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Old 02-11-2012, 05:22 AM   #31
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Left blade circular saws


You gentlemen can argue symantics all you want. There is a reason that the top of the workpiece is what splinters while making the cut and that is because all the energy of the spinning blade is coming from bottom toward the top as the teeth rake out material from the kerf.

For the sake of argument, suppose the workpiece has parallel bevels of 45 degrees with the long point of the bevel on the bottom at the point of blade entry. Now the cut starts and finishes from bottom to top.

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Old 02-11-2012, 08:34 AM   #32
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Quote:
Originally Posted by loneframer
because all the energy of the spinning blade is coming from bottom toward the top as the teeth rake out material from the kerf.
I don't think anybody disagrees with this. Its just that at any given point, the removed material gets raked out from top down.

It's like digging a hole in the ground with a shovel. The dirt is removed from the top, not up through the bottom.
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Old 02-11-2012, 03:56 PM   #33
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Left blade circular saws


thank you riz.. finally another chippy getting in on this. next thing you know their gonna tell us how to buy nail guns riz

as for the actual topic,, porter cable used to but i dont know if they still are since black and decker has downgraded pc to home owner grade tools, milwaukee does, makita used to not sure if they still do, the bosch is the weakest model they make

and of course wormdrive/hypoids... i personally have the milwaukee right hand and a makita hypoid
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Old 02-11-2012, 09:23 PM   #34
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Left blade circular saws


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Originally Posted by woodworkbykirk
thank you riz.. finally another chippy getting in on this. next thing you know their gonna tell us how to buy nail guns riz
Don't get offended woodworkbykirk. I'm not telling you how to do anything. I'm simply describing the cutting action of a circular saw.
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Old 02-11-2012, 09:49 PM   #35
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Left blade circular saws


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Originally Posted by jlmran View Post
I don't think anybody disagrees with this. Its just that at any given point, the removed material gets raked out from top down.

It's like digging a hole in the ground with a shovel. The dirt is removed from the top, not up through the bottom.
Actually, the dirt is removed by getting under the dirt and lifting it up in measured quantities, very similar to how a saw blade works.

You are correct in that the kerf appears at the top of a vertical line first, but the kerf is formed by the upward and forward motion of the blade.

A blade with fewer teeth may only have one tooth in contact with the material at any given point, for example, an 18 tooth framing blade set at full depth, cutting through a piece of 3/4" stock. That tooth begins raking material at the bottom of the kerf, moving it forward and upward.

A blade with more teeth actually has more teeth in contact with the work at any given time, however a tooth that is at the very top of the kerf is of no effect on the kerf. The teeth below the top of the kerf are grabbing the material and moving it upward.
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Old 02-12-2012, 05:52 PM   #36
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Left blade circular saws


Quote:
Originally Posted by loneframer
Actually, the dirt is removed by getting under the dirt and lifting it up in measured quantities, very similar to how a saw blade works.

You are correct in that the kerf appears at the top of a vertical line first, but the kerf is formed by the upward and forward motion of the blade.

A blade with fewer teeth may only have one tooth in contact with the material at any given point, for example, an 18 tooth framing blade set at full depth, cutting through a piece of 3/4" stock. That tooth begins raking material at the bottom of the kerf, moving it forward and upward.

A blade with more teeth actually has more teeth in contact with the work at any given time, however a tooth that is at the very top of the kerf is of no effect on the kerf. The teeth below the top of the kerf are grabbing the material and moving it upward.
Exactly. Each of your points above agree with the points I submitted.

The one possible exception could be the example of an 18-tooth blade at full depth cutting thinner (3/4") material. I stated that any given tooth will contact the highest available material in its path. In this scenario, the bottom of the material IS the highest available material in its path. Anything vertically above the bottom is not immediately available for cutting because of the coarseness (tooth count) of the blade, coupled with the full depth setting of the saw.

I hope woodworkbykirk agrees.
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Old 02-13-2012, 02:47 AM   #37
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Originally Posted by jlmran View Post
the leading edge of the cut travels downward
I catch the meaning but I would phrase it to say that the top side of the cut precedes the bottom side anywhere on the cut line.

And yes there is no question that the material is being removed in an upward direction.
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Old 02-25-2012, 04:41 PM   #38
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Getting way off topic.

Last edited by Ed911; 02-25-2012 at 04:57 PM.
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Old 02-28-2012, 10:32 PM   #39
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Left blade circular saws


So... anyone have a left blade circ saw? What do you think?
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Old 02-28-2012, 10:59 PM   #40
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Left blade circular saws


I think this cutting direction thing deserves a mythbusters episode. Anyone want to make a submission?

While we're at it, let's just make up a myth that if you cut C4 with a skill saw, it can explode due to the friction heat of the blade.

As for the original topic.... I'm sorry I can't help, The only left blade saws I've seen are cordless, so you could go with a cordless one if you want. Though personally I prefer plug in. Gives me that sithlord feeling of unlimited power.
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Old 02-29-2012, 03:10 AM   #41
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I think this cutting direction thing deserves a mythbusters episode. Anyone want to make a submission?

While we're at it, let's just make up a myth that if you cut C4 with a skill saw, it can explode due to the friction heat of the blade.

As for the original topic.... I'm sorry I can't help, The only left blade saws I've seen are cordless, so you could go with a cordless one if you want. Though personally I prefer plug in. Gives me that sithlord feeling of unlimited power.
The worm drive corded saws all mount the blade on the left! Same for Makita's Hypoid saw.
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Old 02-29-2012, 03:26 AM   #42
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Left blade circular saws


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Originally Posted by Total Tool
Who makes a quality left blade circular saw? I know Bosch and Milwaukee each make one. I think porter cable does too. Other than that, I dont really know of anything.

Anyone have any recommendations? Why dont more companies offer saws with blades on the left side of the motor?
I have a skil hd5510 5 1/2 inch circ w/ blade on left! Nice saw but saw blades hard to come by and you are limited by small blade! Great lightweight saw though!
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Old 02-29-2012, 11:34 PM   #43
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Left blade circular saws


So...my table saw cuts from the bottom up, top first. got it!

...and it's left handed.
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Old 03-01-2012, 06:34 AM   #44
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So... anyone have a left blade circ saw? What do you think?
i have three left hand saws (i think they have all been mentioned.)

Makita 7 1/4" worm drive for general construction/rough cuts/framing

Porter cable 6" for fine/finish work

Ryobi 18v cordless 5 1/2" (honestly not sure why i have this one...)

Also, I think the debate over sidewinder vs. worm drive saw would more appropriate here than which direction the saw cuts..

As far as I can tell, it's mostly and East coast/West coast thing...
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Old 03-01-2012, 06:49 AM   #45
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So...my table saw cuts from the bottom up, top first. got it!

...and it's left handed.
Fail...

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