7044 ACD/P4ATBTBMatched set of three super-precision, high-capacity, D design, single row angular contact ball bearings

SKU: 7044 ACD/P4ATBTBMatched set of three super-precision, high-capacity, D design, single row angular contact ball bearings

These sets of three matched super-precision angular contact ball bearings are available as universally matchable bearings or as preconfigured arrangements. Sets arranged in back-to-back and tandem, or face-to-face and tandem, are available in different preload classes and correct mounting results in preload within a predetermined range, without the need for shims or similar devices. Sets of three bearings paired in tandem need to be mounted against a single bearing, or another set of bearings in tandem, to achieve the desired preload. 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:146087

Universal matching bearing(s)
No

Dimensions - 7044 ACD/P4ATBTB

Dimensions

d
220 mm
Bore diameter
D
340 mm
Outside diameter
B
168 mm
Width
d1
257 mm
Shoulder diameter of inner ring (large side face)
r1,2
min. 3 mm
Chamfer dimension
r3,4
min. 1.5 mm
Chamfer dimension

Abutment dimensions - 7044 ACD/P4ATBTBAbutment dimensions - 7044 ACD/P4ATBTB

Abutment dimensions

da
min. 233 mm
Diameter of shaft abutment
Db
max. 334 mm
Diameter of housing abutment
ra
max. 2.5 mm
Radius of fillet
rb
max. 1.5 mm
Radius of fillet
dn
267.1 mm
Position of oil nozzle

Calculation data

Basic dynamic load rating C
689 000 N
Basic static load rating C0
1 320 000 N
Fatigue load limit Pu
33 500 N
Attainable speeds
Contact SKF for the attainable speeds
Contact angle α
25 °
Ball diameter Dw
38.1 mm
Number of rows i
3
Number of balls (per bearing) z
21
Reference grease quantity (per bearing) Gref
201 cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class
B
Preload G
5 400 N
Axial stiffness
1 029.5 N/µm
Correction factors for preload calculation
Correction factor dependent on bearing series and size f
1.13
Correction factor dependent on contact angle f1
0.99
Correction factor, preload class B f2B
1.02
Correction factor for hybrid bearings fHC
1

Mass

Mass
48.2 kg

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