Timken 1987 – 1931-B
Tapered Roller Bearings - TSF (Tapered Single with Flange) Imperial
(BRAND)：TIMKEN
(Availability)：In Stock
(EMAIL)：info@noksbearings.com
Specifications
Series
1900
Cone Part Number
1987
Cup Part Number
1931-B
Design Unit
Inch
Cage Material
Stamped Steel
Dimensions
d - Bore
26.975 mm
D - Cup Outer Diameter
60.325 mm
D1 - Flange Outer Diameter
64.186 mm
B - Cone Width
19.355 mm
C - Cup Width
15.875 mm
C1 - Cup Flange Width
3.967 mm
T1 - Bearing Width to Flange
7.938 mm
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius1
0.800 mm
r - Cup Backface "To Clear" Radius2
0.8 mm
da - Cone Frontface Backing Diameter
31.5 mm
db - Cone Backface Backing Diameter
32.5 mm
Da - Cup Frontface Backing Diameter
57.40 mm
Ab - Cage-Cone Frontface Clearance
2 mm
Aa - Cage-Cone Backface Clearance
0 mm
a - Effective Center Location3
-5.8 mm
Basic Load Ratings
C90 - Dynamic Radial Rating (90 million revolutions)4
12500 N
C1 - Dynamic Radial Rating (1 million revolutions)5
48400 N
C0 - Static Radial Rating
50200 N
C6
7080 N
Factors
K - Factor7
1.77
e - ISO Factor8
0.33
Y - ISO Factor9
1.82
G1 - Heat Generation Factor (Roller-Raceway)
12.5
G2 - Heat Generation Factor (Rib-Roller End)
6.33
Cg - Geometry Factor10
0.0565
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