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Mortise Chisel Bit 1/2"

Item #
13757
Rating:
90% of 100

The bit removes most of the material, and the chisel squares up the sides, allowing you to cut precise 1/2” mortises for mortise-and-tenon joints. Fits the Jet Benchtop Mortising Machine (#81421, sold separately). Recommended for use with mortise machines, however, does not work with Delta 14-651.

(1) 1/2" (12.7mm) Mortise Chisel Bit
More Information
Manufacturer Part Number TAMB-12
Weight 0.4200
Tech Spec
  • Shank: 5/8'' (Inner Drill Bit)
  • Overall Length: 8"
4.5 / 5.0
12 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
9
2
0
0
1
Nice and strong and sharp, went through rock maple for my NOT-SO-BIG WOODWORKING BENCH. It had a lot of large deep mortises
March 24, 2020
Purchased
4 months ago
Woodworking Experience:
Intermediate
another excellent Rockler tool
Excellent for mortising a project I am working on, very precise tool!
November 14, 2017
Purchased
over 2 years ago
Woodworking Experience:
Intermediate
Crafstman compatible
I have an old Craftsman mortizer and the length of this bit works fine.
September 27, 2017
Purchased
over 2 years ago
Woodworking Experience:
Advanced
Cut Square Perfect
I needed this for some student projects. This worked perfect.
June 18, 2017
Purchased
over 3 years ago
Woodworking Experience:
Advanced
Works Great
Use it on a 1948 delta drill press with a 1940s mortise adapter at the museum I volunteer . We're restoring a 1913 caboose and use it help speed the progress.
June 14, 2017
Purchased
over 4 years ago
Woodworking Experience:
Intermediate
works great
April 10, 2017
Purchased
over 3 years ago
Good chisel
Works as advertised. Quite a difference from the old one.
January 19, 2017
Purchased
over 3 years ago
Woodworking Experience:
Intermediate
Happy
Great value, thanks
June 21, 2016
Purchased
over 4 years ago
Woodworking Experience:
Advanced
Didn't use it I didn't know it needs an adapter on my drill press probably would have worked great! !!
February 2, 2016
Purchased
over 4 years ago
Woodworking Experience:
Intermediate
Worked great
Never used before, always hired it out. Hickory was used on the railings and foot board, glad I ordered two as I felt they dulled pretty quick. Probably wouldn't have with a softer wood.
March 14, 2018
Purchased
over 2 years ago
Woodworking Experience:
Advanced
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Browse 8 questions Browse 8 questions and 16 answers
Why did you choose this?
Rockler Store
I need them for my mortising machine.
Thomas W on Jun 1, 2020
Husband requested
Branette R on Nov 22, 2019
I need them for my mortising machine.
Thomas W on Jun 1, 2020
For my mortising machine. Don't have the 1/2" bit.
Thomas R on Apr 18, 2020
Husband requested
Branette R on Nov 22, 2019
got a powermatic mortiser
Thomas Z on Aug 30, 2019
Because I needed it!
Jordan Brower O on Jun 15, 2019
Working on a project that needs a Mortise
Richard E on Apr 3, 2019
Replacement
Timothy J G on Dec 28, 2018
REVIEWS
WILLIAM L on Aug 7, 2018
need it
David L on Jul 27, 2018
current bit is too short for my machine....
Carol V on Jun 26, 2018
looking for a quality tool
Abby R on Apr 29, 2018
I needed it now
Barry B on Jan 29, 2018
I think it will fit my old Craftsman Mortizer
Paul B on Sep 4, 2017
Building a crib for my grandson.
Kathy B on Jun 19, 2017
needed for project
Albert W on Feb 17, 2017
needed bits for my old oliver mortiser, the foot pedal one. A piece of equipment my father used at the same high school I went to and used then we had an opportunity to purchase it. Bits fit and work fine.
WESLEY G on Dec 16, 2016
Broke old one
MICHAEL S on Nov 28, 2016
need for work
Mark K on Jul 17, 2016
Making a Bed
Peter C on Apr 28, 2016
After waiting patiently for 3 months for the back-ordered Mortise Chisel to ship, another online woodworking store cancelled my order without notifying me.
Daniel D on Apr 22, 2016
I cut a lot of mortise and tensions in my projects, to me its the best way to go. I finally bought a Jet mortising machine, what a great way to replace using a drill press or router with mallet and chsiel. Needed an extra chsiel as another one would dull. Keeps me on cutting then will resharpen both. Seems a good quality, time will tell.
SirSir on Mar 27, 2016
He needed it.
Susan K on Mar 3, 2016
Decent bits just wish the state sharper longer. But that's just like anything else got to keep sharp tools
wade e on Dec 21, 2015
It will be a great addition to my shop to make drawer building much easier.
Jeff W on Nov 25, 2015
ROCKLER HAD THE 3 SIZES AVAILABLE AND IT WORKED OUT WITH MY FREE SHIPPING<br /><br />THANKS
PAUL W on Jun 14, 2015
For my mortising machine. Don't have the 1/2" bit.
Thomas R on Apr 18, 2020
got a powermatic mortiser
Thomas Z on Aug 30, 2019
How does the chisel bit work and will it work in a drill press?
Keith L on Apr 17, 2015
BEST ANSWER: The bit works great but will not work in a drill press unless you have a special mortise attachment installed. For example, I have a Delta bench top drill press where I bought the attachment from Amazon for 75.00. I can now use any size mortise bit. It is much cheaper than buying an actual mortising machine which can cost as much as 350.00 on up. Hope this answers your question.
I have an old craftsman mortise machine. I need a 5/8 inch shank (or is it called a collar ) for it to work. Will this work in my craftsman?
Scott P on Dec 10, 2016
BEST ANSWER: The collar is the dimension that fits in your machine.
What is the chisel cut length? I need to cut 3" mortise depth
Eric A on Aug 28, 2015
BEST ANSWER: The cutting length is about 2-7/8" long
Can you use a mortise drill in a drill press?
Frank on Dec 2, 2018
BEST ANSWER: I don’t think you can. There would be nothing to hold the chisel portion from rotating with the drill. A mortifying machine actually holds the chisel in place with one mechanism while rotating the drill with the motor.
will this chisel fit a delta 14-651 machine does it have a 3/4" collar?
paul o on Apr 11, 2015
BEST ANSWER: NO it does not have a 3/4" collar. It is 5/8" my husband is a machinest and will be making a 3/4" bushing. He also said that you should be able to buy stock bushing at any berring supply house. Hope this helps.
I just bought a Jet mortising machine which included 3 chisels. I found it took a significant amount of pressure for the chisel to cut through plain whitewood. I set the drill 1/16" ahead of the chisel, as recommended. The pressure needed was great enough that it caused the chisel to twist in the bushing (it is only held in by a set screw) and created an off-line cut. I've never used a mortiser before. Am I doing something wrong? Or did they just send me bad chisels.
AlexD on Sep 22, 2019
BEST ANSWER: That seems odd. If it took that much pressure, something was set up wrong. Usually, the first cut is firm but easily made a little bit at a time. Once there is relief from the first cut the rest are easy. Try another chisel set and see what happens.
Is it Compatible with the Shopsmith?
Steve E on Jun 27, 2018
BEST ANSWER: Steve, the mortise bit “sorta” is compatible with the Shopsmith. My Shopsmith is an ER 10, the earliest model. I was able to get it to work and cut some mortises but would have problems with the drill bit starting to slip in the mortise housing. There is very little room to both the mortise housing to fit above the collar and then get the drill bit far enough into the chuck to hold securely. It gets a little frustrating to have to keep going back to realign everything. If you have one of the later model Shopsmiths it might work better but I wouldn’t know. Happy to answer any other questions if I can be of help.
Do the rockler mortiser bits fit the ShopFox W1671 ?
Glen H on Jul 13, 2019
Prop 65 WarningWARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

Prop 65 WarningWARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov/wood.