TIMKEN 687/672B bearing


The Fafnir® brand of bearings were originally manufactured by "The Fafnir Bearing Company" which was started in New Britain, Connecticut in 1911. Founder Howard S. Hart started the company based upon the need at that time for less expensive alternatives to English and German made ball bearings.



Tapered roller bearings 687/672B

Bearing number : 687/672B

Brand : Timken

Bore Diameter (mm) : 101,6

Outer Diameter (mm) : 175,3

Bearing dimensions and specification in Timken catalogue:

d - 101,6 mm

D - 168,275 mm

D1 - 175,3 mm

T1 - 18,255 mm

B - 41,275 mm

C - 30,162 mm

R - 3,6 mm

r - 3,3 mm

a - -2,8 mm

D1 - 175,336 mm

Da - 149 mm

db - 118 mm

C2 - 7,142 mm

da - 112 mm

Weight - 3,48 Kg

Basic dynamic load rating (C) - 386 kN

Basic static load rating (C0) - 386 kN

Limiting speed - 3000 r/min

Factor (G1) - 182,5

Factor (G2) - 37,3

Factor (K) - 1,24

Basic dynamic load rating (C90) - 63,5

Basic dynamic load rating (Ca90) - 51,2

Basic dynamic load rating (C1) - 245 kN

Calculation factor (e) - 0,47

Calculation factor (Y) - 1,28

Bearing 687/672B

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