Mortising attachment for a delta 17-950l drill press?

I think you can attach the yoke directly to the quill. My impression is that the collars are there for adapting to other sizes of quills.

My drill had a metric measurement. Had to get the collar specially made at a machine shop.

-- Lew- Time traveler. Purveyor of the world's finest custom rolling pins!

I had to do the same thing. I have a Jet 15” bench drill press I bought last year. Fine Woodworking rated it tops in their 2009 Tool Review issue. Then recently I needed to make a bunch of mortises for a bed frame I’m building. I ordered the Jet mortising attachment because I don’t have the space for a dedicated mortiser. When it arrived, found out the yoke didn’t fit my quill. Called Jet and they told me to have a spacer made at a machine shop. I drew up plans for the collars on SketchUp and took it down to a local machine shop. They just called me yesterday and told me they’re ready. Total bill….....$95.00!!! Wow. That’s more than the mortising attachment cost me. I’ll drive to town tomorrow and pick them up.

I would attach it directly.

Good luck with the kit. I had one and absolutely hated it!

-- Laziness minus Apathy equals Efficiency

I had the same problem with my Ridgid DP . I found a quill(60mm) to fit it at Grizzly for 30 bucks. My bits were 5/8 and it was 3/4. Down to Tractor Supply for a 3/4×5/8 brass bushing..problem solved. Works good.

-- Don't rollerskate in a buffalo herd

you sure you don’t have the room for a dedicated mortiser? They have a very small footprint. I had the drill press version once and found set-up was a pain and everytime I got it set-up I seemed to need the drill press! plus I wasn’t happy with the results…there seemed to be a lot more flex in the column than one would think.