7220 CD/P4ASuper-precision, high-capacity, single row angular contact ball bearing

SKU: 7220 CD/P4ASuper-precision, high-capacity, single row angular contact ball bearing

These super-precision, high-capacity, single row angular contact ball bearings, with 15° contact angle, 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.

ID:131734

Universal matching bearing(s)
No

Dimensions - 7220 CD/P4A

Dimensions

d
100 mm
Bore diameter
D
180 mm
Outside diameter
B
34 mm
Width
d1
124.7 mm
Shoulder diameter of inner ring (large side face)
d2
124.7 mm
Shoulder diameter of inner ring (small side face)
D1
155.3 mm
Shoulder diameter of outer ring (large side face)
r1,2
min. 2.1 mm
Chamfer dimension
r3,4
min. 1.1 mm
Chamfer dimension
a
35.9 mm
Distance from side face to pressure point

Abutment dimensions - 7220 CD/P4AAbutment dimensions - 7220 CD/P4A

Abutment dimensions

da
min. 112 mm
Diameter of shaft abutment
db
min. 112 mm
Diameter of shaft abutment
Da
max. 168 mm
Diameter of housing abutment
Db
max. 173 mm
Diameter of housing abutment
ra
max. 2 mm
Radius of fillet
rb
max. 1 mm
Radius of fillet
dn
131.4 mm
Position of oil nozzle

Calculation data

Basic dynamic load rating C
156 kN
Basic static load rating C0
137 kN
Fatigue load limit Pu
4.9 kN
Attainable speed for grease lubrication
7 500 r/min
Attainable speed for oil-air lubrication
12 000 r/min
Contact angle α
15 °
Ball diameter Dw
25.4 mm
Number of rows i
1
Number of balls (per bearing) z
15
Reference grease quantity (per bearing) Gref
40.899 cm³
Preload and stiffness (back-to-back, face-to-face)
Preload, class A GA
590 N
Axial stiffnes for preload A (sets of two brgs back to back or face to face)
122 N/µm
Preload, class B GB
1 180 N
Axial stiffness for preload B (sets of two brgs back-to-back or face-to-face)
165 N/µm
Preload, class C GC
2 360 N
Axial stiffness for preload C (sets of two brgs back-to-back or face-to-face)
230 N/µm
Preload, class D GD
4 720 N
Axial stiffness for preload D (sets of two brgs back-to-back or face-to-face)
331 N/µm
Correction factors for preload calculation
Correction factor dependent on bearing series and size f
1.09
Correction factor dependent on contact angle f1
1
Correction factor, preload class A f2A
1
Correction factor, preload class B f2B
1.01
Correction factor, preload class C f2C
1.03
Correction factor, preload class D f2D
1.05
Correction factor for hybrid bearings fHC
1
Factors for equivalent bearing load calculation
Calculation factor for equivalent loads f0
14.5
Additional factors for equivalent loads
Refer to Notes 1 and 2 below

Mass

Mass
3.24 kg

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