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Thread: A half-back saw
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15th July 2014, 07:20 PM #1
A half-back saw
Finished this one off today. H-back Tulip oak 025 plate.jpg
The vital statistics are: 14 inch blade, 10 tpi (rip), 0.025" plate, Tulip Oak handle. The design is based on the Disston half-back.
I had planned to work on it as my demonstration piece during the workshop on Sunday, but ended up not touching it all day. The saw plate is thinner than the couple of half-backs I've made previously, for which I used 0.030" plate. I was a bit anxious about the 'free' blade being a bit too whippy, so I hammered it to put some tension in the blade. It seemed to work a little bit, but I'm still pretty tentative with my saw tensioning, & afraid of marking the plate,so I probably dont hit it quite hard enough. In any case, the saw cut nicely & tracked straight, & doesn't feel like it wants to bend up under pressure.
As a matter of interest, the Tulip Oak is from a chunk I picked up at the wood show in May. It's a dense wood and not bad to work with, though it's easy to split out the edges if you are too enthusiastic with the rasp. It finishes nicely, but the colour & grain pattern make it very hard to see small defects in the surface. I thought I had it perfect until I applied the finish, and discovered the row of small indentations you can see across the middle . I will have to dismantle it & re-sand that side.
Cheers,IW
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16th July 2014, 01:14 AM #2Deceased
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Nice work Ian. The unique shaping of the handle and brass back is something I have not witnessed with your saw making work in the past. Kudos for working outside your normal comfort zone.
regards; Stewie.
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16th July 2014, 10:21 AM #3
Thanks, Stewie. The handle shape is one I developed from the original, over about 3 'generations', but I'm only beginning to play with brass decoration. My attempts are pretty timid at this stage, but I'll certainly play around a bit more & attempt more elaborate decoration in future. Since my saws are for (I hope) heavy use, I have been reluctant to get too wild. So there'll likely only be a few show ponies issuing from this stable, I'm afraid...
Cheers,IW
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16th July 2014, 10:45 AM #4
Very nice Ian. Is that the Dillenia that you and Paul went halvies in?
As a suggestion - what about another notch at the front top of the brass, just for a bit of visual balance?
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16th July 2014, 07:07 PM #5
That's better
Hmm, p'raps you should borrow the Optivisor now, Brett, this Mr. Magoo disease is catching! Line 2 in the original post:
.......14 inch blade, 10 tpi (rip), 0.025" plate, Tulip Oak handle (italics added to maximise embarrassment).......
I did buy it at the show, though, along with the Dillenia. Haven't used any of the Dillenia yet, but one of the participants at the w'shop used it for his handle. He didn't get to the stage of applying any polish, but it works pretty well, and gives a nice surface off the plane, & I think it should be quite good, but I'll hold on the endorsements til I've actually made a handle from it, myself.
I'm in two minds about the Tulip oak, though. It works ok, and is dense, strong stuff that should last, but man is it a bear of a wood to finish! I pulled the handle off this morning, and scraped & sanded the cheeks & middle of the handle where the marks were. Thought I had it perfect, this time, and even gave it another good sanding after it looked like the marks had gone, just to be certain sure. Then I put the shellac on, and out popped a bunch of divots I'd missed - they are almost impossible to see on the sanded wood, because of the grain pattern, but show up immediately when you wet them with finish.
Second try finally got it right. Happy now: Half_B T_oak 10tpi rip.jpg
Cheers,IW
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16th July 2014, 07:14 PM #6
Heh heh, I did actually see the Tulip Wood, but I couldn't remember if that was yet another common name for Snakewood/Dillenia. From memory it doesn't look all that dissimilar either (apart from colour which can be influenced by light source under photography).
Anyway, it's a fine job you've done there.
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16th July 2014, 07:20 PM #7
Excellent work yet again Ian
And good to see some decorative brass work coming out of the woods so to speak.
Did I start all this a while back or should I just try not to get a big head lol.
With the medallion being slightly proud do you find it in the way so to speak.
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16th July 2014, 07:21 PM #8
Do you take orders Ian ? I know someone who maybe interested.
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16th July 2014, 07:23 PM #9
At least we are even, for now.
Actually, the Dillenia doesn't seem to have any common commercial name, though no doubt the Solomon islanders have a name for it. It's cousin in Nrth. Qld. gets called "Red Beech". It's similar to the Solomons wood in texture & grain pattern, but far less dense (or at least the small piece I have in my possession is), and the S.I. Dillenia is a very deep brown colour as opposed to reddish.
If you had the Dillenia & T.O. side by side in your hands, you'd see they are very different, not just in colour, but the grain patterns are quite unalike. However, I do agree that it's hard to draw too many conclusions from photos. Especially mine....
Cheers,IW
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16th July 2014, 07:31 PM #10
I was so pleased with myself catching you out, I forgot to answer the question. Doers that put me behind again?
Yairs, I think it could do with a bit more of something, & I was going to bring the top of the front over in a similar pattern to the back, but lost my nerve. Easy to add something later, but hard to remove something if it looked ott. I may yet summon up the courage to go back & do more, but I'll think about it for a little while.
Cheers,IW
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16th July 2014, 07:40 PM #11
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16th July 2014, 07:47 PM #12
Well you were certainly the first to post on the topic, so maaybe you should get a bigger hat size...
The medallion is on the left side, which is where they are usually placed, so no fingers go near it, unless you are a southpaw, or use a very odd grip. The 3% of the population who are left-handed will just have to order theirs with the medallion on the other side....
Cheers,IW
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16th July 2014, 07:52 PM #13
Well, I'd like a nice tenon saw. Love the look of those handles.
I'm in no rush for one, but maybe sometime down the track, should you feel inclined.
Paying job of course, or else no go…. or maybe some kind of swap. What I could possibly swap with you I'm not sure of….. timber ? got silky oak, jacaranda, river oak, rosesheok, red string bark, sallywattle….or cash. anyway.
cheers
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16th July 2014, 07:57 PM #14
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16th July 2014, 08:39 PM #15
Dammit
I thought I'd said it looks pretty speccy when I saw the post yesterday
mustn't have hit the post button
Anyway
pretty speccy!
and to comment on Fency's fancy work question on the brass work
I'd suggest a little bit of scroll engraving down near the endregards
Nick
veni, vidi, tornavi
Without wood it's just ...