SKF Bearing 71909 ACB/P4A

d=45.0mm, D=68.0mm, B=12.0mm, Mass bearing=0.13kg
Material: Bearing steels
In Stock:
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Specifications of SKF Bearing 71909 ACB/P4A

SKF Bearing 71909 ACB/P4A


d 45.0mm Bore diameter
D 68.0mm Outside diameter
B 12.0mm Width
d1 53.45mm Shoulder diameter of inner ring (large side face)
d2 52.4mm Shoulder diameter of inner ring (small side face)
D2 61.8mm Recess diameter of outer ring (large side face)
r1,2 0.6mm Chamfer dimension (large side face)
r3,4 0.3mm Chamfer dimension (small side face)
a 19.3mm Distance from side face to pressure point
SKF Bearing 71909 ACB/P4A
SKF Bearing 71909 ACB/P4A

Abutment dimensions

da 48.2mm Diameter of shaft abutment
db 48.2mm Diameter of shaft abutment
Da 64.8mm Diameter of housing abutment
Db 66.0mm Diameter of housing abutment
ra 0.6mm Radius of fillet
rb 0.3mm Radius of fillet
dn 54.2mm Position of oil nozzle

Calculation data

Basic dynamic load rating C 7.02kN
Basic static load rating C0 5.5kN
Fatigue load limit Pu 0.232kN
Attainable speed for grease lubrication 24000.0r/min
Attainable speed for oil-air lubrication 38000.0r/min
Contact angle u03b1 25.0u00b0
Ball diameter Dw 4.762mm
Number of balls z 27.0
Reference grease quantity Gref 1.75cmu00b3


Mass 0.13kg

Product description of SKF Bearing 71909 ACB/P4A

SKF Bearing 71909 ACB/P4A, It belongs to SKF Bearing > Super-precision bearings > Angular contact ball bearings > Super-precision.SKF Bearing 71909 ACB/P4A, SKF manufactures super-precision angular contact ball bearings for shaft diameters from 6 to 360 mm. Application requirements vary, and as a result, the SKF assortment of super-precision angular contact ball bearings includes four ISO dimension series, in numerous executions. The wide selection of designs and variants enables them to be incorporated into virtually every machine tool application as well as other applications where precision bearings are required.

SKF Bearing 71909 ACB/P4A, Single row SKF super-precision angular contact ball bearings are non-separable and, like all angular contact ball bearings, have raceways in the inner and outer rings that are displaced relative to each other in the direction of the bearing axis. This means that in addition to radial loads, these bearings can also accommodate axial loads in one direction. Radial loads induce axial forces in these bearings that need to be balanced by counter-forces. An angular contact ball bearing is, therefore, always adjusted against a second bearing or used in sets.

The ring shoulders can have a different height on one or both bearing rings. Every bearing has the largest possible number of balls, which are guided by a window-type cage. The SKF assortment of super-precision angular contact ball bearings includes bearings in the following dimension series: Ultra light 718 series Extremely light 719 series Light 70 series Robust 72 series

SKF Bearing 71909 ACB/P4A, The cross sections of the four bearing series are compared for the same bore and same outside diameters. Each bearing series has characteristic features that make it particularly suitable for certain bearing applications.

Super-precision angular contact ball bearings are manufactured with the following contact angles (fig. 3): A 15° contact angle, designation suffix C A 25° contact angle, designation suffix AC For S70 W series bearings, the contact angle is 18° (designation suffix F). For other series, bearings with an 18° contact angle (designation suffix F), are available on request. A larger contact angle provides a higher degree of axial stiffness and a higher axial load carrying capacity. However, speed capability, radial stiffness, and radial load carrying capacity are reduced.

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