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Weird saw tooth pattern

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Forum topic by Kreegan posted 691 days ago 1204 views 0 times favorited 12 replies Add to Favorites Watch
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Kreegan

1452 posts in 772 days


691 days ago

Topic tags/keywords: question

I acquired this ~20” EC Atkins hand saw recently on eBay. I was looking over it after it came in the mail and noticed that it has a weird saw tooth pattern. Instead of the teeth all being uniform in length, it appears as though the teeth on this saw are in pairs, with a smaller tooth in front of a larger tooth. Has anyone seen this before and know why the teeth were shaped this way? Thanks!

Rich;)


12 replies so far

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patron

13001 posts in 1966 days


#1 posted 691 days ago

it could be from hand sharpening

but with the stager on each tooth
one side would cut deeper
than the other

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

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Dennisgrosen

10850 posts in 1740 days


#2 posted 691 days ago

looks like patron said its an uneven sharpening of the saw
if you look at no.3 of the high tooth from right you have three low teeth from that one
to the left side before another high comes

and if you looks closer at the bottom of the filings you will see they don´t reach the same debth either

Dennis

View IsaacH's profile

IsaacH

128 posts in 722 days


#3 posted 691 days ago

Try the forum at backsaw.net….looks like a saw makers forum. Maybe they could help. Definitly curious myself….make sure to post what you find out.

-- Isaac- Decatur, GA - "Your woodworking....NOT machining parts for NASA!!!"

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Bluepine38

2876 posts in 1711 days


#4 posted 691 days ago

Definitely weird looking, hope you find out what caused it.

-- As ever, Gus-the 75 yr young apprentice carpenter

View Bill White's profile

Bill White

3404 posts in 2586 days


#5 posted 691 days ago

Send the pic to Matt Cianci-The Sawwright in Rhode Island. He’ll help ya with a fix or sharpening.
Bill

-- bill@magraphics.us

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rance

4128 posts in 1786 days


#6 posted 691 days ago

The pattern is consistent. It was meant to be like that, I just can’t tell you why. I’ve seen it before.

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View knockknock's profile

knockknock

195 posts in 798 days


#7 posted 691 days ago

Here’s my guess. The smaller teeth are rake teeth with a larger gullet in front of them, to carry the saw dust out of the cut, so the big teeth can keep on cutting.

View Kreegan's profile

Kreegan

1452 posts in 772 days


#8 posted 690 days ago

Yeah I don’t think it’s a result of hand sharpening. It looks very deliberate to me. The rake tooth idea sounds very plausible to me. I will try backsaw.net and see what they think. Thanks!

Rich;)

View gdpifer's profile

gdpifer

42 posts in 1305 days


#9 posted 690 days ago

I’d have to agree with those that said it was misfiled. The teeth must be the same height and when set properly and it is held level and plumb you should be able to lay a washer or other item on the teeth without it falling off. When I had my sharpening shop I kept a washer hanging on the wall next to my filer and checked every saw that I sharpened. If you find a few teeth that are off near the handle it is where one starts filing and may have had to make an adjustment before filing the real cutting area. To correct your saw one would need to retooth it, cut new teeth, sharpen and reset it.

Garry

-- Garry, Kentucky

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Kreegan

1452 posts in 772 days


#10 posted 689 days ago

I emailed Matt Cianci, who told me this was indeed a result of poor sharpening. Apparently this is the “cows and calves” anti-pattern, which he address in this blog post:

http://thesawblog.com/?p=973

Rich;)

View Bill White's profile

Bill White

3404 posts in 2586 days


#11 posted 689 days ago

HAH! Told ya he could help.
He’s a pretty cool guy, and has built quite a business.
Bill

-- bill@magraphics.us

View Surfside's profile

Surfside

3079 posts in 799 days


#12 posted 689 days ago

Wow! Rich, you’re the man!

-- "someone has to be wounded for others to be saved, someone has to sacrifice for others to feel happiness, someone has to die so others could live"

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