Jet JMD-18PFN Mill/Drill Overview & Review

BladesIIB said:
I have no trouble with .050" depth of cut with my 3" face mill in steel. I can cut a 3/8" keyway in one pass in steel. Power and rigidity on this machine is really good for the size IMO. Thanks for asking. Edit - Also, the largest end mill I have run is a 5/8" indexible end mill. 1/2" regular carbide end mill.
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Have you ever had any trouble with the head slipping around the column when making a cut? I have read a few counts of this happening but am not sure of what they were doing when this supposedly happened. I don’t believe thoes machines were made by Jet though. Jet machines seem to have better quality control and overall better fit and finish then others.
 
Brad125 said:
Have you ever had any trouble with the head slipping around the column when making a cut? I have read a few counts of this happening but am not sure of what they were doing when this supposedly happened.
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Are you serious? I've been using an RF-31 for over 5 years now and have taken some pretty hefty cuts with it and never had even a tiny hint of movement of the head on the column. I haven't heard of it happening to anyone else, either. To be honest, I think these round column mills, at least in the RF-31/JMD18 class, can keep up with most smaller knee mills in terms of rigidity and power. You are talking about machines in the 800# class here.
 
mikey said:
Are you serious? I've been using an RF-31 for over 5 years now and have taken some pretty hefty cuts with it and never had even a tiny hint of movement of the head on the column. I haven't heard of it happening to anyone else, either. To be honest, I think these round column mills, at least in the RF-31/JMD18 class, can keep up with most smaller knee mills in terms of rigidity and power. You are talking about machines in the 800# class here.
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Neither, just what I read. Take it with a grain of salt, like everything else that’s posted on the web.
 
Brad125 said:
Have you ever had any trouble with the head slipping around the column when making a cut? I have read a few counts of this happening but am not sure of what they were doing when this supposedly happened. I don’t believe thoes machines were made by Jet though. Jet machines seem to have better quality control and overall better fit and finish then others.
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Have never had the head slip. It is a pretty solid clamp around the column. I think I could break a pretty large cutter before the head would move.
 
I agree with Mikey & Blades.
i can’t take a fast full depth key way cut with a 1/2” endmill like i used to with the BP or Sharp, But they are very robust & i can’t even imagine the head slipping on the column even under the most extreme circumstance.
i am impressed every time I use it.
YMMV, Cheers
 
I figured it was very unlikely, like I said it was just a few accounts on different forums that I read. I just thought it would be interesting to compare the cutting capabilities of the round column machines to other commonly discussed home shop mills. I know there is obvious factors that could effect this. I don’t do heavy cuts no need to, if I can pull a 1/2 endmill at .100 depth and full with I am a happy camper.
 
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