Retrorockit wrote: ↑
Dec 08 2019 10:23am
knutselmaaster wrote: ↑
Dec 08 2019 10:13am
Metal has a bigger expansion under temperature change than plastic.
If the bearing was any bigger (or the gear smaller) the gear would crack when the motor gets hot.
Disadvantage is that it will slip when it gets very cold.
I think the glue will crack too if it hardens a lot, as it has no expansion under temperature changes.
One should use some king of flexible glue compound.
Loctite makes several products for this purpose. Loctite Bearing Mount. Different strength, and gap filling properties. Henkel and Permatex have similar products also.
When pressing the bearing out you should support the metal sleeve in the blue gear so it doesn't move. Usually when doing this you can find a couple of sockets that will fit the bearing, and support the gear and use a vise to press them apart.
Yes, there are several products that can do the job.
One needs to be very careful though to choose the right one.
The regular loctite bearing mount won't do the job (forgot the number, it's the transparent green one that smells sweet) because it hardens too much.
It will brake off in small very hard bits that will transform the grease into an abrasive material, causing the blue gear to wear incredibly fast.
Be very careful advising these kind of products and be precise (loctite number).
If it solves the slipping problem after applying it, it doesn't mean that it will be durable and that it doesn't do more harm than it does good in the long run.
@cassainho, in my humble opinion you shouldn't add this to the wiki without thorough testing and examination after 1000+ km of use in all temperatures.