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SOLE AUTHORISED UK DISTRIBUTORS
TR Ball bearing units
Technical catalogue
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NBC Group contact details
Head Off ice
Orleton Lane, Wellington, Telford, TF12 BG, Shropshire,
England
Trade sales: Phone: 01952 222400Fax: 01952 641325
E-mail: [email protected]
OEM Sales: Phone: 01952 222300
Fax: 01952 242938E-mail: [email protected]
Export Sales: Phone: +44 (0) 1952 245454Fax: +44 (0) 1952
242070
E-mail: [email protected]
Industrial Bearings (Anglia) Ltd
Phone: 01206 793322
Fax: 01206 798401E-mail: [email protected]
RDR Bearings (Belfast ) Ltd
Phone: 028 907 32321
Fax: 028 907 31889
E-mail: [email protected]
TR is the registered trademark of the DongGuan TR Bearing
Company
In the interests of continued improvement, TRand NBC Group
reserve the right to modify any produc t or specification w
ith-
out prior notice. All weights and measures are approximate and
for guidance only.
Copyright NBC Group Ltd
Any reproduction or unauthor ized use of t his mater ial is st
rict ly prohib ited w ithout pr io r approval in wri ting from NB C
Group
Ltd
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Table of contents
Quick reference guide 1
Features of TR ball bearing units 2
Types of ball bearing units 4
Ball bearing inserts 7
Ring and ball materials 7
Bearing tolerances 8
Radial internal clearance of inserts 10
Bearing housings 11
Housing material 11
Tolerances for housings 11
Pressed housings 15
Selection of ball bearing units 16
Basic load rating and life 16
Bearing selection according to basic dynamic load rating 17
Adjusted rating life equation 22
Lubrication and operating temperature 24
Limiting speed 26
Shaft design 27
Mounting of bearings on shafts 29
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No.
HT200
Major wall thickness ofcasting piece
(mm)
Strain mininmum stressmin
(N/mm2)b
Hardness
(HB)
>2.5~10
>10~20
>20~30
>30~50
220
195
170
160
157~236
150~225
139~209
129~192
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0
-0.80
-0.046
-0.054
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3
(mm)
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PF PFT PFL
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fn
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se refer to page C-1 C-19.)
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