Genmitsu Stainless Steel GS-775M 20000RPM 775 CNC Spindle Motor with ER11 Collet Set, DC 24V, High Power, Noise Suppression, Electrical DC Motor for 3018 CNC Router Machine

Cumple muy bien su función, potencia de sobra para mi CNC y bien alineado.

Upgrade to the standard and works well

First thing I did was measure the runout. I put the motor in a vise and placed a dial indicator on the side of the collet holder (without the collet cap). Rotating by hand, the total runout is .001". This is very good. The collet holder is glued onto the motor shaft. I suspect this is because they tweak the thing until it's true. I'll bet this is why they give you a holder with the motor. You are purchasing a system. I would recommend that you never remove the holder because it'll never go back on straight. Went to install it on my cheapo 3018 and it wouldn't fit. There is a metal band on the motor, presumably so it will fit larger machines. The band simply snaps off, which allowed the motor to fit into the Z-axis bracket just fine. The diameter of the motor, without the band, is 1.65" I read all the reviews about ramping up the motor, but just for fun, I simply turned it on at full speed with the Candle interface. The motor came on without any issues. However, just for good measure, I will put the ramp-up code into the header section of the gcode generator so it's always there for all NC program files. The motor is very loud, but not because it's unbalanced or out of round. It runs at 20K RPM, so I would expect it to be loud. It isn't any louder than my Craftsman wood router. I was hesitant to purchase this motor, but since Amazon has a decent return policy, I decided to risk it. So far, I'm pleased.

Vibra demadiado, casi inusable

I bought this 20,000rpm spindle motor as the stock 9000rpm motor was barely fast enough for PCB isolation routing. Initially on first run up I was shocked at how much vibration and noise there was!! After investigation, this was not a fault of the motor and spindle itself, but the collet nut being out of balance. I STRESS to anyone experiencing big vibration on these motors that they try running it with the nut and collet removed!! Mine was very smooth with very little runout. After trying several nuts, only 2 out of 6 were acceptable (the others shook the whole machine ridiculously!). I do believe there are nuts with balance hoes available. Coupled with a home made soft start, I'm now really happy with the spindle, and making pcb's for fun!!