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Thread: Saw Blade Adapter
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12th June 2018, 04:14 PM #121 with 26 years experience
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Saw Blade Adapter
Is there an adaptor or fitting that will allow you to fit a saw blade directly on to the keyed output shaft of an electric motor?
Cheers
Fonix
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12th June 2018 04:14 PM # ADSGoogle Adsense Advertisement
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12th June 2018, 05:17 PM #2.
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I've never seen one and why would you want to do that? - the motor will seriously get in the way of the blade and reduce the cutting depth.
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12th June 2018, 08:58 PM #321 with 26 years experience
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Yep it would reduce cutting depth, so you'd need to go a bigger blade.
I thought the higher end saws had the blade mounted directly on to the motor?
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12th June 2018, 09:03 PM #4.
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12th June 2018, 09:17 PM #5Taking a break
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12th June 2018, 11:20 PM #6Senior Member
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Sounds almost like a radial arm saw, the inner blade flange fits onto a keyed motor shaft. But they at least have a flat bottomed motor for clearance.
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13th June 2018, 05:40 PM #721 with 26 years experience
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So is there a chart that suggests blade size for each engine.
My brother wants to build a basic saw bench, he has some idea of cutting small sleepers in to bricks - and yeah there's ten tools that'd do the job better and as a tradie he probably has all of them, but he wants to go in this direction.
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13th June 2018, 05:55 PM #8.
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What's a small sleeper?
Standard real sleepers come in 200, 250 and 300 x 125 , 150 mm
There's lots of other things that hardware stores call sleepers but they are just thick boards.
What sort of timber? A rough guide for Aussie hardwood if you don'y want to be standing there all day is about 1HP per inch of depth of cut.
So blade has to have a radius of 5" Plus has half the diameter of the motor. If will be a big motor so maybe 8" across, 4" diameter so 9" radius blade so 18" blade and you'll need about 9HP motor. Thats a 3Phase motor on a 32A line. Cost wise it adds up fairly quickly
What abut a small chainsaw?
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13th June 2018, 06:06 PM #9SENIOR MEMBER
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13th June 2018, 06:44 PM #10.
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It's not cutting just 5", its cutting a up to 10" long curve that still has to be cut by the outer edge of the 18" blade.
Taken to an extreme. A 30" blade on a 5HP motor will be slowed down a lot easier than a 18" blade because the constant torque of the motor delivers less force over the longer radius.
The docking saws I have seen at saw mills to dock sleepers have typically been about 10HP. Less can be used but it will take a lot longer.
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13th June 2018, 07:25 PM #11SENIOR MEMBER
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In other words, the rule of 1HP per inch of depth of cut isn’t quite correct then?
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13th June 2018, 08:43 PM #12.
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14th June 2018, 06:52 PM #13Senior Member
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15th June 2018, 10:23 AM #14.
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Some did but most didn't.
The following were taken at a mill in British Columbia.
This is a small diameter log docking saw, it has an ~12" depth of cut and uses a 17HP motor.
CirS.jpg
The logs being processed were no larger than about 10" in diameter usually from land clearing
The logs were debarked, planed square and cut into up to 4, 4x4" cross section pieces of wood were extracted from them. in a one pass operation.
Debarker.
debarker.jpg
Two 30HP powered double sided planers, one did the top and bottom, and the one below did the sides
motors.jpg
Then a pair of bandsaws ripped teh logs to size.
Nearly all this timber was shipped to china.
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16th June 2018, 04:34 AM #15
sounds like your brother wants one of these
Mafell MKS 185Ec Circular Saw -- 185 mm depth of cut at 90 degrees.
or a Makita 5402 16-5/16" circular saw.
in terms of a chart depth of cut vs size of saw, have a look at page 20 of this catalog https://www.timberwolftools.com/docu...y-Machines.pdfregards from Alberta, Canada
ian
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