TIMKEN Bearing 3478 - 3420-B

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.
Material: Bearing steels
In Stock:
Photo may not represent actual item. See the technical specification for details.

Specifications of TIMKEN Bearing 3478 - 3420-B

TIMKEN Bearing 3478 - 3420-B

Specifications

Series

3400

Cone Part Number

3478

Cup Part Number

3420-B

Design Unit

Inch

Bearing Weight

2 lb0.9 Kg

Cage Material

Stamped Steel

Dimensions

d – Bore

1.375 in34.925 mm

D – Cup Outer Diameter

3.125 in79.375 mm

D1 – Flange Outer Diameter

3.3090 in84.049 mm

B – Cone Width

1.1721 in29.771 mm

C – Cup Width

0.9375 in23.813 mm

C1 – Cup Flange Width

0.1875 in4.763 mm

T1 – Bearing Width to Flange

0.4063 in10.320 mm

Abutment and Fillet Dimensions

R – Cone Backface “To Clear” Radius1

0.14 in3.6 mm

r – Cup Backface “To Clear” Radius2

0.130 in3.3 mm

da – Cone Frontface Backing Diameter

1.71 in43.5 mm

db – Cone Backface Backing Diameter

1.97 in50 mm

Da – Cup Frontface Backing Diameter

3.03 in75.95 mm

Ab – Cage-Cone Frontface Clearance

0.05 in1.3 mm

Aa – Cage-Cone Backface Clearance

0.04 in1 mm

a – Effective Center Location3

-0.34 in-8.6 mm

Basic Load Ratings

C90 – Dynamic Radial Rating (90 million revolutions)4

6100 lbf27100 N

C1 – Dynamic Radial Rating (1 million revolutions)5

23500 lbf105000 N

C0 – Static Radial Rating

26800 lbf119000 N

Ca90 – Dynamic Thrust Rating (90 million revolutions)6

3820 lbf17000 N

Factors

K – Factor7

1.6

e – ISO Factor8

0.37

Y – ISO Factor9

1.64

G1 – Heat Generation Factor (Roller-Raceway)

29.9

G2 – Heat Generation Factor (Rib-Roller End)

11.2

Cg – Geometry Factor10

0.0781

Substitute products of TIMKEN Bearing 3478 - 3420-B

Literature & catalogs

TIMKEN -LUBRICATION
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TIMKEN -TYPE- TDI
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TIMKEN-TAPERED ROLLER BEARING CAGES
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TIMKEN-TYPE- TS
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Videos

TIMKEN

Timken Tricks of the Trade – Installing a Timken® Set Right® Bearing

Timken Stronger By Design

Timken Tricks of the Trade Wheel End Bearing Removal Tips