OTMT milling machine on Craigslist - any good?

Dave Paine

Registered
Registered
Joined
May 10, 2014
Messages
814
I would want to see this operate before I would consider a purchase. The handles should not be a problem to fix or replace, but if the quill is running rough or has too much run-out, then can become a project machine in a very short time.

The head is heavy. Make sure the Z axis handle and gears work well to move the head up and down.
 

MAKEITOUTOFWOOD

H-M Supporter - Silver Member
H-M Supporter - Silver Member
Joined
Dec 3, 2016
Messages
401
You need to go check it out before its to late.
 

COMachinist

Active User
H-M Platinum Supporter
Joined
Sep 10, 2013
Messages
352
Wow wish it was in Colorado. I would buy it to turn for profit or CNC it. We never set any thing like that around here.
CH
 

DiscoDan

H-M Supporter - Gold Member
H-M Supporter Gold Member
Joined
Jul 16, 2018
Messages
520
I would want to see this operate before I would consider a purchase. The handles should not be a problem to fix or replace, but if the quill is running rough or has too much run-out, then can become a project machine in a very short time.

The head is heavy. Make sure the Z axis handle and gears work well to move the head up and down.
How much run out is too much?
 

Dave Paine

Registered
Registered
Joined
May 10, 2014
Messages
814
How much run out is too much?
A simple question but not a simple answer. It depends on the tolerance required for the items you are making. If the runout was X thou and you needed a tolerance of <X thou, you will not be able to make the desired tolerance.

To measure the spindle runout you would need to take a decent collet and end mill than use the shaft of the end mill with dial indicator or test indicator to get a good measurement. Measuring the outside of the spindle is going to have more apparent runout than items in a collet.

I do not know what runout would be expected from this machine when new.

I think you would want runout to be as low as possible, half a thou to a few thou.
 

jdedmon91

Registered
Registered
Joined
Dec 29, 2017
Messages
600
Looks like a bench type mill. Similar to my old PM25. If it moves in both axis freely and not much backlash. It should be ok. Just another small bench mill.


Sent from my iPhone using Tapatalk
 

DiscoDan

H-M Supporter - Gold Member
H-M Supporter Gold Member
Joined
Jul 16, 2018
Messages
520
I sent him a message already. Probably just a clean up and flip opportunity for me.
 
It can take up to an hour for ads to appear on the page. See our code implementation guide for more details. If you already have Auto ad code on your pages there's no need to replace it with this code
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock