Need help with ACME threaded rod information

[FOMOGO]

I need some help with ACME threaded rod strength. I cant seem to find good info on strength. In my application its not overly critical but I dont want to have a "hardware grade" piece that will flex and bend. I need to build a shop stool and I want to use a 1" X 12" piece of threaded ACME rod for the height adjustment. Was planning to weld 3 nuts in a 4 or 5 inch piece of tubing for the center post. Or can someone machine me a center post 4 inches long with the 1 inch ACME thread? I am just trying to gather the pieces to have on hand when the weather starts cooling down.

Thanks for the help,

Doug

 

[ZR9B]

check mcmaster carr....they have a good description and if they don't have your answer they "usually" have a guy you can talk to....I use them all the time.

 

[FOMOGO]

check mcmaster carr....they have a good description and if they don't have your answer they "usually" have a guy you can talk to....I use them all the time.

Went to McMaster Carr first and it was just confusing for me. So I came where I have faith that a fellow member has this information from experience.

 

[sparkwizard]

Are you wanting information or would you like the ACME threaded rod from an old shop stool?
I'm sure I have al least one you can have.

 

[sparkwizard]

Forget what I just posted. I have a couple of hydraulic ones, but the threaded one got bent while pushing the scrap pile toward the truck.
Sorry.

 

[FOMOGO]

Forget what I just posted. I have a couple of hydraulic ones, but the threaded one got bent while pushing the scrap pile toward the truck.
Sorry.

No problem. I do appreciate the offer though.

 

[Triley41395]

The strength would depend on the rod material itself. Low carbon steel(1020) would be easier to bend than say a threaded rod made from a tool steel(M42)
I could get my machinist Bible and give you all the different specs. but all you really need to know is a inch mild steel acme rod will hold your weight just fine(unless you're 400+ lbs.)

 

[ZR9B]

in mc master carr 1/2 10 goes from tensile 64,000 psi up to 125,000 has the Rockwell rating as well ....now we just need somebody to say how strong it really is...

 

[FOMOGO]

The strength would depend on the rod material itself. Low carbon steel(1020) would be easier to bend than say a threaded rod made from a tool steel(M42)
I could get my machinist Bible and give you all the different specs. but all you really need to know is a inch mild steel acme rod will hold your weight just fine(unless you're 400+ lbs.)

in mc master carr 1/2 10 goes from tensile 64,000 psi up to 125,000 has the Rockwell rating as well ....now we just need somebody to say how strong it really is...

My concern is the leverage my 320 pound arse will generate when I sit on the edge or lean over and it gets bound up. I figure the bend will be the rod at the threaded center it screws into or the top plate will give up. I dont know??? I have a habit of over building AND over thinking things like this. I dont need spaceage material but I dont want to waste time with hardware grade junk either. Just need to find a happy medium.

I need a good hieght for working on brakes for example and them I would like to raise it up for use at the workbench or welding table.