Dear All,
I need only anti-backlash nut ( Kerk, Nook, BSA etc.) Where can buy from internet?
Thank.

Ballscrew, ACME, Metric, Imperial?
Be more specific

I need anti-backlash nut only for use with ACME leadscrew or Trapezoid leadscrew. I have screw.

http://gonebowlin.com/dumpsterCNC/

Dear Hobbiest
DumpsterCNC have only nut for acme leadscrew. I need both acme and trapezoid screw.

i think they can do custom backlash nuts, email them to find out.

i think they can do custom backlash nuts, email them to find out.
According to the site he will.

I ordered two nuts 3/4-6 Acme Nuts on 1/9/05. He said that he'd make them.
As of today,3/7/05 no nuts. He says "I'm getting quite a few orders that are keeping me busy also".
He woun't return me Emails.
I did get two 1/2" nuts from him on Ebay. Nice nuts!
Larry

I ordered two nuts 3/4-6 Acme Nuts on 1/9/05. He said that he'd make them.
As of today,3/7/05 no nuts. He says "I'm getting quite a few orders that are keeping me busy also".
He woun't return me Emails.
I did get two 1/2" nuts from him on Ebay. Nice nuts!
Larry
That Was DumpsterCNC

cant you make your own with two nuts and a spring washer in between?

I ordered two nuts 3/4-6 Acme Nuts on 1/9/05. He said that he'd make them.
As of today,3/7/05 no nuts. He says "I'm getting quite a few orders that are keeping me busy also".
He woun't return me Emails.
I did get two 1/2" nuts from him on Ebay. Nice nuts!
Larry

Hi Woodie1,

Glad you liked the 1/2-10's, I've been getting a lot of good feedback on them. Our hobby needs something in between the sloppy steel nuts and expensive ball screws/nuts... I hope I'm helping fill that slot.

Again I'll apologize for not being able to make the 3/4-6 leadnuts. I had told you that I'd "try" to make them and that I couldn't find a suitable spring. Then that I'd have to put your leadnuts on hold due to not having the proper tooling for a thread that deep and I only haven't replied to one email I received a couple days ago... my answer is the same, the 3/4-6 threads require a deep acme threading tool that I don't have.

I also don't have a tool for the trapezoidal (metric acme) threads yet. I'm just getting started at this and it will take a bit to get the specialized tooling.

Tim
dumpsterCNC
http://gonebowlin.com/dumpsterCNC/

dumpster,
How accurate can you get with your "nuts"? I'm planning to buy couple 1/2-10 to try out.

cnc2k,

These leadnuts put my cnc router at less than .0005 backlash, I use the 1/2-8 (2 start) screws. My 1" travel indicator can't tell me any closer than that really... I have backlash comp turned off in Mach2 (finally). I feel these leadnuts are zero backlash but can't guarantee it, you also have to take into account other factors that cause backlash such as endplay of the motors (if direct drive), pullies, belts, mounts, etc... plus the actual acme screw has a tolerance, usually .009 per foot.

Tim

I managed to build pretty good nuts from brass. Idea is little bit similar to that derling nut but without spring loading.

See it here:
http://www.students.tut.fi/~kontkant/jv2.php.html

Last time I adjusted the nut, I got less than 0.005 mm backlash (0.0002").

Can you give more details on how you made the nuts?
Thanks

Larry, check your email.