S71911 CD/P4ATBTAMatched set of three super-precision, high-capacity, D design, single row angular contact ball bearings with seals

S71911 CD/P4ATBTAMatched set of three super-precision, high-capacity, D design, single row angular contact ball bearings with seals

SKU: S71911 CD/P4ATBTAMatched set of three super-precision, high-capacity, D design, single row angular

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:144537

Technical Data
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Universal matching bearing(s)

No

Dimensions

d	55 mm	Bore diameter
D	80 mm	Outside diameter
B	39 mm	Width
d₁	62.7 mm	Shoulder diameter of inner ring (large side face)
D₄	76.62 mm	Recess diameter outer ring shoulder (small side face)
r_1,2	min. 1 mm	Chamfer dimension
r_3,4	min. 0.3 mm	Chamfer dimension

Abutment dimensions

d_a	min. 59.6 mm	Diameter of shaft abutment
d_a	max. 62.1 mm	Diameter of shaft abutment
D_b	max. 78 mm	Diameter of housing abutment
r_a	max. 1 mm	Radius of fillet
r_b	max. 0.3 mm	Radius of fillet

Calculation data

Basic dynamic load rating	C	41 600 N
Basic static load rating	C₀	44 000 N
Fatigue load limit	P_u	1 860 N
Attainable speeds		Contact SKF for the attainable speeds
Contact angle	α	15 °
Ball diameter	D_w	7.938 mm
Number of rows	i	3
Number of balls (per bearing)	z	23

Preload and stiffness (back-to-back, face-to-face)
Preload class		A
Preload	G	94.5 N
Axial stiffness		71.05 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	1
Correction factor, preload class A	f_2A	1
Correction factor for hybrid bearings	f_HC	1

Mass

Mass

0.55 kg

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