Outrunner Spindle
I’d like to make a small-lightweight spindle for a tiny CNC.
Here’s a candidate. The Turnigy X500-4000.
I think mounting the motor and my ER11 shaft will be easy, the question is how to couple the 5/16″ ER11 to the 3.175mm shaft? I measured the ER11 to be .3125″ or 7.95mm. I’m thinking a pulley or gear system with about 3:1 ratio? I think this is a helicopter motor, perhaps some helicopter parts might be worth considering. I guess it’s a 450 sized helicopter motor so there will be gears available.
Turnigy E500
Turns: 6, Kv: 4000rpm/V
Power: 200W
Resistance: 43mh, Idle Current: 1.9A, ESC Required: 20A+
Especially designed for 3-4Cell lipoly. This motor is made for 450 size helis. Making it an excellent upgrade for the Aling T-rex and other similar helis.
Diameter: 28.4mm
Length: 31.6
Shaft: 3.175mm
Weight: 57g
Here it is on the full voltage.
Candidates:
Our shop: https://www.bantamtools.com/collections/spare-parts/products/othermill-pulley-belts
McMaster: https://www.mcmaster.com/94115K119
Gear1 5000 rpm at 12v
Prior art:
http://www.mycncuk.com/threads/3793-Diy-Brushless-Spindle
https://www.kickstarter.com/projects/1029697729/evo-one-desktop-cnc-mill-made-for-anyone?ref=discovery&term=cnc%20mill
https://www.kickstarter.com/projects/otherfab/the-othermill-custom-circuits-at-your-fingertips?ref=discovery&term=cnc%20mill
http://www.dieselrc.com/projects/cncspindle/