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
| Manufacturer Part Number | TAMB-12 |
|---|---|
| Weight | 0.4200 |
| Tech Spec |
|
4.5 / 5.0
12 Reviews
Nice and strong and sharp, went through rock maple for my NOT-SO-BIG WOODWORKING BENCH. It had a lot of large deep mortises
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another excellent Rockler tool
Excellent for mortising a project I am working on, very precise tool!
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Crafstman compatible
I have an old Craftsman mortizer and the length of this bit works fine.
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Cut Square Perfect
I needed this for some student projects. This worked perfect.
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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.
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Good chisel
Works as advertised. Quite a difference from the old one.
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Didn't use it I didn't know it needs an adapter on my drill press probably would have worked great! !!
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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.
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Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 8 questions
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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
How does the chisel bit work and will it work in a drill press?
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.
- Reply
- Inaccurate
- Jack W on Apr 17, 2015
- Purchased on Jan 24, 2015
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?
BEST ANSWER: The collar is the dimension that fits in your machine.
- Reply(1)
- Inaccurate
- paul o on Dec 10, 2016
- Purchased on Apr 12, 2015
What is the chisel cut length? I need to cut 3" mortise depth
Can you use a mortise drill in a drill press?
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.
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- Inaccurate
- Timothy B on Dec 2, 2018
- Purchased on Dec 9, 2016
will this chisel fit a delta 14-651 machine does it have a 3/4" collar?
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.
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- Inaccurate
- Martha O on Apr 11, 2015
- Purchased on Mar 28, 2015
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.
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.
- Reply(1)
- Inaccurate
- Lawrence M on Sep 23, 2019
- Purchased on Nov 20, 2017
Is it Compatible with the Shopsmith?
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.
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- Inaccurate
- CHARLES M on Jun 27, 2018
- Purchased on Nov 2, 2016
Do the rockler mortiser bits fit the ShopFox W1671 ?
WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.govWARNING: 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.
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