36. Blind Tenons: Window-making Part Two

[@jobophoto]

The mother of all marking knives!

[@MortimerSugarloaf]

Right?! That thing is a beast.

[@gjbmunc]

It's a single bevelled Japanese marking knife.

[@jobophoto]

Thanks Graham. It’s on my shopping list!

[@nickmastro9287]

Mr Blackburn, Thank you for sharing your knowledge with us. I look forward each week to your videos.

[@gjbmunc]

You are very welcome

[@danielgeng2306]

I’ve never seen anyone cut the trench along the cut line like that before, or use a marking knife as large as that. Very skillful!

[@gjbmunc]

You're welcome!

[@mariocayer6589]

Thank you for sharing this forgotten art. Looking forward to more of your videos

[@gjbmunc]

Pleased to hear it!

[@davidbaulch3223]

Extremely impressed by the quality of your instruction and the usage of the truly traditional woodworking tools. Granted, I have only a few of those pieces with which I work, more of the "modern" equivalents but still appreciate utilizing hand tools whenever I can. Recently purchased 3 of your books and very pleased I did so. Thank you for "helping" me continue in something I still care so much about.

[@gjbmunc]

Very glad to hear it.

[@scrappystocks]

Brilliant. Easy to understand, well produced and very useful to me, although I am guilty of using some power tools. I've two sliding sash windows to make and although I've done this before this was a great refresher for me including the jig for cutting the 45 degree mitres on the mouldings. Clearly I have to make a new jig if I can't locate the old one. Your videos are great for an amateur carpenter and joiner. Previously I've always pinned my tennons as taught by my grandfather and I see you also cover this in a later video.

[@gjbmunc]

Glad to help!

[@danielgeng2306]

Viola, a window! Love it .

[@gjbmunc]

You're welcome!

[@thomashverring9484]

Thank you for yet another great video! I've recently ordered five of your books and await them with great anticipation!

[@gjbmunc]

Hope you enjoy them!

[@thomashverring9484]

@@gjbmunc I'm sure I do!

[@jeffreyteachout1139]

I discovered you about a week ago and have watched all of your videos, you have invigorated my interest in furniture quality work, I have very much enjoyed your tutorials on the true function of each tool and how to use them properly and i am now searching antique stores and flea markets for some of these treasures now that i have some idea of what i am looking at. Please keep the videos coming and Thank You for sharing your knowledge.

[@gjbmunc]

I'm so glad! And godd luck with your search!

[@craigmackenzie3983]

Excellent traditional carpentry. Thanks!

[@gjbmunc]

Glad you like it!

[@ianpearse4480]

Nice. Thank you for sharing.

[@gjbmunc]

Thanks for watching!

[@RyanJBarnard]

Thank you for the instruction on sash work. I thoroughly enjoyed the video.

[@gjbmunc]

Thank you.

[@MCsCreations]

Really beautiful work, Graham! Thanks for all the tips! 😃 It has been too hot here in Brazil for me to work on my shop (I couldn't put an AC yet), but it's getting colder! I'm going to try it in the next few days! Anyway, stay safe there with your family! 🖖😊

[@gjbmunc]

Happy to help! And safe to you, too.

[@HWCism]

Thanks. That was a pretty beefy marketing knife you have there!

[@gjbmunc]

Just a regular Japanese marking blade..

[@Aimsmallmiss]

Beautiful workshop

[@gjbmunc]

Thank you very much!

[@maryfarrell153]

I'm in love! beautiful!

[@gjbmunc]

Thank you! 😊

[@litriadesign]

Thanks for your instruction! Would the sash plane you demonstrated be used to also cut glazing bars in a larger window frame? If so, how would the work be held to cut both sides?

[@gjbmunc]

Larger pieces used various 'sticking boards' - stay tuned.

[@upton_ogood]

Hi Graham. I've just discovered your videos and I find them very useful and very interesting, and skillfully and thoughtfully made. Do you sharpen your saws or have someone sharpen them? Or do you just replace them when they get blunt?

[@gjbmunc]

I sharpen everyting myself.

[@timbarry5080]

Is that saw cut for rip teeth or cross cut? Also, were panel saws offered in rip versions or did people just use the cross cut for ripping because they were used on smaller work? Thank you

[@gjbmunc]

You can find either (or simply refile).

[@ArchEdge]

Thank you Graham. Q: Do you leave the rails longer to prevent splitting when creating the mortise, or is there another reason?

[@matthewbeaver5026]

That kinda makes sense. I wondered about the waste too.

[@MatthewBuntyn]

That's the main reason. As a bonus, the extra length also gives you a little more space to clamp the piece to your bench

[@petertaylor3150]

Horns are left long so that the corners of the window isn't damaged in transport etc. Then they are cut off before fitting. Not so important on something like this but if it's a large, heavy piece of joinery that needs to be moved around a site they really help protect it.

[@gjbmunc]

Yes and yes.

[@1deerndingo]

Thanks for that. Why bevel down when cleaning up the base of the tenon.

[@gjbmunc]

That way there is less chance of the chisel digging into the tenon itself rather than cleaning up into the corner.

[@bearshield7138]

very nice

[@gjbmunc]

Thanks

[@tuffymartinez]

Thank You Graham.... Always FUN & EDUCATIONAL ... (Graham I have access to 32 miniature Luther's? antique wood hand planes & I would like to have your opinion if possible?. I am in the Bay Area) ... TM

[@gjbmunc]

Check out Jim Bode Tools on the web to get an idea of what these may be worth as collectiblss. Certainly one or two might come in useful depending on the kind of woodworking you like. I have a few which I'm glad of occasionally. I'd say go for them if they're not too expensive.

[@baconsuzy]

The one thing I really wanted to see and it wasn't on the video. I want to see the inside cut that fits opposite the rabbet.

[@gjbmunc]

I'll do that next time.

[@pettere8429]

Why not mark the shoulder to shoulder distance directly of the first piece that you already have on the workbench?

[@gjbmunc]

Usually that's best but for the demo I had already cut the three previous joints.

[@ikust007]

Thank you sir b

[@gjbmunc]

You're welcome.

[@brucewelty7684]

It looks like you have similar issues with Western saws as I do.

[@gjbmunc]

Nothing's completely foolproof.

[@ikust007]

Sir: will you peg the tenons ?

[@gjbmunc]

Not necessary on a small piece like this where there is no outwarsd tension.

[@dominicgoodwin1147]

This doesn’t make sense, surely. If you have put the ovolo on the stiles and the rails, then cutting the tenons square , they won’t match the ovolo of the stiles. Either I’ve missed something, or you’re oversimplifying the process.

[@gjbmunc]

The ovolos are cut on exactly the same place on both rails and stiles - so they should match peerfectly...

[@dominicgoodwin1147]

Well no, not really. Once you have cut the tenon, you then need to use the mirror image of the ovolo on the edge of the rails to make the stile ovolo fit like a glove into the recessed “negative” ovolo of the rail. That’s why a router bit set has two elements; a guided ovolo cutter, and a cutter (which can’t have a bearing because the tenon is in the way) which is the mirror image of the ovolo.

[@aalove2010]

You're right that Graham didn't show part of the preparation of the stiles. Starting at 9:32, you can see that he's pared or cut away the ovolo around the mortise so that the rail seats flush. That was done off camera. He then shows how he uses a 45-deg jig to miter the ovolo where the rails and stiles meet at the insider corners of the windows.