New (to me) 10" backsaw teeth recutting ppi question
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I just got a used 10″ Disston backsaw from Ebay. I was aiming for a dovetail/tenon/general small saw, as my other backsaw is a 14″ 12ppi backsaw. This new 10″ saw is also filed at 12ppi and I’m thinking that it may be a little too coarse for what I want to do with it. I’ve hammered a few bends out of the blade and joined it (the teeth of very irregular lengths). Removing all the teeth and starting again would not be my first choice, but they do need a lot of work and it I think I might like something with finer teeth. Based on Paul’s saw posts, it seems like he likes 14ppi for dovetail saws. Would refiling the teeth on a 10″ backsaw to 14ppi seem like reasonable idea? Should I just stay with 12ppi? Any suggestions?
[quote quote=121460]If the teeth are really bad, it’s really difficult to get them back to good shape, so removing the teeth and starting fresh is generally a good option. A 10 inch dovetail saw with 14-16 tpi is a good place to start.[/quote]
Thanks, for the reply, maybe I’ll go for 16 per inch using Paul’s progressive cut method. Which if I understand correctly means that it will do a fairly good job with cross and rip cuts?
Did you use the templates from the following. http://www.norsewoodsmith.com/content/saw-filing-templates
There was a reason the old boys from yester year were artisans. Filing saws is an art that comes from lots of practice. The important part is does the saw cut wood smoothly now? You can work on refinement skills as you sharpen more saws. I have a couple beaters that I use to practice crosscut filing on, large teeth like 6-7 tpi. It’s easier to see what you are doing.
[quote quote=121548]Did you use the templates from the following. http://www.norsewoodsmith.com/content/saw-filing-templates
There was a reason the old boys from yester year were artisans. Filing saws is an art that comes from lots of practice. The important part is does the saw cut wood smoothly now? You can work on refinement skills as you sharpen more saws. I have a couple beaters that I use to practice crosscut filing on, large teeth like 6-7 tpi. It’s easier to see what you are doing.
[/quote]Yea, I used those templates, they certainly helped. I re-joined the tops of the teeth I first cut and re-sharpened them. It seems much better now. I still need to clean up a few teeth and set the them before I can see how it cuts. I’ll give a full report when it’s done.
I’m almost/mostly/finished for now… On my first test cut I hit a staple in the end of the 2X4, ugg. But it seemed to cut nicely after a little touchup. I used the minimum setting on my saw set, and I think that may be a little too little (I’m guessing because the there are some small dents in the saw plate from being hammered that are binding, not so much that the set is too little for the plate thickness). I’m happy with it for now, and it seems to do what I wanted a small saw for. I think I’ll use it for a while, let the wood polish the blade some and then lightly re-join it and sharpen again.
The two photos I guess show the same thing, but the wood on the right is cut with my 14 inch backsaw and the one on the right with my new 10inch saw that I just finished. As you can see the smaller saw is leaving a nicer cut with much less tear out.
Thanks for the help folks!
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