Bridgeport Knee Mill Ballscrew Upgrade | eBay
BRIDGEPORT / KNEE MILL BALL SCREW SET, 12" x 42" w/ YOKE, PRECISION GROUND ~NEW~ £1, + PP . Ballscrew 20mm C7 5mm Pitch SFU2005 36" Lenght Cnc Mill Lathe Machine Router. £ ... the ball screw and ball nut assembly, the motor and ball screw pulleys, the motor cover, all needed bolts and spacers.