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7221A5

Standard Series High Precision Angular Contact Ball Bearings
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Parts Number
7221A5TRSULP4Y Standard Series High Precision Angular Contact Ball Bearings
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Parts Number

7221A5TRSULP4Y

Boundary Dimensions

d 105 mm Bore diameter
D 190 mm Outside diameter
B 36 mm Width
r(min.) 2.1 mm Chamfer Dimension
r1(min.) 1.1 mm Chamfer Dimension

Basic Load Ratings

Cr 163 kN Basic Dynamic Load Rating
C0r 137 kN Basic Static Load Rating

Speeds

Grease 6800 min-1 Limiting Speed
Oil (Oil-air) 10200 min-1 Limiting Speed

Dimensions

A5: 25° Contact Angle
a 52.4 mm Effective Load Center

Abutment and Fillet Dimensions

da(min.) 117 mm Diameter of Shaft Abutment
Da(max.) 178 mm Diameter of Housing Abutment
Db(max.) 183 mm Diameter of Housing Abutment
ra(max.) 2 mm Radius of Shaft or Housing Fillet
rb(max.) 1 mm Radius of Shaft or Housing Fillet

Performance

Pa 111 kN Permissible Axial Load

Preload,Rigidity(DB and DF arrangement)

Preload Axial Rigidity Measured axial clearance
EL 862N 268N/μm -15μm
L 1790N 348N/μm -27μm
M 3950N 471N/μm -48μm
H 7929N 625N/μm -77μm

Additional information

21 g/brg Recommended Grease Quantities

Mass

3.77 kg Mass(approx.)
CAD
More Information
NSK Product Type2 SP_ACBB_ST_A5
NSK Product Type Super Precision Bearing
Designations 7221A5

© NSK Ltd.

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