M-Jet SuperSprint Round servo horn re-enforced

Building a M-jet SuperSprint and need a round servo horn to fit your 7kg Injora micro serve? Well you come to the right place!

There was only one other servo horn that fit the Injora 7kg micro servo. I wanted to make it a print without supports and any big overhangs. So I created this little wonder. 

I also made the horn with a large chamfer so it would help re-enforce the servo horn. I also designed this with the use of a M3x8 Stainless Countersunk Head Socket screw to mount to the servo.

Installation Steps:

Step 1:

Put M3x8 Stainless Steel Countersunk head in the top of the round servo arm.

Step 2:

Line up and put the servo horn on the adapter. (Note line up with the middle hole. There are 5 holes in total. We will use the middle one)

Step 3:

Insert and screw in the two M2x8 screws and tighten. (Note: I tighten them all the way. M-jet directions say different)

Step 4:

Line up the servo horn with M3x8 screw sticking out toward the servo. Slowly tighten the M3x8 screw. Note: the servo horn will be presure fit as you are screwing in the bolt. Once snug and fully seated you are done!

Final install image:

Please note that if you keep the screws a little loose there is a little play. I do have a version of this horn that the M2 screws are very tight (need to be threaded through). If you would like that version posted as well let me know. I tighten the M2 screws all the way on this horn.

Your done! I hope you like the print and it works well for your build!

Material List:

• 1 - M3x8 Stainless steel countersunk head socket screw
• 2 - M2x8 Stainless steel bolt (any head should work fine)
• 1 - Sweet 3d printed round servo arm!

Some notes: 

• This was built to use an M3x8 Countersunk Head socket so I could print without supports. Also it help make it so no bolt would stick out of the servo horn. 

  Image of servo horn not bolted to the adapter. (Note: very hard to bolt this on to adapter if you bold on servo first. Follow instructions above.

• 

  Thank you @3dprintbox for your design. I did make this from scratch and not base it off his at all. I just wanted to improve some issues I had.