jto/b10/b12/b16 electric drill no power spindle assembly diy woodworking cutting sliding small rotary bench trim belt boor chuck

characteristics: 100% new and made of solid metal, the spider is durable and has good performance. spider is processed with a grinding machine for high precision of 0.005mm. large part around diy drill press, table grinder, table saw etc. specifications: material: stock steel nominal train number: 7000 rpm max. speed temperature increase: 60 dynamic balance: 0.1 mg max. speed noise: 2db kegel gat slinger: 0.001mm precision: 0.005mm chuck capacity: jto: 0.3-4mm b10: 0