New structure design, the chain does not need lubrication oil, prolong the service life of the chain;

After the chain is loosened after use, the nut will be unscrewed and the chain will automatically tighten the most reasonable chain tightness;

Carbon brush holder structure: motor power can be increased, heat dissipation is good, and life is prolonged;

New motor structure and patented steel bracket installed inside the machine;

Effectively alleviate the influence of heat generated by the bearing, ensure that the gearbox has a long service life, and prevent loosening of the fixed machine part.