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Date: 2016-08-22

Timken 644 - 633 bearing stock, Dimensions, Drawing

Series 635
Cone Part Number 644
Cup Part Number 633
Design Units Imperial
Bearing Weight 4.9000 lb
2.2000 Kg
Cage Type Stamped Steel
D - Cup Outer Diameter 5.1250 in
130.175 mm
d - Cone Bore 2.8125 in
71.438 mm
B - Cone Width 1.6250 in
41.275 mm
C - Cup Width 1.2500 in
31.750 mm
T - Bearing Width 1.6250 in
41.275 mm
Z - Number of Rollers Per Row 18
R - Cone Backface "To Clear" Radius1 0.140 in
3.560 mm
r - Cup Backface "To Clear" Radius2 0.130 in
3.30 mm
da - Cone Frontface Backing Diameter 3.87 in
81.03 mm
db - Cone Backface Backing Diameter 3.43 in
87.12 mm
Da - Cup Frontface Backing Diameter 4.89 in
124.00 mm
Db - Cup Backface Backing Diameter 4.57 in
116.08 mm
Ab - Cage-Cone Frontface Clearance 0.08 in
2.03 mm
Aa - Cage-Cone Backface Clearance 0.17 in
4.32 mm
a - Effective Center Location3 -0.44 in
-11.20 mm
C90 - Dynamic Radial Rating (90 million revolutions)1 16100 lbf
71600 N
C1 - Dynamic Radial Rating (1 million revolutions)2 62100 lbf
276000 N
C0 - Static Radial Rating 67000 lbf
298000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)3 9980 lbf
44400 N
K - Factor1 1.61
e - ISO Factor2 0.36
Y - ISO Factor3 1.66
G1 - Heat Generation Factor (Roller-Raceway) 106
G2 - Heat Generation Factor (Rib-Roller End) 21
Cg - Geometry Factor 0.0814



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