What lead error is present in the lifting screw threads?
1800 and 9000, 2500, 2555, 2625 or 4800 and 9400 Series lift screws have .002″ to .010″ per foot lead error. It is cumulative and not detrimental to the operation of the actuator model. 2800 and 9800 Series – This is a heat treated rolled ball track with a lead error of plus or minus .009″ per foot cumulative. How do you compute the raise per minute with a given worm shaft speed? When the worm shaft speed is known, the distance the load can be raised per minute can be determined with this formula: Raise per minute = RPM of Worm Shaft /Turns of worm for I” raise (Worm turns for 1″ raise are shown in actuator specifications in the Actuator Design Guide (request publication 2003).
