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The G0645 1/2 HP Benchtop Mortising Machine was awarded as Top Value by Wood Magazine for its combination of features including the rack-and-pinion fence, six-position handle and riser block that added 1-1/4" stroke to the column.

Rigid cast-iron construction and rack-and-pinion head control on a dovetail column help ensure this Benchtop Mortising Machine will produce precision mortises every time.

A pneumatic return strut eases the step-and-repeat cycle when making multiple mortises. A riser block is also included to increase the maximum stock thickness to 6".

The 1/2 HP motor powers through any type of wood and the easy-access drill chuck makes it simple to change chisels. Includes 4 mortising chisels!

Like all of the Grizzly mortising machines, the G0645 comes with a 1-year warranty covering parts and assuring the unit is free from factory defects. (Consumables are not covered by the warranty.)

The G0645 manual was written by our U.S. based Documentation Department is packed with useful information.

The Grizzly Technical Support team is U.S. based. Parts and accessories for the mortising machine are available on-line and shipped from the Grizzly parts warehouse in Springfield, MO.


  • Motor: 1/2 HP, 110V, single-phase, 6A
  • Spindle speed: 1725 RPM
  • Spindle taper: JT #2
  • Spindle travel: 3-1/4"
  • Chuck size: 3/8"
  • Collar size: 5/8"
  • Maximum stock width: 8-1/2"
  • Maximum stock thickness without extension block: 4-1/4"
  • Maximum stock thickness with extension block: 6"
  • Maximum mortising depth: 3"
  • Maximum chisel travel: 4-5/8"
  • Maximum distance column to chisel: 5"
  • Chisel size range: 1/4"-1/2"
  • Table size: 10-1/2" x 12-1/4"
  • Overall dimensions: 13-3/4" W x 29" D x 32" H
  • Approximate shipping weight: 76 lbs


  • Tool storage rack on back of column
  • Dovetailed column and head
  • Includes 1-3/4" riser block for increased capacity
  • Rack and pinion fence movement (without riser block installed)
  • Dovetailed column with adjustable ways
  • Adjustable depth stop
  • Large table surface
  • Multi-positional handle
  • Cast iron construction throughout
  • Includes four chisels: 1/4", 5/16", 3/8", 1/2"

16 Customer Reviews (4.7 out of 5 stars) : Sign in to write a review

Anonymous Reviewer
07/09/2020 11:07:39 AM

I had not built anything up with mortise and tenon joinery before using this Grizzly mortiser. After a little practice on scrap pieces, I was able to make good mortises. It is not the the most finely tuned tool in my shop, but it performs well and is reasonably priced. It also comes with four chisels in various sizes and that is also a big plus.

Anonymous Reviewer
Quality machine. Performing as it should. 05/10/2020 3:44:23 PM

No feedback given

Anonymous Reviewer
02/02/2020 10:34:11 PM

I've just finished my first project with it and loved it. The machine is great. Had a little trouble with the chisels and had to have them replaced, but haven't had a chance to use the new chisels yet. ( I completed the project using an old chisel from a jig for my drill press.)

Machine - great, chisels - ?, service - great.

Mark T
Great quality 01/04/2020 1:02:01 PM

Great product. Does what I need but I should have bought the next size up for the extra power.

09/05/2019 10:24:52 AM

No feedback given

Harold D
08/15/2019 1:46:19 PM

I have had this for a month. Setup was easy. I have done about 200 mortises, mostly with the 1/2" chisel. It has been a fantastic tool. I did do a minor tune up on the chisel before using it. The only machine adjustment I made was to tighten the gib on the vertical ways. Being a benchtop machine has made it ideal for what I have been doing, allowing me to set it up to do mortises along a 16 foot length of wood.

Gary V
03/27/2019 1:59:09 PM

The product arrived in good shape. I haven't had a need to use it yet.

Kenneth H
03/22/2019 8:58:35 PM

No feedback given

Anonymous Reviewer
This is an excelent product. Stronge construction. accurate, easy aliangement. 06/07/2018 9:12:25 PM

Any idea when the sander I ordered on 9258366 will be available?

Anonymous Reviewer
04/06/2018 9:05:00 PM

No feedback given

William W
Great value 12/20/2017 1:18:31 PM

I own a small woodworking business and have bought several machines from Grizzly. This bench top mortising machine is like all the rest. Excellent quality, craftsmanship and value. I would highly recommend this machine.

robert S
top notch 11/03/2017 8:19:17 PM

I received it last month and is a great addition to my shop

Anonymous Reviewer
08/11/2017 2:10:48 AM

No feedback given

Anonymous Reviewer
Good product, but the shipped assembly could be better 07/05/2017 2:18:51 PM

Product works well, but it shipped with the chuck unattached to the shaft. Also, cannot move the rail when extension block is installed. As moving the rail is something that us done frequently, I wouldn't expect the extension block to be mounted by default.

Anonymous Reviewer
06/05/2017 12:21:50 PM

No feedback given

john M
Great product at a great price 01/29/2017 9:29:55 PM

No feedback given