For coupling a 10mm boring bit to 1/4 HP motor with 1/2" shaft These are parts for building this boring machine (for making dowel joints in wood): https://youtu.be/Yx-xV6eT8kw

Couple 1/3 HP motor with 10 MM boring bit These are parts for building this boring machine (for making dowel joints in wood): https://youtu.be/Yx-xV6eT8kw