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Thread: Burl Backsaw build.
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7th June 2014, 02:35 PM #16
Hi Stewie,
No doubt about it, you saws just get better and better... I want a workshop calendar with that burl handled saw
On the question of spine weight, I've done 14" with 3/4 x 1/4 spine and it feels ok. On the other hand, if you want to try out a heavier spine, just let me know and I'll slit some for you.
The 14" one was with 20 thou plate as well, it cut like a laser.
There's still 30 meters of 3/4 x 3/8 brass sitting in my workshop that George White delivered by mistake... I'm hoping they can pick it up next week.
Ray
PS.. I'm hoping to be back making saws soon.
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7th June 2014, 09:00 PM #17Deceased
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8th June 2014, 05:26 PM #18Deceased
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8th June 2014, 11:01 PM #19
Stewie
There not surface defects
There character part off the one that makes a whole.
It's looking great
Makes me want to start making another saw
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9th June 2014, 12:22 AM #20
Yeah, very nice indeed Stewie. As Matt says, it's all character.
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11th June 2014, 03:22 PM #21Deceased
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11th June 2014, 06:38 PM #22
Hi Stewie,
Looks good!
What was the brass darkening solution? I read somewhere that garlic will darken brass. ( plus keeps the vampires away from your saws )
Ray
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11th June 2014, 08:19 PM #23Deceased
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12th June 2014, 02:11 PM #24Deceased
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The brass back has been bonded in place with a full length bead of Loctite on both sides of the saw plate. That will prevent the possibility of corrosion ever taking hold within the section of saw plate inside the slot.
As I am wanting a slight aged appearance to the backsaw, I have treated the saw plate with Cold Metal Blue, that's then been rubbed back to a lighter hue 30 min after application. The saw plate is then well soaked in WD-40 to stop further blueing. When fully complete the saw plate assembly will be thoroughly rubbed down with a buffed soft paste wax.
I will leave the assembled backsaw hanging to fully dry off, until I am ready to apply masking tape to each side of the saw plate and start hand filing the saw teeth. Yep. The old traditional way.
The masking tape will protect the saw plate from being scratched while positioned in the saw sharpening vise.
With a 16 inch tooth line this is the longest and deepest of any of my previous backsaw builds.
Stewie;
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14th June 2014, 06:29 PM #25Deceased
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Time to shape the saw teeth.
1st job is to adhere the 13 ppi template to the top edge of the saw plate followed by masking to tape to each side to protect the plate from being scratched while installed in the saw sharpening vise.
After that its time to notch the ppi spacing with the V point of the file facing directly down. I repeat this step twice to make sure I have formed a good seat for each tooth.
The paper template is then removed and the notched spacing are coated with blue marking dykem. The 1st 2 teeth at the heel end of the plate are being left untouched as this corner edge will cut off at an angle later on.
The file holder is then adjusted to a 10 degree Rake Angle ready to shape the saw teeth.
I add a full stroke of the file to each tooth; reapply the Dykem marker and repeat the same step. This continues up until I start to see the odd tooth getting close to losing its flat spot. From that point these and other teeth that progress to the same stage are missed during the full runs of filing.
In the following photo I have started my final run of shaping the teeth.
When complete I will then reapply the Dykem marker and give the teeth a light jointing with a flat file to insure all the points of teeth are at the same height.
Stewie;
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14th June 2014, 08:24 PM #26
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14th June 2014, 08:49 PM #27Deceased
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15th June 2014, 04:42 PM #28Deceased
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Saw teeth sharpened and set.
Now to test the saw and see how it performs.
The kerf is nice and tight, and it follows a straight line well. A properly sharpened saw delivers a much higher pitch with each stoke compared to that which is poorly done. This backsaw delivers the right pitch so its a sharpening job that's been well done.
Stewie;
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15th June 2014, 04:50 PM #29
That looks tremendous Stewie - a grand job indeed!
The brass and steel treatment works very, very well with the burl. It essentially looks as old as anything, but kept in really fine condition.
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15th June 2014, 05:13 PM #30Deceased
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