Scroll saw question: When to use round blades - Woodworking Talk - Woodworkers Forum
 
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post #1 of 6 Old 03-06-2013, 02:40 PM Thread Starter
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Scroll saw question: When to use round blades

When do you use round blades and what blades should I use for something like this:
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I am not doing that box but it is pretty close to the pattern I am going to do. I think the spaces are tighter.
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post #2 of 6 Old 03-06-2013, 04:09 PM
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I have used round, or spiral blades in the past, but don't care for them. A flat blade, at least to me, is easier to control. One of those, ask 3 people, get 3 answers things.

I think I know what you are planning on cutting, and the design, as well as the wood determines blade usage.

If you were cutting it from 1/4 inch red oak, I would suggest a 2R blade. R meaning reverse tooth. Those are quite handy in almost completely eliminating any sanding.

Hope that helps.
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post #3 of 6 Old 03-06-2013, 04:19 PM Thread Starter
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I am using 1/4 inch maple. This is the pattern:
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I have used a spiral and 20 tpi blades so far. Just trying to get use to it. How do you determine what speed? Size and/or type of wood? I have kept the speed rather low so far. I can only do about 4 sections at a time before I need a break LOL.

BTW: Do you ever score the wood first? Or just go by the pattern.
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post #4 of 6 Old 03-06-2013, 04:28 PM
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I like that pattern.
Speed of saw is another one of those things that varries from one user to another. I would just suggest making some practice cuts at different speeds, and see where you are most comfortable.
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post #5 of 6 Old 03-06-2013, 05:41 PM
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Let's clear the air here. Spiral blades definitely have their place in scroll work, but the pattern that you have shown up is definitely not that place. Spiral blades have a very large learning curve but once you master that curve, you'd be amazed what you can accomplish. The problem with the pattern that you've shown us, is that there are pointed peaks and valleys. It is physically impossible to get anything pointed with a spiral blade. Period. If you are using 1/4" maple, I would use a #2R, reverse blade or a 2/0 Reverse cut blade. Round off the back of the blade with a small sharpening stone and keep the speed of your saw at about 50% to start with. There's no need to rush.
If you have any other questions, feel free to ask.

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post #6 of 6 Old 03-06-2013, 05:45 PM Thread Starter
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Quote:
Originally Posted by Kenbo View Post
Let's clear the air here. Spiral blades definitely have their place in scroll work, but the pattern that you have shown up is definitely not that place. Spiral blades have a very large learning curve but once you master that curve, you'd be amazed what you can accomplish. The problem with the pattern that you've shown us, is that there are pointed peaks and valleys. It is physically impossible to get anything pointed with a spiral blade. Period. If you are using 1/4" maple, I would use a #2R, reverse blade or a 2/0 Reverse cut blade. Round off the back of the blade with a small sharpening stone and keep the speed of your saw at about 50% to start with. There's no need to rush.
If you have any other questions, feel free to ask.
Well, about 25 percent done after an hour LOL. Don't know if that is good or not. But I defintly need breaks every 15 minutes or so. I have been using both blades just to get a feel for it. The spiral parts look like I will have to do a lot of sanding. The 20 tpi blade is smoother.

This is a trial run. My wife loves unicorns and i am going to eventually use this template for a jewelery box for her. I will post what it looks like when I get done.
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