Mounting a drill chuck on a 1/2 inch motor shaft (unthreaded)

[IronWing]

I have a motor with a half inch diameter shaft with a flattened side for seating a set screw. I want to mount a drill chuck on it. The chucks I have found so far have had threaded mounts or tapered mounts. Any ideas on where to find a chuck with a half inch, set screw mount?

Something like this but in a 1/2 inch mount.

 

[C1]

There are at least a couple ways to handle such matter.

- Mandrel or arbor adapter
( https://www.fastenal.com )
( https://www.fastenal.com/products;j...ryl3:"604167 Adapters, Arbors and Mandrels"|~ )

- Adapter Shim Insert
( http://www.ebay.com/itm/1-2-ID-X-5-...EL-SPACER-STANDOFF-BUSHING-4pcs-/141828498428 )

 

[mindless1]

http://www.ebay.com/itm/1-2-Jacobs-...rbor-Polish-Buff-Grind-Shape-New/371604884707

http://www.grizzly.com/products/Motor-Arbors-1-2-Motor-Arbor-1-2-R-H-/G5550?utm_campaign=zPage
(not sure about the threading on this - no spec provided, I'd ask them for confirmation).

 

[IronWing]

Thanks guys!

 

[Mandres]

This sort of has a "hold my beer and watch this" feel to it. What are you planning to drill with a motor that large?