0.5 module copper worm shaft bore 3 mm diameter 6.7 mm Seat & Posture Cushions practical and versatile

practical and versatile

texture and glamour to bedroom or pavilion

Geomancer and astronomy compass for feng shui

Unique appearance and the beautiful pattern

travelling etc

0.5 module copper worm shaft bore 3 mm diameter 6.7 mm Seat & Posture Cushions practical and versatileITEM NAME: 0. 5 module copper worm shaft bore 3 mm diameter 6. 7 mm Description: Made of brass, long time service. The transmission structure of worm shaft is simple, compact, small volume and light weight. Worm Shaft Z1=1, turn a round of worm gear teeth, can get a large transmission ratio, generally in the power transmission, the transmission ratio I=10 80, like big transmission ratio, if use with gear transmission, will need to take the multi stage