Is this tear out - Woodworking Talk - Woodworkers Forum
 
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post #1 of 12 Old 01-06-2013, 04:32 PM Thread Starter
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Is this tear out

I picked up a new saw for making dovetails. It's a rather cheap Garlick LYNX 8" Gents saw with 20 tpi. I was practicing making cuts in poplar and the back side of the board turned out "fuzzy". Is this tear out? Is there a way to avoid this problem?
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post #2 of 12 Old 01-06-2013, 04:48 PM
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For starters, poplar is very soft compared to most hardwoods so that in it of itself is going to make it more likely for this tearing out of the fibers to occur. Another thing you can do is to put a small back board on the back side of your cuts (the face bordering where the tear out is) that is level with the top of your dovetails. Doing this will prevent the wood from ripping out like it did for you.
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post #3 of 12 Old 01-06-2013, 05:22 PM
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That looks like hard board you're cutting.

That bowl was perfect right up until that last cut...
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post #4 of 12 Old 01-06-2013, 05:26 PM
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Quote:
Originally Posted by sawdustfactory View Post
That looks like hard board you're cutting.
I was thinking the same.

Still the advise on sacrificial board on the exit side would be even more relevant for hard board.
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post #5 of 12 Old 01-06-2013, 05:55 PM
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Properly tuned dovetail saw shouldn't leave tear out. Might be too aggressive set to teeth?

That bowl was perfect right up until that last cut...
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post #6 of 12 Old 01-06-2013, 07:23 PM
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tearout yes poplar no
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post #7 of 12 Old 01-06-2013, 09:20 PM Thread Starter
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tearout yes poplar no
Ehh... The sticker from the store says poplar.

The saw is difficult to get started. I've never had a lesson on using a saw and just assumed you... saw. Is there an actual technique for using a gent's dovetail saw?

Does the saw need more or less set? I would think less. Can a diamond stone be used adjust the set?

Thanks.
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post #8 of 12 Old 01-06-2013, 09:56 PM
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looks like hard board to me too
poplar works really good
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post #9 of 12 Old 01-06-2013, 10:06 PM Thread Starter
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Is hard board a fiber composite? Here is another image of the board. What do you guys think it is.

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post #10 of 12 Old 01-06-2013, 10:19 PM
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thats poplar
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post #11 of 12 Old 01-07-2013, 11:16 AM
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No question - it's poplar. I use the stuff by the ton and can recognize it from across the room. - lol

Your "tearout" picture looks pretty typical for hand sawn poplar. It's very fiberous and "fuzzes" easily. The fuzz can be sanded away leaving a clean edge. A very close inspection will show slight amounts of tearout.
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post #12 of 12 Old 01-07-2013, 11:04 PM
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My experience with poplar is that it can vary substantially in quality. I've come across very light colored poplar (Lowes - yea I know don't judge me) that is feathery on it's face and edges where it's rubbed against other boards in the bin....stay clear of this wood. It cuts and finishes poorly like a soft pine. I suspect this is what you have. It is either sapwood or a lesser variety of poplar. Take your time and look for boards that have crisp edges and smooth hard faces. It should be reasonably hard to dent.
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