Motor sizes explained

[olds97_lss]

For the 1406 -
The diameter is 14 = 1.4" = 35.5mm
The rotor length (not can length) is 06 =0.6" per castle specs, this motor can is 49.5mm long. So this is a 540 size motor.

For a 1410, same 1.4"=35.5mm can diameter, but the rotor is now 1.0", and the can is 53mm, so a 550 size motor.

For the 1415, same diameter, but the rotor is 1.5", can length is 70mm. So 3670 size

Interesting, though, the 1515 is listed as 75mm long, even though it has the same 1.5" rotor length. 1515 = 4075 size.

Thanks for taking the time. I figured the numbers they assigned were relevant, just wasn't sure how. One would think that one of the most popular companies out there would label their stuff like everyone else so as to avoid confusion.

 

[Jerry-rigged]

Thanks for taking the time. I figured the numbers they assigned were relevant, just wasn't sure how. One would think that one of the most popular companies out there would label their stuff like everyone else so as to avoid confusion.

I expressed the same thought in RCTech, and was told that pretty much every non-china motor company uses (stator diameter)(rotor/magnet length) for all brushless motors, both in runner and outrunner. Then the cheap China motors came along and started selling inrunner motors biased on the can size. Out runners still use the stator
/rotor sizing.

 

[jamesbcn]

To be honest I just know that a castle 14 series is 36mm wide and 15 series is 42mm wide, and 17 series is 45mm wide

I think Cordova motors work this way too.

 

[olds97_lss]

Still, it's kind of odd. I guess it doesn't matter much as you can go to castles site to see the diameter/length. Just isn't as convenient when searching for say a 3660 motor via google.

 

[Walküre]

This is gold. Saved to my desktop.