A tool post grinder will align grind the upper & lower holes in a connecting rod after tempering; grind liner tapers; and grind hardened steel front ends. The J-45 Themac grinder uses one spindle for ID & OD grinding. The spindle runs from 4,200 to 42,000 rpm & uses wheels from .125 to 5.0 inches in dia or borazon pins as small as .031 dia. The unit has a unique feature that allows the spindle to rotate around the motor housing. With this feature the center line of the spindle can be placed on the center line of the lathe, allowing very small ID diameters to be ground easily.
