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7921A5SN24

Standard Series High Precision Angular Contact Ball Bearings
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Parts Number
7921A5SN24TYNSUHP4Y Standard Series High Precision Angular Contact Ball Bearings
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Parts Number

7921A5SN24TYNSUHP4Y

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 48.5 kN Basic Dynamic Load Rating
C0r 51.5 kN Basic Static Load Rating

Speeds The limiting speeds of the ball guided cage is lower than the outer ring guided cage.

Grease 8000 min-1 Limiting Speed
Oil (Oil-air) 11000 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 48.7 kN Permissible Axial Load

Preload,Rigidity(DB and DF arrangement)

Preload Axial Rigidity Measured axial clearance
EL 296N 234N/μm -4μm
L 636N 308N/μm -9μm
M 1565N 432N/μm -19μm
H 3208N 577N/μm -32μm

Additional information

4.8 g/brg Recommended Grease Quantities

Mass

0.718 kg Mass(approx.)
CAD
More Information
NSK Product Type2 SP_ACBB_ST_A5
NSK Product Type Super Precision Bearing
Designations 7921A5SN24

© NSK Ltd.

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