Help! 4018 Brushless Outrunner Motor 900kv replacement shaft


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Here is how I make my own replacement shafts.

Finding the correct size of stock materials is the most difficult part of the process. I have had success using music wire, nails and suitable stock from eBay. I have found these 3.17 mm shafts . I just received some today they’re look like they will work fine. All you will need to do is grind or file a flat spot for the motor bell to engage.

I also used this stainless steel stock, it comes in 3, 4, 5, 6 & 8 mm. With this material, you will need to grind a slot for the clip. I chuck it in a drill and use a Dremel with the cheap cut off wheel to cut a slot. Don’t use the heavy duty wheel, it’s too thick. Be sure to wear safety glasses. Secure the drill, spin it up and with a steady hand cut the slot. On my first few attempts I cut the grove too deep. Just cut it off and try again. The Dremel also work great to grind the flat. The setup takes longer than the process, I will make several at one time.

For me this is a quick and easy way to breath new life into a motor. Like anything else it will be awkward at first but will become easier the more you do it You might want to order some extra E-Clips also.


Active member
Update: I am totally not satisfied with this answer, because it would mean I have throw away my pristine motor. What were you thinking Hobbyking ?! when you send me this answer.

Hi Nik,

Unfortunately, we do not have a replacement shaft available to provide for the 4018 Brushless Outrunner Motor 900kv.

I'm going to close this ticket for documentation purposes. If you have any further questions, you can still reply to keep the ticket open, or open a new ticket for assistance.


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