Pinion keeps getting thrown off.
 

On my 8te running:

MMM 2200 5s 11/48 rcm motor mount.

The pinion keeps getting thrown off.
Any body else have the same problem and what was your solution - the pinion grub screw is near the tip of the shaft so this must be why but the pinion won't allow me to attach it the other way round!

very grateful for any help!

What I use: http://www.widgetsupply.com/page/WS/...set/XSW4-312DD

Works great whether there is already a flat, or not. You have to get the divit sized right for the setscrew, but it only takes a few minutes. And cover all holes/bearings with tape first. Loctite is also recommended.

Yr setscrew needs to have its end pointed rather than flat when biting to the shaft. If u have a spare setscrew, use it with some threadlock.

i know what you mean...i had the same issue until i put some red threadlock inside the pinion. that always keeps it on tight. i have to use a pinion puller to get it off. LOL

I use threadlock on the motor shaft as well as the setscrew.

Issues
 

This issue has been discused several times on various threads in here. In order to create the best possible circumstances you have to create the best possible setup to avoid issues like this one. Acquire a motor with a longer shaft. Create a better situation where the shaft fits better inside the pinion gear. Grind a divit into the shaft giving your setscrew a better seat for keeping the setup together under any conditions. Use a more condusive pinion gear with a larger setscrew so you can place more torque on the setscrew. Use some sort of adhesive to assist the setscrew with holding the pinion gear in palce, like green loctite on the shaft, and red loctite on the setscrew.

Without actually being able to see your setup, nailing exactly what you need to do is difficult at best. Post up some pics of your setup so we can make a better analysis of the situation, and possibly provide a more exact solution.

Respectfully Jerry Hill Seoul, Korea.

i only use red thread lock and no grub screws, i have never lost a pinion that way, just litely coat the shaft and set the pinion, give it an hour to dry and its set, you will have to use a heat gun or lighter to remove it but it works like magic