7220 CD/P4AQFCDMatched set of four super-precision, high-capacity, D design, single row angular contact ball bearings

SKU: 7220 CD/P4AQFCDMatched set of four super-precision, high-capacity, D design, single row angular contact ball bearings

These sets of four matched super-precision angular contact ball bearings are available as universally matchable bearings or in preconfigured arrangements. Sets of four bearings arranged in tandem need to be mounted against a single bearing, or a set of bearings in tandem, to achieve the desired preload. All the other arrangements are available in different preload classes and correct mounting results in preload within a predetermined range, without the need for shims or similar devices. The bore and outside diameters of the bearings are matched to within a maximum of one-third of the permitted diameter tolerance, to provide better load distribution than single universally matchable bearings.

ID:131747

Universal matching bearing(s)
No

Dimensions - 7220 CD/P4AQFCD

Dimensions

d
100 mm
Bore diameter
D
180 mm
Outside diameter
B
136 mm
Width
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

Abutment dimensions - 7220 CD/P4AQFCDAbutment dimensions - 7220 CD/P4AQFCD

Abutment dimensions

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

Calculation data

Basic dynamic load rating C
410 000 N
Basic static load rating C0
540 000 N
Fatigue load limit Pu
19 600 N
Attainable speeds
Contact SKF for the attainable speeds
Contact angle α
15 °
Ball diameter Dw
25.4 mm
Number of rows i
4
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
D
Preload G
9 440 N
Axial stiffness
662 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 D f2D
1.05
Correction factor for hybrid bearings fHC
1

Mass

Mass
13 kg

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