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Big Ripsaw and Crosscut saw project - Printable Version

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Re: Big Ripsaw and Crosscut saw project - Blacky's Boy - 03-27-2012

Corneel said:

Are you going to try tapering? Metal scraping should be fun I understood from this forum....




I'm not dead set against it. But for these (at first) I may just add some more set to the teeth. I just couldn't imagine trying to consistently scrape .005" off each side over a 26" length!




From what I hear of other saw makers, some have used a belt sander. Since this is a prototype, I may get brave and try to do something like that.

And I understand completely about the arbitrary nature of that method of finding the hang angle. That's why I drew it up in AutoCad first.


I used the average thickness of the handle to determine a very accurate center line. From there is was a piece of cake to get the perpendicular line to the toe.


Re: Big Ripsaw and Crosscut saw project - Corneel - 03-27-2012

Aha, you're cheating! Using space age methods to produce an early artefact...


Re: Big Ripsaw and Crosscut saw project - Charles Jackson III - 03-27-2012

Looks good would you be insterted in selling your hand saws?


Re: Big Ripsaw and Crosscut saw project - ZachDillinger - 03-27-2012

If you decide to sell, put me down for a large scale copy of the handsaw from Smiths Key... 28", 5 or 6 ppi rip...




Re: Big Ripsaw and Crosscut saw project - Blacky's Boy - 03-27-2012

ZachDillinger said:

If you decide to sell, put me down for a large scale copy of the handsaw from Smiths Key... 28", 5 or 6 ppi rip...






Hey hey hey! I'm still working out the bugs in the process.

But as soon as I'm ready to go into production I'll give you a yell.



What's this Smith's Key saw look like? I'm always up to look at a saw I whose name I don't recognize.


Re: Big Ripsaw and Crosscut saw project - ZachDillinger - 03-27-2012

Blacky's Boy said:


[blockquote]ZachDillinger said:

If you decide to sell, put me down for a large scale copy of the handsaw from Smiths Key... 28", 5 or 6 ppi rip...






Hey hey hey! I'm still working out the bugs in the process.

But as soon as I'm ready to go into production I'll give you a yell.



What's this Smith's Key saw look like? I'm always up to look at a saw I whose name I don't recognize.


[/blockquote]

No worries, and no rush. Here is a link that shows the Smith's Key saw:

http://www.davistownmuseum.org/bioJamesCam.htm

It doesn't show clearly the roseheaded rivets that hold the handle on. But that would be cool as well, no sawnuts here




Re: Big Ripsaw and Crosscut saw project - pjm - 03-27-2012

How have you determined the angle for the handle? It looks like you increased it to about 9*. With the weight of the saw and the number of points per inch and the angle of the teeth that could be very aggresive. I've always noticed the different handle angles and wondered how to figure that out. The bigger the angle the more force bushing the teeth into the wood


Re: Big Ripsaw and Crosscut saw project - Blacky's Boy - 03-27-2012

"How have you determined the angle for the handle?"

I'm not sure I understand your question.

The handle was traced off of a scan of a real saw handle. So all the relationships should be just as good as the one I scanned.

The hang angle of the handle in relation between the handle and saw plate was determined by following the "guide lines" presented by that Disston Saw Mfg Article I showed.

Between the two of them I think I got it as close as possible. But once I build it and test it I will know how successful I was.


Re: Big Ripsaw and Crosscut saw project - MarvW - 03-27-2012

Dom,

You will find that, that perpendicular line from the center of the hand grip down the saw plate can vary quite a bit without effecting the performance of the saw. Old saws have remained quite useable as the tooth edge gets filed so as to end up with a pointed toe. That perpendicular line is then well below the tooth edge at the toe end. In my opinion, many people are way over thinking the issue of "hang". It's not until the hang gets out to the extremes in either direction that it makes a significant difference. It's certainly not an issue of precision.


Re: Big Ripsaw and Crosscut saw project - Blacky's Boy - 03-27-2012

You mean this one? (No 187 in the drawing below)



Nice looking saw. But I'd need a clear photo of the saw handle as well as some kind of reference dimension in order to make a correctly scaled drawing of it.