Montage of Timken Bearing Products 
Search Catalog
        
 All Product Types    Tapered Roller Bearings - Double Tapered Cones - Imperial
View Cart View RFQs Express Ordering  | Shipping 
 | Tax 
 | Terms
 Shopping Cart 0 Items
 Request for Quote 0 Items
All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - Double Cones > Tapered Roller Bearings - Double Tapered Cones - Imperial > Part Number LM278848D  
Download PDF Download PDF     Printable Page     Email Email This Page     Save To Favorites Save To Favorites
Add To Cart Request Quote

Part Number LM278848D, Tapered Roller Bearings - Double Tapered Cones - Imperial


TDI bearings have a one-piece double inner race and two single outer races and are typically supplied complete with an outer race spacer as a pre-set assembly. The bearing can be used at fixed positions on rotation shaft applications. For rotating housing application it can be used to float on the stationary shaft.



Unit of Measure: Imperial Metric Both

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

Specifications

Series
LM278800

Cone Part Number
LM278848D

Design Units
Imperial

Cage Type
Pin-Type

C1 - Dynamic Radial Rating (1 million revolutions)1
740000 lbf
3290000 N

C0 - Static Radial Rating
1860000 lbf
8280000 N

Note
This part has a non-standard shoulder design. Please email customer CAD for shoulder details to ensure the proper design of mating components.
1 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.


Dimensions

d - Cone Bore
23.0625 in
585.788 mm

B - Double Cone Width
9.0625 in
230.188 mm


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
0.25 in
6.4 mm

da - Cone Frontface Backing Diameter
24.25 in
616 mm

Ab - Cage-Cone Frontface Clearance
0.31 in
7.9 mm
1 These maximum fillet radii will be cleared by the bearing corners.


Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)1
192000 lbf
853000 N

C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)2
1290000 lbf
5730000 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)3
334000 lbf
1490000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)4
109000 lbf
486000 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.
4 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
1.76

G1 - Heat Generation Factor (Roller-Raceway)
11600

G2 - Heat Generation Factor (Rib-Roller End)
784

Cg - Geometry Factor2
0.291
1 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
2 Geometry constant for Lubrication Life Adjustment Factor a3l.



 DOWNLOADS 

Bearing Life Calculation Tool

Bearing Dimensional Tolerances


Add To Cart Request Quote
<