[cncEnthusiast04]

Hello everyone,

First, let me point out where I got the original idea from.

Diy brushless spindle

I would highly recommend a read through if you are contemplating doing this as well.

I have decided that I want to build my own spindle for my desktop cnc. I am trying to keep it as economic as possible while still being fairly quiet and able to light milling on aluminum, wood, and plastics.


Here is the basic design for your scrutiny. All constructive criticism welcome

Basic Features:
ER16 10x100 mm straight shank collet chuck
ER16 10MM X 100MM STRAIGHT SHANK COLLET CHUCK #L27

2 Angular contact bearings
7000B Bearing Angular Contact 10x26x8 Ball Bearings

Brushless Motor

Turnigy 63-54-A 250Kv Brushless Outrunner
same as: XYH63-54

The chuck is mounted directly inside the motor housing, replacing the original shaft.


My current questions are, does anyone know of a US vendor that I could that brushless motor from? I have only seen 1 british and 1 french. Or even know of other brushless motors that features a 10 mm shaft ?

If I go down to an 8mm shaft, my motor options dramatically increase but that makes finding decent 8mm angular bearings hard to find. Also, ER16 chucks with an 8mm shaft have a higher run out.

For the bearings, do you think shielded bearings are worth it? I feature them in my drawing but the linked ones are not. I figured if I used shielded, then I would not have to worry about incorporating a labyrinth seal. I plan on having the bearing - housing fit be a light press fit. I have read that bearings come with a loose fit for the inner shaft.