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I have a hard time finding ball suds that have a 5.8mm ball, is M3 thread and look something like this…

I use the ball studs and ball cups from the 22. I've redrilled and tapped everything to work. They should be easy for you to find.

fredswain wrote:I use the ball studs and ball cups from the 22. I've redrilled and tapped everything to work. They should be easy for you to find.

I should use them on the rear arms on a Scorpion and I don’t wane re tapped them if I can avoid it...

Lars, are those threads in the rear arms 3mm? If so, I would suggest using 4.8mm ball studs & ball cups. I never liked Kyosho's use of the larger 5.8mm balls and open-ended ball-ends because they wear out too fast and pop off too easily. Ball cups fit on a lot tighter and the design helps prevent a good amount of dirt from getting inside & in between the ball & cup.

Coelacanth wrote:Lars, are those threads in the rear arms 3mm? If so, I would suggest using 4.8mm ball studs & ball cups. I never liked Kyosho's use of the larger 5.8mm balls and open-ended ball-ends because they wear out too fast and pop off too easily. Ball cups fit on a lot tighter and the design helps prevent a good amount of dirt from getting inside & in between the ball & cup.

Then I need short ones, any suggestions’?

Kyosho makes short ball studs for the Lazer, I've used these in some places where there's very little clearance.

http://www.ebay.ca/itm/Kyosho-UM128-4-8MM-BALL-STUD-L-ZX5-New-in-Package-/360637850154?pt=Radio_Control_Parts_Accessories&hash=item53f7b0e22a

3Racing makes 4.8mm ball studs in every color, I've used these on all my builds; they're also available with 10mm long threaded part:

http://www.ebay.ca/itm/3-Racing-4-8MM-Ball-Stud-L-6-10-pcs-Green-/160999223495?pt=US_Radio_Control_Control_Line&hash=item257c4d30c7

If you REALLY need a tight clearance, you can find Delrin 4.8mm open-ended ball-ends, I've used that for the Optima steering assembly and on the servo as there's not much clearance there.

I like this package for the Tamiya M05 series, it gives you a lot of stuff to get you started for a very decent price - about $10:

3Racing #M05-16/LB

Thank you sir, do they come in red?

Hcp22 wrote:Thank you sir, do they come in red?

Not that particular kit, but 3Racing makes those ball studs in red, pink, purple, green, teal, etc.

I think I need open ball ends, when I use Yokomo balls as in the picture above the arm doesn’t fall down the last 4-5mm

Hcp22 wrote:I think I need open ball ends, when I use Yokomo balls as in the picture above the arm doesn’t fall down the last 4-5mm

I used these Delrin open-end ball ends also for the top half of my stabilizer assembly, as the stabilizer wire needs to protrude through the ball ends. Delrin is harder and more durable than plastic, they go on nice and tight and should last longer and have a lower profile compared to a ball cup.