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Old 03-06-2014, 03:51 PM   #1
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Default How often SHOULD blades break?

OK, I'm officially at my 1 year anniversary for scroll sawing.

In that time, I have broken 1 blade.

I use Flying Dutchman blades (mostly Ultra Reverse and some Polar), and I change out the blades after 30-45 minutes of use.

I'm assuming that I must be doing something wrong if I don't break more blades. Should I have the tension higher? (I sometimes get blade deflection on 3/4 inch or thicker pieces if I'm not very careful.)

Just curious as to what other people see as the "normal" time before blades break. Am I changing too frequently, and that is why they don't break?

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Old 03-06-2014, 03:55 PM   #2
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I have not broken a blade in over 4 years. You are doing things right in my estimation. It is not a goal to break blades. We all get some deflection on thicker pieces, if we don't monitor our technique.
Keep up the good work.
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Old 03-06-2014, 04:18 PM   #3
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If it ain't broke, don't fix it. Seems you are doing just fine.

Just for grins, leave a blade in longer. Eventually it will either;

stop cutting
start smoking
break

or some combination of the above.
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Old 03-06-2014, 04:20 PM   #4
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Actually, it sounds like you are doing everything right!
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Old 03-06-2014, 05:17 PM   #5
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I use my blades until the break. I am always cutting 3/4" and thicker hardwoods so they do not last all that long. The slower I go the longer they last.
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Old 03-06-2014, 09:06 PM   #6
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Wait, your blades DON'T break, and you want to know what you are doing wrong? I'm so jealous.
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Old 03-07-2014, 01:23 AM   #7
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ROFL at/with bit101...Now that is funny!
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Old 03-07-2014, 08:09 AM   #8
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OK, it may seem like a counter-intuitive question; I had just started wondering if I had the tension a bit wrong (and that was causing the mild deflection problems) or if I was changing the blades way too often and was wasting money by not letting them go longer, etc.

The sense I had from reading other posts was that blade breakage was a normal part of scroll sawing; since I wasn't breaking blades, the engineer in me detected a variance from "normal" and I was trying to isolate the cause. (Sorry; once the Navy nuclear program gets their hands on you, it brainwashes you forever!)

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Old 03-07-2014, 08:39 AM   #9
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You obviously have a feel for the tools you use.
With my first real saw (Delta ss350) I broke many blades per ornament. I use the Olson 2/0R, I was pushing too hard and using the blade too long. With my Hawk + 8-9 years of scrolling under my belt cutting the same ornament with the same blade I will use 1 or 2 blades. The Baltic birch 1/16 stack of 6 is very hard on the blade so I usually toss them after 15-20 min or less.
I maybe break one or two blades a year mainly because I push them too long or hard. I have never broken a blade bigger than my 2/0.
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Old 03-07-2014, 02:44 PM   #10
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Well, darn, I must really be doing something wrong. I break a lot of blades. Probably because I don't change them as frequently as I should. But as long as I get a good cut, no fuzzies on the back, etc, I just keep going until they break. Course, it could be the "lead foot" I use when cutting. LOL Patience is not my middle name.
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