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18th September 2010, 05:40 PM #16
Worked in a couple of hours in the workshop this arvo'. Spent most of that time four-squaring the rails and stiles for the ends of the frame, but I also managed to rough cut the double tenons on one of them for you guys.
Basically these were laminated from 25 x 85mm stock (mostly because that dimension fell inside what short stock I had laying around) so that I didn't really need to cut the tenons. As mentioned earlier, this trick was inspired by Chris Schwartz in his book on workbench design, though he uses four pieces to make a single tenon.
In an effort to ensure that I get all of the critical dimensions accurate I've thicknessed each of the laminations to precisely 25mm to match the forstner bit I'm using for the mortices. So, I only have 5mm shoulders on two sides of the tenon. I reckon 16 tenons at 25 x 75mm and a depth of 60mm will be strong enough. Chris preaches overbuilding... does this qualify?
Next I'll be finishing the rest of the tenons ready to start marking out the mortices in the legs (Chris also makes the tenons first)."Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so."
- Douglas Adams
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18th September 2010 05:40 PM # ADSGoogle Adsense Advertisement
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26th September 2010, 06:47 PM #17
My arms hurt...
Swinging a mallet to make just eight mortices doesn't sound like hard work, does it? A 25mm forstner bit gets rid of most of the waste, but cutting the corners alone (all 32 of them) for just one end of the frame is making me re-think the wisdom of this many mortice and tenon joints.
I did a training ride for the 'Around the Bay in a Day' bike ride yesterday, so now I'm sore all over. It's been almost 18 months since I rode, so even the 50km Westgate Bridge ride will be a challenge for me I think.
Anyway, as you can see I've completed the joints for the left end of the frame and they all fit nicely. Just a little mallet persuasion is all that's required. Even just dry joined I'm unable to make this frame wrack at all. The lines around the tops of the legs are the level of the bottom of the bench top, I haven't cut the tenon into the legs yet.
Of course, next will come more sore arms for the right end."Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so."
- Douglas Adams
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26th September 2010, 07:20 PM #18
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8th October 2010, 02:08 PM #19
Been off work all week with a chest infection, so I spent a half hour here and there to get the other end finished. The Harold & Saxon chisels have taken a severe pounding while making all the mortices, particularly the 1/2". It hasn't yet been sharpened and it's now a little harder to pare with, but it's held up considerably better than any other chiesl in my collection, including the Titans. Most impressive.
Next I'll have to select/scrounge some timbers for the front and rear stiles. I also haven't decided whether to make this a knock-down frame."Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so."
- Douglas Adams
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8th October 2010, 03:29 PM #20
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8th October 2010, 04:00 PM #21
I may take you up on that offer, though I still haven't been through the stock pile. I'm looking for a length of ~120x30mm @ 1.5m for the front stile and runner for the deadman. I'll be in touch if I can't find anything.
"Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so."
- Douglas Adams
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15th December 2010, 12:16 PM #22
I can feel the warmth now.
Had a bit of luck recently; firstly I found a scruffy looking 2"x6" board about 2m long in the hard rubbish. Not sure what the timber is, but it's red like Jarrah and somewhat more brittle... well seasoned though. This has already been used for the front stile, though I had to mill it down to about 130mm x 40mm, no pics yet. I've left a few of the original saw marks in it for character. Have also completed the rear stile, but alas there are no pics of that yet either.
Secondly, it looks like we'll have no trouble keeping warm next winter. One of the big gums across the road was dropped and I managed to collect the lion's share of the useable timber from it. All up I have well over two tonnes now, so I think we'll be fine and warm.
I'm going to aim low this Christmas and attempt to complete the frame before I go back to work. Seriously, that's about a days work. I reckon I can manage that."Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so."
- Douglas Adams
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15th December 2010, 12:41 PM #23
I thought that when they pulled that school down you would have had a good ferret around and dragged some timber home. Good to see you found some elsewhere and have put it to use. Pictures are required you know
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15th December 2010, 01:43 PM #24
I did ferret around actually and it was one of those that I brought home the first time, one on the other side of the school. This time it was one of the big gums directly across from me. Didn't even have to bother with the car this time, just the wheel barrow. Had to share this loot with someone else in the street, but he only wanted the smaller stuff because he has no means to split it, so I got all of the big bits. YAY! The only reason I haven't gone nuts over there is becasue I've never felled a tree before and, well, safety first, you know. If it's already fallen or someone else is doing the dangerous work and getting payed for it, I'm happy to do the rest.
I've worked in IT all my adult life, felling trees just isn't exactly my thing."Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so."
- Douglas Adams
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19th December 2010, 07:50 AM #25
Hi K man, just had a read through and a very enjoyable WIP
Love those double tenons, very neat, and what a great idea for producing themThe time we enjoy wasting is not wasted time.
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19th December 2010, 08:05 AM #26
Coming along Kman, as the guys have said, lovely neet work.
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19th December 2010, 09:03 AM #27GOLD MEMBER
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Very nice workmanship there mate - i'm looking forward to seeing more pics !
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19th December 2010, 09:04 AM #28
Keep up the progress reports!
.
I know you believe you understand what you think I wrote, but I'm not sure you realize that what you just read is not what I meant.
Regards, Woodwould.
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19th December 2010, 11:52 AM #29Wood and Metal Enthusiast
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That joinery looks so crisp and clean, look forward to the next installment
Live life to the fullest, you have to go big and do everything with your all or why do it at all?
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20th December 2010, 02:20 PM #30
Thanks for the encouragement folks. I have made some good progress since the last set of pics were posted, but I've been rather focused on getting organised for Christmas lately.
I've also been gathering the few extra tools I need to get this job done. I didn't own a sliding bevel until last week so I will have some pics of that and a marking knife from Chris Vesper to post as well.
I'm working on a novel approach to laminating the top also. Rather than laminating the peices on a seperate bench I'm looking to use the completed frame as a base. Traditionally a Roubo bench wouln't have rails on the frame ends, but because I don't realy have a big bench to work on or a lot of clamps to work with I'm thinking I'll use the leg tenons and rails as a frame for the glue-up. I haven't worked out all the kinks in this thinking yet, it's a work-in-progress.
I will get out to the shed soon and take some pics."Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so."
- Douglas Adams
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