Mill / Drill Question

Jerry Adams

Jerry Adams

Joined
Jun 26, 2002
Messages
113
I aquired this today. It does need some repair, but the price was right (free). My question is did I bust my ass for nothing getting this thing home and off my truck. It has been sitting in a shop for about 5 years, but was being used daily up til the day it broke. Keep in mind I know nothing about these machines so bear with me while I try to explain whats wrong with it. All that needs repair it the lead screw assembly for the x-axis on the table. The nut the the lead screw goes thru was welded and needs the threads chased. Now for the stupid question, how do I find out what size tap I need? Any input would be greatly appreciated.

Thanks
Jerry
 

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May not find a tap for that. But, measure the diameter of the screw at the widest point, Outside diameter.

maybe 3/4 or 7/8 inch?

Measure the number of threads in one inch.

Diameter and pitch describe the screw. IE, 3/4 - 8 would be 3/4 inch diameter and 8 threads per inch.

Lead screws are usually ACME thread which have a flat crest and valley on the thread.

Any good machine shop should be able to help you out for 20-30 bucks.
 
Jerry Adams said:
I aquired this today. It does need some repair, but the price was right (free). My question is did I bust my ass for nothing getting this thing home and off my truck. It has been sitting in a shop for about 5 years, but was being used daily up til the day it broke. Keep in mind I know nothing about these machines so bear with me while I try to explain whats wrong with it. All that needs repair it the lead screw assembly for the x-axis on the table. The nut the the lead screw goes thru was welded and needs the threads chased. Now for the stupid question, how do I find out what size tap I need? Any input would be greatly appreciated.

Thanks
Jerry
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Jerry,

I have to say it looks like you bit off more than you can chew, but I will try to help you as best I can. Go to Harbor Freight and download a manual for the machine that most-closely resembles yours. Right off, it looks like this one: http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=33686 There will be parts diagrams there for you to see how things go together. Email me for specific questions.
 
As a start, I would check with MSC, www.mscdirect.com They have a lot of taps in inventory. The leadscrew probably is metric, so if the lead doesn't seem to be an exact increment of an inch, that would be th reason.
 
I'm on Frugalweaver's side on this one. Should be Acme thread. Measure properly and it's foolproof. I think with minimal investment you can have it back in action, and for free, of course it's worth it!
-Mark
 
Thanks for the input guys.
Jeff, you will probably be hearing from me soon.

Thanks again

Jerry
 
Jerry, if you decide it's not worth the trouble to fix, I'd be interested in purchasing a few of the parts. I've got a similar model that I can't find parts for.
 
IG, can you cut some pieces for my roller mill? I picked up the channel stock I need but it needs to be cut into smaller pieces and I dont have a torch yet.
 
Jerry Adams said:
IG, can you cut some pieces for my roller mill? I picked up the channel stock I need but it needs to be cut into smaller pieces and I dont have a torch yet.
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Jerry, we could do it on the chopsaw or bandsaw too. Give me a heads up when you want to do it. Saturday I'll be at a party all day and Sunday re-couping. ;)
 
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