30mm Spindle Quill Return Clock Spring For Bridgeport Series I Milling Machine – B178 Compatible

If the quill on your Bridgeport milling machine isn't retracting smoothly anymore, that return spring might be tired or broken.

This is a replacement clock spring, often referred to as part B178.

It's a 30mm size designed to fit Bridgeport Series I and similar mills.

It gives the quill that positive return action you need for efficient drilling and milling.

It's a brand new, unbranded part made to get your machine working right again.

Whether you have a manual, CNC, or semi-automatic setup, this spring is a key component.

A simple fix for a common problem on a classic machine.