Manual Lathe Setup

Just as we learned on the manual knee mill in semester 1, the processes and accuracy we maintain during setup of the Engine Lathe is paramount to our success at being able to machine parts to specification on the lathe.

This page will detail setup processes that will be learned during Semester 2 while completing turning operations on the manual engine lathe.

Manual Lathe Work Holding - Chucks

The chuck is used on the Manual Engine Lathe as the device which holds and locates our workpiece or material. While there are numerous types and styles of chucks used on the lathe, apprentices will learn how to use the 3-Jaw Universal Chuck and the 4-Jaw Independent Chuck during semester 2.

We will use dial indicators to inspect the chucks and spindles on the lathes at Auburn prior to performing any of the turning operations. The video below shows how to indicate and adjust the 4-Jaw Independent vise to the desired runout. We will use a similar setup to indicate the chuck body prior to mounting and checking material runout.

Tail Stock Alignment

The tail stock is used to support the end of the workpiece opposite the spindle or chuck. Tailstocks should be used when the length to diameter ratio of the workpiece is greater than 3:1. This means that if the length is 3 or more times the diameter of the workpiece, we should always use a tailstock to support the workpiece's free end.

To accurately use a tailstock, we must ensure that the tailstock is aligned with the spindle or chuck. Misalignment of the tailstock with the chuck will cause turned diameters to be tapered rather than straight. Watch the below video to see one way we can determine if the tailstock is misaligned with the spindle and how we can realign the tailstock. The video below shows one setup for adjusting the tailstock into alignment with the spindle. Watch video from 12:36 to 26:00 minutes to see the process.