all of drive roller are made of high quality steel with temper and quenching treatment , not change shape when high speed running ,hard chrome plated the surface with grinded
Machine transmission parts (shaft, gear joint) are adopted free key connection (LOCK-ALX), the connection eliminate clearance.It is suitable for long-term high speed with high torque.The engine drive gear is adopted 20CrMnTi alloy steel, carburizing,quenching treatment, hardness HRC58-62 and gear grinding processing precision level 6, and ensured the long-term use of tinted with high precision.