2. Why customer who ordered said 12000rpm no torque, and working not good?
A: We already contacted the customer Mager who said such problems, and finally we found this is the inverter setting problems, now he said it works well in 4000-15000rpm.
3. What is the difference between the wood working spindle and metal working spindle?
A: Metal spindle use the iron shell, so the rigidity is better. Also metal spindle is pole=4, so it have big toruque in 12000rpm than wood working spindle. If you use wood working spindle for hard metal, the inside bearings will broken in 1-2 month . But if you use metal spindle , it can works well and for a long time.