Aluminium profile cnc build

[Clive S]

The one in my drawing is 20.6 mm and it is exactly the same like in any drawing you could find on internet with nema 23 dimdnsions. Double standard?

Išsiųsta naudojantis SM-G900F Tapatalk 4 Lt

Is your measurement just to the end of the key in the shaft?

http://cnc4you.co.uk/resources/Stepp...1B%203.1Nm.pdf

[routercnc]

My motor shafts don't go all the way through the pulley and have been running fine for years.

If it is more than half way into the pulley and the grub screws have a good lock onto the shaft I don't see any major problems.