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Date: 2016-08-22

Timken 78214 - 78551 bearing stock, Dimensions, Drawing

Series 78000
Cone Part Number 78214
Cup Part Number 78551
Design Units Imperial
Bearing Weight 5.8000 lb
2.7000 Kg
Cage Type Stamped Steel
D - Cup Outer Diameter 5.5130 in
140.030 mm
d - Cone Bore 2.1250 in
53.975 mm
B - Cone Width 1.3085 in
33.236 mm
C - Cup Width 0.9260 in
23.520 mm
T - Bearing Width 1.4375 in
36.513 mm
Z - Number of Rollers Per Row 16
R - Cone Backface "To Clear" Radius1 0.030 in
0.760 mm
r - Cup Backface "To Clear" Radius2 0.090 in
2.29 mm
da - Cone Frontface Backing Diameter 3.03 in
76.96 mm
db - Cone Backface Backing Diameter 2.95 in
74.93 mm
Da - Cup Frontface Backing Diameter 5.22 in
132.59 mm
Db - Cup Backface Backing Diameter 4.61 in
117.09 mm
Ab - Cage-Cone Frontface Clearance 0.16 in
4.06 mm
Aa - Cage-Cone Backface Clearance 0.27 in
6.86 mm
a - Effective Center Location3 0.31 in
7.90 mm
C90 - Dynamic Radial Rating (90 million revolutions)1 11800 lbf
52600 N
C1 - Dynamic Radial Rating (1 million revolutions)2 45600 lbf
203000 N
C0 - Static Radial Rating 43400 lbf
193000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)3 17500 lbf
77900 N
K - Factor1 0.67
e - ISO Factor2 0.87
Y - ISO Factor3 0.69
G1 - Heat Generation Factor (Roller-Raceway) 62.6
G2 - Heat Generation Factor (Rib-Roller End) 19.1
Cg - Geometry Factor 0.0884



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