Matching a Tailstock to Your Rotary Table

Introduction

When machining long-shaft workpieces, a rotary table alone is often insufficient. A tailstock provides essential support at the other end of the workpiece to prevent deflection and vibration.

1. The Golden Rule: Center Height Must Match

The most critical factor in selecting a tailstock is the center height. It must exactly match the center height of your rotary table. For example, if your table has a center height of 135mm, you must use a tailstock with a 135mm center height. Mismatched heights will cause the workpiece to tilt, ruining accuracy.

2. Types of Tailstocks

Manual Thimble Tailstock: Operator adjusts the quill manually using a handwheel. Best for low-volume or varied setups.

Disc Tailstock: Utilizes a disc structure, often offering higher rigidity and clamping force for heavier workpieces.

3. Installation and Alignment

Always align the tailstock with the rotary table using a test bar and dial indicator before clamping down. Ensure the T-slot bolts are securely tightened to prevent shifting during heavy cuts.

Conclusion

A properly matched tailstock transforms your 4th axis into a complete turning and indexing solution. Ensure you check the center height before purchasing.