Box Joint cutting jig on the RT

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Project by woodworm posted 11-12-2008 11:00 AM 5168 views 1 time favorited 11 comments Add to Favorites Watch

Hi all,

Today I built Box Joint cutting jig on the Router Table and have tested it’s accuracy. It is ok.
I bought the bit at MLCS Woodworking and built the jig as suggested (shown in How to video) on their website. I also consulted their technical person on some issues like how to cut workpiece wider than the bit’s cutting height. I suggested to using the collet extension, and it works pretty good.

Overall, I’m happy with the purchase and the jig I built.

Thanks for viewing

-- masrol, kuala lumpur, MY.

11 comments so far

View Kerux's profile


812 posts in 5383 days

#1 posted 11-12-2008 11:13 AM

What is the height you can go before having to re figure the jig height?


View jcame's profile


72 posts in 5076 days

#2 posted 11-12-2008 11:40 AM

I have been wondering about these bits since they came out , thanks for posting.

-- Jed,Ala,

View woodworm's profile


14477 posts in 5090 days

#3 posted 11-12-2008 12:41 PM

The maximum bit cutting height is 1-7/16” and the maximum cutting depth of 1/2” (max. workpiece thickness). My router’s maximum plunge capacity is around 2-1/2”. The jig base is 1/4” thick and the router table insert is 1/4” thick, leaving a span of 2” height. Meaning, my maximum width of the workpiece that can be cut using this bit and the jig is roughly 2”.

Considering the size of the router bit (1-7/8”D x 1-7/16”CH), it is safer to insert the maximum full length of bit shank, ie 1” iinside the router collet. And if I need to cut workpiece wider than 2” I can use the collet extension. But its a bit scary watching the bit protrudes 3” above the table.

-- masrol, kuala lumpur, MY.

View woodworm's profile


14477 posts in 5090 days

#4 posted 11-12-2008 02:24 PM

Yes Barry, that is a better alternative if we are malking a lot of repetitive cutting as you said.
Thanks for a good suggestion.

-- masrol, kuala lumpur, MY.

View Dick, & Barb Cain's profile

Dick, & Barb Cain

8693 posts in 5799 days

#5 posted 11-12-2008 02:45 PM

The MLCS Video shows how to set up for the second cut on wider boards.

-- -** You are never to old to set another goal or to dream a new dream ****************** Dick, & Barb Cain, Hibbing, MN.

View woodworm's profile


14477 posts in 5090 days

#6 posted 11-12-2008 03:07 PM

Thanks Dick & Barb Cain for the link to video. Actually I did try to paste a link to that video, but it did not through. You save me for d-day!


-- masrol, kuala lumpur, MY.

View Lenny's profile


1752 posts in 5026 days

#7 posted 11-15-2008 03:43 AM

Hi Woodworm,

I notice that you view and offer kind comments on many projects posted here. I couldn’t pass up the opportunity to say hello and say that you did a fine job on the jig. I think I can safely say that I have never communicated with anyone in Malaysia before! Thank you for posting the information about the bit.

-- On the eighth day God was back in His woodworking shop! Lenny, East Providence, RI

View Skylark53's profile


2868 posts in 4560 days

#8 posted 01-20-2010 12:56 AM

You do nice work. I love the woods. Using this bit and jig is still a bit intimidating for me. I hope to give it a try someday. Thank you for all your warm, encouraging words.

-- Rick, Tennessee, John 3:16

View olddutchman's profile


187 posts in 5435 days

#9 posted 05-12-2010 12:33 AM

Glad that it works. That is all You said about the bit. Does that mean that you would recommend it to us. Any drawbacks? Thanks for the post

-- Saved, and so grateful, consider who Created it ALL!!!

View woodworm's profile


14477 posts in 5090 days

#10 posted 05-12-2010 09:46 AM

Thanks Olddutchman,
I think this bit works well for thin and narrow workpiece. So apparently the drawbacks of this ”type” of bit is the stock’s width & thickness limitation (again I emphasized the word ”type” so as not to associate it with the ”brand name”).

-- masrol, kuala lumpur, MY.

View Dautterguy's profile


51 posts in 5261 days

#11 posted 05-04-2017 01:48 PM

Made 8,Christmas gifts, using 1/4 inch “box dado blades” VERY TIME CONSUMING . This looks like a better way all around.

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