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Bearings

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Single-row Angular Contact Ball Bearings

  • These bearings are designed with three contact angle classifications as shown in Table 1.
  • Normally, contact angle A design and B design are fitted with a cage as shown in Table 2.
  • High precision (JIS/ISO class 5 or higher) may be fitted with a machined cage of bronze or phenolic resin or a polyamide cage.
    Contact angle C design are generally applied high precision, JIS (ISO) class 5 or higher, and are fitted with a machined phenolic resin cage or a polyamide cage.

Contact Angle and Characterisics of Single-row Angular Contact Ball Bearings

Contact
Angle
Symbol
Example
Bearing
No.
Contact
Angle
(α)
Speed Load capability (*2) Cross Section
Radial Load Direction(X) Axial Load
Direction (Y)
A 7205(*1) 30° Normal Normal Normal
B 7205B 40° Low Low High
C 7205C 15° High High Low

(Note)
*1: Contact angle symbol "A" is omitted.
*2: Axial load be accommodated in one direction only.


Standard Cage Materials (For JIS / ISO class 0 or 6)


Applicable Bore Diameter Number
Pressed Steel Machined Brass
72, 72B 00 - 22 24 - 40
73, 73B 00 - 19 20 - 40