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+1What Do I Gotta Do To Get A Pinion Gear To Last!?
What do you mean? Are they coming loose or are they just wearing quicker than you think they should. Your post does not tell us what your problem is. Why do you have to re-install them?
If it's coming loose, file a small flatspot onto the motor shaft where the grub screw sits when it's tightened if it doesn't have one?
This....
There is something you are doing wrong there. Need to rethink your procedure.
I have never eaten any pinion, Stockers or any of my Teknos. Mine never come off or loosen. Has happened to all of at some point. But is very, very rare for me. I cant remember the last time it happened for me. And I only use Blue TL. The stocker pinions are garbage FWIW.
Pinions teeth can normally wear out at some point, faster if the mesh is set too loose. The smaller 11-13T pinions seem to wear out the fastest. Any pinion can get bricked if you run in the sand or pebbly areas. This chews up the Teeth.
As far as Grub screws... They are consumables at some point, Have spares on hand. Like @1coopgt stated above, grind a roughened flat spot in the Grub screw. I do this also. I've done this for years. It does work.
A good Hand hex driver is key for proper torque.
I hope you are not using the "L" wrenches!!!!!!!!!!
Will be a fail always.
>> I set my Pinion's Mesh always on the tighter side. For the greatest Tooth angle contact between the spur and Pinion.
Yet always with the slightest "Tick" of backlash.
Pinions and Grub screws and the Armatures Shaft "Flat" need to be very clean, for the TL to work well. Then let cure.
I use Blue 243 TL. It works around Oily screws better than Blue 242. But I still clean all very well. Using a torch will remove any old TL that remains.
>>>>Definitely grind down the Grub screw a bit before installing. Even better if you don't reuse the old grub screw after several removals. Or is questionable, because it loosened already. Have spares on hand.
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