Jet 708582 JMA-582 Mortising Attachment

this item has been a trying piece of equipment but I can now work with it easy

Does not fit my JDP-15M. Not happy at all. Not sure what I'm going to do. Looks like I'll have to spend the money on a dedicated mortiser.

Jet's mortiser is heavy, well machined cast iron but the hold downs were not bent to the same radius or cut to the same length. This doesn't effect how I use the system but it may be a consideration for anyone who will not develop their own hold down and fence system to work with their particular drill press.The fence is a piece of hollow plastic that needs some better way of being clamped tight and square to the drill press's table. (Assuming you can square it with the chisel mounted in the chuck.)I would suggest buying the chisels from Jet. They are better than the two 10 year old chisels I have from Delta. These chisels and bits are really sharp! Mine have stayed that way although I haven't pushed them through anything harder than soft maple.Be prepared to spend a lot of time setting up this mortiser to your drill press. Make engraved markings on the drill press head and chuck "shoulder" to readily square the mortising attachment to the table and fence. I would recommend that you build your own fence system and hold downs.

It will not fit any of my drill presses

Poorly thought out!The Fence is cheap plastic and has an angled face (about 2 degrees). Locates poorly (restrictive locating) my Jet floor model drill press that has a round table.Recommend you buy a kit that has a cast iron locating rail.

I considered purchasing (well reviewed) this item but also wanted a mortising attachment that I was sure would fit. I called Jet to see if there is a mortising attachment that will fit. Jet tech support said "no, they don't make mortising attachments any more" and they "don't know who does". Jet tech support offered no assistance what so ever and did not seem to care at all whether I bought this unit or not. Guess I'll find another unit.

This mortising attachment was purchased for use with the Jet JDP 17MF drill press. The first project was making 3/4 inch mortises in hard maple. The drill press set ring replacement in the mortising attachment would not remain in place under the pressure needed to attempt the mortises in hard maple. This product may work on soft woods or with smaller sized mortise chisel/bits but don't try large cuts in hard woods.The fence that comes with the attachment is not compatible with the Jet Drill Press Fence (709109). Quick modifications can be made so that the "hold-down" part of the attachment will attach to the fence, but when extracting the chisel/bit with hard wood, there is enough upward pressure to pull the t-tracks up away from the fence table.After having tightened the set ring replacement as much as possible and still not having it hold, it may be tempting to over tighten the regular set ring when you remove the attachment to use the drill press in its standard form. CAREFULL. The set ring can crack and break if overly tightened.A real disappoointment.