X-Y Ball Screw Kit for Bridgeport Mills. Easily replace your old ACME screws with precision ball screws. This kit comes with X and Y ball screws, a pair of zero backlash double ball nuts and a yoke designed specifically for the Bridgeport machines.
Rockford Ball Screw manufactures preloaded ball screw kits for Bridgeport standard Series 1 mills and Knee Mill clones. Bridgeport Retrofit Kits Offer Many Convenient Features: High-Capacity, Long-Life: Each ball nut assembly of the Rockford preloaded unit has one circuit of 3 1/2 turns of ball bearings.