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7921C

Standard Series High Precision Angular Contact Ball Bearings
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Parts Number
7921CTRSUHP5 Standard Series High Precision Angular Contact Ball Bearings
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Parts Number

7921CTRSUHP5

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 64.5 kN Basic Dynamic Load Rating
C0r 57.0 kN Basic Static Load Rating

Speeds

Grease 9200 min-1 Limiting Speed
Oil (Oil-air) 14000 min-1 Limiting Speed

Dimensions

C: 15° Contact Angle
a 26.7 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 34.5 kN Permissible Axial Load

Calculation factors

f0 16.6 Factor

Preload,Rigidity(DB and DF arrangement)

Preload Axial Rigidity Measured axial clearance
EL 194N 86N/μm -5μm
L 396N 116N/μm -13μm
M 890N 167N/μm -27μm
H 1791N 235N/μm -45μm

Additional information

4.8 g/brg Recommended Grease Quantities

Mass

0.831 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)
7921CTRSUHP5 64.5 57.0 P5: ISO Class 5 9200 14000 0.831

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CAD
More Information
NSK Product Type2 SP_ACBB_ST_C
NSK Product Type Super Precision Bearing
Designations 7921C

© NSK Ltd.

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