Scraper reducer is a special reducer produced for the coal industry, with high reliability, large bearing capacity, strong safety and other characteristics, with the role of reducing speed and increasing torque. Double record coal machine can produce reduction gear and its accessories, such as reduction gear one axis assembly, reduction gear two axis assembly, reduction gear three axis assembly, reduction gear four axis assembly.

The reducer for the gear hardness requirements are very high, so the hardness of the gear is very important. There are many heat treatment methods for gear with hard tooth surface, which should be selected according to the characteristics of planetary gear reducer.

1. Surface quenching

The common surface quenching methods are high frequency quenching and flame quenching. High frequency quenching for small size gear, flame quenching for large size gear. When the surface quenching layer including the bottom of the tooth root, the effect is the best, the