Timken 644 – 632D
Tapered Roller Bearings - TDO (Tapered Double Outer) Imperial
(BRAND)：TIMKEN
(Availability)：In Stock
(EMAIL)：info@noksbearings.com
Specifications
Series
635
Cone Part Number
644
Cup Part Number
632D
Design Unit
Inch
Cage Material
Stamped Steel
Related Assembly Number(s)
644-90035
Dimensions
d - Bore
71.438 mm
D - Cup Outer Diameter
136.525 mm
B - Cone Width
41.275 mm
C - Double Cup Width
76.2 mm
T - Bearing Width across Cones
95.250 mm
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius1
3.600 mm
r - Cup Backface "To Clear" Radius2
1.5 mm
db - Cone Backface Backing Diameter
87 mm
Da - Cup Frontface Backing Diameter
125.98 mm
Aa - Cage-Cone Backface Clearance
3.8 mm
a - Effective Center Location3
-11.2 mm
Basic Load Ratings
C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)4
71600 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)5
481000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)6
125000 N
C7
44400 N
Factors
K - Factor8
1.61
e - ISO Factor9
0.36
Y1 - ISO Factor10
1.86
Y2 - ISO Factor11
2.78
Cg - Geometry Factor12
0.0814
