Thread: Burdekin Plum backsaw.

Originally Posted by planemaker

Looking at the timing of Rons Pink Ivory post, and your request, Ron was 3 hours ahead of you Dale.

Stewie;

I had seen it over on another forum & thought it would be nice for some of the guys to see Rons work. I saw the post here after I had mentioned it.

Originally Posted by RayG

Hi Isaac,

In addition to the angle of the grip relative to the tooth line, there is another variable, and that is the height of the center of the grip from the tooth line. IanW likes his saws to have the grip center close to the tooth line, and this arrangement also interacts with the height of the work. With the work higher, the lower hang angles work best.

As a general rule of thumb, the hang angle gets lower as the length of the saw increases..

Interesting to know how the hang angle and centre height interact. Is there a relationship as the centre height moves up or down the hang angle needs to change in unison to compensate?

Originally Posted by Isaac S

These pictures?

closed handle hang angles.jpg open handle hang angles.jpg

Thanks Isaac,

Yes, that's the one! nice find. I can stop looking now..

He is measuring a different angle, but I think it's easily converted, probably, (90 - BBrode_hang_angle) and add subtract a correction for canted blades, the reason I think he is measuring the wrong angle, is that "higher" hang angles would be lower numbers with his method. I would have liked to know the lengths of the saws he measured.. maybe a good research topic to see how hang angle relates to blade length in 18th and 19th century saws.

Regards
Ray

PS Sorry for the thread hijack Stewie,...

There is a whole thread starting here ... Handsaw Handle Angles - Open Handled *PIC*

that I haven't doven into yet

And again apologising to Stewie ... one little aside to Isaac ...
your blog models force as acting along the line of the hang ... or perpendicular actually ... and I'm not sure I agree with that.
Obviously the resultant motion is basically back and forth only ... hmmm .... I don't want to disturb this thread.
I'd better go read them again and think about it some more.

Cheers,
Paul

This is quite common on the net so ... has anyone mentioned ...
" it seems to me that the hang angle, should be such that your index finger points towards somewhere around middle of the tooth line, if you follow this general argument then it seems logical that shorter saws will have higher hang angles, and longer saws would have lower hang angles, (I'm measuring the hang angle as angle between the line of the grip to a line at right angles to the tooth line) So a high hang angle is typically a small dovetail saw, and a low hang angle is typical of a normal handsaw. "

Also ... for Ray ... not a lot left ...

Bob Brode -- A gallery of tools

Bob Brode

Cheers,
Paul

Hi all. I completed some more work on the Burdekin Plum backsaw today. As you will the blade has been shaped and fitted, as well as the fit of the brass back within the handle. Both the tenon as well as the mortise within the handle have been stepped similar to how Pedder & Klaus do on some of their backsaws. Just a not with the blade used. It one of a number that Ron Bontz sent to me as a gift a while ago. All pre-toothed. This blade is 0.025 plate, after shaping the heel has a 10" tooth length, and is 70mm in depth. Its been and toothed at 14 tpi, with a 25 degree rip tooth. I have also scribed 2 horizontal lines to each face of the brass back so it can be later shaped with 2 deep bevels. If this doesn't look quite right I still have the option of rounding these off. I still have to complete the final smoothing off with the shellac finish on the handle, but I leave this till the end of the saw build.

Stewie;

Hi Paul. At what point of the tooth line the index finger points to is a major debate by itself as some saw makers prefer a higher set handle in general, whereas others like myself prefer it lower set so that the wrist is more in a horizontal line to the tooth line. Probably best to raise a new post on that one as you may end up with a major influx of replies debating the pro's and cons. Isaac has some good information about this topic on his website that covers correct posture & working height in relation to best hang for a backsaw. There are so many variables including the general height of the user that make this topic rather difficult come up with 1 single answer to correct hang. The final answer may be it just come down to finding the right backsaw that suits you the individual. It gives me a headache just thinking about the whole debate. But certainly worth the effort to hear all the differing opinions.

Stewie;

Hi. I have moved this thread to the new dedicated Saws - Handmade, sub forum.

I would also like to personally thank Ian () and Neil for their support in making this forum listing available to further meet the needs of our forum membership.

Stewie;

After a few requests by members that make their own tools we have put in sub Forums under Homemade tools and jigs for the saw and chisel makers here:Saws- handmade and here: Chisels-handmade

The Mods and Admins will be moving threads across to these Forums but if you see a thread or post pertaining to these activities that we miss can you post a link here and it will be moved. Thank you.

Originally Posted by planemaker

Hi. I have moved this thread to the new dedicated Saws - Handmade, sub forum.

I would also like to personally thank Ian () and Neil for their support in making this forum listing available to further meet the needs of our forum membership.

Stewie;

After a few requests by members that make their own tools we have put in sub Forums under Homemade tools and jigs for the saw and chisel makers here:Saws- handmade and here: Chisels-handmade

The Mods and Admins will be moving threads across to these Forums but if you see a thread or post pertaining to these activities that we miss can you post a link here and it will be moved. Thank you.

That's good stuff, hopefully it will become a small mecca of toolmaking! Hopefully in the future we also get some plane making happening!

Originally Posted by DSEL74

That's good stuff, hopefully it will become a small mecca of toolmaking! Hopefully in the future we also get some plane making happening!

In the future?

I think Derek & Ian & Matt & our italian cousin & many others have been at that one for a while!

(not to mention eg Ron Brese!)

Cheers,
Paul