S71904 ACD/P4A

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

These super-precision, high-capacity, 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.

They are designed to accommodate heavy loads at relatively high speeds under low to moderate operating temperatures.

  • Very high running accuracy
  • Very high load carrying capacity
  • Relatively high speed and stiffness
  • Non-contact seals
  • Integral sealing prolongs bearing service life

Dimensions

d
20 mm
 Bore diameter
D
37 mm
 Outside diameter
B
9 mm
 Width
d1
25.6 mm
 Shoulder diameter of inner ring (large side face)
d2
25.6 mm
 Shoulder diameter of inner ring (small side face)
D2
34.15 mm
 Recess diameter of outer ring (large side face)
r1,2
min.0.3 mm
 Chamfer dimension
r3,4
min.0.2 mm
 Chamfer dimension
a
11.2 mm
 Distance from side face to pressure point
Abutment dimensions - S71904 ACD/P4A

Abutment dimensions

da
min.22 mm
 Diameter of shaft abutment
da
max.25.1 mm
 Diameter of shaft abutment
db
min.22 mm
 Diameter of shaft abutment
db
max.25.1 mm
 Diameter of shaft abutment
Da
max.35 mm
 Diameter of housing abutment
Db
max.35.6 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
5.72 kN
Basic static load rating C0
3.05 kN
Fatigue load limit Pu
0.129 kN
Attainable speed for grease lubrication
40 000 r/min
Contact angle α
25 °
Ball diameter Dw
4.762 mm
Number of rows i
1
Number of balls (per bearing) z
15
Preload and stiffness (back-to-back, face-to-face)
Preload, class A GA
35 N
Axial stiffnes for preload A (sets of two brgs back to back or face to face)
51 N/µm
Preload, class B GB
70 N
Axial stiffness for preload B (sets of two brgs back-to-back or face-to-face)
65 N/µm
Preload, class C GC
140 N
Axial stiffness for preload C (sets of two brgs back-to-back or face-to-face)
85 N/µm
Preload, class D GD
280 N
Axial stiffness for preload D (sets of two brgs back-to-back or face-to-face)
113 N/µm
Correction factors for preload calculation
Correction factor dependent on bearing series and size f
1.05
Correction factor dependent on contact angle f1
0.98
Correction factor, preload class A f2A
1
Correction factor, preload class B f2B
1.04
Correction factor, preload class C f2C
1.08
Correction factor, preload class D f2D
1.14
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: S71904 ACD/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-capacity D
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 0.036 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 S71904 ACDGA/P4A

(20X37X9) (S71904ACDP4A)

Additional information

Weight 0.036 kg
Size (mm)

Colour

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