Pm727M Teardown

PM-727M CNC Conversion Series
In this video I begin to tear down the mill so I can modify the base and begin to test fit the mounts. There is a lot of random things going on so I will try to organize the video when I can. A couple of Notes The IEC metric motor is a direct replacement for the stock motor.
I have tried to be as detailed as possible to the point of being informative but not boring. I will try to keep the videos around the 15 minute mark. Please comment and let me know if the content is spot on or you would like more information and details. I will do a complete overview video to conclude the wiring in which I will go thru how the system operates. Thanks for watching , please subscribe, thumbs up if you like the video, and most importantly , Be Safe!

Download the Ball-screw drawing here:

In the next video I will notch the base for the Y Axis Extension Travel appears to be Y axis 9.5" and X Axis 18"

Precision Matthews PM-727M $1849 Shipped

Disclaimer. I am not a professional. My videos are intended to

[kendesign]

no looking back now my man! it's going to be awesome! !!

[dkerekes]

Im so excited to see this working! Ive been watching this build from the beginning... every video (with a like of course). Good luck with the Assembly process. Super helpful videos. Thank you for your time!

[Lakesidearmorer]

Looking good Sam, keep trucking. George

[benjaminusey]

Awesome! I will be ordering mine this week! I took some pictures of my electronics box as you requested but my phone died. I will try to get some to you soon. The Texas heat has been too bad to spend much time in my garage lately.

[EZ_shop]

I've been waiting to see this teardown. Hey Sam, if you'd like some 3D printed ABS covers for those holes where the handles came off the head, draw them up and send me the files. Just keep them below 17 cm. Ciao

[rodm]

Great video! Looking to do one of these after my BuffaloTools/RF45 copy is finished. I look forward to seeing your electronics and choice of controller.

[inventorsworkshop]

Nice teardown ;-)
Roger Clyde Webb Australian Inventor

[fastlanehobbies]

Btw that spindle is identical to my rf-31. I just replaced it a few weeks back.

[billbaggins]

Well now you have seen the guts of this machine and I was wondering if you could give an honest opinion on the quality along with fit and finish or anything else you could respond too. Thanks for the videos, I am using mine but as stated before won't be converting to CNC.
My only complaint are the knobs to change gears, seems like I'm always fishing for one or the other. Not a biggy, just annoying for me. Thinking about removing the knobs and replacing with levers. If so I'll let you know if it's any better.

[thebeerbaron]

Did you replace the spindle bearings? I am looking for part numbers for replacement bearings. I upgraded to a VFD and I am getting a lot of spindle heat when running at higher speeds.

[DCT_Aaron_Engineering]

Looks like a solid and decent mill. Are you happy with it quality etc..?

[chriscramer]

would you have the part number for the motor?
enjoying the videos.
in process of doing the same machine.

[skirkdouglas]

Will you be adding a one shot oiling system to this build?

[turningpoint]

Not great quality control on the OEM's part having that rust on the motors shaft. Do you think it would have made things easier to pull the gear box top plate and motor as one assembly and then split those? I am a bit surprised you found a direct replacement motor that will drop in place tho. It's my understanding that some of the Asian built motors are built to there own motor frame standards that don't match up to the American or Metric frame standards. I'd say you got real lucky. Possibly I missed it, you did mention 3 ph. That's what your replacement motor is? If so then a very smart move. A 3 ph motor with a VFD is the only way to go with machine tools. Far smoother drive that get's you much better surface finishes with some very desirable options for motor control built right into most VFD's. But I dunno, doubling the motor speed I'd seriously consider upgrading any and all bearings in the head, it does seem your replacing the spindle bearings but I don't know if there's any others in the head itself. You can bet at the prices they build them to fit to those will be the cheapest bearings they can find. Even one spun bearing in the future would make replacing what you have now look pretty cheap.

[Metallurg]

Duct tape saves the day again! and maybe your foot and/or fingers! I probably would not have thought of that, thanks!