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SKF 71920 ACDGA/P4A Angular Contact Ball Bearing

Description


These High Precision Angular Contact Bearings are specifically designed for machine tool and spindles, but are also suitable for other applications that require high precision. They are produced with a 25 degree (C) contact angle providing medium axial load capacity without compromising speed. The cage is a lightweight and durable glass reinforced fiber providing for smooth operation at high speeds. The rings and balls are produced to P4A or P2H (Abec 7/9) with high polished raceways to provide the least friction and optimal high speed operation.
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  • SKF 71920 ACDGA/P4A Angular Contact Ball Bearing

  • SKF

 

General Descriptions

Brand
SKF

Bearing Category
Angular Contact Ball Bearings

Description
SKF manufactures super-precision angular contact ball bearings for shaft diameters from 6 to 360 mm. Application requirements vary, and as a result, the SKF assortment of super-precision angular contact ball bearings includes four ISO dimension series, in numerous executions. The wide selection of designs and variants enables them to be incorporated into virtually every machine tool application as well as other applications where precision bearings are required.

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Dimensions

d 100 mm
D 140 mm
B 20 mm
d1 112.3 mm
d2 112.3 mm
D1 127.7 mm
r1,2 (min.) 1.1 mm
r3,4 (min.) 0.6 mm
a 26.1 mm


Abutment dimensions



da (min.) 106 mm
db (min.) 106 mm
Da (max.) 134 mm
Db (max.) 136 mm
ra (max.) 1 mm
rb (max.) 0.6 mm
dn 115.6 mm


Calculation data

Basic dynamic load rating (C) 60.5 kN
Basic static load rating (C0) 65.5 kN
Fatigue load limit (Pu) 2.55 kN
Attainable speed for grease lubrication 8500 r/min
Attainable speed for oil-air lubrication 14000 r/min
Ball diameter (Dw) 12.7 mm
Number of balls (z) 26
Reference grease quantity (Gref) 10.5 cm³


Mass

Mass bearing 0.8 kg


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