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08-04-2008, 05:08 PM
| #1 |
| Junior Member Join Date: Aug 2008 Location: Parker, SD
Posts: 7
 |  HELP! Breaking Blades- I have a brand new 18" Craftsman Scroll Saw. I have (I thought) enough experience to know how to properly use it...I'm "trying" to cut out small animals for my twin Grandsons' Noahs Arc, all out of 3/4" pine. I can't even get one animal cut out without snapping a blade. I'm using 5" pin-end, finish cutting, 18.5 tpi. I also tried using 25 tpi with pretty much the same results, the blade snaps at the bottom in the first few teeth. I've NEVER had this much trouble with blades breaking on my old saw. It scares the poopoo out of me every time!! |
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08-04-2008, 05:30 PM
| #2 |
| Senior Member Join Date: Jul 2003 Location: Hamilton Ontario
Posts: 985
|  I would suggest you don't have the tension tight enough. If the blade is at all loose it will catch in the kerf and break very easily. Also make sure the blade is not in upside down, the majority of the teeth should point down. I'm not familiar with pin end blades, but I don't think they'd be much different from staight end blades. The number one cause of blades breaking is not enough tension, so tighten up and your problem should go away. Hope this helps Marsha
__________________ LIFE'S SHORT, USE IT WELL |
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08-04-2008, 05:44 PM
| #3 |
| Junior Member Join Date: Aug 2008 Location: Parker, SD
Posts: 7
| I'll give it another turn! I generally listen to my "pluck" for the right tension...but possible not the right note!! I'll try another twist on the knob! Thanks Marsha! DaVida |
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08-04-2008, 06:04 PM
| #4 |
| Senior Member  Join Date: May 2008 Location: Vancouver Island, BC. Canada
Posts: 1,830
| Isn't the teeth count a bit high. I find that a lot of teeth /inch means that I am pushing the wood to make it cut and breaking blades is a result. Alan. |
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08-04-2008, 06:14 PM
| #5 |
| Junior Member Join Date: Aug 2008 Location: Parker, SD
Posts: 7
| The 18.5 tpi seems to cut the easiest and with the least resistance for my small animals. These animals are ranging from turtles at 1" tall to giraffes that are 5 1/2" tall. |
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08-04-2008, 09:56 PM
| #6 |
| Senior Member  Join Date: Jan 2005 Location: Janesville, WI
Posts: 871
| detzishere, as Marsha suggests you probably have the tension too loose. Too much tension is better than too loose. Push the wood directly into the teeth and let the saw do the work. Pushing sideways on the blade will make it break. 3/4" pine is not the easiest wood to cut, try some poplar. You may be pushing too hard and causing the blade to heat up. See if a new blade cuts better than the one you are using, could be a dull blade. I would use a blade with less t.p.i. 7 to 10 t.p.i. for 3/4 " pine.
__________________ Mick, - Delta P-20 |
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08-04-2008, 11:37 PM
| #7 |
| Junior Member Join Date: Aug 2008 Location: Parker, SD
Posts: 7
| Yes Mick, I'll try tightening the tension a bit more. I'm going through the blades so quickly (breaking) that they don't get a chance to get dull or even to get hot. I have made a lot of things witth the scrol; saw, I've been using one for about 12 years. This Arc that I'm trying to make now is the 5th one. I've made it a tradition that each grandchild receive one by their first Birthday. So I have some experience with scro;; saws. I'm not pushing the wood, I am not using any side pressure either. That's why this whole braking blade thing has me so confused. I usually use the blades with 18 to 25 tpi on my Arcs, critters, puzzles, etc. When you use less teeth per inch- doesn't that make the blade bigger? I'm making some pretty intricate cuts. The 18.5 tpi says (on the package) "for sharp turns, extra thin to cut marquetry or soft wood up to 3/4" thick." For Finish Cutting. Your help and suggestions are definitely appreciated! DaVida |
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08-05-2008, 09:53 AM
| #8 |
| Dino  Join Date: Oct 2007 Location: Fergus Falls,MN
Posts: 680
| I would suggest using less T.P.I., especially with 3/4" pine. Pine is soft and cuts eaisly but it also clogs the blade if you are using a higher T.P.I count. Less T.P.I with pine allows the blade to extract the wood chips. The pine you are using might have a little extra sap in it. A blade with a high T.P.I count clogs eaiser when cutting pine that is a little sappy. I have had this issue when using pine. Good Luck Dean |
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08-05-2008, 12:23 PM
| #9 | |
| Pajaro Studio Dallas  Join Date: Jul 2007 Location: If it ain't Texas, it Just ain't livin.
Posts: 1,352
| Quote:
If you need help breaking blades I can show you how............. 
__________________ Pajaro Pete Vermont Yankee in Texas Member " Scrollsaw Association of the world " Excalibur EX-21 fanatic One of the Chosen few "You can question the sincerity of almost all of the people in your life, but you don't question your dog's!" . | |
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08-05-2008, 09:10 PM
| #10 |
| Senior Member Join Date: Jan 2005 Location: Janesville, WI
Posts: 871
| detsizhere, check your PM's
__________________ Mick, - Delta P-20 |
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