7028 ACDGA/P4ASuper-precision, high-capacity, universally matchable single row angular contact ball bearing

SKU: 7028 ACDGA/P4ASuper-precision, high-capacity, universally matchable single row angular contact ball bearing

These super-precision, high-capacity, single row angular contact ball bearings accommodate radial and axial loads acting simultaneously, where the axial load acts in one direction only. They are designed to accommodate heavy loads at relatively high speeds under low to moderate operating temperatures. Being universally matchable, they can be used together in arrangements to provide effective load sharing, within a predetermined preload range, without the use of shims or similar devices.

ID:141450

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

Dimensions - 7028 ACDGA/P4A

Dimensions

d
140 mm
Bore diameter
D
210 mm
Outside diameter
B
33 mm
Width
d1
161.6 mm
Shoulder diameter of inner ring (large side face)
d2
161.6 mm
Shoulder diameter of inner ring (small side face)
D1
188.4 mm
Shoulder diameter of outer ring (large side face)
r1,2
min. 2 mm
Chamfer dimension
r3,4
min. 1 mm
Chamfer dimension
a
57.5 mm
Distance from side face to pressure point

Abutment dimensions - 7028 ACDGA/P4AAbutment dimensions - 7028 ACDGA/P4A

Abutment dimensions

da
min. 149 mm
Diameter of shaft abutment
db
min. 149 mm
Diameter of shaft abutment
Da
max. 201 mm
Diameter of housing abutment
Db
max. 205 mm
Diameter of housing abutment
ra
max. 2 mm
Radius of fillet
rb
max. 1 mm
Radius of fillet
dn
166.3 mm
Position of oil nozzle

Calculation data

Basic dynamic load rating C
146 kN
Basic static load rating C0
156 kN
Fatigue load limit Pu
5.1 kN
Attainable speeds
Contact SKF for the attainable speeds
Contact angle α
25 °
Ball diameter Dw
22.225 mm
Number of rows i
1
Number of balls (per bearing) z
22
Reference grease quantity (per bearing) Gref
45 cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class
A
Preload when unmounted G
900 N
Axial stiffness
364 N/µm
Correction factors for preload calculation
Correction factor dependent on bearing series and size f
1.16
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
Limiting value 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
3.42 kg

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