what diameter size for ballscrew?

[15mgtar]

I have nema 34 HB stepper 1600 oz and looking for a ballscrew to match it but don't know the size diameter of the ballscrew can someone help me?

[Zappautomation]

You need to look at your application rather than match the ball screw to your motor.
You need to look at the length, load and speed you need.
Ball screws can take a lot of load, but what causes problems is the longer the screw the slower you can turn it before it starts to ship.

Originally Posted by 15mgtar I have nema 34 HB stepper 1600 oz and looking for a ballscrew to match it but don't know the size diameter of the ballscrew can someone help me?

[15mgtar]

Ic thanks,
well I just purchase a ballscrew and ballnuts and now I need to take out the ballnuts from the ballscrew, how can I do that?

btw very nice store you have there Zappautomation, got tons of stuff there.

[Zappautomation]

If you got a mandrel (Tube) with the ball screw and nut, you can fit this over the machined end and of the screw and then screw the nut off of the end of the screw onto the mandrel.
Once you have it on the mandrel make sure you dont let if come off of the mandrel or the balls will fall out.
Thanks for the complement.

Originally Posted by 15mgtar Ic thanks, well I just purchase a ballscrew and ballnuts and now I need to take out the ballnuts from the ballscrew, how can I do that? btw very nice store you have there Zappautomation, got tons of stuff there.

[15mgtar]

Zappautomation I don't really understand it. Are you saying put a smaller diameter cylinder behind the ballscrew and unscrew the nut to the cylinder?
I really need to get those 3 ballscrews lathed.

[Al_The_Man]

Why do you need to remove the nut to turn them?
I turn all mine without the hassle of removing and reloading a ball nut.
Al.

[Zappautomation]

As al mentioned, machining the ball screw with the nut on should not be a problems, but just get the nut as close as possible.

[15mgtar]

the lathe pipe is about 40mm in diameter and the ballnut w/ flange is about 65mm so I can't get the ballnut close to jaw of the lathe machine.

[Zappautomation]

That is ok, have the ball nut on the other site of the lathe, just put it as close to the lathe as possible.

[Al_The_Man]

I just reloaded a double turn ball nut and believe me if you can turn them without removing the nut you will be glad you did.
BTW, If you ever have to reload from scratch, measure the ball dia on several balls, I am glad I did as it had a common method of every other ball being a few thou smaller, this is in order to stop binding when operating.
So you have to divide them into distinct piles when reloading.
Al.

[15mgtar]

Guys, what rpm should I set to turn the ballscrew with the nuts on? around 170 enough?
btw the seller is going to give me a collar for removing the ballnut, should I take it off?
I'm tempting to machined them myself but then again the parts are imported and expensive maybe I'll have the expert do them ( but then again I don't know any experts here that does that since everyone claims they are expert machinist)

[Zappautomation]

Sorry, im not a machinist so cant help you.
I have attached the standard machining details that may help.

Originally Posted by 15mgtar Guys, what rpm should I set to turn the ballscrew with the nuts on? around 170 enough? btw the seller is going to give me a collar for removing the ballnut, should I take it off? I'm tempting to machined them myself but then again the parts are imported and expensive maybe I'll have the expert do them ( but then again I don't know any experts here that does that since everyone claims they are expert machinist)