Need help finding long screw for servo horn

[kranswall]

I have a Hitech HS-645 MG with a War Pig winch spool. Does anyone know what type of long screw I need to hold it on and where I can get it? It needs to be about 16mm long.

[The Violator]

Hitec sells a pack of screws but none are that long. ALSO, hitec uses a funky threading so it might be a tough road. Maybe get ahold of the spool maker to see what they use.

Edit: 2.6mm x what ever length you need.


http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXTW34

longest is 12mm in this pack.

[War Pig]

Drill out and tap the servo to 3mm, that is my recommendation to everyone. The servo gear/spline is aluminum so it's easy to do. Makes it easy to find the screw, replace one and torque the thing down.

[kranswall]

Thanks for the help, and the quick replies!

Sent from my ADR6400L using Tapatalk 2

[The Violator]

Originally Posted by War Pig

Drill out and tap the servo to 3mm, that is my recommendation to everyone. The servo gear/spline is aluminum so it's easy to do. Makes it easy to find the screw, replace one and torque the thing down.

I thought it was steel. Maybe just on the stronger servos, or are all the hitecs AL.

[War Pig]

Originally Posted by The Violator

I thought it was steel. Maybe just on the stronger servos, or are all the hitecs AL.

645 is aluminum
5955, 7955, 7950, 7980 etc all are titanium

[40 grit]

Mcmaster Carr

M2.5—Pitch: 0.45 mm
5	50	92290A055*	6.38
6	25	92290A056*	4.89
8	25	92290A058*	4.94
10	50	92290A060*	11.98
12	25	92290A062*	6.19
16	10	92290A065*	6.21

[rchrdwiid]

screw size for Hitec servos are m2.6. m2.5 screws will not stay tight and have fallen out for me. a 10 or 12 mm long screw should be long enough.try pressing the pulley on a little further, the splines on those pulley are small and require more force to seat them properly. good luck.

[jebster]

Originally Posted by War Pig

645 is aluminum
5955, 7955, 7950, 7980 etc all are titanium

i know i'm pulling up an old thread. i have a servo winch that is going to have a custom spool that is a fair bit wider than any 2.6mm screw available. the servo i'm using is a 7955tg. seeing this thread has me concerned about drilling/tapping it to a 3mm, which was my plan. anyone done that before? advice?

[jebster]

worst case i have a 645 also. not ideal but would i simply be able to swap output gears between the two give drilling/tapping the 645 gear would be easy?