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Using steel spur's what kind of loctite should i use on pinion? Blue or red?

Using steel spur's what kind of loctite should i use on pinion? Blue or red?

Old 09-28-2014, 01:43 PM
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Default Using steel spur's what kind of loctite should i use on pinion? Blue or red?

Using steel spur's what kind of loctite should i use on pinion? Blue or red?

I am using blue... and just want to know what people are using on their 1/8 machines!
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Old 09-28-2014, 01:52 PM
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I use blue on my pinion as well. The steel spur should not affect what loctite you use on the pinion. Red loctite is only necessary in extreme cases.. Another trick I do to get my set screw to stay is I grind the bottom of the set screw flat with a dremel. This adds to the contact area. It seem trivial, but it has been the reason some pinions have stayed on when nothing else worked.
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Old 09-28-2014, 02:05 PM
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Originally Posted by IOP_Racer View Post
I use blue on my pinion as well. The steel spur should not affect what loctite you use on the pinion. Red loctite is only necessary in extreme cases.. Another trick I do to get my set screw to stay is I grind the bottom of the set screw flat with a dremel. This adds to the contact area. It seem trivial, but it has been the reason some pinions have stayed on when nothing else worked.
Thanks for that tip... so you are sayin make it flat to have more contact surface... nice tip i think!

And when the set screw get extra torque and twiste at the end...should i get a new pinion or a new set screw?
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Old 09-28-2014, 02:33 PM
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flat screw + blue loctite

buy pinions using M4 screws if you can
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Old 09-28-2014, 02:49 PM
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Originally Posted by Pulse_ View Post
flat screw + blue loctite

buy pinions using M4 screws if you can
Can say what brand are those?
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Old 09-28-2014, 06:29 PM
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The tekno pinions have large m5 set screws.http://www.teknorc.com/product-category/pinion-gears/
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Old 09-28-2014, 07:05 PM
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Blue lock tight is good. My tip is a bit opposite of what others in this thread suggest. Set scews have a "pointed" tip so they can ever so slightly dig into the rotor shaft in order to stay put. When I first started in 1/8th scale I was always having pinions come loose. After a while I realized I was using the same set screw over and over. The end was flattened by the repeated tightening and un-tightening. I started replacing set screws once the tip flattened. Haven't lost a pinion since.
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Old 09-28-2014, 07:12 PM
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Another option : Ofna/Hobao pinions which have 2 set screws
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Old 09-28-2014, 07:17 PM
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I have used the Tekno pinions and really like them! They also have a 2.5 mm head which allows a lot of torque to be applied without fear of them stripping.
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Old 09-29-2014, 05:38 AM
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Do not use red loctite on anything. And if you do know it must either be eaten off chemically with acetone or by cooking it with the tip of your soldering iron.

In any case, while it is stronger than blue, it is not practical if you every plan to take the screw out again.
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Old 09-29-2014, 06:33 AM
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Originally Posted by targetingxmod View Post
Can say what brand are those?
Originally Posted by wittyname View Post
The tekno pinions have large m5 set screws.http://www.teknorc.com/product-category/pinion-gears/
sorry I meant M5 not M4 and yes the tekno ones are the ones I'm using



tried many brands and they have been the best so far.. anything tekno designed is well designed
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Old 09-29-2014, 06:30 PM
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one thing that helped me was to put some loctite on the motor shaft itself as well as the set screw. Times when the pinion let go with loctite only on the set screw never happened when i did this. more effort to get the pinion off, but nothing elaborate.
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Old 09-29-2014, 06:43 PM
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A dab of the green thread lock on the motor shaft has worked well with blue thread lock on the set screw if I am having trouble keeping it on.
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Old 09-29-2014, 07:29 PM
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The only red loctite I use is red loctite 263. It bonds beter than blue 242 and breaks free easier than red 271. Usually this is the red loctite that comes in most kits so i usually just order another bottle from amain when i run out.

If you have never tired red loctite 263 i highly recommend it; it is the best of both worlds.
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Old 09-29-2014, 08:54 PM
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Do you have a part number from Amain? I couldn't find it on the site.
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