View Full Version : Help indentifying a mill drill

12-14-2013, 10:40 PM
Picked up a mill drill at local scrap yard. I know the bad things about a round column mill but for $150.00 I can live with it. Cheap way to get a big brother for my mini mill. There is no identification on it anywhere.I feel sure it was built by Rong Fu but have searched the internet looking for a model with the same power quill feed like this one. I have figured out the different speeds and the operation for the down feed but the little dial beside the fine feed hand wheel has 2 different dials on it and can't figure out what the smaller one is supposed to do. It just rides with the big one. A manual would be handy if I knew what brand and model to search for. Anybody seen one like this? Thanks in advance!

http://i189.photobucket.com/albums/z59/dieseldoctor_1/Mill%20Drill/P1010048_zps342ab7af.jpg (http://s189.photobucket.com/user/dieseldoctor_1/media/Mill%20Drill/P1010048_zps342ab7af.jpg.html)

http://i189.photobucket.com/albums/z59/dieseldoctor_1/Mill%20Drill/P1010037_zpsecef1c08.jpg (http://s189.photobucket.com/user/dieseldoctor_1/media/Mill%20Drill/P1010037_zpsecef1c08.jpg.html)

http://i189.photobucket.com/albums/z59/dieseldoctor_1/Mill%20Drill/P1010049_zps248774fd.jpg (http://s189.photobucket.com/user/dieseldoctor_1/media/Mill%20Drill/P1010049_zps248774fd.jpg.html)[/I

[IMG]http://i189.photobucket.com/albums/z59/dieseldoctor_1/Mill%20Drill/P1010051_zps845e9f52.jpg (http://s189.photobucket.com/user/dieseldoctor_1/media/Mill%20Drill/P1010051_zps845e9f52.jpg.html)MG]

12-14-2013, 10:48 PM
Chance one of those dials reads metric and the other inches?

12-14-2013, 10:55 PM
150.00? Welcome to the "you suck" club.

12-14-2013, 11:19 PM
Yeah, you suck. That is a great price even if it only ever gets used as a drill press.

12-15-2013, 09:02 AM
Any explanation why this thing ended up in a scrap yard?

12-15-2013, 09:48 AM
it sure looks like the 80's vintage enco rf-30 i have, minus the feed:


the warning decal on it even looks the same, though your paint is more of a green and mine has a blue tint to the green. i'd think it's got to be an rf-30/31, but in all the searches i have done since i got mine, i don't think i have ever seen a power feed like that.

and as to the comment about why it ended up in a scrap yard... i'd like to have a lot of the stuff i see carted into the small scrap yard that is just a few miles from me. there's not a lot of machinery in my area, so it's unlikely i'd come across a find like this one, but it's amazing what gets hauled in - tractors, snow plows, farm implements - all stuff in working order, and surely worth 2x-5x as much if it were a craigslist sale. there's a few trucks i see that go by a few times a week, each time loaded down with scrap. i guess they'd rather take $0.10 per pound instantly rather than wait to try to make $0.25-$0.50 per pound in a for sale ad.

loose nut
12-15-2013, 11:59 AM
Vintage mill/drill but with what looks like a power feed on the spindle. Very rare and yes you suck.

12-15-2013, 08:03 PM
It could be that one dial is metric and the other inches. I will have to look at it closer. As far as why it was in the scrap yard, I don't know. It had a 3/4" end mill holder in it and the drawbar was missing so I thought maybe the holder was frozen in the spindle and they gave up on getting it out. I threaded a piece of 7/16 rod and two licks with a hammer and it was loose. The spindle lock handle and first part of clamp is gone. And when they layed it over on it's side they broke the column crank off and also the LH X hand wheel. I hooked a motor (had to make motor mount) to it today and it runs quite as can be. All axis work as smooth as you could ask for after applying a little lube. Gibs seem to be adjusted properly. Table is hardly scratched. Just needs the surface rust removed.

The power feed has several speeds. The shift dial at the back has an off, low and high. Then the one up at top front has off, 1, 2, and 3,. Will have to get a belt for the drive on it. It has to be a round cross section belt like a big "O" ring. It has an automatic stop on the down feed also. I can't find any way to grease or lube the gears in the power feed. Wish I could find some information on the power feed.

12-15-2013, 09:43 PM
Just wondered why it would have ended up there, strange really. Anyway you got a great deal, hopefully you can get it sorted out, get a manual, etc and get her running.
Forgot to ask, and maybe i missed it, are those things R8 or?

12-29-2013, 11:28 PM
This one is R8, but I have to pull collets in all the way with the drawbar and drive them all the way out. Have tried to wire brush the bore to free it up but not having much luck. Collets go into my mini mill real easy until they start gripping the mill. Don't know if mini mill is too loose or this mill drill is too tight. Maybe as I use this one it will free up.

Still haven't found anything on the internet anywhere about that style of spindle power down feed. Was hoping someone out there had one like it and some info on it.

loose nut
12-30-2013, 11:01 AM
R8 collets should go in easily and come out with a light tap of a rubber mallet on the draw bar. It could be dirt in the bore or maybe just a tight fit. Poor quality control (as if they had any at all) at the factory

12-30-2013, 12:05 PM
That looks an awful lot like the one that my bowling pro shop used to drill bowling balls. Made (Marketed??) by Jet. The same feed mechanism.

Bowling alley machines are really lightly used. They use the table for an X-Y positioner when they drill. They seldom move any thing more than 2 inches. I've never seen him lower the head at the local shop.

Good catch there.