The end-over-end rotation of an unstable projectile in flight. Sometimes referred to as Bullet Tipping or Keyholing.

(1) The process for removing scale from forgings in a rotating container by means of impact with each other and abrasive particles and small bits of metal. (2) A process for removing scale and roughness from forgings by impact with each other, together with abrasive material in a rotating container.

Bulk processing in barrels, either in the presence or absence of abrasives or burnishing shot, for the purpose of improving the surface finish. Vapour blasting : See wet blasting.

is a pre-finish that takes place in a rotating barrel with abrasive medium.

moving in surges and billows and rolls; "billowing smoke from burning houses"; "the rolling fog"; "the rolling sea"; "the tumbling water of the rapids"

pitching headlong with a rolling or twisting movement; "a violent tumbling fall"

Forward or backward rolls, inverted skills and flips.

Rolling in a revolving container to remove sharp edges and improve finish.

the gymnastic moves of an acrobat

Any gymnastics or acrobatic skill executed on the performing surface.

Any gymnastic or acrobatic skill executed on the performing surface.

A process in which tanned hides are placed in drums with heat and water and tumbled to a desired softness. Also call “milling”.

Process of softening leather for added comfort.

The mechanical process that softens, removes water and enhances the grain of the hides.