What kind of saw/tool do they use to make these joints?

Just saw something on this the other day. What I saw was an overgrown shaper that had a toothed cutter. Machined the profile on the ends. Applied glue and pressure to finish.

 

http://www.puspamandiri.com/2014/11/timber-finger-joint-laminating.html

Edited March 31, 20224 yr by lew

Grizzly Tools offers a router bit version HERE

 

Or one for a spindle shaper HERE

 

They offer other variations as well.

I'm almost positive someone makes a router bit that'll cut that comb joint.

https://www.toolstoday.com/v-6159-55392.html?glCountry=US&glCurrency=USD&ne_ppc_id=1701009076&gclid=EAIaIQobChMIlLiss87y9gIVh21vBB2Nzwz0EAQYAyABEgLF1PD_BwE

Not quite the same.  But should work as well. 

Edited April 1, 20224 yr by 4DThinker

 Thanks for the info. I am not interested in buying this tool, I thought it may involve a cutter like that. My interest was to see how they do it. It is used so often in furniture and other mass produced wood items. I guess it is a great way to use the best part of the wood and eliminate knots and bad places. Cost reduction and more use out of the wood.

 It sure would make a strong joint.

I see it used quite often in "contractor grade" prefinished or paint grade baseboard, molding, trim etc. material. Sometimes in solid wood door stile, rails and jambs too.

Yes I was tempted to buy that bit but talked myself out of it. However it may be the answer to the proverbial "board Stretcher".

see those joints in door frames a lot.  a way to make long boards out of shorter pieces (cut offs).

The desk I'm sitting at, the top made from a butcherblock 2'x4' slab from Menards is made of short boards joined by that comb joint then all glued together.  I'm sure the factory where it was made came up with a good way to use up short cutoffs.

 

For visual effect here it is written up in my blog:  https://4dfurniture.blogspot.com/2016/05/simple-desk-design-tenon-array-joint.html

In use it suffers from clutter that tends to cover any horizontal surface in my house. Just enough clear space for my PC/Keyboard/Mouse to work effectively.   

4D   

Edited April 2, 20224 yr by 4DThinker
Added detail