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Jet

JET Benchtop Mortiser, 1/2" Chisel, 4-3/4" Stroke, 115V 1Ph (Model JBM-5)

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Availability: In Stock.
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Arrives Sunday, Aug 9
Order within 6 hours and 37 minutes
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Style: Benchtop mortiser


Features

  • Column is reversible for mortising larger stock
  • Long, multi-position mortising handle let you reposition the feed handle for easier operation and optimum handle position
  • Powerful 1/2-HP motor provides consistently smooth performance
  • Quick adjust depth stop for uniform mortise depths
  • Removable On/Off toggle switch prevents accidental or unauthorized use of the tool
  • Three-jaw drill chuck keeps a positive grip on mortising bits with up to 3/8" diameter shanks
  • Two hinged side doors allow easy access to the drill chuck

Description

We see a future built on great brands, products, and people. In every facet of our business, we leverage the strengths of our global infrastructure to maximize the benefits of all three Ideal for professional furniture makers as well as for home woodworkers, Jet's affordable 708580 JBM-5 benchtop mortiser features a 1/2-horsepower induction motor and is designed to take up to 1/2-inch chisel bits. The dependable rack- and-pinion head adjustment gives you accurate drilling control, while its heavy-duty cast iron and steel construction provides durability and stability for years of use. Dependable mortiser for home woodworkers or professional furniture makers (view larger). FeaturesAt only 44 pounds, the Jet 708580 is sturdy but also easily maneuvered, plus it reverses on its base to allow for mortising in long stock. The 4-3/4-inch head stroke is great. Bits are easy to change. Just flip open the steel door on either side (other models on the market often have doors made of flimsy plastic) to gain easy access to the chuck. And, thanks to the 4-inch chuck key, there's little chance of banging or scraping your knuckles while switching bits.The mortiser's feed handle adjusts so you can choose the most comfortable position for each application, and it also offers a quick-setting depth stop and a removable toggle switch that prevents accidental or unauthorized use of the tool. It's set on a heavy- duty cast-iron base with four predrilled mounting holes. Other features include a three-jaw drill chuck that keeps a positive grip on mortising bits for chisels up to 3/4-inch in size, two hinged side doors for easy access to the chuck, and a reversible column for mortising larger stock. It's backed by a 5-year limited warranty.SpecificationsWhat's in the BoxOne Jet 708580 JBM-5 benchtop mortiser, one hydraulic cylinder, one handle, 3/4- and 5/8-inch chisel bushings, one spindle extension, one chuck key, one table, hold down, fence assembly, screws, and owner's manual. Combines 1/2-horsepower motor for solid performance and a heavy-duty cast iron and steel construction. P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); From the Manufacturer For all the projects you do that require mortising, get solid performance and trouble-free operation with this 1/2-horsepower, 115-volt , benchtop mortiser from JET. The rack-and-pinion head raises and lowers for positive drilling control while the long, multiposition splines permit repositioning of the feed handle for perfect handle position. There's a three- jaw drill chuck with an extended chuck key for positive grip on the drill bit. Two hinged side doors allow for complete drill chuck access while the heavy- duty cast-iron and steel construction adds durability and stability to the base. A removable toggle switch prevents accidental turn-on. 1/2-inch chisel capacity and 4-3/4-inch head-stroke. This set comes with three bits: 1/4-inch 708590, 3/8-inch 708592, 1/2-inch 708593. See more

Brand: Jet


Power Source: Corded Electric


Maximum Rotational Speed: 1750 rpm


Voltage: 115 volts


Amperage: 6 A


Power Source: Corded Electric


Maximum Rotational Speed: 1750 rpm


Voltage: 115 volts


Amperage: 6 A


Maximum Chuck Size: 0.38 inches


Additional Features: Portable


Number of Speeds: 1


Speed: 1750 rpm


Maximum Power: 0.5 hp


Drill Type: Drill Press


Drilling Capacity Wood: 0.5 inches


Drilling Capacity Metal: 0.38 inches


Color: White and Black


Material Type: Cast Iron, Steel


Brand Name: Jet


Included Components: Mortising Machine, Hydrualic Cyclinder, Handle, 3/4" and 5/8" Chisel Bushings, Spindle Extension, Chuck Key, Table, Hold Down, Fence Assembly, 3 Chisels


Model Number: JBM-5


UPC: 662755139536


Global Trade Identification Number: 36


Unit Count: 1 Count


Manufacturer: JET


Manufacturer Warranty Description: 5-Year Warranty (if used for commercial or industrial purposes then defaults to a 2-Year Warranty)


Item Type Name: Mortiser


Manufacturer Part Number: 708580


Item Dimensions L x W x H: 14"L x 9.5"W x 30"H


Item Weight: 44 pounds


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Aug 9

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • For the price, perfect!
Style: Benchtop mortiser
Based upon the build quality of my other Jet shop tools and on Amazon reviews, I selected this machine. I needed a mortising machine for a project of building 12 chairs. There are lots of rave reviews already out there, so I won't repeat all the good stuff. Just believe it! What I will do is to defend this little machine's only few weak spots, or at least the criticisms in the reviews. The main one is about the table being too small, and because it is made of MDF, "cheap." Well, the table is actually the cast iron base, and it has a piece of MDF bolted down to it to protect your chisels should you drill clear through a piece of wood. Others complain the table is too small. Not exactly sure why you would need it to be any bigger, but I had no issues with that doing 144 mortises in some pretty strange shapes of wood. The hold-down is, in fact, poorly designed, but it's such and easy fix that it is laughable. I just cut two small wedges of wood and installed them on the bottoms of the two hold-down arms (with a wrap of masking tape) so that now they press down evenly on the workpiece instead of only on the side toward the machine. End of difficulty extracting the chisel from the workpiece. For some of my pieces, to get them placed in the same spot each time, I used a drill-press vise bolted to the cast-iron table. I clamped a stop onto my work table to locate the end of the workpiece and the little vise did the rest. The three chisels that ship with this machine are incredibly sharp and worked perfectly. (I only used two of them.) The motor's power is more than ample, the machine is designed so that the pull-handle can be locked into whatever position that is the most advantageous for the situation. It does take a hefty pull, so that's important. For its low price, this is a terrific machine. I highly recommend it. BTW, it arrived from Amazon well-packaged and in perfect condition. And no, I didn't get paid to write this review; I just like to give praise when it's due! I'm giving 5 stars in spite of my only criticism, the hold-down, because it was such an easy fix, and also because had I wanted a more "perfect" mortiser, I could have paid $1000 for a professional machine. This is a tool I will not use every day, and for the price, it is perfect. I thought it was actually fun to use! Imagine drilling square holes! ... show more
Reviewed in the United States on April 17, 2014 by riverguy

  • Easy to set up and use
Style: Benchtop mortiser
The Jet JBM-5 Mortising machine is easy to assemble and set up. Its easy to use and pretty darn accurate once its set up. Initially there was some movement as I lowered the chisel. There's a small track that the upper assembly sides up and down on, and once I tightened the allen screws it helped. You need to mount the base onto a larger piece of MDF or plywood for stability. I do wish there was a bracket attached to the machine that could hold the chisels in place while not in use. Other than that, Its a good mortising machine ... show more
Reviewed in the United States on July 28, 2023 by Mr JImbo

  • For a bench top machine it's top of the line. More pros than cons
Style: Benchtop mortiser
This is a great bench top machine and that's something to consider and remember when buying this. Don't expect To be plunging down any more than 3- 3- 1/2 " max. And don't try and rush it or it will get stuck mid way the bits that came with mine were really sharp and on point I had no issues with the bits being dull like some habe said. However the fence moves/pivots a little if u over tighten the knobs so keep that in mind and the table needs to be re tightened every now and then I think becuz it's mdf and don't over tighten it or you'll strip the threads. Don't get me wrong this is a very good machine and well worth the money if you're looking to do small mortises are and if you have a bit of patience and don't mind read tightening parts every once in a while Another downside is there's no clamp to hold it in place so you need to use your other hand to hold your work peace in place but other than those 2 minor pet peeve I think this is a great little machine the plunge is smooth and would definitely recommend it if you're looking to do the usual 2 to 3" deep mortises but once again if you're looking to do anything larger for like timber framing type stuff I would definitely get a stationary machine. in comparison to the riken machine the only thing different in my opinion is the riken has that hold down clamp but also costs 50-60$ more.this is my 1st time using a mortise machine but for a bench top machine id say this is top of the line ... show more
Reviewed in the United States on February 8, 2018 by joe w.

  • Best value for the money
Style: Benchtop mortiser
Being new to woodworking, I've had to trust the reviews of others in trying to sort out which brand of tools to buy so I hope this helps other newbes. Having been in the construction industry for over 35 years, I had pretty much done it all with the exception of cabinet/furniture making. With that in mind, I decided to take on an ambitious remodel for home including building the cabinetry/vanities for the bathroom and a new bedroom set. After reading more reviews than I can count and taking a trip out to the local HF to look at the Central Machinery Mortiser, I decided to spend the extra money on this one. Within a half hour of receiving it, I had it set up and was drilling my first mortis joint. Assembly literally took minutes to complete since the instructions are clear, concise and easy to understand. The lightweight oil they shipped everything in was easy to wipe off with some mineral spirits and part seemed well fit and finished. The exception to this is the hold down clamp. As others have said, this is pretty much useless. I don't know what modifications the others have made but I pretty much set the clamp aside and used the quick-grip squeeze clamps on each end of the fence to hold the wood in place. These allowed me quick and easy adjustments to the wood as well as being an inexpensive, less time consuming alternative to modifying a piece of metal. The fence itself seemed fine although I can see myself extending it at sometime in the future and the chisel bits that came with the unit were extremely sharp and worked well. ... show more
Reviewed in the United States on March 25, 2015 by Shawn H

  • This is a basic mortiser
Style: Benchtop mortiser
As received, the compressed gas cylinder kept popping off its connection at the top. The manufacturer replaced both the cylinder and the connection. This resolved the problem. One of the reasons I picked this unit was the promised ability to rotate the unit to handle long boards needing a mortise on the end of the board. The unit design actually makes this difficult because the rotation has to be 180 degrees. The impact is that either the unit has to be installed on a pedestal or skidded on a board that can also be rotated 180 degrees. With creation of a home made jig I have made this work but not without a lot of effort. The adjustment provided for positioning the board is coarse and tightening the lock screw actually moves the board so you have to keep adjusting to get it to be aligned where you want it. Bottom line, the unit works and gives clean square holes. It also weighs less than some competitive units. The price is reasonable for an entry device. I have successfully used it to build a table. But...it might be better to spend a little more to get better functionality. ... show more
Reviewed in the United States on August 26, 2020 by Steve harper

  • Must Have Mortise Machine
Style: Benchtop mortiser
Exceptional Machine - Just what I expected from Jet. Well built and worth every cent.
Reviewed in the United States on September 13, 2025 by Ron Beck

  • Very impressed
Style: Benchtop mortiser
I typically don’t write a review on the first day but…. From the first sight of the arriving package to the results of the first test, I have been extremely impressed. The instructions were easy to follow and in American English. All parts were heavily oiled and well packaged. Once assembled I admired the features; the doubled clamps on the main tub and double alignment screws both of which could have been accomplished with one clamp and screw each. The first test was inspiring. I’ll be looking to JET for future equipment acquisitions. ... show more
Reviewed in the United States on March 18, 2026 by Chuck Clovis

  • This is a really fun tool to use
Style: Benchtop mortiser
Morty and I are getting along fine. Right off the rip I used a Fisch Hollow 5/8" bit instead of the three gimme-bits cause you tend to get better results when you use better steel. I read all the people complaining about the hold down, and I kind of get it, but not really. It was a simple thing to add extensions by drilling/tapping some feet on the hold downs and putting some rubber bicycle handlebar end stops on them, so if that is the worst problem this machine has, it is gonna be fun living with Morty. My thought is to not use this for building furniture, but do some puzzle boxes and make a nice gun rack using square ebony pegs on a semi-rough tulip poplar board, things like that. This machine makes my ham fists into virtuosos when making a square hole as I am not gifted with a chisel in making it do what I want it to do. The bit makes noise when not cutting since the chisel and the bit are not really aligned in a super precision manner, and even if they were it would still make noise. I spray on some dry lube like moly-mist and it is good for a while. Once the bit breaks in a little, it will probably be fine. The machine is quiet-ish and the MDF base is awesome for those of us who like to make through-mortises. Yeah, this is a major splurge, but the ability to cut square holes is awesome. It was either this or a small lathe, and this doesn't take much space. I am really pumped on this tool. ... show more
Reviewed in the United States on June 8, 2018 by Douglas Taylor

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