-A series is a kind of crane gearbox with ratchet-pawl mechanism, so it got backstop function. This series are widely used as transmission unit in hoisting and lifting industry as well as many other fields like metallurgy and mining, cement industry, chemical machinery, etc. The gearboxes can be supplied as motor gearbox units assembled on baseplates for convenience. Electromagnetic brakes, back stops, clutches, couplings and other mechanical devices can be incorporated in the design to give a complete drive unit.

- Structures: horizontal foot-mounted with ratchet-pawl mechanism;

 

- Large transmission ratio, to drive crane at low speed;

 

- Gears made of high-quality low-carbon alloy steel 35CrMo, gear shafts made of 42CrMo, output shaft made of alloy steel 40Cr, the gearbox housing made of high-strength casting iron HT250, may also adopt better material as requested;

 

- High efficiency up to 98%per stage, low noise <70-80dB, and temperature rise <40-50℃, and high precision grade up to 6 or better of ISO1328;

 

- Gears and gear shafts through carburizing and quenching then fine profile grinding process, gearbox housing through aging treatment then annealing to relieve stress twice, therefore the bearing capacity very high;

 

- Best China bearings used on products, may apply other bearings like SKF, NSK and FAG, and double-lip oil seal make sure no oil leak;

 

- Every gearbox 100 percent tested prior to delivery;

A1960 gearbox