Electric motor- rotor- cooling fin broken

Author	Message
Gizmo Admin Group Joined: 05/06/2004 Location: Australia Posts: 5170	Posted: 10:29pm 26 Dec 2011       The motor should work OK with that broken fin. Motors are designed with more cooling than is needed for normal operation, this allows for hot climates, dust build up, etc. So I dont think the missing fin will affect its ability to keep itself cool. Vibration may be a problem though. If it had a even number of fins, I would break off the fin on the opposite side to give it some balance. But it looks like you motor has a odd number of fins, so you cant to that, as there are two fins on the opposide side to the broken fin. So you can either.... 1. Gently file down the opposite two fins by half each. Easy but sacrificing more cooling ability. 2. Add weight to where the fin is missing. I would go for number two. Find a small self tapping metal screw thats slightly heavier than the broken fin, then drill a hole to suit and screw in the self tapper, with some good 24hour epoxy on the thread. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ