35. Mortising for a Blind Tenon

  Рет қаралды 12,966

Graham Blackburn Woodworking

Graham Blackburn Woodworking

Жыл бұрын

How to excavate a mortise for a blind mortise-and-tenon joint.
Visit www.blackburnbooks.com for books and to sign up for lessons in Woodstock NY.

Пікірлер: 84
@ikust007
@ikust007 Жыл бұрын
We are extremely lucky to have you sharing your knowledge.
@gjbmunc
@gjbmunc Жыл бұрын
It's my pleasure
@roberthahn8555
@roberthahn8555 Жыл бұрын
Hey the sound was much better in this video! Thank you for investing time into improving it! Great video, I learned lots about mortising technique!
@gjbmunc
@gjbmunc Жыл бұрын
Glad to hear it!
@jimhyslop
@jimhyslop Жыл бұрын
@@gjbmunc oh, if we're discussing ways to improve sound - I have noticed that you sometimes accidentally tap your mic with whatever you're holding. You might want to consider getting a foam cover for it, or moving it a few inches up or to the side.
@davidcampbell2845
@davidcampbell2845 Жыл бұрын
Every episode has a unique and historical gem in addition to the demonstration. Good stuff.
@gjbmunc
@gjbmunc Жыл бұрын
Thanks!
@riksheline5961
@riksheline5961 10 ай бұрын
Thanks for you teaching
@gjbmunc
@gjbmunc 10 ай бұрын
It's my pleasure
@georgegeyer3431
@georgegeyer3431 4 ай бұрын
You learn something new every day. I have both and just thought they were the same.😊
@gjbmunc
@gjbmunc 4 ай бұрын
Me too!
@maulstar1
@maulstar1 8 ай бұрын
These videos are phenomenal! Thank you, sir!
@gjbmunc
@gjbmunc 8 ай бұрын
Glad you like them!
@tuffymartinez
@tuffymartinez Жыл бұрын
Thank You Graham .... Always enjoyable, informative & I look forward to your next show... TM
@gjbmunc
@gjbmunc Жыл бұрын
Glad you enjoyed it
@kentonward97
@kentonward97 Жыл бұрын
I made the mistake of using regular bench chisels to make mortises, although it can be done you really have to watch what your doing so the chisel doesn’t twist on you !! Glad that now I have mortise chisels. Life is easier with the right tool for the job!
@ikust007
@ikust007 Жыл бұрын
Same here . Since I switch to Ashley Iles, I love it now.
@gjbmunc
@gjbmunc Жыл бұрын
Great point!
@ArchEdge
@ArchEdge Жыл бұрын
Thank you Graham - Looks like i've got to add Mortise Chisels to my Wish List.
@gjbmunc
@gjbmunc Жыл бұрын
Good luck!
@adriangilbert-rh7nq
@adriangilbert-rh7nq Жыл бұрын
Mr Blackburn would have made an excellent teacher.
@gjbmunc
@gjbmunc Жыл бұрын
Thank you. I teach regularly at my own shop (see my website) and big schools around the country.
@richardcolling8088
@richardcolling8088 Жыл бұрын
@@gjbmunc please visit the UK :)
@MCsCreations
@MCsCreations Жыл бұрын
Thanks a bunch, Graham! 😃 I still need to buy a chisel like that! Stay safe there with your family! 🖖😊
@SLU94
@SLU94 Жыл бұрын
Good stuff. Thanks.
@gjbmunc
@gjbmunc Жыл бұрын
Glad you enjoyed it
@davida369
@davida369 Жыл бұрын
Been waiting for this, thx.
@gjbmunc
@gjbmunc Жыл бұрын
Thanks!
@johnjackson9601
@johnjackson9601 Жыл бұрын
Thank you for the expert information.
@gjbmunc
@gjbmunc Жыл бұрын
You're very welcome!
@HWCism
@HWCism Жыл бұрын
Thanks
@gjbmunc
@gjbmunc Жыл бұрын
You're very welcome
@jesusefrenlopezgarcia8596
@jesusefrenlopezgarcia8596 Жыл бұрын
Todo lo que buscaba lo encontre en este canal gracias buen hombre
@gjbmunc
@gjbmunc Жыл бұрын
Muchas gracias.
@ikust007
@ikust007 Жыл бұрын
Thank you !!
@gjbmunc
@gjbmunc Жыл бұрын
You're welcome!
@dpmeyer4867
@dpmeyer4867 Жыл бұрын
thanks
@gjbmunc
@gjbmunc Жыл бұрын
You're welcome!
@robbenton5211
@robbenton5211 7 ай бұрын
Just found this video and it's almost exactly the technique I use when I chop mortise by hand. I use a homemade guide to keep myself straight. I'm curious how to fix any issues you may have if your mortise winds up crooked.
@gjbmunc
@gjbmunc 7 ай бұрын
Trim the proud side/end and fill the gap.
@raynierllewis2827
@raynierllewis2827 Жыл бұрын
Oh my word this is just what I was looking for.Now where on earth am I going to find a sash plane😢
@gjbmunc
@gjbmunc Жыл бұрын
Try eBay and do a Google search. There are also quite a few old tool dealers on line.
@athmostafa2462
@athmostafa2462 Жыл бұрын
Thanks 👍.
@gjbmunc
@gjbmunc Жыл бұрын
Welcome 👍
@etymon
@etymon Жыл бұрын
Fantastic video, thank you. I was wondering if there is any value in using a brace to drill out the bulk of the waste before truing the sides and ends with the chisel?
@gjbmunc
@gjbmunc Жыл бұрын
Absolutely, especially if you use a mortising boring jig with a sleeve matching the size mortise chisel and matching tenon.
@DennisLampret
@DennisLampret Жыл бұрын
thank you, wonderful timing! i'm working on an old house which is just getting some new traditional windows next month. the previous owner happened to have all the tools that were used to make the existing ones stored in the attic :) i am wondering how to sharpen the profile shaped irons.
@gjbmunc
@gjbmunc Жыл бұрын
A simple trick that often works is - providing the profile of the iron still matches the profile of the sole of the plane - simply to sharpen the BACK of the iron. The cutting edge after all is simply where the two sides of the iron intersect. (This is partly why a,s I mentioned in the episode, why the back of the mortise chisel I used was no longer completely vertical!)
@1deerndingo
@1deerndingo Жыл бұрын
Thank you. I like to watch different people do different ways so as to pick up tricks that suite the individual. I had'nt seen anyone start from the centre before. I makes sense though to protect the ends and may be quicker than starting at one end, gaining depth and then having to work all the way back.. Also, last week you were making a window using the sash plane. How do you remove the sash form in the area where the motise and tenon joint sits? That's what I thought you were going on to this week.
@gjbmunc
@gjbmunc Жыл бұрын
It turned out the mortising section was too long so I interposed it between Part One and Part Two of the window-making episode. Next week you'll see the simple jig that is used after mortising to remove the moulded section.
@rollingstone3017
@rollingstone3017 Жыл бұрын
I really appreciate the no-fuss, non-anal approach here. Makes hand work much more fun really.
@gjbmunc
@gjbmunc Жыл бұрын
Thanks!
@thomashverring9484
@thomashverring9484 Жыл бұрын
Thank you! Very interesting. A mortise chisel is called a "lokbejtel" in Danish. The word means something like a "hole biter/cleaver". I know there are different types, although I'm not entirely sure about the differences.
@gjbmunc
@gjbmunc Жыл бұрын
Thanks again!
@timothymallon
@timothymallon Жыл бұрын
We also call it a "pig sticker" here in the US.
@thomashverring9484
@thomashverring9484 Жыл бұрын
@@timothymallon Yes, I wonder if we also have a more "colorful" name for it 😅
@jimhyslop
@jimhyslop Жыл бұрын
I'm not typically one to give my tools names, but I really like "hole biter" so I might just use that!😃
@thomashverring9484
@thomashverring9484 Жыл бұрын
@@jimhyslop Yes, it sounds like something out of Lord of the Rings 😄
@jimrichards7014
@jimrichards7014 Жыл бұрын
I think I got the mortising technique down, I just don’t quite get how to use the gauge correctly so the mortise is exactly in the centre.
@gabrielmaynard
@gabrielmaynard Жыл бұрын
if the board is 6 squared by a machine check from one face, then reference the other, the nails on the gauge will fall in the same hole. If you're doing a fully traditional style where you only have one reference face and one reference edge you need to measure the edge and find center, measure your chisel and find center on it also, then place the center of the chisel on the center of the edge of the piece and lightly tap it to establish a mortise width, then set the guage to the width of the line you made into the wood. You can also measure the width of the edge of the wood and divide that number by 3 to give you the ideal width of the mortise then set your mortise gauge by placing a ruler to the mortise gauge reference face and measuring to the first nail. You set the width of the mortise gauge first in most cases and then set the length of the gauge. To give a simple example I measure a board edge that is 6" wide. I divide that number by 3 which is 2. 2,4,6.- I place a line on the 2" spot and the 4" spot, this places the ideal mortise width on the piece, I match a mortise chisel close to this width then set my gauge accordingly. If my chisel is smaller than the width of the ideal mortise I simply try to find center by eye or if you are really particular you can measure the distance to find center. Once a gauge is set all references must be made by your established edge and face, If you're machining your wood then there's a lot more wiggle room but hand tools require the same reference face and reference edge to ensure accuracy. Also if you are slightly off one side or the other with the mortise hole the piece will be slightly off center when assembled- most cases the now assembled piece can be planed to a new thickness to accommodate both pieces. Hand tool work is a lot of correcting what's there, a machinist woodworker can't make many mistakes with his accuracy but a hand-tool woodworker has a lot more freedom to correct their errors and finish the piece. Remember the best furniture was made in a time people used wooden reference squares and sighted "flat" by eye. There was none of these machinist straight edges and fancy tools for your average carpenter 400 years ago and they still created brilliant pieces. Hope this helped, I do this stuff for a living so I like to share when I can.
@gjbmunc
@gjbmunc Жыл бұрын
Gabriel, thank you for your explanation, and of course your system works in many cases, but apart from the fact that the mortise (and tenon) are not always required exactly in the center of the workpiece, I find it generally easier to cut the tenon first and then use it to lay out and position the mortise by laying one on top of the other laterally and transversely. That way I don't have to actually bother with measurements.
@ianbye4411
@ianbye4411 Жыл бұрын
Hi Graham,I wondered how tall your workbench is as it looks just perfect for your work stance.I am currently building a Roubo bench and would love to know, thanks,lovely video and beautiful workshop.
@gjbmunc
@gjbmunc Жыл бұрын
Stand straight , let your arm hang down and your palm held horizontally should rest on the bench top. This is generally considerd ther best height for planing.
@mikejustice1196
@mikejustice1196 Ай бұрын
At :46 in the beginning of this video… what kind of folding ruler is that on your work bench? Name of it please. I’ve seen boatwrites use them too. Thanks
@gjbmunc
@gjbmunc Ай бұрын
It's a four-fold, two foot rule by Stanley (from a long time ago)
@pettere8429
@pettere8429 Жыл бұрын
Would it not be easier to get the piece with the tenon in the right place if you start by cutting the tenon?
@gjbmunc
@gjbmunc Жыл бұрын
Most of the time I do indeed start by cutting the tenon in order to use the tenone to mark out where the mortise will go.
@darrenwheatley4677
@darrenwheatley4677 2 ай бұрын
I’ve always been told the big chisels are “pig stickers”? Is that a local UK name?
@gjbmunc
@gjbmunc Ай бұрын
Never heard it myself.
@ikust007
@ikust007 Жыл бұрын
Sir . Can we say that the Ashley Iles are register chisels (oval handle). I did try to make my mortises like Mr.Sellers with a normal chisels : never had great succès. But with the Iles … wow!
@gjbmunc
@gjbmunc Жыл бұрын
As I mentioned, it's mainly a question of size.
@ricos1497
@ricos1497 Жыл бұрын
Ashley Isles make all sorts of chisels. I have a set of their bevelled chisels, they're great. I got them as a gift, they're not really worth the extra outlay if I'm honest, but they look and feel nice! I don't have any mortice chisels, but I may get some now just to see the difference. I'm off to ebay!
@Jimbo878
@Jimbo878 Жыл бұрын
Mortise first then Tenon, I've struggled with this for too long, how do the "owl hands" approach this Graham?
@1deerndingo
@1deerndingo Жыл бұрын
Mortise first and make the tenon to fit the mortise.
@gjbmunc
@gjbmunc Жыл бұрын
Whatever works (in different situations), but I usually find it easier to make the tenon first and then use it to define the mortise.
@georgegeyer3431
@georgegeyer3431 4 ай бұрын
When do you remove the waste?
@gjbmunc
@gjbmunc 4 ай бұрын
As I go along.
@ikust007
@ikust007 Жыл бұрын
Never saw such a tenon marker ?!
@russellterry8671
@russellterry8671 Жыл бұрын
You can still purchase them new and can find them second hand as well. Not that uncommon. I have three old ones of different styles, mainly because they are beautiful looking and feeling.
@gjbmunc
@gjbmunc Жыл бұрын
Totally agree!
@vosifle
@vosifle Жыл бұрын
The excavation of the waste isn't shown. That's one of the trickiest parts so not to damage the edges. Why not really showing it?
@gjbmunc
@gjbmunc Жыл бұрын
You are correct: excavating the mortise can easily damage the ends ( not the edges, as you mentioned), which is why I stressed not chiseling up the ends until the correct depth has been reached, that way any damage as you pry out the waste does not impact the very ends.
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