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7921A5

Standard Series High Precision Angular Contact Ball Bearings
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Parts Number
7921A5TRSUELP3 Standard Series High Precision Angular Contact Ball Bearings
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Parts Number

7921A5TRSUELP3

Boundary Dimensions

d 105 mm Bore diameter
D 145 mm Outside diameter
B 20 mm Width
r(min.) 1.1 mm Chamfer Dimension
r1(min.) 0.6 mm Chamfer Dimension

Basic Load Ratings

Cr 50.5 kN Basic Dynamic Load Rating
C0r 54.0 kN Basic Static Load Rating

Speeds

Grease 8000 min-1 Limiting Speed
Oil (Oil-air) 12000 min-1 Limiting Speed

Dimensions

A5: 25° Contact Angle
a 39.2 mm Effective Load Center

Abutment and Fillet Dimensions

da(min.) 112 mm Diameter of Shaft Abutment
Da(max.) 138 mm Diameter of Housing Abutment
Db(max.) 140 mm Diameter of Housing Abutment
ra(max.) 1 mm Radius of Shaft or Housing Fillet
rb(max.) 0.6 mm Radius of Shaft or Housing Fillet

Performance

Pa 41.0 kN Permissible Axial Load

Preload,Rigidity(DB and DF arrangement)

Preload Axial Rigidity Measured axial clearance
EL 272N 203N/μm -4μm
L 565N 265N/μm -9μm
M 1361N 369N/μm -19μm
H 2760N 491N/μm -32μm

Additional information

4.8 g/brg Recommended Grease Quantities

Mass

0.820 kg Mass(approx.)
CAD
More Information
NSK Product Type2 SP_ACBB_ST_A5
NSK Product Type Super Precision Bearing
Designations 7921A5

© NSK Ltd.

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