S71905 ACD/HCP4ATBTB

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

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.

  • 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 - S71905 ACD/HCP4ATBTB

Dimensions

d
25 mm
Bore diameter
D
42 mm
Outside diameter
B
27 mm
Width
d1
30.6 mm
Shoulder diameter of inner ring (large side face)
D4
39.15 mm
Recess diameter outer ring shoulder (small side face)
r1,2
min.0.3 mm
Chamfer dimension
r3,4
min.0.2 mm
Chamfer dimension
Abutment dimensions - S71905 ACD/HCP4ATBTB

Abutment dimensions

da
min.27 mm
Diameter of shaft abutment
da
max.30.1 mm
Diameter of shaft abutment
Db
max.40.6 mm
Diameter of housing abutment
ra
max.0.3 mm
Radius of fillet
rb
max.0.2 mm
Radius of fillet

Calculation data

Basic dynamic load rating C
13.8 kN
Basic static load rating C0
11.4 kN
Fatigue load limit Pu
0.355 kN
Attainable speed for grease lubrication
To be calculated: Single bearing (40000) 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 Dw
4.762 mm
Number of rows i
3
Number of balls (per bearing) z
18
Preload and stiffness (back-to-back, face-to-face)
Preload class
B
Preload G
108 N
Axial stiffness
124.7 N/µm
Correction factors for preload calculation
Correction factor dependent on bearing series and size f
1.07
Correction factor dependent on contact angle f1
0.98
Correction factor, preload class B f2B
1.07
Correction factor for hybrid bearings fHC
1.04

Description

Properties

Contact type Normal contact (two-point contact)
Number of rows 3
Ring type One-piece inner and outer rings
Design High-capacity D
Universal matching bearing No
Matched arrangement <>>
Number of bearings in matched set 3
Matched condition (axial clearance/ preload) Light preload
Tolerance class P4A
Material, bearing Hybrid (ceramic balls)
Coating Without
Sealing Seal on both sides
Sealing type Non-contact
Lubricant Grease

Logistics

Product net weight 0.115 kg
eClass code 23-05-08-03
UNSPSC code 31171531

(25X42X27) (S71905ACDHCP4ATBTB)

Additional information

Weight 0.115 kg
Size (mm)

Colour