DIY Loose Tenon Jig – Easy Build & Super Accurate Mortises!

I’ve been wanting to make a loose tenon jig for a while, and I finally got around to building one! After searching for an easy-to-build and easy-to-use solution for cutting mortises, I found an inspiring design on YouTube and decided to create my own version—with a few upgrades.

For the cutting, I’m using my Makita trim router fitted with a 6mm upcut bit. The handheld setup is simple, accurate, and perfect for producing consistent mortises. I also took the opportunity to make my own tenons (or “dominos”) from shop scrap, giving them a second life in upcoming woodworking projects.

This jig is now one of my favorite shop-made tools—fast, accurate, and versatile for joinery work. If you’ve been thinking about building your own loose tenon jig, this project might give you some ideas!
Tools & Materials Used:

Makita Trim Router

6mm Upcut Router Bit

Scrap hardwood for tenons

Shop-made loose tenon jig

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#tenonjoints #dominojoints #mortiser #diy #woodworking #router
#handheld mortiser

Thanks for watching!
00:00:00 Intro
00:00:18 Parts for Assembly
00:03:58 Motion assembly
00:06:26 Base assembly
00:07:41 Router Mount
00:10:14 Face plate
00:11:13 Motrtise sizing bolts
00:12:41 Fence assembly
00:14:50 Mortice marking gauge
00:15:25 Dust and safetly shield
00:17:04 Making tenons/dominos
00:18:09 Test custs
00:19:35 Outro