... 2.good abrasion resistance&hardness 3.high precision 4.good strength 5.excellent sintered gear wheel 1.Good quality raw( ... machining strict inspection.2. Specifications We make gear wheel , shaft, gearbox . We make High Precision gear, gear wheel , shaft, gearbox . 3. We ... and so on. 5. Heat Treatment: Hardening and Tempering, High Frequency Quenching, Carburizing Quenching and so on. 6. Surface ...