Hitec Servo Spline Screw Question

Help & Support Robot Parts
1

I am looking for the screw size for the servo screw that goes into the Hitec C1 metal spline.

I have been looking for days now, and can’t find one.

Firstly, I made an assumption that all C1 metal splines are the same. I’m not sure if that is true, so I will give you the specific servo I need the screw for.

The servo I need the screw for is an HS-82MG

I have found through research that the screw that comes with that servo appears to be a metric screw. Specifically, a M2.3 X 5mm screw. I couldn’t find any information on the thread pitch.

I couldn’t check it, because I could not find any M2.3 screws of any size anywhere to compare it to.

I need that same screw, but 2mm longer. So it would be a M2.3 X 7mm screw I am guessing.

Do these exist? I am mounting a custom part on the spline that has roughly a 2mm thickness after being pressed down over the spline.

I have searched online and found every manufacturer of metric screws that I could, and they all think I’m crazy when I say it’s an M2.3 screw. They say they would have to custom manufacture that for me.

Before I am forced to go that expensive route, I want to first absolutely confirm the actual screw size and find out if I can get the parts that I need from HiTec or their distributors.

I do business with Servocity.com, but they were unable to find me the longer screws. I am almost positive I had seen them on their website quite a while ago, but I can’t find them now.

If anyone out there has had a similar issue, please tell me what your solution was.

2

We’ve reached out to the manufacturer and we’ll get back to you as soon as we receive their reply, or they may choose to reply here directly.

3

Thank you. I will keep checking back here.

4

The screw used for the horn is a 2.3mm x 6mm machine screw.

Hope this helps.

5

Please clarify something for me. I am assuming that the 2.3mm is the diameter of the screw and the 6mm is the length.

That does not address the thread. What is the thread pitch?

Also, 2.3 is a non-standard metric screw size. What manufacturers make that screw size? I have been unable to find one.

I am not trying to get around Hitec’s attempt to make proprietary parts that you can only get from them, but they do not make the length I need, so I am forced to look for other options.

Please let me know if you have any of this information, or know who I might contact who does.

Thank you for your help,
Bob

6

The manufacturer is looking into the exact pitch. If you only need one or a few, they are prepared to send some in an envelope free of charge.

7

Thank you. I do need a few now. I will take as many as they are comfortable sending me, but I do want a regular distributor because if these are the right length and fit into that Spline, I will be needing them on a regular, ongoing basis. I have no problem paying for them, I just need to know that there is a place where I can regularly buy them when I need more. I am selling a product that uses that servo but attaches a custom piece to the spline. That piece is thicker than the usual servo horns and gears which are available, so I need the longer screws. With any luck, sales will do well, and I’ll need lots of them.

I’m surprised the need for a longer screw comes up so infrequently that it is this difficult to find.

Should I share my mailing information here, or is there someone I should send it to directly?

8

Can we provide the manufacturer with the e-mail you used for this account to put you in touch? Don’t write it in public.

9

Yes, that would be great. Send my email.

10

Hallo cbenson,

I have lost te screw for my hiteq hs-645mg servo.
Can hou help me?

Regards jan

11

Quite a few sites all seem to agree that the horn screw is M2.6 x 8mm long. Unfortunately Hitec does not provide us with any spares. You can likely find something online from a hardware provider like McMaster-Carr, or even an electronics site like Digikey.