GS-775M 20000RPM 775 CNC Spindle Motor with 5mm ER11 Collet Set, CNC 3018 Upgraded Accessories, DC 24V, High Power, Noise Suppression, Electrical DC Motor for 3018 CNC Router Machine

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.

The media could not be loaded. I've had my 3018 for a few years now and have used it a ton. I finally pulled the trigger and upgraded to the 20K spindle.Motor came 100% ready to go.Installed it and immediately wrote basic program in pic I added. Had to adjust some parameters and it worked flawless and smooth right away.Did 3 paw programs to test it out.SUPER HAPPY and can't wait to push the limits!Yes it is a bit louder than the slower stock motor but it's also spinning 2x's faster!

Spindle gives excellent performance compared to the stock 10k. Has alot more power and the extra rpm allows you to run higher feeds and speeds. Alot less likely to chatter with the small bits hogging out materials. My first test was on 1/2" birch plywood running 20k rpm 30in/min feed 9in/min plunge and 0.028" depth per pass and it flew through like a hot knife through butter. That being said this is my second spindle the first one was so out of balance it was super loud and shook the machine like crazy compared to the stock spindle which was nearly silent. I put in for an exchange and the second spindle I received runs perfect just like the 10k but much better performance. Don't settle for one that is loud and shakes they aren't supposed to.

Although I haven't had this for long, I felt compelled to write this.I have a TT 3018. The first few cuts I made in wood were disastrous. Basically, the ER11 coupler that came with it keep moving. I tried fixing it but found out that the motor shaft was 4.89mm and the coupler hole was 5.25mm. Horrible vibration and it eventually fell out while cutting.I decided to buy this item since it advertised 20000 RPM and folks had good like with it's balance.The motor installed in the 3018 without an issue.Turning it on, without any cutting proved to be much more quite that the stock motor/coupler, indicating good balance.I also have a handheld RPM meter, bought here on Amazon:https://www.amazon.com/dp/B07Q6M95PFWhich I used to verify max RPM. It got 19800 no problem. I was able to also see 20700 but good enough.I also tested a few different motor speed settings, which showed that my cheap controller can get different speeds out of this motor.$30 set to 20000Hope this long table helpsSetting: RPMS100M3 3200S200M3 8000S300M3 12000S400M3 14600S500M3 16000S600M3 17700S700M3 18500S800M3 18500S900M3 19700This speed stuff is not exact but I'm happy to see that I can set different speeds if needed.Original motor supported 8000RPM max.I also did a 90mm x 100mm x 12m (depth) carving using 1/8 end mill and a v-bit at max RPM.Took about 3 hours. This motor cut through just fine. No over heating, not excess vibration, no stalls.For $25, throw out the original motor and get this.

I had a hobby CNC router with a 1000rpm spindle. From the picture you can see the bottom pockets are very rough. The square on top is from the Genmitsu 2000rpm spindle. The finishes are extremely smooth and precise. A great upgrade to my machine.

This was a great upgrade to my 3018 pro. I upgraded the y axis and this spindle together and now I have a machine I can actually use to do bigger projects. It is considerably louder than the old one but no more than I expected, after all it is twice the RPM. First carve with it was 4 hours and it preformed fantastic. Much cleaner results. There is a slight vibration at around 14,000 to 15,000 rpm but nothing terrible. I will just avoid running it at those speeds. For the price it out preformed my expectations.

It was so unbalanced that it was unusable. This also caused it to be extremely loud. I have a 1HP Bosch Colt router on one of my machines and this little motor is just as loud and has more vibration than that much bigger router motor. No matter what tool or feed and speed I used I could not get it to run smoothly.I'm sure this wasn't normal and the stock 10K motor is very smooth and quite. Needless to say it had to be returned. I did not replace it because reading the reviews it's obvious that mine was not an isolated case and other people have had this issue as well so I'm not going to take the chance on this motor again. Genmitsu definitely need better quality control and not just for this item.