Model # 870

Internet #203219283

General Tools Mortise and Tenon Jig

General Tools

Mortise and Tenon Jig

  • All-in-one solution to quickly cut a matching mortise and Tenon
  • Can be mounted directly to a workbench or clamped in a vise
  • Can cut ultiple mortises in a single long piece
$9342 /each

Frequently Bought Together

Product Overview

General Tools has grown to become the recognized industry leader for specialty hand tools and instruments. This trailblazing tool provides a quick and easy, all-in-1 solution to cut both a matching mortise and Tenon with a single inexpensive jig. The Mortise and Tenon Jig is ready to use right out-of-the-box to produce 1/4 in. mortise and Tenon joints for cabinets, furniture and frames. Included are the bushings for also producing 3/8 in. and 1/2 in. joints. Using a plunge router with the jig, woodworkers can cut fully aligned mortises and tenons ranging from 1/4 in. to 1/2 in. W and from 1 in. to 3 in. long. The unit can be mounted directly on a workbench or onto a board that can be clamped in a vise or to a bench. The Mortise & Tenon Joint has been used for thousands of years, but not until now did someone figure out a way to provide a quick and easy, all-in-1 solution to cut both a matching mortise and Tenon with a single inexpensive jig. The unit can easily handle stock ranging from 1/2 in. to 1-1/2 in. T and can cut multiple mortises in a single long piece.

California residents: see   Proposition 65 information

  • Accommodates stock from 1/2 in. to 11/2 in. T and any length
  • Mortise and tenon thickness: 1/4 in., 3/8 in. and 1/2 in.
  • Quick change router base bushing assembly consists of the following:
  • 1-quick change 1-3/16 in. guide sleeve and locking nut
  • 1-1/4 in. guide bushing (1-1/4 in. O.D.)
  • 1-1/4 in. shank centering pin
  • 1-flat spanner wrench for guide sleeve locking nut adjustment
  • 1-3/8 in. guide bushing
  • 1-1/2 in. guide bushing
  • Kit also includes one 1/4 in. straight up cut spiral carbide router bit and an alignment tool
  • All in-one solution to quickly cut matching, professional quality mortise and tenon joints
  • Can cut multiple mortises in a single long piece
  • Accommodates stockfrom1/2 in. to 1-1/2 in. T and any length

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

what is the product made of?

Asked by: Steve
Die cast aluminum jig body. Unfortunately, it is not machined well.
Answered by: fg
Date published: 2016-12-16

does one port make the mortise and the other port make the tenon.can boards go in in any direction

Asked by: mike
Answered by: fg
Date published: 2016-12-16

Is a plunge router required?

Is a plunge router required?
Asked by: 3D
Answered by: Diane Hewitt
Date published: 2017-01-04
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Customer Reviews

Mortise and Tenon Jig is rated 2.8 out of 5 by 13.
Rated 2 out of 5 by from 2 Star Review Rating provided by a verified purchaser
Date published: 2017-04-22
Rated 1 out of 5 by from Device was very awkward to use and wielded poor results! Although this jig is fairly well made, it does not live up to its advertised flexibility and ease of use. Right away I learned that it was not made to accept mortise stock that was less than 2" wide, which is what I was using for a cabinet face frame. It offered two workaround suggestions: the first using a shim to make of the difference in width and then setting the bit depth that much deeper. It was very difficult to make sure the hole position was centered when it was over 3/4" below the surface of the jig. Tenons proved even more of a challenge to properly align and hold in place. The brackets that hold the boards in place are narrow and are tighened by thumbscrews that make it difficult to securely position the wood and it is awkward to find way to get a square in place to make sure the wood is perpendicular. Although it makes a nice looking rounded mortise and tenon, it is just too slow, awkward, and not precise enough for most projects.
Date published: 2012-03-20
Rated 3 out of 5 by from Fair product, but could use some improvements. This jig was easy to set up and use if you follow the directions, but it could definitely use some improvements. The plastic top guides should be metal. They are a bit sloppy and I don't see them holding up to heavy use. Also, the clamping does not square up pieces easily. Take great care making sure your stock is completely where you want it in the jig. It is very easy to be off by 1/16th of an inch from one end of the mortise or tenon and really screw up the joint. I see myself making quite a few jigs to hold wood in this jig, making sure I have a repeatable cut. Other than that, my first project I did with this jig was a pretty big success. I couldn't have done all the joints without something way more expensive than this.
Date published: 2013-01-29
Rated 1 out of 5 by from Very finicky to adjust I thought it was just me but after trying about 10 times with different configurations, I finally can say that it's very difficult to be repeatable and accurate with this jig. If you clamp a hair out of line, which is difficult to say on the jig you only know when you dry fit, you are gonna be out of alignment..... I would not use this on expensive wood.... In fact, I would not use it at all.
Date published: 2016-02-10
Rated 1 out of 5 by from Absolute junk. The way this item is shipped is with an 1 1/8" guide bushing for 1/4" mortise. W... Absolute junk. The way this item is shipped is with an 1 1/8" guide bushing for 1/4" mortise. Well, the guide bushing is steel and the bushing size is 1.131 to 1.136 on my precision Brown and Sharpe caliper, far over 1.125 as it should be. Plus in the spec is a bad idea friends because the tool won't work. And the fact the caliper is out is bad news. I could not get the guide bushing to flow through the jig body to cut the basic mortise. So I looked more closely at the jig and the jig body is aluminum and the aluminum is not machined, but cast where the guide bushing runs. I tried to file/sand the guide slot to manage the oversize bushing, but finally gave up after an hour or so of sanding and filing. The guide bushing also has no chamfer, so the edge of the guide bushing is also cutting into the aluminum jig body everytime I try to pass it through the jig. After you cut a number of tenons, this thing is just going to get all marred up. The alternative will be to cut 1/2" mortise by using a 1/2" spiral upcut not supplied, but at the end of the day, you'll still have to try to make the jig better to be able to use it. I am calling customer service tomorrow for a resolution and will update.
Date published: 2016-12-16
Rated 4 out of 5 by from Cool little jointer Jig My brother and I wanted to learn how to cut mortise and tenons for a repair job on our family kitchen table. We did a lot of research to find the right tool that we could also share, but all the jigs we looked at were big and costly. We finally settled on General’s Mortise and Tenon Jig because of the price and its size. We spent some time following the manual and watching the video and eventually figured out how to do the set-up and cut the mortises and the tenons with good results. The knobbed screws, used to tighten the jig to the stock are kind of small but they held the stock steady during routing anyway. The jig came with all the stuff we needed, including a very helpful centering device for aligning the router base with the router collet. All in all, once we got the hang of it, we were able to create the needed mortises and tenons for our table repair project. General’s little jig worked great for us and we would recommend it to anyone.
Date published: 2012-05-04
Rated 3 out of 5 by from Effective, but with limitations. Mortise depth and tenon length limited to around 1.25 inch making a through mortise on a 1.5 inch leg difficult. You must route from both sides making setup awkward. Mortise on 1.5 inch stock difficult because of limited clamping surface. (Spacers required to ensure 1.5 inch stock is within reach of the built-in clamps again limiting the reach of the router bit) Consistent mortise and tenons on several alike pieces difficult because of the amount of interpolation required. However, consistency is attainable with practice. Pieces can be re-inserted within the fixture to correct errors after becoming more familiar with the various features.
Date published: 2012-12-26
Rated 5 out of 5 by from Have not had a chance to use this yet, but I did un-box to inspect and it seems to be well made a... Have not had a chance to use this yet, but I did un-box to inspect and it seems to be well made and with easy instructions should be easy to set up. Purchased at a very reasonable price and I am pleased with the purchase
Date published: 2016-12-14
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