Jig Saw issue - Router Forums
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post #1 of 19 (permalink) Old 06-05-2019, 08:56 AM Thread Starter
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Default Jig Saw issue

- i have an old Craftsman variable speed jig saw purchased several decades ago. It runs well and only gets occasional use. It has a "feature" that makes me contemplate its demise each time I do use it.

- when making curved cuts in thicker material <say anything > 3/8" it puts a significant 'bevel' on the cut. In other words, it does not make a true vertical cut. I suspect part of the issue is that the distance from the blade mount to the bottom of the plate <which would be the top surface of the wood when cutting>. It seems big compared to pics of newer jig saws. Its apx 1-5/8". In my mind, a shorter distance would put the wood closer to the blade mount and resist the blade 'flexing' when cutting curves.

- I don't think I am feeding the material too fast <pushing too hard> and fast or slow feed or, fast or slow rpms seems to make no difference to its natural ability to bevel the inside of a curve.

- I am off base thinking a new one <either orbital or regular> is going to give me clean(er) curves or is this one of those "they all do that to some degree" things ??

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post #2 of 19 (permalink) Old 06-05-2019, 09:19 AM
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I have a B&D I bought in maybe 1976. Works fine. But the blade holder, or whatever it's called, is a bit worn now. Cuts straight, but curves are not straight up and down. No biggie, I never make finishing cuts with one anyway, old OR new, just straight cuts, or rough cuts; then I sand to the line. If you don't want it anymore send it along to me. I can use it with no issues.

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post #3 of 19 (permalink) Old 06-05-2019, 09:41 AM
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I have a newer Craftsman and it does the same thing. The blade even looks out of square with the the table by 10 degrees. I can't seem to get it square,so don't use it. I bought a cordless Makita and am very happy with it. I had an old craftsman that had the scroller feature on the blade that I could rotate while cutting, was very handy cutting out vanity tops for sinks. The newer craftsman had the same feature ,but was not cutting square. I only use mine for rough cuts too.
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post #4 of 19 (permalink) Old 06-05-2019, 10:16 AM
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My Bosch cuts nice curves in 3/4 and, thinner material. My old Craftsman would deflect, though. I only use Bosch blades. They seem stiffer.
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post #5 of 19 (permalink) Old 06-05-2019, 10:41 AM
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NO BLADE GUIDE STABILIZER...

move to the head of the class and go w/ a Bosch...
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post #6 of 19 (permalink) Old 06-05-2019, 11:13 AM
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Some jig saws have a blade guide above the plate which helps them make straighter cuts. As Gene mentioned, the blade quality also matters.
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post #7 of 19 (permalink) Old 06-05-2019, 11:43 AM
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Is the shoe getting loose and tilting the saw? The other issue might be that the blade is bending as you make the curve and causing the bevel.
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post #8 of 19 (permalink) Old 06-05-2019, 11:55 AM
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quick fix- better blades and slow down your feed.

long term fix, better saw.

Always check the classifieds like Craigslist for jig saws. There are some very decent ones on there for $50-ish, just keep your eyes open.
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post #9 of 19 (permalink) Old 06-05-2019, 12:17 PM
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I have an 18v DeWalt. Has a guide and only use Bosch blades, and the shortest blade that will do the job. Does a good job on straight and curved cuts, although I always sand the curves in particular. I also don't push the cut fast. Not having to monkey with a cord is a real plus. Can't quite justify a Bosch at this point, but if the DeWalt dies before I do, I'll probably stretch the budget for a Bosch.

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post #10 of 19 (permalink) Old 06-05-2019, 12:55 PM
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Coping saw solves the problem. Sounds like the blade is flexing. I h ave an ancient CM jigsaw that was my late father-in-law's. Metal case tells you how old it is. Never had a real problem with cutting even thick stuff. I use it for rough cutting and use a sanding drum for the finish work. The goal/hamper is an example. Cut with the jigsaw and used a drum sander on the drill press to go up to the line.
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