill Size
DecimalCard_0111:Layout 1 2/1/11 3:23 PM Page 2