mortiser problem

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Forum topic by Jeff82780 posted 11-01-2011 06:42 AM 1481 views 0 times favorited 9 replies Add to Favorites Watch
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204 posts in 4274 days

11-01-2011 06:42 AM

just purchased my first benchtop mortiser and i love it. well….....except for the fact that everytime I use it the auger bit slips from the chuck. Has anybody else had this problem? any suggestions?

9 replies so far

View Rick  Dennington's profile

Rick Dennington

7175 posts in 4474 days

#1 posted 11-01-2011 06:55 AM

Nope…..never had that problem. Mine works perfect. Check your set-up. I’ve had mine for 14 years, and cut a lot of mortises….Push the auger all the way up into the chuck, then let it drop down about 1/16”, and tighten the set screw on the front. Make sure bit and auger are secured good in the chuck…...

You didn’t mention what kind of mortiser it is….

-- " There's a better way.....find it"...... Thomas Edison.

View Howie's profile


2656 posts in 4202 days

#2 posted 11-01-2011 12:55 PM

Make sure you tighten all three places around the chuck.

-- Life is good.

View Jeff82780's profile


204 posts in 4274 days

#3 posted 11-01-2011 01:04 PM

im an idiot. i never noticed that there were 3 holes to tightenin the chuck. i only tightened 1 hole. i will try this when i get home from work tonight

View Jeff82780's profile


204 posts in 4274 days

#4 posted 11-02-2011 05:42 AM

well still no luck! i took the chuck off today to inspect it and everything looks fine to me. I guess my only option is to but a new 3/8” chuck. any recommendations?

View HerbC's profile


1821 posts in 4139 days

#5 posted 11-02-2011 05:54 AM

Is this a new item or did you buy it used?

If it’s new, the manufacturer should make it right.

If it’s used, you’ve just had a refresher lesson in “caveat empor…”

Good Luck and …

Be Careful!


-- Herb, Florida - Here's why I close most messages with "Be Careful!"

View Sawkerf's profile


1730 posts in 4348 days

#6 posted 11-02-2011 06:04 AM

Are you installing the bit and chisel EXACTLY per the instructions? I just got the Powermatic 701 and had problems until I read and followed the instructions to the letter.

-- Adversity doesn't build reveals it.

View Jeff82780's profile


204 posts in 4274 days

#7 posted 11-02-2011 10:35 AM

i bought a used craftsman on craigslist. however it looks like it has not been used. when i bought it half of the parts were still in the original packaging. I also am doing what the instructions say.

View Greedo's profile


473 posts in 4240 days

#8 posted 11-02-2011 02:06 PM

does it just slip out or does it get stuck in the wood and gets pulled out by raising the mortiser?
i have had the latter happen a few times in very hard wood. Are there deep scratch marks on the bit where it slips from the chuck? if so you may want to sand them smooth, if not you may want to add scratches to give a grip surface.

Also check if there isn’t oil on the chuck fingers.

do you have other size bits and does it happen with those also? if not try with a regular drill bit to see if the problem is the chuck or the auger bit.

View Billp's profile


804 posts in 5479 days

#9 posted 11-04-2011 01:23 PM

I agree with Greedo good advise, one thing I didn’t know was you need to sharpen mortise chisels. Nbeener taught me that one look up sharpening hollow mortise chisels on LJ’s search engine.

-- Billp

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