Worm gears are used when large gear reductions are needed. It is common for worm gears to have got reductions of 20:1, and even up to 300:1 or greater.
Many worm gears have an interesting property that no additional gear arranged has: the worm can simply turn the gear, but the gear cannot turn the worm. That is because the angle on the worm is so shallow that when the apparatus tries to spin it, the friction between the equipment and the worm keeps the worm in place.
This feature pays to for machines such as for example conveyor systems, in which the locking feature can become a brake for the conveyor when the motor is not turning. One other very interesting utilization of worm gears can be in the Torsen differential, which can be used on some high-performance vehicles.
PRODUCT INTRODUCTION:
MAIN FEATURES:
1) Made of high quality aluminum alloy, light weight and non-rusting
2) Large output torque and high radiating efficiency 3) Smooth running and low noise, can work long time in dreadful condition
4) Good-looking appearance, durable service life and small volume
5) Suitable for omnibearing installation
MAIN MATERIALS:
1)housing: aluminium alloy ADC12(size worm gear 025-090); die cast iron HT200(size 110-150);
2)Worm:20Cr, ZI Involute profile; carbonize&quencher heat treatment make gear surface hardness up to 56-62 HRC; After precision grinding, carburization layer’s thickness between 0.3-0.5mm.
3)Worm Wheel:wearable stannum alloy CuSn10-1
We started our business from 1995 and now we are the one of the leader manufacturer of power transmission products. It focuses mainly on Keyless Locking Devices, Timing Belt Pulleys, Roller Chains, Bearing, Jaw Couplings, Gears and other parts.
These products are produced in conformity with the International Standard and the standards adopted in 
industrialized countries (DIN ANSI BS JIS) with up to data equipment, advanced technology and perfect management system for quality control. It boasts a team with rich experience in this industry, focusing on global market. So the products are of good quality with competitive prices.