Fab Lab Skill Builder: 4-Jaw Chucksby: Andrew Grevstad
A popular tech line request is for more information about setting up a 4th axis. Earlier, we showed how to true a 4th axis to the mill motion using shims and how to set up a 3 Jaw chuck. In this new video, Mike C. demonstrates how to set up a 4-Jaw chuck on a 4th axis. He also shows basic tail stock setup.
A 4 Jaw chuck with independent jaws like the one shown in this video takes some care (and a little patience) to setup properly, as you’ll see from this video. That seems to be why most machinists will do whatever they can to use a 3 Jaw chuck if the part permits – for example, starting with round bar stock to begin with, or turning or milling down a round stub end on a square workpiece so it can be gripped with a 3 Jaw chuck.
As a rule, it usually makes a lot of sense to program any 4th axis work as the first setup in a multi-setup program. This is because its a lot easier to reference a part for a second operation setup if you only need to worry about alignment of 3 axes.
Of course, that’s not always possible, and that’s what makes a 4 Jaw chuck so useful:)
More Tormach Fab Lab Videos:
- Toolmaker Vises Tips
- How to use a Coaxial Indicator
- Fixture Plate Basics
- Getting Started with Tension/Compression Tapping
- Getting Started with Auto-Reversing Tapping
- How to Swing Indicate a Square
- How to Swing Indicate a Circle
- How to Bore an OD
- How to Bore an ID
- How to Use a Sine Vise
- Tips for using Strap Clamps
- How to Square a Block
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