Description of the application
The threaded nut is used for height adjustment of a work table. The housing is made of a machined steel pipe. The
spindle is made of free machining steel, with a surface roughness of Ra=0.8µm.
The long-term load is 1.000N with a spindle speed of n=23 rpm. Additionally, every 180s for a time of 120s, an axial load of 2.000N (total 3.000N) takes place on the spindle nut. Then the cycle starts all over again. The ambient temperature varies between -5°C and +40°C.
For the motion nut, a material with low wear and also maintenance-free was required.
For this application a motion nut made of ZX-100K with a trapezoidal thread TR28 x 3 and a length of 30mm was used.
Field tests with an incremented load and a duty cycle of 100% have shown that the motion nut subjected to these parameters, and after the required working life, has signs neither of wear nor of plastic deformation. It has been used as standard feature since 1996.
Maintenance, cost reduction