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7221C

Standard Series High Precision Angular Contact Ball Bearings
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Parts Number
7221CTRSUHP4 Standard Series High Precision Angular Contact Ball Bearings
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Parts Number

7221CTRSUHP4

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 205 kN Basic Dynamic Load Rating
C0r 143 kN Basic Static Load Rating

Speeds

Grease 7800 min-1 Limiting Speed
Oil (Oil-air) 11900 min-1 Limiting Speed

Dimensions

C: 15° Contact Angle
a 37.7 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 97.5 kN Permissible Axial Load

Calculation factors

f0 14.5 Factor

Preload,Rigidity(DB and DF arrangement)

Preload Axial Rigidity Measured axial clearance
EL 540N 108N/μm -21μm
L 1077N 144N/μm -38μm
M 2651N 216N/μm -73μm
H 5311N 304N/μm -114μm

Additional information

21 g/brg Recommended Grease Quantities

Mass

3.78 kg Mass(approx.)
Designations Basic Load Ratings Axial Internal Clearance Accuracy Limiting Speeds Mass
Cr
 C0r
 min
 max
 Grease
(min-1)		 Oil (Oil-air)
(min-1)
(kg)
7221CTRSUHP4 205 143 P4: ISO Class 4 7800 11900 3.78

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CAD
More Information
NSK Product Type2 SP_ACBB_ST_C
NSK Product Type Super Precision Bearing
Designations 7221C

© NSK Ltd.

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