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Date: 2016-08-22

Timken 3979 - 3920 bearing stock, Dimensions, Drawing

Series 3900
Cone Part Number 3979
Cup Part Number 3920
Design Units Imperial
Bearing Weight 3.0000 lb
1.4000 Kg
Cage Type Stamped Steel
D - Cup Outer Diameter 4.4375 in
112.713 mm
d - Cone Bore 2.2500 in
57.150 mm
B - Cone Width 1.1830 in
30.048 mm
C - Cup Width 0.9375 in
23.813 mm
T - Bearing Width 1.1875 in
30.163 mm
Z - Number of Rollers Per Row 22
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 2.60 in
66.04 mm
db - Cone Backface Backing Diameter 2.83 in
71.88 mm
Da - Cup Frontface Backing Diameter 4.18 in
106.17 mm
Db - Cup Backface Backing Diameter 3.90 in
99.06 mm
Ab - Cage-Cone Frontface Clearance 0.04 in
1.02 mm
Aa - Cage-Cone Backface Clearance 0.09 in
2.29 mm
a - Effective Center Location3 -0.18 in
-4.60 mm
C90 - Dynamic Radial Rating (90 million revolutions)1 8090 lbf
36000 N
C1 - Dynamic Radial Rating (1 million revolutions)2 31200 lbf
139000 N
C0 - Static Radial Rating 43000 lbf
191000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)3 5570 lbf
24800 N
K - Factor1 1.45
e - ISO Factor2 0.4
Y - ISO Factor3 1.49
G1 - Heat Generation Factor (Roller-Raceway) 75.2
G2 - Heat Generation Factor (Rib-Roller End) 21.3
Cg - Geometry Factor 0.109



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