Possibility of Using Inch ACME thread in a Metric Threaded Hole

[jim rozen]

Mine's a smaller vise, thread is 1/2-13 V-thread.

 

[tdmidget]

Lost in all this sage advice is the fact that it is a left hand thread.

 

[L Vanice]

I mic-ed several spots on the screw and was consistently getting ~0.69-ish, which translates to about 17.5 mm according to the quick calculator on google. I say "old" palmgren vise because it's been fairly well beat to death but I'm not sure how old it really is. The bolts holding the jaws in were also in metric as well as the set screw holding the acme thread to the moving jaw.

Sounds like scrap metal to me. Palmgren used to make pretty good stuff in the USA back in the 1960's. An old USA vise would be better than repaired junk. For that matter, new junk would be better than repaired junk.

Larry

 

[kustomizer]

Unless it is an OLD Palmgren vise it is probably not worth your time to fix it.

Old is another "perspective" thing, when I was 10 I couldn't imagine being old as 20, now look at me at 56 thinking I ain't "that" old.

 

[HMH]

Sounds like scrap metal to me. Palmgren used to make pretty good stuff in the USA back in the 1960's. An old USA vise would be better than repaired junk. For that matter, new junk would be better than repaired junk.

Larry

Yeah I figured it was none too nice of a vise. But thankfully I only paid $40 for it. I think it's plenty functional if you don't need precision (and if I can get the screw fixed) but otherwise it didn't exactly look too high quality. I'll probably end up selling it anyways since it won't actually fit on my drill press table lol. I bought it thinking it was smaller than it was.

 

[52 Ford]

Yeah I figured it was none too nice of a vise. But thankfully I only paid $40 for it. I think it's plenty functional if you don't need precision (and if I can get the screw fixed) but otherwise it didn't exactly look too high quality. I'll probably end up selling it anyways since it won't actually fit on my drill press table lol. I bought it thinking it was smaller than it was.

What I would do, if I were you (sorry for the rhyming) - grab the closest fitting SAE ACME size threaded rod and if it fits too snug, buy some valve grinding compound from NAPA, coat the threaded rod and run the rod through the nut a few times in a big wrench. Wash it all off with brakleen when done.

Since it's too big for your drill press, sell it on Ebay.

Sent from somewhere inside your house using Tapatalk

 

[EPAIII]

Do tell us precisely why you think it is metric. You say the OD of the screw is about 0.69". That is close to 11/16", a lot closer than it is to 18mm. Did you measure the thread pitch? How? Over how many threads? A measure over one or two threads on a bent screw could be off by a lot.