Nyloc fasteners

Assembly questions and answers for the Shapeoko 3 CNC Mill
TomO
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Nyloc fasteners

Post by TomO » Fri May 08, 2015 12:41 am

I may upgrade my so3 with nyloc fasteners while I assemble it. For all the people that have their so3 is this the correct list of nuts?

12 M3 hex nuts
29 M5 hex nuts
1 M6 hex nut
4 M6 square nuts
6 M8 hex nuts




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WillAdams
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Re: Nyloc fasteners

Post by WillAdams » Fri May 08, 2015 1:09 am

http://www.shapeoko.com/wiki/index.php/ ... 8B.O.M..29

12 S3027 M3 Hex Nut
29 S3044 M5 Hex Nut - SS
1 S3079 M6 Hex Nut - SS
4 S3026 M6 Square Nut
6 S3038 M8 Hex Nut - SS

Seems to match.
Shapeoko 3XL #0006 w/ Carbide Compact Router w/0.125″ and ¼″ Carbide 3D precision collets

TomO
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Re: Nyloc fasteners

Post by TomO » Fri May 08, 2015 12:03 pm

Will can you tell me what the square nuts are for? I don't believe I will be able to find nyloc square nuts. Depending on application it might not be necessary.

Thanks


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WillAdams
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Re: Nyloc fasteners

Post by WillAdams » Fri May 08, 2015 12:08 pm

The 4 M6 square nuts fit into the channels of the (custom SO3) Z-axis rail extrusion.
Shapeoko 3XL #0006 w/ Carbide Compact Router w/0.125″ and ¼″ Carbide 3D precision collets

TomO
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Re: Nyloc fasteners

Post by TomO » Tue Jul 14, 2015 4:14 pm

Can someone confirm the thread pitch of the m8 fasteners? Coarse is 1.25 and fine is 1.0. Looking at a thread chart - m3, m5 & m6 are coarse only.


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HarryT
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Re: Nyloc fasteners

Post by HarryT » Thu Aug 20, 2015 8:13 am

I used nyloc fastener nuts from the beginning of the assambly. But I think it's better to use at least 2 normal nuts per motor until you have tensioned the belts. It's easier to tighten normal nuts during this process.

After the belts are tensioned you can change the normal nuts to nyloc ones nut per nut.
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veng1
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Re: Nyloc fasteners

Post by veng1 » Thu Aug 20, 2015 2:53 pm

Because Nylock nuts have, well, nylon added, they are taller than standard nuts. The square nuts fit into an extrusion and as best I could tell have to be the exact ones supplied with the kit. I just used thread locker on those.

Because the Nylocks are taller, you may want to get longer screws also.

I don't remember the pitch on the M8. I just went over to Fastenal with the nuts and had them order some Nylocks with the same pitch.

TomDChi
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Re: Nyloc fasteners

Post by TomDChi » Fri Aug 21, 2015 3:36 pm

WillAdams wrote:The 4 M6 square nuts fit into the channels of the (custom SO3) Z-axis rail extrusion.
I'm not a fan of gooping threadlock on everything, so I'll probably swap in nyloc nuts almost everywhere. But the square nuts for the Z axis rails seems like a very reasonable location/use of threadlock - it isn't something that needs adjustment once the system is operating for a while. (Is it even possible to adjust? Seems like the eccentric nuts deal with any of that.)

cvoinescu
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Re: Nyloc fasteners

Post by cvoinescu » Fri Aug 21, 2015 4:14 pm

TomDChi wrote: (Is it even possible to adjust? Seems like the eccentric nuts deal with any of that.)
If your Z rails aren't parallel, there's no way to adjust for that with the eccentric nuts. Your Z V-wheels will become tighter or looser as the carriage travels up and down. But once they're parallel, there's no need to come back to them.
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TomO
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Re: Nyloc fasteners

Post by TomO » Fri Aug 21, 2015 4:49 pm

TomO wrote:Can someone confirm the thread pitch of the m8 fasteners? Coarse is 1.25 and fine is 1.0. Looking at a thread chart - m3, m5 & m6 are coarse only.


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The m8 bolts have coarse threads. I bought all of the SS nylock nuts from fastenal - paid just under $40 for them.

Glad I did it - several nuts had already started backing off (I did not use the lock tight).


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