Turned, ground, and polished
FINISHING PROCESS FOR METAL SHAFTING
Turned, Ground, and Polished; Turned, ground and polished
Turned, ground, and polished (TGP) is a classification of finishing processes often used for metal shafting. Turning (on a lathe) creates straight round bars without the strain induced by cold drawing, while grinding and polishing improves the surface finish and roundness for high dimensional accuracy.