Vivifly Silver Electric Motors, Air-Cooled Spindle Kit

Vivifly's Silver Electric Motors listing is an air-cooled spindle kit with a flange and inverter. The title specifies 2.2kw, ER20, 4 pcs bearings and 0.01mm accuracy. Spindle speed changes with the frequency of the 3phase inverter output. The optional waterproof power interface has 5 pins: 1, 2 and 3 connect to the inverter's U, V and W terminals; 4 connects to GND. The source also labels pin 5.

The spindle can engrave wood, bamboo, PCB, PVC, PMMA, ABS and other nonmetals, as well as the surfaces of soft metals including gold, silver, copper, aluminium and Pb. Its bearing specification is P4 grade, with 2×7005C P4 DT and 2x7002C P4 DT, totaling 4pcs angular contact bearings. The stated coaxial degree is less than 0.0025mm.