No more nook ballscrews from homeshopcnc

[LazyMan]

Hi, I was looking into .631 .2 ballscrews and homeshopcnc was the only place that I have seen that will sell them to you without all that quote nuissance? Anyone know where I can get them?

[fatal-exception]

How about nookindustries.com ? Just tell them you want plain screwstock, no machined ends.

Probably slightly more expensive than homeshopcnc since your aren't buying in bulk, but the same stuff.

Maybe it's a sign. Look for something even better???

Paul

[DR-Motion]

Try here http://www.reidsupply.com/aDetail.as...nook+ballscrew
About as cheap as anywhere and they also ship to Canada

[LazyMan]

How about nookindustries.com ? Just tell them you want plain screwstock, no machined ends. Probably slightly more expensive than homeshopcnc since your aren't buying in bulk, but the same stuff. Maybe it's a sign. Look for something even better???

I requested a quote for a few ballscrews from nookindustries.com but havent recieved anything from them and I have a feeling they arent going to take me seriously. I was looking for the XPR series with a lead error of .001"/foot. The only thing better would be some precision ground screws but I cant afford that. I remember from homecncshop it cost $3 an inch and $60 for a preloaded nut which was not bad. I have looked at other manufactures and havent found a preloaded nut that costs less than 150$ Im looking for a source for Hiwin screws with no luck.

[LeeWay]

Mcmaster Carr sells rollled ball screws. Similar to Nook. The ones I got were Thompson. Not preloaded though.

[Cartierusm]

Try this http://www.roton.com/ I'm using them in mine. Awesome and the prices are dirt cheap. I use 2 ball nuts on each axis and use a spring between them to set the "preload" and I get no backlash at all and it will self compnesate for wear in the future. I didn't buy the ball nut mounts though, I wish I had them, but I still wouldn't buy them at $35 a piece they are more expensive than the ball nut which is ridiculous.

[eloid]

Originally Posted by Cartierusm Try this http://www.roton.com/ I'm using them in mine. Awesome and the prices are dirt cheap. I use 2 ball nuts on each axis and use a spring between them to set the "preload" and I get no backlash at all and it will self compnesate for wear in the future. I didn't buy the ball nut mounts though, I wish I had them, but I still wouldn't buy them at $35 a piece they are more expensive than the ball nut which is ridiculous.

did you over size your ballbearings and by how much?

[LeeWay]

Usually if you go the extra cost for a double nut, there is no need to preload the nuts with bigger balls. Alternating larger balls is usually only done on single nuts. I don't reckon it would hurt anything though. If you can locate the proper balls, they are generally pretty cheap.

[whoafat]

I procrastinated too long and now I find myself in the same situation; lloking for a source. Hoss's webpage mentioned www.grainger.com as a possible lowcost alternative. I could not find the specs for these rolled ballscrews on their site, but someone in the Grizzlyminimill group mentioned that a sales rep told him the error was 0.003/ft. I would be interested to know if we can do better for what grainger chrges.
wilfred

[LazyMan]

Try this http://www.roton.com/ I'm using them in mine. Awesome and the prices are dirt cheap. I use 2 ball nuts on each axis and use a spring between them to set the "preload" and I get no backlash at all and it will self compnesate for wear in the future. I didn't buy the ball nut mounts though, I wish I had them, but I still wouldn't buy them at $35 a piece they are more expensive than the ball nut which is ridiculous.

Yep, I have used them in my machine here and used a simalar preloading method as you.

http://www.cnczone.com/forums/showthread.php?t=50790
http://www.cnczone.com/forums/attach...7&d=1200786671

Im really looking for something that will hold .001 per foot, has a preloaded nut with wipers on it.

[Cartierusm]

I don't think grainger would be cheaper than Roton. As for the Balls I have larger balls only because I didn't pay my prostitute and she knocked my junk around, now they're huge...oh you mean my ball screw balls. Leeway is correct the reason for double nuts are to eliminate the PITA task of finding then changing out the ball bearings. The problem is unless you know exactly what to do and what to get you won't know the exact backlash until the machine is up and running and you can measure it. With my method there is zero backlash and it's easily adjustable if your parts ever wear, which is most people's situation would be very rare. I figured my way was easier as the ball nuts are only like $23.

[whoafat]

Cartierusm,
You are right. Both http://www.roton.com/ and Granger weere mentioned as sources but the reference to the lower priced was indeed roton. Additionally, the nuts are square and if one is to follow Hoss's approach, one nut must be rounded off for only one of the axes so that they it will fit; don't remember if it is the x or y axis,
Wilfred