S71911 ACD/P4AQBCC

S71911 ACD/P4AQBCC

Matched set of four super-precision, high-capacity, D design, single row angular contact ball bearings with seals

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.

Very high running accuracy
High axial and radial stiffness
High axial and radial load carrying capacity
Non-contact seals
Integral sealing prolongs bearing service life

Dimensions

d	55 mm	Bore diameter
D	80 mm	Outside diameter
B	52 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	48.8 kN
Basic static load rating	C₀	55 kN
Fatigue load limit	P_u	2.36 kN
Attainable speed for grease lubrication		To be calculated: Single bearing (15000) x speed reduction factor (see table below)
Attainable speed for oil-air lubrication		To be calculated: Single bearing () x speed reduction factor (see table below)
Contact angle	α	25 °
Ball diameter	D_w	7.938 mm
Number of rows	i	4
Number of balls (per bearing)	z	23

Preload and stiffness (back-to-back, face-to-face)
Preload class		C
Preload	G	960 N
Axial stiffness		422 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	0.98
Correction factor, preload class C	f_2C	1.08
Correction factor for hybrid bearings	f_HC	1

Description

Properties

Contact type	Normal contact (two-point contact)
Number of rows	4
Ring type	One-piece inner and outer rings
Design	High-capacity D
Universal matching bearing	No
Matched arrangement	<<>>
Number of bearings in matched set	4
Matched condition (axial clearance/ preload)	Moderate preload
Tolerance class	P4A
Material, bearing	Bearing steel
Coating	Without
Sealing	Seal on both sides
Sealing type	Non-contact
Lubricant	Grease
Indicative product carbon footprint to manufacture	2.58 kg CO₂e

Logistics

Product net weight	0.716 kg
eClass code	23-05-08-04
UNSPSC code	31171531

Aftermarket replacement

Super-precision, high-capacity, universally matchable single row angular contact ball bearing with seals

4 x S71911 ACDGC/P4A
Verify quantity of bearing rows

(55X80X52) (S71911ACDP4AQBCC)

Additional information

Weight	0.716 kg
Size (mm)	90.000×140.000×24.000
Colour	BLUE