DESCRIPTION:                                                                                    ITEM#: BRG 83

Specifications

Series

74000

Cone Part Number

74550

Design Units

Imperial

Cage Type

Stamped Steel
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1150000 lbf665000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)238800 lbf172000 N

Dimensions

d - Cone Bore

5 1/2 in139.700 mm

B - Cone Width

1.875 in47.625 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius30.14 in3.600 mm

da - Cone Frontface Backing Diameter

5.94 in151 mm

db - Cone Backface Backing Diameter

6.22 in158 mm

Ab - Cage-Cone Frontface Clearance

0.11 in2.8 mm

Aa - Cage-Cone Backface Clearance

0.17 in4.3 mm
a - Effective Center Location40.09 in2.3 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)522300 lbf99000 N
C1 - Dynamic Radial Rating (1 million revolutions)685900 lbf382000 N

C0 - Static Radial Rating

138000 lbf614000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)718600 lbf82600 N

Factors

K - Factor81.2

G1 - Heat Generation Factor (Roller-Raceway)

362.9

G2 - Heat Generation Factor (Rib-Roller End)

68.5
Cg - Geometry Factor90.134
  • 1 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 2 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values for a single-row, C90(2) is the two-row radial value.
  • 3 These maximum fillet radii will be cleared by the bearing corners.
  • 4 Negative value indicates effective center inside cone backface.
  • 5 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 6 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 7 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values for a single-row, C90(2) is the two-row radial value.
  • 8 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 9 Geometry constant for Lubrication Life Adjustment Factor a3l.


74550: 139.7mm x 215.9mm x 47.63mm















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