S71920 ACB/P4ADGAMatched set of two super-precision, high-speed B design, single row angular contact ball bearings with seals

SKU: S71920 ACB/P4ADGAMatched set of two super-precision, high-speed B design, single row angular contact ball bearings with seals

These matched sets of two super-precision, high-speed B design, single row angular contact ball bearings with seals are available in a variety of arrangements. Compared to the equivalent SKF E design high-speed bearings, these are suited for lighter loads.

ID:131861

Universal matching bearing(s)
Yes, back-to-back (<>), face-to-face (><) or tandem (>>)

Dimensions - S71920 ACB/P4ADGA

Dimensions

d
100 mm
Bore diameter
D
140 mm
Outside diameter
B
40 mm
Width
d1
114.92 mm
Shoulder diameter of inner ring (large side face)
d2
113.16 mm
Shoulder diameter of inner ring (small side face)
D2
128.7 mm
Recess diameter of outer ring (large side face)
D4
130.5 mm
Recess diameter outer ring shoulder (small side face)
r1,2
min. 1.1 mm
Chamfer dimension
r3,4
min. 0.6 mm
Chamfer dimension

Abutment dimensions - S71920 ACB/P4ADGA

Abutment dimensions

da
min. 106 mm
Diameter of shaft abutment
da
max. 114.2 mm
Diameter of shaft abutment
db
min. 106 mm
Diameter of shaft abutment
db
max. 112.5 mm
Diameter of shaft abutment
Da
max. 134 mm
Diameter of housing abutment
Db
max. 136.8 mm
Diameter of housing abutment
ra
max. 1 mm
Radius of fillet
rb
max. 0.6 mm
Radius of fillet

Calculation data

Basic dynamic load rating C
33 200 N
Basic static load rating C0
42 500 N
Fatigue load limit Pu
1 630 N
Attainable speeds
Contact SKF for the attainable speeds
Contact angle α
25 °
Ball diameter Dw
7.938 mm
Number of rows i
2
Number of balls (per bearing) z
37
Preload and stiffness (back-to-back, face-to-face)
Preload class
A
Preload G
125 N
Axial stiffness
157 N/µm
Correction factors for preload calculation
Correction factor dependent on bearing series and size f
1.11
Correction factor dependent on contact angle f1
0.99
Correction factor, preload class A f2A
1
Correction factor for hybrid bearings fHC
1
Factors for equivalent bearing load calculation
Calculation factor e
0.68
Axial load factor (single, tandem) Y1
0
Axial load factor (single, tandem) Y2
0.87
Axial load factor (single, tandem) Y0
0.38
Radial load factor (single, tandem) X1
1
Radial load factor (single, tandem) X2
0.41
Radial load factor (single, tandem) X0
0.5
Axial load factor (back-to-back, face-to-face) Y1
0.92
Axial load factor (back-to-back, face-to-face) Y2
1.41
Axial load factor (back-to-back, face-to-face) Y0
0.76
Radial load factor (back-to-back, face-to-face) X1
1
Radial load factor (back-to-back, face-to-face) X2
0.67
Radial load factor (back-to-back, face-to-face) X0
1

Mass

Mass
1.76 kg

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