Since single row angular contact ball bearings

have a contact angle they can sustain

significant axial loads in one direction together

with radial loads. Because of their design two

opposed bearings or a combination of more

than two bearings must be used.

Three series of super precision bearings are

available, ISO series 19, 10 and 02, with

preferred contact angles of 15

º and 25º (fig. 1).

The standard cage is laminated phenolic resin

which is outer ring guided. The material and

design provide for high speed and quiet

running.

The many combinations of contact angle and

preload allow precise selection to cope with the

most arduous requirements of speed and

Dimensions

RHP Super Precision bearings are made in

accordance with the International Standards

Organisation’s dimension plans. Full details

are given in the bearing

Tables 8-10 on pages

14-19.

The tolerances adopted conform to

internationally recognised standards as

shown in

Table 1.

Precision grade P3 is an intermediate

precision grade offering P2 runout tolerances

with P4 external tolerances