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Post by GhostFist on Jul 28, 2015 17:18:10 GMT -5
I am not sure how much clearance there is - I will have to see if I can measure it next time I am in the shop - but since Mafell makes 237mm my guess is that they do not allow for a bigger blade to account for any tolerance issues and to clear the sawdust and chips effectively. Maybe timber outside of NA is sized so that this machine adequately cuts the equivalent of 4x material. Australian Vernacular: 1) In Australia the smallest unit of measure is referred to as a "bee's dick" (hereafter referred to as a "BD" for "Apis Correctness" hereafter referred to as being 'AC'). 2) Ergo means "Therefore". Ergo... The radius difference between 237 and 238 is 1/2-mm, which is about a "BD" difference. In Canada, the smallest unit of measurement would be a blonde "CH" |
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Post by holmz on Jul 29, 2015 1:56:23 GMT -5
@red
What do they use in the military?
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Post by rizzoa13 on Jul 29, 2015 4:40:19 GMT -5
Same here Ghostfist a blond CH is a nearly translucent sliver of wood. A red CH on the other hand may be a piece up to an inch thick and gnarly  . Time for the big saw at that point. |
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Post by GhostFist on Jul 29, 2015 5:32:07 GMT -5
Ya to convert Australian "BD's". I'm assuming 1 "BD"= 8 blonde "CH's"
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Post by holmz on Jul 29, 2015 6:08:33 GMT -5
Probably something like with the exchange rate and the VAT/GST.
In any case what this means is that the 238-mm saw blade is ~8 BCH bigger than the 237-mm saw.
Which is 8 translucent slivers.
Just as the are 3 tsp/tbls that is a big piece of saw dust (or a chip).
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Post by huntsgemein on Aug 28, 2015 19:13:49 GMT -5
Can't really help you fellows with your 237/238mm blades, but my old Elu saw (MH85) takes 240/30/2.8mm Z18 blades. They're still available from fleabay.de at about Euro 20 ea. + postage. www.ebay.de/itm/HM-Kreissageblatt-von-Elu-240-x-2-8-x-30-mm-Z-18-W-/200703752907?hash=item2ebae03acbI've used them extensively for ripping dried hardwood studs (4" x 1 1/2")with the Elu saw both ways: i.e. 4" double-cut and 1 1/2" single. Excellent performance. In addition, Festo/Narex/Protool have had 240mm saws available in their lineup for the past 20 odd years (which may now latterly have been discontinued) and still list blades as available in 22. 48 & 80t configurations. These are however of course unconscionably expensive. There was also a "Panther" blade (18t rip) available which I have used in the past to great effect. They don't seem to be available any more. If it fits (requiring 1.5mm clearance) then the Elu blades would be a readily available and inexpensive quality alternative to the original. I estimate the clearance to be about 3 Blonde CH's, or 2 Bees' D's or as we say in the south island of Australia about 6 Gnat's Whiskers. |
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Post by holmz on Aug 28, 2015 20:54:05 GMT -5
... I estimate the clearance to be about 3 Blonde CH's, or 2 Bees' D's or as we say in the south island of Australia about 6 Gnat's Whiskers. Noice, both imperial and metric. |
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Post by GhostFist on Aug 29, 2015 10:59:01 GMT -5
Gnats whiskers? Now we're getting serious
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Post by MrToolJunkie on Aug 29, 2015 12:23:55 GMT -5
LOL...serious indeed!
But hear is the thing - if Mafell intended for a deeper cut, then why make a blade that is 237mm? Why not 240mm or something? There has to be some engineering reason for it...maybe to just ensure a proprietary blade? The blades that they sell work great and are high quality, but having some more options would be great.
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Post by huntsgemein on Aug 29, 2015 23:53:24 GMT -5
Metric only: the official Tasmanian Registrar of Weights & Measures divides fractional Imperial measures into Poofteenths.
Regarding the "weird" blade size of 237.... because they can I suppose. Makes it a bit harder to source non OEM alternatives. Has anybody actually measured said diameter accurately? I honestly wouldn't be surprised if it was really 240mm anyway, given the somewhat limited number of Continental blade manufacturers.
Sometimes they fit, sometimes they don't. My Metabo plunge/pendulum saw (nominally 160mm) takes 150mm diamond discs & 165mm blades, but not 170mm. My Metabo contractor's saw (254mm) will fit a 260mm crosscut blade from a Kapex. My DeWalt Radial Arm (254mm) will only fit a 260mm blade with the riving knife removed. No great problem as I regard it as way too dangerous to be used for ripping anyway!
I'd suggest the main possible problem would be clearance to the riving knife. In some saws its position is adjustable, but as its a "Flipkiel" maybe it isn't possible. Maybe somebody can actually remove the pendulum cover and check the riving knife clearance. Anything >2mm & Robert's your father's brother!
While obviously not the equal of Mafell's original 12 tooth blade, the geometry of the Elu blades, with a low tooth count, aggressive hook of about 20 degrees, super deep gullets for clearance and alternate top bevel tips makes it a dedicated rip blade too. As previously mentioned, it also performs extremely well in (Eucalyptus and Acacia) hardwoods. Little heat generation, moderate feed rates at depth, accurate tracking and minimal flex.
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Post by lincoln on Aug 30, 2015 4:40:05 GMT -5
Metric only: the official Tasmanian Registrar of Weights & Measures divides fractional Imperial measures into Poofteenths. Regarding the "weird" blade size of 237.... because they can I suppose. Makes it a bit harder to source non OEM alternatives. Has anybody actually measured said diameter accurately? I honestly wouldn't be surprised if it was really 240mm anyway, given the somewhat limited number of Continental blade manufacturers. Sometimes they fit, sometimes they don't. My Metabo plunge/pendulum saw (nominally 160mm) takes 150mm diamond discs & 165mm blades, but not 170mm. My Metabo contractor's saw (254mm) will fit a 260mm crosscut blade from a Kapex. My DeWalt Radial Arm (254mm) will only fit a 260mm blade with the riving knife removed. No great problem as I regard it as way too dangerous to be used for ripping anyway! I'd suggest the main possible problem would be clearance to the riving knife. In some saws its position is adjustable, but as its a "Flipkiel" maybe it isn't possible. Maybe somebody can actually remove the pendulum cover and check the riving knife clearance. Anything >2mm & Robert's your father's brother! While obviously not the equal of Mafell's original 12 tooth blade, the geometry of the Elu blades, with a low tooth count, aggressive hook of about 20 degrees, super deep gullets for clearance and alternate top bevel tips makes it a dedicated rip blade too. As previously mentioned, it also performs extremely well in (Eucalyptus and Acacia) hardwoods. Little heat generation, moderate feed rates at depth, accurate tracking and minimal flex. A fellow Tasmanian?! |
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Post by huntsgemein on Aug 31, 2015 22:58:38 GMT -5
I surely am!
Plus given the popular perception of Taswegian mating habits we're probably related too!
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. Time for the big saw at that point.