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All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TSF (Tapered Single with Flange) > Tapered Roller Bearings - TSF (Tapered Single with Flange) Imperial > Part Number 621 - 612-B  
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Part Number 621 - 612-B, Tapered Roller Bearings - TSF (Tapered Single with Flange) Imperial


Like the TS bearing design, the TSF design consists of two main separable parts: the cone (inner ring) assembly and the cup (outer ring). It is typically mounted in opposing pairs on a shaft. TSF bearings have flanged cups to facilitate axial location and accurately align seals in through-bored housings.



Unit of Measure: Imperial Metric Both

Specifications  · Dimensions  · Abutment and Fillet Dimensions  · Basic Load Ratings  · Factors

Specifications

Series
615

Cone Part Number
621

Cup Part Number
612-B

Design Unit
Inch

Cage Material
Stamped Steel


Dimensions

d - Bore
2.1250 in
53.975 mm

D - Cup Outer Diameter
4 3/4 in
120.650 mm

D1 - Flange Outer Diameter
5.0272 in
127.691 mm

B - Cone Width
1.625 in
41.275 mm

C - Cup Width
1.2500 in
31.750 mm

C1 - Cup Flange Width
0.2812 in
7.142 mm

T1 - Bearing Width to Flange
0.6562 in
16.667 mm


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
0.14 in
3.600 mm

r - Cup Backface "To Clear" Radius2
0.130 in
3.30 mm

da - Cone Frontface Backing Diameter
2.48 in
63 mm

db - Cone Backface Backing Diameter
2.76 in
70 mm

Da - Cup Frontface Backing Diameter
4.35 in
110.49 mm

Ab - Cage-Cone Frontface Clearance
0.11 in
2.8 mm

Aa - Cage-Cone Backface Clearance
0.13 in
3.3 mm

a - Effective Center Location3
-0.55 in
-14 mm
1 These maximum fillet radii will be cleared by the bearing corners.
2 These maximum fillet radii will be cleared by the bearing corners.
3 Negative value indicates effective center inside cone backface.


Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)1
12100 lbf
53800 N

C1 - Dynamic Radial Rating (1 million revolutions)2
46600 lbf
207000 N

C0 - Static Radial Rating
54800 lbf
244000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
6510 lbf
28900 N
1 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
2 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
3 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.


Factors

K - Factor1
1.86

e - ISO Factor2
0.31

Y - ISO Factor3
1.91

G1 - Heat Generation Factor (Roller-Raceway)
75.9

G2 - Heat Generation Factor (Rib-Roller End)
16.2

Cg - Geometry Factor4
0.0694
1 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
2 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
3 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
4 Geometry constant for Lubrication Life Adjustment Factor a3l.


 MORE IMAGES 

·  Timken_TRB_1ROWASSY_TSF_32312BM-90KM2-S

·  Timken_TRB_1ROWASSY_TSF_32312BM-90KM2-T



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