Exam 21: Bearings

A metric thread with a diameter of ten millimeters would be designated on a drawing as ____________________.

All rotating machinery parts are supported by bushings.

Bearings are classified as plain bearings and _________________________ bearings.

HEX. Is the abbreviation for hexagon.

The most common types of plain bearings are journal (sleeve) bearings and ____________________ bearings.

Journal bearings are usually made of cast or porous ____________________.

If there is no depth indicated, the symbol calls for a spotface.

In the thread note .562-12 UNC-2B, the B indicates an internal thread.

UNC stands for ____.

When using a journal or sleeve bearing, the shaft should be softer than the bearing material in order to minimize bearing wear.

The abbreviation for REQUIRED is ____.

Ball, roller, and needle bearings are classified as ____ bearings.