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28521 Inch Tapered Roller Bearings
28521 Inch Tapered Roller Bearings
28521 Inch Tapered Roller Bearings
Diagram of DSBR Inch Tapered Roller Bearings
Diagram of DSBR Inch Tapered Roller Bearings

28580/28521 Inch Tapered Roller Bearings

The DSBR 28580/28521 tapered roller bearing is a premium inch-series solution designed to handle heavy radial and axial loads in demanding environments. Commonly used in truck axles, trailers, agricultural equipment, and industrial gearboxes, this bearing is manufactured from high-quality alloy steel and undergoes advanced heat treatment for exceptional wear resistance and long service life. Its cone and cup separable structure simplifies installation, inspection, and replacement. Precision grinding ensures smooth rotation, reduced friction, and higher operational efficiency. As a factory-direct supplier, DSBR guarantees OEM-level quality, competitive pricing, and reliable global delivery, making it a trusted choice for distributors and manufacturers worldwide.

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Technical Specification Technical Specification

Technical Specification of 28580/28521 Inch Tapered Roller Bearings

Specifications
Series28500
Cone Part Number28580
Cup Part Number28521
Design UnitInch
Cage MaterialStamped Steel
Related Assembly Number(s)28580-90012
Dimensions
d - Bore2 in
50.80 mm
D - Cup Outer Diameter3.6250 in
92.075 mm
B - Cone Width1.0000 in
25.400 mm
C - Cup Width0.7813 in
19.845 mm
T - Bearing Width0.9688 in
24.608 mm
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius10.14 in
3.600 mm
r - Cup Backface "To Clear" Radius20.030 in
0.76 mm
da - Cone Frontface Backing Diameter2.24 in
57 mm
db - Cone Backface Backing Diameter2.48 in
63 mm
Da - Cup Frontface Backing Diameter3.46 in
87.88 mm
Db - Cup Backface Backing Diameter3.27 in
83.06 mm
Ab - Cage-Cone Frontface Clearance0.06 in
1.5 mm
Aa - Cage-Cone Backface Clearance0.04 in
1 mm
a - Effective Center Location3-0.19 in
-4.8 mm
Basic Load Ratings
C90 - Dynamic Radial Rating (90 million revolutions)45770 lbf
25700 N
C1 - Dynamic Radial Rating (1 million revolutions)522200 lbf
98900 N
C0 - Static Radial Rating29200 lbf
130000 N
Ca90- Dynamic Thrust Rating (90 million revolutions)63720 lbf
16600 N
Factors
K - Factor71.55
e - ISO Factor80.38
Y - ISO Factor91.59
G1 - Heat Generation Factor (Roller-Raceway)46.4
G2 - Heat Generation Factor (Rib-Roller End)22.6
Cg - Geometry Factor100.0912


Contact DSBR for More Information
Contact DSBR for More Information
2010
SINCE
9
PATENTS
120
EXPERT WORKERS
40
EXPORT COUNTRIES
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