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#5: Jet 708580 JBM-5 1/2 Horsepower Bench Mortiser
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Jet 708580 JBM-5 1/2 Horsepower Bench Mortiser


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  • 1/2-horsepower bench mortiser; 115 volts; 1,752-rpm motor

  • 1/2-inch chisel capacity; 4-3/4-inch head stroke; rack and pinion head

  • Constructed from rugged cast-iron and steel

  • Includes mortiser, three bits, chuck key

  • 44 pounds; Backed by 5-year limited warranty

Product description

Mortising has never been easier or more accurate. Model JBM-5 JET Benchtop Mortiser features include: powerful 1/2 HP TEFC 1725 RPM motor for solid performance and trouble free operation, heavy-duty cast iron and steel construction for durability and stability, three jaw drill chuck with extended chuck key for ease of positive grip on mortise drill bit. Rack and pinion head raising and lowering allows for positive drilling control. Two hinged side doors to allow for complete drill chuck access. Removable safety toggle switch for prevention of accidental turn on 1/2″ max. mortise chisel capacity. 4-3/4″ head stroke. Includes free 1/4″, 3/8″ and 1/2″ chisel and bit sets.


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.

Jet 708580

Dependable mortiser for home woodworkers or professional furniture makers (view larger).

At a Glance

708580 JBM-5
Bench Mortiser
At a Glance:

  • Powerful 1/2-horsepower motor for consistently smooth performance
  • Heavy-duty cast iron and steel construction
  • Long, multiposition mortising handle
  • Dependable rack-and-pinion head adjustment
  • Quick-adjust depth stop for uniform mortise depths
At a Glance


At 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.

5-year warranty


  • Motor: 1/2 horsepower
  • Spindle speed: 1725 rpm
  • Chuck size: 3/8-inch
  • Chisel shank capacity: 5/8- and 3/4-inch
  • Head stroke: 4-3/4 inches
  • Chisel center to fence: 3-1/2 inches
  • Fence size: 1-9/16 x 13-3/4 inches
  • Base size: 7-5/8 x 12-3/16 inches
  • Dimensions: 14.4 inches by 22.8 inches by 11 inches

What’s in the Box

One 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.

Jet 708580

Combines 1/2-horsepower motor for solid performance and a heavy-duty cast iron and steel construction.

See all Product description

Product information

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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