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DanC911 
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Joined: 22 Jul 2014
Location: CT, USA
Points: 598
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 Topic: Bench Vice Screw
Posted: 03 Dec 2018 at 9:38am |
I know that this is a little off topic but my cousin purchased an antique bench vice screw at a flea market figuring he could find the nut. After searching he learned it is an Acme thread so he ordered a 1-inch nut from a supplier on Long Island. It didn't fit so he ordered the next size larger and it didn't fit.
By chance he brought it to a hydraulic shop and they showed him that it is a 2 lead or 2 start thread. It has 2 parallel threads on it which is why it would not start in any of the nuts he tried.
The Long Island supplier does not carry them. I was hoping that someone on the forum might have one they can spare. If you do here are the specs:
- Diameter
is 1 1/16" measured with a caliper
- Stamped
with "40-1 1/8" on flange
- Pitch
= 4 tpi
- 2
LEAD or START screw!!!!
- Made
a long time ago by the Chicago Tool company!
Anything you can find out
the nuts for this will be greatly appreciated!!!!!! Photos to follow!!!
Thanks a ton
Edited by DanC911 - 03 Dec 2018 at 9:39am
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1950 WD, 1955 B, 66 Jacobsen Chief-O-Matic, 68 Simplicity 2110, 77 IH Cub Cadet 1450 w/front loader
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chaskaduo
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Joined: 26 Nov 2016
Location: Twin Cities
Points: 5200
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Posted: 03 Dec 2018 at 10:02am |
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I Googled "lead screw nut" and lots of info and sales places came up. Try it you'll like it.
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1938 B, 79 Dynamark 11/36 6spd, 95 Weed-Eater 16hp, 2010 Bolens 14hp
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allisrutledge
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Joined: 30 Mar 2010
Location: SurgoinsvilleTN
Points: 1360
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Posted: 03 Dec 2018 at 10:28am |
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Dan, a good machine shop is his best bet. Will cost a lot but is possible. I know a guy on here but he would kill me!!! Hope he's got a good friend with a shop. Good luck
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Allis Chalmers still exist in my mind and barns
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Ted J
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Joined: 05 Jul 2010
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Posted: 03 Dec 2018 at 1:16pm |
Scott, does he live in MI?? 
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"Allis-Express"
19?? WC / 1941 C / 1952 CA / 1956 WD45 / 1957 WD45 / 1958 D-17
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allisrutledge
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Joined: 30 Mar 2010
Location: SurgoinsvilleTN
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Posted: 03 Dec 2018 at 1:26pm |
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Mabee? I think there is one in middle Tn also!!! Better not say. 😁
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Allis Chalmers still exist in my mind and barns
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IBWD MIke
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Joined: 08 Apr 2012
Location: Newton Ia.
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Posted: 03 Dec 2018 at 1:29pm |
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Making one is probably the best option. The set-up and machining time is going to make it cost prohibitive. I have cut some double lead threads on a lathe, they weren't bad once set-up and going. However, they were external and NOT Acme. Internal, Acme, double lead would make for a difficult project.
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allisrutledge
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Posted: 03 Dec 2018 at 1:33pm |
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Not to mention using a material that will last . Dan , you better recommend he has at least 2 made if he goes that route.
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Allis Chalmers still exist in my mind and barns
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IBWD MIke
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Location: Newton Ia.
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Posted: 03 Dec 2018 at 1:46pm |
 allisrutledge wrote:
Not to mention using a material that will last . Dan , you better recommend he has at least 2 made if he goes that route. |
Good point! I hadn't even thought that far, machining it was all I considered.
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Tracy Martin TN
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Joined: 11 Sep 2009
Location: Gallatin,TN
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Posted: 03 Dec 2018 at 1:48pm |
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Best to take the screw to a good machine shop with a CNC lathe. Much cheaper this way especially for a one or two off part. Cutting a double lead will cost more, but is is cheaper than a quad lead. HTH Tracy
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No greater gift than healthy grandkids!
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DanC911
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Posted: 03 Dec 2018 at 2:12pm |
II sent an email to the machine tool shop at the tech school I attended while in high school. The department had said they could probably make it. The hard part would be making the tool to cut the internal thread. Seems like it would be a good project for a future tool maker.
Thanks for all the help. I would not have even thought of checking with them if you folks hadn't mentioned getting it machined.
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1950 WD, 1955 B, 66 Jacobsen Chief-O-Matic, 68 Simplicity 2110, 77 IH Cub Cadet 1450 w/front loader
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B26240
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Location: mn
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Posted: 03 Dec 2018 at 4:19pm |
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Dan I would try it if vice was closer, as I would want all the parts to get good fit. Double start thread isn't that hard , as said tool grind would be the critical part. FYI look at a water bottle screw cap I think they are three start thread.
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DiyDave
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Posted: 03 Dec 2018 at 6:26pm |
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steve(ill)
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Posted: 03 Dec 2018 at 6:42pm |
problem is going to be that 1 inch and 1-1/4 inch are the standard sizes.... 1-1/8 is an odd ball......... and if you do find it, it will "normally" be 5 threads... but you can find 4.
Edited by steve(ill) - 03 Dec 2018 at 6:49pm
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Like them all, but love the "B"s.
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Tbone95
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Posted: 04 Dec 2018 at 7:31am |
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I could make it for you here if you were closer. We have made parts with as many as 13 threads! (external, but no big deal). I'd just open a catalog and buy the tool. Might take all the fun out of it though.
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IBWD MIke
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Posted: 04 Dec 2018 at 10:48am |
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Something to think about on this; being a double lead acme thread that is 4 pitch. Threading tools for acme threads are pitch specific. It is '4' threads per inch but would need to use an '8' pitch threading tool. I'm about 97% sure on this. Clear as mud, right?
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LouSWPA
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Posted: 04 Dec 2018 at 12:41pm |
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ask Mr Coyote, he was pretty knowledgeable on Acme stuff
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I am still confident of this;
I will see the goodness of the Lord in the land of the living.
Wait for the Lord;
be strong and take heart and wait for the Lord. Ps 27
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DiyDave
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Posted: 04 Dec 2018 at 6:04pm |
Methinks a $50 dollar bargain has turned into a $500 project...
Might be time to sell it for less'n ya bought it for, and save some$  |
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