Some gears

a. Machine tool gear
The gear machine undertakes the transmission power, change exercising speed and direction of motion task. Generally the gears precision machine tools mostly rank 7 precision, in only his degrees transmission mechanism of demand higher accuracy.
Machine tool gear working conditions than mining machinery, mechanical power of gear is still belongs to smooth running, load quite, conditions are relatively good category. Practice has proved, general machine tool gear manufacturing, and the selection medium-carbon steel high-frequency induction heat treatment, have been the hardness, wear resistance, strength and toughness can meet demands, and counties frequency quenching has little deformation, productivity high yield.
b. Automobiles, tractors gear
Automobiles, tractors gear main repacking in gearbox and differential, in gearbox, through which to change the engine, and shaft and spindle of gear ratio, The differential, through the gears to increase reverse force major and regulate control two the wheel speed, through the power of the engine gear will be uploaded to active wheels of automobiles, tractors, flooding operation. Automobiles, tractors gear working conditions than machine tool gear to much more onerous, trapped in this wearability, fatigue strength, the core strength and impact toughness requirements are better than machine tool gear for high. Practice has proved, automobile and tractor gear choose carburizing steels manufacturing and approved by carburizing use after heat treatment is relatively close appropriate.