Help with the Acme Nut

Mike045

SatelliteGuys Family
Oct 28, 2005
102
8
Quebec
I have to replace the acme nut (V6-202) on my Von Weise actuator V76-5.
Any info how to get the piece and replace it ?

Thanks for your time,

Mike
 
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wvman

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Sep 19, 2014
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I have to replace the acme nut (V6-202) on my Von Weise actuator V76-5.
Any info how to get the piece and replace it ?

Thanks for your time,

Mike

Get an extra nut from Von Weise, install one for now, then take the other to someone with a lathe and have a couple made from Oilite stock. Must be able to cut Acme threads. I used to replace them for customers who had a failure of the nylon nut that came from the factory. The Oilite nuts are self-lubricating and will last many years.

I'll look in my shop, I may one one lying around. If I do you can have it for the shipping. :)
 

Mike045

SatelliteGuys Family
Oct 28, 2005
102
8
Quebec
I'll take your offer wvman!, if ever you find one in your shop; if so, just PM me.

What is the right procedure to remove the old one ? You seem to be pretty knowledgeable, which I am not :(

Mike
 

wvman

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Sep 19, 2014
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I'll take your offer wvman!, if ever you find one in your shop; if so, just PM me.

What is the right procedure to remove the old one ? You seem to be pretty knowledgeable, which I am not :(

Mike

Look at post #4 in this thread, Von Weise Actuator Nut Repair? It shows you how to get the old nut out and replace it. :) It's a little bit of a project. I'll look for the nut later this afternoon and see if I have one left.
 

Mike045

SatelliteGuys Family
Oct 28, 2005
102
8
Quebec
Thanks for your time, wvman!

Meanwhile I try to get info on the Von Weise site. When I get to the first page of Index, Gearmotor, Gear Motor, Gears, Linear Actuators, Actuators Motorreductores, transmisiones, actuadores lineales, Motores DC, Motores AC, Gear Reducer, DC Motor, PMDC Motor I see (bottom left) that the V76-202 is announced, but when I click on it, I get the message 403 Forbidden. Maybe I am blocked because I am from Canada, go figure.I also sent a message to the contact at Weise; so far, no response.

Mike
 

primestar31

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Mar 15, 2005
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Thanks for your time, wvman!

Meanwhile I try to get info on the Von Weise site. When I get to the first page of Index, Gearmotor, Gear Motor, Gears, Linear Actuators, Actuators Motorreductores, transmisiones, actuadores lineales, Motores DC, Motores AC, Gear Reducer, DC Motor, PMDC Motor I see (bottom left) that the V76-202 is announced, but when I click on it, I get the message 403 Forbidden. Maybe I am blocked because I am from Canada, go figure.I also sent a message to the contact at Weise; so far, no response.

Mike

I'm in Michigan and I also get the 403 error. There's something wrong with their page. They maybe moved it, and there's no direct link for some reason.
 
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wvman

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Sep 19, 2014
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Thanks for your time, wvman!

Meanwhile I try to get info on the Von Weise site. When I get to the first page of Index, Gearmotor, Gear Motor, Gears, Linear Actuators, Actuators Motorreductores, transmisiones, actuadores lineales, Motores DC, Motores AC, Gear Reducer, DC Motor, PMDC Motor I see (bottom left) that the V76-202 is announced, but when I click on it, I get the message 403 Forbidden. Maybe I am blocked because I am from Canada, go figure.I also sent a message to the contact at Weise; so far, no response.

Mike

Give them a call. They are very nice people. I doubt you're blocked because you're from Canada. Probably a server error on their end. They will answer your message, be patient. :)
 

Mike045

SatelliteGuys Family
Oct 28, 2005
102
8
Quebec
I finally got a response from my contact at Weise (Scott Albright); he tells me that they still have some of these nuts, 19.95$ each. He must check for the UPS charge for the good dellvered in the USA (my sister).
I also contacted hobbysat.ca as they advertise the acme nut for 19.95$ (nylon) and 29.95$ (brass); I am awaiting for their answer.

Mike
 
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wvman

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I finally got a response from my contact at Weise (Scott Albright); he tells me that they still have some of these nuts, 19.95$ each. He must check for the UPS charge for the good dellvered in the USA (my sister).
I also contacted hobbysat.ca as they advertise the acme nut for 19.95$ (nylon) and 29.95$ (brass); I am awaiting for their answer.

Mike

I'm sorry to say, I have turned the shop inside out and didn't locate an Oilite nut. I thought for sure there was at least 1 left, but if there is, I haven't found it. If I find it later, I'll contact you. :)
 

Mike045

SatelliteGuys Family
Oct 28, 2005
102
8
Quebec
Thanks again for your time wvman!

Hobbysat have not the piece (brass or nylon). Waiting for Scott response.

I am also considering the brass nut (Roton, referred by Lone Gunman); the cost is 30,77$ and the delivery charge is 13$, so total 43,77$. If that was an Oilite nut I would not hesitate, but what bugs me is the lubrication after.

Mike
 
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wvman

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Sep 19, 2014
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Thanks again for your time wvman!

Hobbysat have not the piece (brass or nylon). Waiting for Scott response.

I am also considering the brass nut (Roton, referred by Lone Gunman); the cost is 30,77$ and the delivery charge is 13$, so total 43,77$. If that was an Oilite nut I would not hesitate, but what bugs me is the lubrication after.

Mike

Since the Von Weise shaft is attached to the gear shaft and is exposed when removing the motor, It's relatively easy to grease the shaft. I use Moly grease because it's really slippery and bonds to the metal. It reduces wear on the nut and shaft. It's more pricey than regular grease, but worth it. It does great in mower deck bearings too. :D
 

Mike045

SatelliteGuys Family
Oct 28, 2005
102
8
Quebec
If the grease application is a one time one, then the bronze nut is more attractive. Some years back, I have dismantled the actuator and applied Lucas X-TRA Heavy Duty Grease to the shaft; I have just to renew my application, if I understand correctly.

Mike
 

Mike045

SatelliteGuys Family
Oct 28, 2005
102
8
Quebec
Just a follow-up. I ordered the Roton brass nut, cost 30$ as already know, but the delivery (in USA) was 20$ (Ouch!).
Finally I found this week a local shop to complete the process. I followed the suggestion from Snofly (Initial thread by Lone Gunman, March 2010) : ....

Do not cut the outside shaft. Use a hacksaw blade to cut the plastic nut in half lengthwise.
Remove the plastic. Make a steel tapered drift to drive into the end of the shaft. This will
spread the tabs out. Next insert new nut and squeeze the tabs into place. Hope this helps.

I had removed the plastic nut before, and the guy did the milling, spread the tabs out, and with a press squeezed the tabs; all this for 40$ Canadian, good deal.

Before reassembling I put some grease on the shaft and the inner tube.

Mike
 

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clucas

SatelliteGuys Pro
Sep 30, 2012
290
228
Lompoc, California
Is there anyplace to buy the acme nut? After about three weeks of waiting for an email response (they didn't answer the phone) I received this from Von Weise:
Unfortunately we do not sell to the public
Our MOQ is 100 pieces, FOB El Paso TX, terms are 100% CIA
Our Web page is under enhancement

Best regards!

I bought the brass nut from Roton but it won't fit on the screw. It only goes on a little way and gets tight. I don't know if it is tapped deep enough. I may have to consult a machine shop to see if it can be fixed or maybe just make another nut.
 

arlo

SatelliteGuys Pro
Dec 4, 2016
635
360
North Eastern
I drilled my outer tube to thread in a zerk. Just big enough to let the tapered threads bite. Pumped it with Lucas -40 grease.
First time in a few of these -20 winters haven't gotten a "Motor Error".
 
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jpangburn

New Member
Oct 26, 2021
1
3
Escondido, CA
I ran into the same thing, needed a new nylon nut but Von Weise didn't return phone calls or email. Didn't want to order the brass nut then have to take it to a machine shop, plus I figure this part is made from nylon so it can wear out or break instead of some really hard to replace part breaking. So I designed a new nut in 3D software and had it printed in nylon online, but it was too tight- I had used the 3/4" acme threads which are sized exactly to fit but apparently you need to leave some room. Made the thread faces smaller by 0.005" and raised the foot and crest by 0.003", and printed it again- it works great though it seems like it could be a little tighter so it'll last longer.

For anyone that's interested in doing the same thing I tried to attach the STL files that you can send to be printed, but I guess you can only attach images in this forum? For this reason, I just created a page with links to the STL files I made and thorough instructions about how to use one of the STL files to get a 3d printed nut (it cost me $18 and change to get it printed/shipped) and how to replace your broken nut with this one.

Von Weise Linear Actuator Fix for model v76-5

I attached a couple screenshots from the article. The first is the result of getting the old nut out with a jigsaw:
jigsaw_results.jpg
The second is the new nylon nut on the threaded rod (the outer tube is removed in this photo to test the nut on the rod).
new_nut_on_threads.jpg

Here's the link to the nylon nut STL file in case you're familiar with 3D printing and it's so obvious to you what to do that you don't want to bother with the article :) .

Nylon Nut STL File

If you want to try the STL file with a tighter version of the nut (that I have NOT tried myself), check the article.
 

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