55TAC20F

Angular Contact Thrust Ball Bearings (NSKTAC F Series)

55TAC20F

Angular Contact Thrust Ball Bearings (NSKTAC F Series)

Images shown are representations. Designs and specifications may differ from actual products.

Designations

55TAC20F

Boundary Dimensions

d 55 mm Bore diameter
D 90 mm Outside diameter
T 44 mm Inner Ring Width
C 22 mm Outer Ring Width
r(min.) 1.1 mm Chamfer Dimension
r1(min.) 0.6 mm Chamfer Dimension

Basic Load Ratings

Ca 31.5 kN Basic Dynamic Load Rating
C0a 81.0 kN Basic Static Load Rating

Speeds

Grease 6200 min-1 Limiting Speed (EL-Preload)
Oil (Oil-air) 6900 min-1 Limiting Speed (EL-Preload)
Grease 5300 min-1 Limiting Speed (L-Preload)
Oil (Oil-air) 5900 min-1 Limiting Speed (L-Preload)

Dimensions

50° Contact Angle

Abutment and Fillet Dimensions

ra(max.) 1 mm Radius of Shaft or Housing Fillet
rb(max.) 0.6 mm Radius of Shaft or Housing Fillet
da 69 mm Diameter of Shaft Abutment
Da 84 mm Diameter of Housing Abutment

Performance

Pa 13.3 kN Permissible Axial Load

Preload,Rigidity(DB and DF arrangement)

Preload Axial Rigidity Measured axial clearance
EL 580N 565N/μm -5μm
L 2485N 934N/μm -15μm

Additional information

2.2 g/brg Recommended Grease Quantities

Holes Dimensions

W 8 mm Oil Groove Width
m 4 Number of Holes
L 3 mm Notch Width

Mass

0.442 kg Mass(approx.)
CAD
More Information
NSK Product Type2 SP_ACTBB_TAC_F
NSK Product Type Super Precision Bearing
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