C2 66 replacement scissors jack acme screw and nut

[Russ S.]

Does anyone on here know where I could get 1/2 inch 5 acme threaded rod stock and acme nut to replace those on C2 jacks? I have searched the internet for hours trying to find a supplier. Thanks

[Joe L.]

Re: C2 66 replacement scissors jack acme screw and nut

Does anyone on here know where I could get 1/2 inch 5 acme threaded rod stock and acme nut to replace those on C2 jacks? I have searched the internet for hours trying to find a supplier. Thanks

Russ-----


The size you seek is virtually impossible to find. It must be that this size is, essentially, obsolete in the "modern world".

[Russ S.]

Re: C2 66 replacement scissors jack acme screw and nut

Obummer Joe. Anyone know of a machine shop that would turn a few of them?

[Joe L.]

Re: C2 66 replacement scissors jack acme screw and nut

Obummer Joe. Anyone know of a machine shop that would turn a few of them?

Russ------


I think going that route would be problematic. First off, you'd need to select and obtain rod of a suitable alloy. Then, after machining, you'd have to have it properly annealed. I think the best bet would be to find some other "run-of-the-mill" jack that uses the same threaded rod and salvage the rod from it. I think some old pick-up trucks used the same type scissors jack.

[Russ S.]

Re: C2 66 replacement scissors jack acme screw and nut

The originals don't appear to have been annealed. A mild steel would work but with a small content of lead would make them easier to machine with better results. It's not a high stress application.

[Steven B.]

Re: C2 66 replacement scissors jack acme screw and nut

As I understand it, annealing is a heat treatment process by which a ferrous metals hardness is reduced in order to cause it to be more easily machined or worked. With ferrous metals, the metal is heated to a high temperature and allowed to cool slowly. Cooling quickly causes a ferrous metal to be hardened. Oddly enough just the opposite is true where it is desired to anneal or harden non-ferrous metals such as copper. Usually, non-ferrous metals are quenched, sometimes in a pickling solution to anneal them.
I would wonder if anyone is manufacturing an acme tap in a 1/2" size. I would guess that 1/2" is a bit on the small side to turn on a lathe with a boring bar. I would also be curious as to the hardness of the nut in a scissors type jack. I'm sure someone may have an answer.

Steve

[Gary R.]

Re: C2 66 replacement scissors jack acme screw and nut

I looked on McMaster but no 1/2-5

https://www.mcmaster.com/#precision-acme-lead-screws/=15vvm80

[Jim D.]

Re: C2 66 replacement scissors jack acme screw and nut

I looked on McMaster but no 1/2-5

https://www.mcmaster.com/#precision-...crews/=15vvm80

They sell both the rod and nut in a 1/2-8. Maybe the OP could replace both.

[Russ S.]

Re: C2 66 replacement scissors jack acme screw and nut

heat (metal or glass) and allow it to cool slowly, in order to remove internal stresses and toughen it[ You might be right Steven even tho I got conflicting definitions of the word. I took it to mean hardening. The nut originally apparently wasn't hardened as it is prone to wearing out as mine has. QUOTE=Steven Blanchard (54804);793372]As I understand it, annealing is a heat treatment process by which a ferrous metals hardness is reduced in order to cause it to be more easily machined or worked. With ferrous metals, the metal is heated to a high temperature and allowed to cool slowly. Cooling quickly causes a ferrous metal to be hardened. Oddly enough just the opposite is true where it is desired to anneal or harden non-ferrous metals such as copper. Usually, non-ferrous metals are quenched, sometimes in a pickling solution to anneal them.
I would wonder if anyone is manufacturing an acme tap in a 1/2" size. I would guess that 1/2" is a bit on the small side to turn on a lathe with a boring bar. I would also be curious as to the hardness of the nut in a scissors type jack. I'm sure someone may have an answer.

Steve[/QUOTE]

[Russ S.]

Re: C2 66 replacement scissors jack acme screw and nut

Jim and Gary. I hadn't found the 1/2-8 which would be getting close. I will have to check it out in person. Thanks.

They sell both the rod and nut in a 1/2-8. Maybe the OP could replace both.

[John M.]

Re: C2 66 replacement scissors jack acme screw and nut

Russ, I have the nut if I can find it in the tool chest, but no rod. Is the rod shot or just the nut.
John

[Russ S.]

Re: C2 66 replacement scissors jack acme screw and nut

John, For this one I just need the nut.

[John M.]

Re: C2 66 replacement scissors jack acme screw and nut

Russ, I found them. Two left; one for you and a spare for me. We made these on a CNC lathe about 10 years ago and I think they are about 0.060" thicker than stock. If so you can skin that off in a lathe. PM me your address.
John

[Russ S.]

Re: C2 66 replacement scissors jack acme screw and nut

Thanks John. PM sent