Bushed Brushless

Just noted that the "Donkey" branded outrunners at HK are using bushings instead of ball bearings. Their cheap too and stocked at the USA warehouse.

 

You may want to amplify this comment for those of us who aren't mechanical engineers.

 

The Chinese are copying Ming's improvement to their brushless motors.

 

Them Chinese never have an original thought...

 

Neither do I, that is why I'm not a PhD.

 

The Donkey Hobbyking.com motors use self lubricating sintered bronze bushings (Oilite) instead of ball bearings. The bushings are more forgiving in a marine environment over ball bearings and will give better and longer lasting service. They will only require an occasional drop of oil to keep things rotating smoothly.

Primer in self lubricating bearings: A primer on self-lubricating bearings

Better?

 

If I recall, many of the early hobby grade brushless motors were bushed.

 

Thanks, Steve. I knew the difference, but many on here may not have...