Kerf Making Jig

  • Advertise with us
Project by GarageWoodworks posted 05-20-2015 05:39 AM 3274 views 18 times favorited 7 comments Add to Favorites Watch

I made this kerf making jig a few years ago but I don’t think I ever shared it here. It helps you to create tight fitting half lap joints very easily.

The screw can be tightened or loosened to create tighter or looser fitting dadoes. The width of the wood and screw minus the width of the wood equals the width of your saw blade.

How it’s used:
1. Cut one is made with the work against the end w/o the screw w/ the piece to be inserted between your miter gauge stop block (see picture 3).
2. Second cut is made by flipping the jig over and removing the inserted piece and referencing the work off of the screw end.
3. Clean out the material in between the two cuts.


(width of wood and screw – width of wood) = width of blade kerf

Watch a video demo

Watch a project build using the jig

-- Subscribe on YouTube:

7 comments so far

View bbasiaga's profile


731 posts in 1416 days

#1 posted 05-20-2015 10:52 AM

Simple and effective. Nice.

The second link doesn’t work.


-- Part of engineering is to know when to put your calculator down and pick up your tools.

View GarageWoodworks's profile


515 posts in 1578 days

#2 posted 05-20-2015 11:14 AM

Thank you. The second link should work now.

-- Subscribe on YouTube:

View CharlieK's profile


463 posts in 3214 days

#3 posted 05-21-2015 01:42 AM

Very clever and super simple, too. I love it!


-- Adjustable Height Workbench Plans

View GarageWoodworks's profile


515 posts in 1578 days

#4 posted 05-21-2015 01:58 AM

Thank you. Considerably easier to make than the more popular alternative ;)

-- Subscribe on YouTube:

View TopamaxSurvivor's profile


17577 posts in 3097 days

#5 posted 05-21-2015 06:07 AM

Another awesome post! Thanks,

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View NormG's profile


5424 posts in 2425 days

#6 posted 05-22-2015 01:44 AM

Great solution

-- Norman

View tdv's profile


1139 posts in 2491 days

#7 posted 05-22-2015 07:49 AM

Brilliantly simple Brian I made one of the complicated kerf masters I prefer this one Thanks

-- God created wood that we may create. Trevor East Yorkshire UK

Have your say...

You must be signed in to post the comments.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics