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Novak 5000kv disintegrated bearing - replace bearing?

Novak 5000kv disintegrated bearing - replace bearing?

Old 01-27-2013, 12:13 PM
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Default Novak 5000kv disintegrated bearing - replace bearing?

TL;DR - Dead bearing in Novak 8.5t 5000kv. Can I just slot in any sealed bearing of a matching size or is there a certain one I should look out for?

Hi there,

Very new to RC cars and even newer to electric motors. Had mine seemingly locking up and not wanting to work. Seemed ok for a few moments, then wouldn't spin unless I gave it a little help. If I ran it for a little while without stopping it I literally couldn't get it to budge. The motor plate was very hot whilst the opposite end of the motor was fine... so I took a gamble and pulled it down. Turns out the bearing that sits right under the pinion disintegrated about half of the balls and the rest were caught up on the remains. Well, still are.

Can I just slot in any sealed bearing of a matching size or is there a certain one I should look out for?

Cheers

Matt.
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Old 01-27-2013, 12:48 PM
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I get them from Novak when a bearing goes bad, but any bearing of good quality should be OK. You may want to make sure it uses a like oil rather than grease to reduce drag.
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Old 01-27-2013, 02:15 PM
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I usually just get the rubber sided bearings, take the sides off, spray out to grease, and put high speed oil in them. Works better than stock most times, and its easier to maintain bearings with rubber sides.
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Old 01-27-2013, 04:40 PM
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Originally Posted by Chamelion View Post
TL;DR - Dead bearing in Novak 8.5t 5000kv. Can I just slot in any sealed bearing of a matching size or is there a certain one I should look out for?

Hi there,

Very new to RC cars and even newer to electric motors. Had mine seemingly locking up and not wanting to work. Seemed ok for a few moments, then wouldn't spin unless I gave it a little help. If I ran it for a little while without stopping it I literally couldn't get it to budge. The motor plate was very hot whilst the opposite end of the motor was fine... so I took a gamble and pulled it down. Turns out the bearing that sits right under the pinion disintegrated about half of the balls and the rest were caught up on the remains. Well, still are.

Can I just slot in any sealed bearing of a matching size or is there a certain one I should look out for?

Cheers

Matt.
Novak bearings fail frequently because [all that I have seen] are not double shielded. If you hold the bearing up to a light you can see through it where the balls touch the inner race. That's where dirt gets in and starts damaging the bearing.

You can get a quality double-shielded bearing the right size of McMaster-Carr (www.mcmaster.com) and other places. The ones I use are McMaster part number 57155K374.
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