S71908 ACB/P4A

Super-precision, high-speed B design, single row angular contact ball bearing with seals

These super-precision, high-speed, single row angular contact ball bearings, with 25° contact angle, with seals, accommodate radial and axial loads acting simultaneously, where the axial load acts in one direction only.

Compared to the equivalent SKF E design high-speed bearings, these are suited for lighter loads.

  • Very high running accuracy
  • Accommodate high speeds
  • Reduced stresses on rolling contact surfaces
  • Non-contact seals
  • Integral sealing prolongs bearing service life

Dimensions

d
40 mm
 Bore diameter
D
62 mm
 Outside diameter
B
12 mm
 Width
d1
48.46 mm
 Shoulder diameter of inner ring (large side face)
d2
47.6 mm
 Shoulder diameter of inner ring (small side face)
D2
55.64 mm
 Recess diameter of outer ring (large side face)
r1,2
min.0.6 mm
 Chamfer dimension
r3,4
min.0.3 mm
 Chamfer dimension
a
18 mm
 Distance from side face to pressure point
Abutment dimensions - S71908 ACB/P4A

Abutment dimensions

da
min.43.2 mm
 Diameter of shaft abutment
da
max.47.9 mm
 Diameter of shaft abutment
db
min.43.2 mm
 Diameter of shaft abutment
db
max.47 mm
 Diameter of shaft abutment
Da
max.58.8 mm
 Diameter of housing abutment
Db
max.60 mm
 Diameter of housing abutment
ra
max.0.6 mm
 Radius of fillet
rb
max.0.3 mm
 Radius of fillet

Calculation data

Basic dynamic load rating C
5.07 kN
Basic static load rating C0
3.9 kN
Fatigue load limit Pu
0.166 kN
Attainable speed for grease lubrication
28 000 r/min
Contact angle α
25 °
Ball diameter Dw
3.969 mm
Number of rows i
1
Number of balls (per bearing) z
28
Preload and stiffness (back-to-back, face-to-face)
Preload, class A GA
31 N
Axial stiffnes for preload A (sets of two brgs back to back or face to face)
65 N/µm
Preload, class B GB
62 N
Axial stiffness for preload B (sets of two brgs back-to-back or face-to-face)
83 N/µm
Preload, class C GC
185 N
Axial stiffness for preload C (sets of two brgs back-to-back or face-to-face)
124 N/µm
Correction factors for preload calculation
Correction factor dependent on bearing series and size f
1.06
Correction factor dependent on contact angle f1
0.99
Correction factor, preload class A f2A
1
Correction factor, preload class B f2B
1.02
Correction factor, preload class C f2C
1.07
Correction factor for hybrid bearings fHC
1
Factors for equivalent bearing load calculation
Limiting value e
0.68
Axial load factor (single, tandem) Y2
0.87
Axial load factor (single, tandem) Y0
0.38
Radial load factor (single, tandem) X2
0.41
Axial load factor (back-to-back, face-to-face) Y1
0.92
Axial load factor (back-to-back, face-to-face) Y2
1.41
Axial load factor (back-to-back, face-to-face) Y0
0.76
Radial load factor (back-to-back, face-to-face) X2
0.67
Add to Enquiry
SKU: S71908 ACB/P4A-SKF Categories: , , , ,
SKF

Description

Properties

Contact type Normal contact (two-point contact)
Number of rows 1
Ring type One-piece inner and outer rings
Design High-speed B
Universal matching bearing No
Matched arrangement No
Matched condition (axial clearance/ preload) Not applicable
Tolerance class P4A
Material, bearing Bearing steel
Coating Without
Sealing Seal on both sides
Sealing type Non-contact
Lubricant Grease

Logistics

Product net weight 0.122 kg
eClass code 23-05-08-04
UNSPSC code 31171531

Aftermarket replacement

Super-precision, high-speed, B design, universally matchable single row angular contact ball bearing with seals S71908 ACBGA/P4A

(40X62X12) (S71908ACBP4A)

Additional information

Weight 0.122 kg
Size (mm)

Colour

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