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Possibility of Using Inch ACME thread in a Metric Threaded Hole

HMH

Plastic
Joined
Apr 9, 2022
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.
 

L Vanice

Diamond
Joined
Feb 8, 2006
Location
Fort Wayne, IN
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
 

thermite

Diamond
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

They were pretty sorry even by 1970. Grainger was carrying them and "Day Job" kept replacing them as the Gorilla's drilled the jaws and rails, if not also the screws, full of holes, then cracked the base rails

:(

I still have ONE made from the sad remains of four.

The screw from A, the TWO movable jaws, from B and C, one formerly movable doweled to the cut-short busted-off rails from "D" to become the "fixed" jaw.

Opens only about an inch, but it's a really handy and compact little devil, so still in now-and-then use near fifty years on... given if something is cheaply built, most of us notice that, CAN respect wotever limits that imposes and "run what you got"....

Mind, 78th year, I'm near-as-dammit clear OUT of "vices", but still have PLENTY of "vises".

Gerardi, Quad-I, Multivise.. "etc."

:D

Palmgren?

Phhhtttt... "scrap metal" would be generous..

Hate to be the one to say it, but the average Chicom ones are fit and function just as good..... some few are actually better.
 

HMH

Plastic
Joined
Apr 9, 2022
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

Stainless
Joined
May 20, 2021
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

Diamond
Joined
Nov 23, 2003
Location
Beaumont, TX, USA
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.
 








 
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