TECHNICAL TERMS OF GENERAL MECHANICAL ENGINEERING !!

1.)FILLET – A concave surface connecting the two surfaces meeting at an angle.

2.)FLANGE– A metal part which is spread out like a rim, the action of working
a piece or part to spread out.

3.)FLANK (Side of thread) – The straight part of the thread which connects the crest with the root.

4.)INVOLUTE GEAR TOOTH – A curved tooth generated by unwinding a string from a cylinder to form the curve.

5.)JOURNAL – The part of a shaft or axle that has been machined or finished to fit into a bearing.

6.)KEYS – Metal pieces of various designs that fit into a slot in a shaft and project above the shaft to fit into a mating slot in the center hole of a gear or pulley to provide a positive drive between the shaft and the gear or pulley.

7.)LOCK NUT – A type of nut that is prevented from loosening under vibration.The locking action is accomplished by squeezing, gripping or jamming
against the bolt threads.

8.)LOOSE PULLEY – A pulley which turns freely on a shaft so that a belt can be shifted from the driving pulley to the loose pulley in order to stop a machine driven by an overhead belt drive. 

9.)QUILL – A hollow shaft that revolves on a solid shaft carrying pulleys, gears or clutches. When the clutch is closed, the quill and shaft revolve together.

10.)RACK – A straight metal strip having teeth that mesh with those of a gear to convert rotary into reciprocating motion or just the opposite.