Downsides to using a mortising attachment in a drill press?

Hey Jonah
My experience with a drill press attachment was any thing but good . The mortising attachment would keep coming loose. it takes a fair amount of pressure to mortise and I think it’s difficult for a bolt on attachment to hold up to that. I think I’ve seen Mortisers for around $ 175 at ether or both Harbor Freight or Grizzly . I don’t have experience with either one of those brands but maybe others hear have. Even though there more expensive they work better in my experience.
Welcome to Ljs
http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=35570

-- Jim from Heirloom Woodshop, custom furniture ,maker, woodworking school, http://www.heirloomwoodshop.com/

A mortiser requires a fair amount of leverage from the handle when plunging the chisels into the piece. You can’t get much from a standard DP handle. The mortisers have much longer handles. If you don’t do a lot of mortises, the $100 HF mortiser works pretty well with some mods to the hold down device.

-- I've gotta stop treating this stuff like it grows on trees...

Thanks for the replies. My brother actually has that Harbor Freight mortiser, and he says he regrets ever buying it. He’s had nothing but problems and hasn’t even used it more than a few times. I generally like to stay away from those kinds of tools.

What about making some kind of clamp-on handle to increase the amount of leverage on the drill press? With a little ingenuity, it shouldn’t be hard.

Hey Jonah
Take a look at Grizzly I have had a lot of there tools(but not the motiser) and they work great . the grizzly is around $225. Some times it’s hard to find good tools inexpensively. Maybe You can find a used one. I have had a delta for years and its worked well and I have a tilting head floor model also. adding leverage is only half the problem, the other half is to have the mortiser stay on the drill press. If you can’t make a real mortiser work in your budget go for the router option.

-- Jim from Heirloom Woodshop, custom furniture ,maker, woodworking school, http://www.heirloomwoodshop.com/

I firmly believe that drill press mortising attachments were put on this earth strictly for those who want to hate themselves for whatever reason. I know there will be someone who likes them or has had success with one. I also know that there is a fellow who (eventually) made a beautiful dresser using only a pocket knife. However, I know of no tool that is so close to universal dislike as is the drill press mortising atachment.

Drill Press Mortising Attachment Review

-- Tom Hintz, www.newwoodworker.com

I bought a drill press mortising attachment ($80) a couple of years ago … tried it out, and returned it. Couldn’t get enough leverage to cut at 1/2” x 2” deep mortise in red oak, and it was a pain to get it aligned and keep it that way.

I bought a Jet JBM5 on sale ($230), and have been happy with the results. I did find that using a blade lube (e.g. OptiCut XL) on my hollow chisels and augers seems to improve performance.

-- The only place success comes before work is in the dictionary. -- Vincent T. Lombardi

if you’re planning on doing lots of mortises and are on a strict budget – stick to the router for now, while keeping an eye on craigslist and ebay – every once in a while you’ll see a Jet or similar mortiser for sale at $100-$200 range.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

I have to second TheDane and TomHintz opinions. The guys that I bought my used drill press from threw in his Delta Mortising attachment (I now know why). I have used it on a handful of projects. I hate using it. It is a pain to setup. Since you don’t have a lot of leverage, it is hard to cut a mortise. When I have enough money or a project with a lot of mortises, I’m going to get a real mortiser.

Good luck.

-- - Jim, Vancouver,WA

I have one and I like it, but not using it the way it was designed. I don’t hook it up to the drill press. I put a forstner bit of proper size and drill out the majority of the waste and then use the hollow chisel bit without the drill to clean up the corners with a hammer. Heh. I also use mortising chisels, but those hollow attachments make a great corner. Got the idea from this. I really like the things that guy comes up with, recommend checking out his whole channel. In fact I think I might have to post a blog entry. Anyhow maybe that’ll help. The bits aren’t too expensive really.

-- Ooo, er.

Skarp, thanks for the link. That guy is good :-)) strainght to the point, not trying to be a comedian when he isn’t funny.

-- Debt is nothing more than the 21st Century's form of slavery.

jonah,
I have used the delta mortising attachment on a delta drill press before and it worked fine. You do have to spend a little time setting it up. My Delta drill press is a large floor model and it did provide the necessary leverage needed for this attachment. All the tools I use in the shop require set up however and constant checking for precisionm however. I have recently purchased a dedicated mortising machine however, because I do a lot of mortising and wanted a dedicated machine. It takes just about as much time to set my dedicated mortising machine up for all the different size and depth of mortises as it does to set up the delta attachment on a drill press. If you have a drill press that is capable of handling the necessary leverage required for the attachment they will work fine. I used mine for years until I could justify getting a dedicated machine which does the same job. Both get the job done equally well once you start pulling the handle. I’m not sure that this helps much, but it is my best observations after having done this both ways.

Sincerely,
Ken McGinnis

-- woodbutcher north carolina

Thanks everyone for the information. I think I will wait and save my money for a decent mortiser. I don’t cut enough of them to really be bothered by doing it with the router, and I could use the excuse to come up with a jig for holding pieces to easily rout out mortises.

Jonah, I have a floor model, 1 hp drill press that I made into a dedicated mortiser about 10 years ago. I added a sliding vise, which holds the wood and is easily adjustable. I also took the handles off and installed one 3/8” all thread rod, with a 1/2” copper pipe over it. This gives me plenty of leverage. I had looked at mortisers a few years ago and it was cheaper to buy another floor model drill press, so I did that. I like the ability to mortise into any thickness of material, I can even punch square holes in the end of 42” pieces of stock. I can control the drill speed also with this machine. I use this set up all of the time and have punched 1,000’s of mortises with it. You may do better with a mortiser, but I believe they can be just as fussy as a drill press for set up. That’s my $0.02 worth.

-- Tim

That drill press is a heck of a lot beefier than my benchtop POS, though. Nice to hear someone has had some success though.