How To Set Up A Parting Off Tool

We recommend to use a sub-spindle if available.

How to set up a parting off tool. Set of 2 HSS Trapezoid Blades 18x 34 Wide x 6 Long for Lathe Parting Cut off Tool Holders-Hard Ground. Often enough to avoid having to face it off in a second op. Heavier the better with a directly held parting tool preferably next size up for extra blade stiffness.

Use a tool with the shortest possible overhang and a secure insert clamping for best stability. Ensure the parting tool is perpendicular to the face of the chuck you can alternatively use a dial indicator. A narrow insert creates lower cutting forces and saves material.

Choose an insert geometry designed for parting-off. Alternatives to a rear tool post for better parting off are-1 Remove the top slide and mount a hefty block tool post direct on the cross slide. If the carbide cutter has an angle on it it is usually quite small.

3 Go all modern and use an insert type parting blade. If the ruler is not perpendicular to the line from tool tip to center you need to raise or lower to make it perpendicular. Even if the tool is set exactly on centre before parting these effects will tend to force the tool below centre as the work progresses.

First setting proper tool height will minimize the nib. The rear toolpost is set up for parting and chamfering. A part off tool is not a substitute for a cut off saw.

There will then be a forward component to the forces acting on the tool pulling it into the work and the backlash present will allow the tool to tend to move. When machining with long overhangs it is especially important to mount the bar correctly to ensure enough clamping contact. This video covers how to properly grind the tool how to set the tool so it is ri.