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Thread: Jigsaw blades
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1st October 2017, 04:52 PM #1Intermediate Member
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Jigsaw blades
I have a Makita Jigsaw and using Bosch blades cutting hardwood about 30 to 50mm thick and the blades are blunting it seems very quickly.
Is the wood to thick or do I need better blades ?
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1st October 2017, 04:56 PM #2
Are the blades designed for hardwood? When you say "quickly", after roughly how many metres do they go blunt?
Bosch blades are excellent quality, and are usually Swiss made.
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1st October 2017, 05:11 PM #3Intermediate Member
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The packet number is T144D Fast cut speed for wood and says 5 to 50 mm. I have cut out around 20 small spoons and its hardly cutting now. Ive been cutting Blackwood, mountain ash, teak, wattle.
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1st October 2017, 05:43 PM #4
Without researching that particular blade, it may be a blade more designed for straight cuts rather than curves (which you would surely have with spoons). This is usually determined by the distance between the teeth points and the back of the blade. A larger distance has more friction going through a curve. I'll see what I can learn from my own set of Bosch blades, and report back.
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1st October 2017, 05:56 PM #5Intermediate Member
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Was also using the scrolling type of blade Bosch T101AOF which says clean cut for hardwood but only to 15mm. Does the curves better but very slow.
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1st October 2017, 06:00 PM #6
Ok, they are indeed for straight line cutting. Have a look at the middle icon under the word "speed" on the packet and you can see the blade cutting straight lines. What you need is something like a T308BOF BIM (BiMetal) "extra-clean for hardwood".
If this link works correctly you can see the second from left icon showing the blade cutting a circle. They are a slightly longer blade, but still for 5-50mm thickness.
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1st October 2017, 06:01 PM #7
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1st October 2017, 06:05 PM #8GOLD MEMBER
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I think you'll find the problem, is that the blades are designed for straight cut, not curved.
On this page, which lists all the blades recommended for cutting wood; https://www.boschtools.com/us/en/bos...-wood-22547-c/
I found this recommendation.
T244D Speed for Wood 5-6 Progressive Teeth Per Inch 4 Hard/soft woods, OSB, plywood 1/4"- 2-3/8" Scroll blade for curved and fast cuts
Found this on Google; https://www.boschtools.com/us/en/bos...4d100-29815-p/
Copied from that page
"Designed for straight and very fast cuts in wood, OSB and plywood 1/4 In. to 2-3/8 In. thick
6 TPI tooth profile and high carbon steel blade body for exceptionally fast cutting and long life in wood
4 In. overall length, 3 In. usable length
100 piece pack offers maximum value"
Hope this helps,
KrynTo grow old is mandatory, growing up is optional.
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1st October 2017, 06:13 PM #9
Teeth point to back of blades measurements (roughly):
344 is about 9.5mm, and I assume a 144 is the same but for shallower cuts. They have very aggressive teeth, hence why the straight line cutting icon shows splintering as well.
T101AO is just under 5mm and much finer teeth which is why they are slow
T308BOF just over 7mm and with one fine tooth and one coarser tooth.
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1st October 2017, 06:16 PM #10
I'll bet if you examine the 144 teeth points that you'll find they are burnt, or at least blunt.
Kryn, doncha just hate that when you say the same thing but it takes longer to type, because of adding links?
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1st October 2017, 06:26 PM #11GOLD MEMBER
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You're not wrong there, it took me about 15 minutes to do that short speel, by the time I found what was looking for, copy paste etc, but it's a good way of getting the correct information. Can't have someone say that it's WRONG info then.
KrynTo grow old is mandatory, growing up is optional.
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1st October 2017, 07:56 PM #12Visit www.inthewoodshop.com for tutorials on constructing handtools, handtool reviews, and my trials and tribulations with furniture builds.
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1st October 2017, 08:51 PM #13
Tony ray
I have to say that I find the jigsaw a tool that struggles with the harder timbers particularly as the timber gets thicker. Now while you can say this is true of almost any power tool, it seems to be particularly so of the jigsaw. There are very sophisticated (and expensive) jigsaws, which do perform better I'm reliably informed, but not the run of the mill offerings from Bosch, Makita, Metabo et al. The cheapies are probably unworthy of comment.
Tight curves or turns require a very narrow blade and wide blades are suited to straight cutting or only the very gentle curves. A bandsaw (with a narrow blade) is a better tool for what you are doing particularly if you are doing small production runs.
I rough cut handles from some of the harder hardwoods for handsaws using a jigsaw. It is really tough going in material only 24/23mm thick. I use a jig saw because I need to cut the handle hole and a bandsaw can't do that.
I have just re-read your post and 30-50mm is a big ask for a jigsaw. 50mm in Pine, but 5mm in Wattle .
Regards
PaulBushmiller;
"Power tends to corrupt. Absolute power corrupts, absolutely!"
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1st October 2017, 09:26 PM #14
The makita
Jigsaw I own has oscillating function on it.
I've meet two other owners of same saw who had know idea it was there.
A little lever towards the front right side.
Which moves to three indents.
Makes a big difference in cutting quality
Cheers Matt
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2nd October 2017, 07:18 AM #15Intermediate Member
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Thanks for the responses guys, lots of help.
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