The slowest speed is given by means of a tangent screw which is carried by a ball-bearing on the flange of the telescope sleeve, whilst its nut is double-jointed to a ring that encircles the flange of the heliometer-tube.
As the " Fifties " ended, Craftsman introduced this ball-bearing headstock, 12-inch wood-turning lathe.
The speed range of the plain bearing spindle was 180 to 2000 rpm whilst the optional ball-bearing spindle ran from 230 to 3900 rpm.
Barden's high precision bearings are also having a major impact in the rapidly developing automotive aftermarket for ball bearing turbochargers.
Reassemble the parts taking great care over the seating of the ball bearing and slide the solenoid assembly back into place.