TECHNICAL TERMS OF MACHINE COMPONENTS AND ATTACHMENTS EXPLAINED !!

1.)BACK GEARS – Gears applied to machine tools to increase the number of speed changes obtainable with a cone or step pulley belt drive.

2.)BASTERED THREAD – A screw thread which does not confirm to any recognized standard dimensions.

3.)BOLSTER – Support for dies and tools in forging presses and drop stamps.

4.)COLLET – Means of gripping a bar to give quicker chucking, particularly in capstan work for rapid and accurate setting.

5.)CLAMP – Device for holding work during marking out, measuring,machining, fitting or grinding.

6.)DEMAGNETIZER – Device for removing permanent magnetism from steel tools and parts.

7.)DIE HEAD – Device to enable small or medium sized work to be screwed in capstan or turret lathes. The die head consists of a cylindrical body with a shank to enable it to be clamped in the turret.

8.)DRILL SLEEVE – A steel part tapered inside and outside which fits onto the tapered shank of a cutting tool, such as a drill or reamer, to adapt it to the size of the hole in the drill press spindle.

9.)HALF NUT – A mechanism attached to the apron of a lathe and operated
by a lever. The lever opens and closes a nut that has been split lengthwise
so that the two halves of the nut can be closed upon the lead screw
when threads are being cut. Also called SPLIT NUT.

10.)INDEX PLATE – A thin circular plate having various circles of holes. It is
attached to the index head and used for obtaining fractional parts of a turn of the index crank. A set of three or more index plates may be furnished for an index head.