7021 ACD/HCP4ALDGAMatched set of two super-precision, high-capacity, D design, single row angular contact ball bearings

SKU: 7021 ACD/HCP4ALDGAMatched set of two super-precision, high-capacity, D design, single row angular contact ball bearings

These matched sets of two super-precision, high-capacity, D design, single row angular contact ball bearings are available in a variety of arrangements. They are designed for high-load capacity and relatively high speed operation and, compared to the equivalent SKF B and E design high-speed bearings, are best suited for heavier loads.

ID:131922

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

Dimensions - 7021 ACD/HCP4ALDGA

Dimensions

d
105 mm
Bore diameter
D
160 mm
Outside diameter
B
52 mm
Width
d1
121.9 mm
Shoulder diameter of inner ring (large side face)
d2
121.9 mm
Shoulder diameter of inner ring (small side face)
D1
143.1 mm
Shoulder diameter of outer ring (large side face)
b
2.4 mm
Width of lubrication groove
C1
14.1 mm
Distance from outer ring side face to lubrication groove / lubrication hole
C2
6.2 mm
Distance from outer ring side face to O-ring groove
C3
5 mm
Distance from outer ring side face to O-ring groove
r1,2
min. 2 mm
Chamfer dimension
r3,4
min. 1 mm
Chamfer dimension

Abutment dimensions - 7021 ACD/HCP4ALDGA

Abutment dimensions

da
min. 114 mm
Diameter of shaft abutment
db
min. 114 mm
Diameter of shaft abutment
Da
max. 151 mm
Diameter of housing abutment
Db
max. 155 mm
Diameter of housing abutment
ra
max. 2 mm
Radius of fillet
rb
max. 1 mm
Radius of fillet

Calculation data

Basic dynamic load rating C
148 000 N
Basic static load rating C0
186 000 N
Fatigue load limit Pu
5 000 N
Attainable speeds
Contact SKF for the attainable speeds
Contact angle α
25 °
Ball diameter Dw
17.462 mm
Number of rows i
2
Number of balls (per bearing) z
21
Reference grease quantity (per bearing) Gref
20.4 cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class
A
Preload G
560 N
Axial stiffness
309 N/µm
Correction factors for preload calculation
Correction factor dependent on bearing series and size f
1.15
Correction factor dependent on contact angle f1
0.99
Correction factor, preload class A f2A
1
Correction factor for hybrid bearings fHC
1.02
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
2.63 kg

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