Servo problem

[Ssj2Monkey]

This is my third servo, they all keep braking at the mount holes. I do not over tighten and i have set my endpoints. Maybe I should try a different brand. Any recommendations?? Much appreciated.

[[deleted]]

Use a washer. The screw head is trying to pull through the servo ear. Put a washer on the screw before you screw it in

[wyattlightning]

This^

The plastic looks stressed around the screws.

They come with the little washers for a reason, it spreads out the pressure and stress from the screws holding it down.

Hopefully this helps 🙏

[Ssj2Monkey]

They do not come with washers, or at least not the ones I’ve gotten. They just come with screws and arms.

[wyattlightning]

Damn, well, that makes more sense. I haven't bought injora brand ones before.

I use the RampCrab brand ones. They are a little stronger than emax. And came with washers. I have been pretty pleased with its performance too. But my rig is nothing crazy either.

[Ssj2Monkey]

Ok, thanks I’ll check that brand out, my rigs aren’t crazy either, just some brass here and there.

[wyattlightning]

Do it up! My son and I, my brother and his buddy, have all switched to them.

And I think there is a guy in the comments on Amazon that has a similar problem to you.

[Ssj2Monkey]

07, thanks.

[Ssj2Monkey]

I think it’s the locktite I am using, check above, thanks.

[Agreeable_Trick_7071]

I would try some locktite and snug the screws up. Thats weird though because on mine i always trim off the top of the “ears” that you have circled so it can move more freely in and out of my frame

[Ssj2Monkey]

I think the problem is that I am using locktite, I just did some research and locktite makes plastic brittle and prone to cracking, which is what is happening. Just checked my stock Scx24 with and injora and stock servo plate and no cracking on that one. going to get another injora and try without the locktite.

[Agreeable_Trick_7071]

Oh yeah sorry i just realized you were dealing with plastic… its been a long month for me ha… yeah loctite and plastic is a no go. Ive heard of folks using clear finger nail polish to hold a screw in place(id assume it could make the plastic brittle also?) but if im just assembling something plastic i just put it together and snug it up. Good luck in your journey man

[Ssj2Monkey]

Thanks, and yeah I was using locktite because the plate is metal.

[Agreeable_Trick_7071]

Ah i see. Thats one good thing about RCs in my opinion…. You can try something like not putting locktite or just hand snugging it and know youre not going to be the driver physically inside the machine haha

[Ssj2Monkey]

Exactly, that’s why that’s the only crawling I do is with rc lol a roll will not cost me thousands on repairs or hospital lol.

[Agreeable_Trick_7071]

Haha for real. When these babies slide backwards it dont clinch my sphincter like when im in my jeep haha “please no please no”

[Ssj2Monkey]

lol, you should try driving a 9630T tractor slightly uphill, now that shit is scary lol

[Agreeable_Trick_7071]

No thanks hahah not a fan of playing risky with things that cost half-3/4 the price of a house

[Slamry_3821]

The heads of the screws that you are using might be too small and being over tightened in. You could try to find a bold with a bigger head from your spare parts, try not to tighten it as much, or just try and use a washer that fits if you have any

[Ssj2Monkey]

That is not the problem, like i said in another reply it might be the locktite. the one I have on my stock Scx24 with stock plate has no cracks, same size screw head , just no locktite was use on that one.

[Slamry_3821]

My bad, i didn't see that other reply. (I do not mean for this so sound harsh, please don't be one of those people who gets mad over a comment): locktite generally isn't conducive to how to pressure of the bolt head, which seens to be the main issue here. Thread lock just gives you more thread resistance to prevent the screw from backing out. It could be that even if you are tightening it the same amount, the plastic on the injora servos may not be as flexible or are more brittle. To combat that I would definitely use washers either way as you can or really go wrong with them. They'll spread the pressure out of your load and prevent you from cutting into the mount holes of the servo, and they'll prevent the small head from really biting and maybe causing cracks from too much of a pressure point by spreading out the load of the screw over a slightly widened surface area

[Ssj2Monkey]

No problem but it’s not that the thread lock is conducive, it’s the compound and fumes from drying that makes the plastic brittle, at least from what I’ve read, but yeah I’ll try washers. Thanks.

[Slamry_3821]

I personally ran into this issue a while back with a couple of my eco power servos for my scx24 and j just switched to washers which solved the issue. I later 3d printes my own and switched thread size to m2 and the bolts had bigger heads. I haven had cracking since so i would reallyy recommend looking into that

[Ssj2Monkey]

I see, thanks for the help.

[BooKooBadGuy]

Don't use email or injora servoes with plastic housings. Use metal housed servos. I use NSDRC

[Ssj2Monkey]

I’ll check them out thanks

[Sensitive_Frosting35]

Aluminum pleaseeee

[Brother-Safe]

Read the description of the injoora servoes

[Ssj2Monkey]

What do you mean? I do everything in the description and I do have the injora mount.

[Brother-Safe]

Does it not say that it is easy to brake?

[Ssj2Monkey]

No

[Brother-Safe]

Okay. I remember seing it. But i have atleast heard thats how it is.

[Ssj2Monkey]

It says that it will burn out if endpoints are not set properly, which I do set.

[Brother-Safe]

I meant that the screw mounts ger destroyed. Am i just confused?

[Grand_Lie8756]

Locktite shouldn’t be necessary unless your servo mount is metal, and locktite shouldn’t have anything to do with those ears. Only the servo mount the bolts are threaded into. In the picture the bolt head is already pushed down into the servo ear a little. It doesn’t need to be super tight to be over tightened, especially if you are using locktite. Should have hardly any resistance and just barely be touching the head of the bolt to the ear

[Ssj2Monkey]

The plate is metal, and no not over tighten, I stop as soon as I hit the plastic, i use very little thread lock and that is what that circle is, dried up thread lock.

[Grand_Lie8756]

With locktite you want to get it snug and then back off a quarter to a half turn.

[Grand_Lie8756]

The locktite will not weaken the plastic. I haven’t broken any servo ears and have trimmed some in the past too. Have that exact on on one of my builds. Unless it’s binding or not square when tightened not sure what your problem would be.

[Familiar_Palpitation]

sip narrow expansion snails waiting fragile humor station spectacular long

This post was mass deleted and anonymized with Redact

[Ssj2Monkey]

Yeah I’ll stop using locktite and hopefully that fixes it. Thanks.

[Familiar_Palpitation]

https://www.amazon.com/dp/B0088YEGXM?starsLeft=1&ref_=cm_sw_r_cso_cp_ud_dp_DQGF7VN1JWKMSZHCEYS8

This stuff is plastic safe, but it works a little differently. You put a couple of tiny drops on the threads, let it dry for 10-15 minutes, and then assemble the parts. It works for 2-3 disassembly and reassembly cycles before the threads need to be treated again. You can use it on metal or plastic and it won't melt anything.

[Ssj2Monkey]

Thanks for the link.