1.5" Thick Box Joints w/ Incra LS Table, How? - Router Forums
  • 1 Post By bcfunburst
  • 1 Post By PhilBa
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 01-03-2016, 11:41 AM Thread Starter
Registered User
Join Date: Jan 2013
Country: United States
First Name: Irish
Posts: 31
Default 1.5" Thick Box Joints w/ Incra LS Table, How?

I "want" to make legs out of glued 3/4"x3" hardwood, making the legs 1.5"x3". They will be 18" tall and 16" wide like the pic below.

My question is the joining aspect. How can I make a 1.5" deep box joint? Is that even necessary? Will be supporting a 50"x20"x2" slab of black walnut. Making a coffee table. Other leg will be a recessed 3"x12" piece of oak.

For the boxjoint, Can I just keep raising the bit and make passes? What bit?

I dont have a band saw or a table saw jig.

Pic of legs I want to make out of wood.

Psychbiker is offline  
Sponsored Links
post #2 of 4 (permalink) Old 01-03-2016, 01:00 PM
Registered User
bcfunburst's Avatar
Join Date: Jan 2012
Country: Canada
First Name: Reg
Posts: 437
Default Box Joint

Welcome to The Forum . Hard to answer without knowing your experience level. I am looking at the photos you posted. Box joints are OK for making the leg assemblies and I would use a 1/2" straight bit w 1/2" shank, on a Router Table using a jig. You may want to consider some sort of reinforcement under the table to help stop that pesky Wracking hazard. I think even 3" wide hardwood isn't as strong as 3" wide steel leg assemblies. You will also find a lot of helpful ideas and instructions if you search out your questions on YouTube! Hope this helps you to have more fun with woodworking.
Murtu01 likes this.

"Even bad decisions make good stories"

bcfunburst is offline  
post #3 of 4 (permalink) Old 01-03-2016, 01:44 PM
Registered User
PhilBa's Avatar
Join Date: Sep 2014
Country: United States
First Name: phil
Posts: 1,533

How big are your box joint fingers (er, hope that term doesn't spark another argument)? Given that the LS allows repeatable positioning, multiple passes at increasing depths will probably be ok though you might not wind up with super tight fingers. Since the board isn't that wide, you can probably get excellent contact just by clamping across the fingers.

By the way, you aren't limited to your router bit width as the finger size. Here's an example template that uses a 1/2" bit to make 5/8" fingers. Note that it shows where you make multiple passes to get the right width finger/slot. If you have an accurate printer, you can cut that strip out, reinforce it with clear tape and slide it into your LS.
Attached Thumbnails
Click image for larger version

Name:	pyrouterjig_1.jpg
Views:	94
Size:	1.17 MB
ID:	177074  

Murtu01 likes this.

Measure twice, cut once and CROSS OUT THE WRONG MARKS.

Visit my shop website.
PhilBa is offline  
Sponsored Links
post #4 of 4 (permalink) Old 01-03-2016, 02:43 PM
Moderation Team
Cherryville Chuck's Avatar
Join Date: Sep 2010
Country: Canada
First Name: Charles
Posts: 16,411

I'm with Reg on the racking issue. A square or rectangle easily become a parallelogram with racking force applied. A trapezoid is much stronger but you would probably be wanting to use a table saw to make that joint.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
Cherryville Chuck is online now  

Quick Reply

Register Now

In order to be able to post messages on the Router Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
More fun with box joints Gaffboat Show N' Tell 17 04-07-2015 09:27 PM
Incra Table and Positioner Buckyoneshot Table-mounted Routing 22 12-29-2014 07:32 PM
Yet another router table build ... JohnBFisher Table-mounted Routing 23 11-13-2014 11:33 AM
Table saw or router table for best box joint ? RainMan 2.0 Jigs and Fixtures 18 09-15-2014 12:16 AM
Incra Ultra How-To (Box Joints + Other Stuff) Nickbee Show N' Tell 17 06-22-2009 12:42 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome