Recent content by JAndrew

I'd really like to get this lathe back running soon so I suppose I'll just run it as is. Wouldn't be too big of a deal to pull the spindle again later if ever needed. :/ -J.Andrew

Mcostello, Oops you're correct. Feeding not threading. Thanks. -J.Andrew

Sorry seem to have bungled the photos a bit. -J.Andrew

Hello all, I picked up a South Bend 13 lathe a few months ago locally. I've been looking for one for quite a while now. I'd like to think that this is the last lathe I'll ever need to buy (though my wife doesn't believe that). Here's a couple picture on the trailer and of a creative method...

All, I like that last picture best. On the end of that engine you can clearly see the Stephenson's Link for changing direction (kinda shaped like a banana). Very cool! -J.Andrew

Thanks all for the input. I'm probably going to attempt without a tap. The only tap in that pitch I can find is $95 used on ebay. No sign of long taps either. For now I cleaned everything and re-installed the nut with a slightly offset bushing on the tail end of the leadscrew. It...

Thanks bb218. I guess I will consider buying that $95 tap. The thread depth for this nut would be 0.074". That's quite a bit of rubbing for a 2.25" deep hole... Did you use brass or bronze? And which alloy? -J.Andrew

Crankshafter, Thanks a bunch for the very interesting link! I don't think it will work for this application because the material between the flat mounting surface and the bore is way too thin to be made of plastic. I will be filing this method away for later use though on other leadscrew...

Goldflash, Thanks but unfortunately nobody makes a nut with a large enough OD to allow for milling down the bottom alignment boss. Here's a quick model of the nut since I don't have it here to take a photo: No commercially made nuts have enough meat on them to mate up. Also not enough...

HMEM, I had to stop working on my first IC engine and tear down my Diamond horizontal mill's table. The leadscrew nut for the y axis is shot. There's no chance of me finding a replacement anywhere as it has an odd outside shape so I was going to go ahead with turning one myself (using the...

Ah I see. That makes sense too with 2 flute end mills having more room for chip clearance. Thanks JasonB and Swifty. -J.Andrew

That last photo is pretty incredible. Anybody know what the name or model is for that engine? I know for certain it was for shipboard use as there's many other photos relating the ships to the engines.

HMEM, A coworker of mine happened upon a stash of incredible glass plate slide photos from the early 1900's at Bath Ironworks in Maine. Another coworker of mine was able to scan them to incredible resolution. I doubt you'll see these photos anywhere else in the world. -J.Andrew

Hello, I had some time early this morning to give it another try. I tried running 0.050" depth of cut and cranking at about 13 ipm. The bit survived the cut well enough but it sounded a more like a wood router than a mill. It did throw off a spark as it broke through the exiting end but I've...

HMEM, I'm milling quite a few 1/4" wide grooves in carbon steel to a depth of .315". I'm using a nice carbide end mill and taking passes of .020" at a time. I've been running the spindle at 1200 rpm but the part is getting pretty hot by the end of milling one groove. I don't have a coolant...