Mounting motor under table?

[Rogue]

I've found 20 tooth 15mm wide HTD to be the best for 1/1 connection. They wear the best and easy available at any bearing company. They also have the best size boss on the pulley for using a decent sized grub screws or small bolts for gripping the shaft.

If you want to up the ratios's say 2/1 or 3/1 then 15 tooth is about the smallest I would use on the driven side using steppers, thou be aware the boss size is too small for decent grub screws so you have to then drill between the teeth and make sure the head of the screws is below the surface.

The stepper & ratio issue is something I've yet to address. I need to work out the benefits of the various ratios first. I'm pencilling in 1:1 until I've had a good think over a hot cuppa.

Get them delivered to me and I'll bore (or ream) them to the right size on my lathe for you. Just pay me the postage...it's only a 5 minute job, if that.

I may well avail myself of your services, though it might be some time away. Thanks!