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post #1 of 13 (permalink) Old 12-23-2011, 02:33 PM Thread Starter
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Default Right tool for the job?

Have a laminated disk 9" in diameter 2.5" thick with a 1/4" thick laminate on one face I would like to cut into 8 equal 'pie shaped' parts. I do not want to drill a center hole in it to preserve the pointed ends and am wondering what tool to use, table saw, bandsaw or radial arm saw, I would use the miter saw but it maxes out at 5.25" cuts at 90 deg. Idealy I would like to use a fine tooth blade to provide a smooth finish and minimise finishing the parts, seems like the RAS or table saw would bind due to the thickness of the material if I put in a plywood blade. Band saw seems to be ideal but I would have to travel some distance to use a friends and hate to bother them on a holiday weekend but I have to get this done in time for Christmas.

Suggestions welcome, perhaps some sort of jig or fixture in a octagon shape to guide along a fence?

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post #2 of 13 (permalink) Old 12-23-2011, 03:30 PM
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Bandsaw would be my first suggestion

Double stick tape it to a sacrificial piece with a straight edge to give you a guide for a straight cut on the table saw.

After you have a half circle, your miter saw should work

You have that beast of a scrollsaw for your avatar, a #9 blade and a lot of patience could give you good results, with a little sanding to dress the edges if you aren't perfectly straight

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post #3 of 13 (permalink) Old 12-23-2011, 03:43 PM
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Kristin, for this project I would use my table saw with a sled. You know the cut will be exactly where the edge of the sled is. Measure the thickness of your saw blade.(Mine is 1/8") Buy a roll of automotive pin stripe tape the same width as your blade and use it to mark your layout on the piece. This way you know exactly where the cut will go with no math.

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post #4 of 13 (permalink) Old 12-23-2011, 03:48 PM
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Hi Kristin

Your RAS should will do the job fine ,you don't need to cut the full depth in one pass .two or 3 will do just fine..I would stick/pin nail it down to some 1/4"/? thick plywood for the RAS saw job
Just like cutting a pie but not the crust.(plywood) one side of a pentagon for the plywood base plate..cut it and then turn it and make the others cuts..

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Originally Posted by Kristin D View Post
Have a laminated disk 9" in diameter 2.5" thick with a 1/4" thick laminate on one face I would like to cut into 8 equal 'pie shaped' parts. I do not want to drill a center hole in it to preserve the pointed ends and am wondering what tool to use, table saw, bandsaw or radial arm saw, I would use the miter saw but it maxes out at 5.25" cuts at 90 deg. Idealy I would like to use a fine tooth blade to provide a smooth finish and minimise finishing the parts, seems like the RAS or table saw would bind due to the thickness of the material if I put in a plywood blade. Band saw seems to be ideal but I would have to travel some distance to use a friends and hate to bother them on a holiday weekend but I have to get this done in time for Christmas.

Suggestions welcome, perhaps some sort of jig or fixture in a octagon shape to guide along a fence?

Kristin



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Last edited by bobj3; 12-29-2011 at 11:11 AM.
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post #5 of 13 (permalink) Old 12-23-2011, 11:35 PM
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The plywood blades I am familiar with only allow about 1" depth of cut. I warped one trying to cut deeper and making multiple cuts wouldn't have helped because the blade was thicker 1" in from the edge.
I don't think you can use your miter saw as my calculations come up with about 6 3/8 at 45 deg.

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post #6 of 13 (permalink) Old 12-23-2011, 11:57 PM
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http://www.amazon.com/Milwaukee-48-4...702339&sr=1-38

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The plywood blades I am familiar with only allow about 1" depth of cut. I warped one trying to cut deeper and making multiple cuts wouldn't have helped because the blade was thicker 1" in from the edge.
I don't think you can use your miter saw as my calculations come up with about 6 3/8 at 45 deg.



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post #7 of 13 (permalink) Old 12-24-2011, 05:44 AM Thread Starter
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Excellent idea for a fixture but I am thinking with the 1/8" kerf now the parts will not fit together properly, perhaps I will have to add a 1/16" lamanate to the sides to correct this.
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post #8 of 13 (permalink) Old 12-24-2011, 09:48 AM
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Hi Kristin

Thanks

I don't think you will need to shim up the sides, because you are cutting all the way across the cir., just like cutting a 45 deg. cut on a board or to say cutting it into two parts, the parts will fit back into place just smaller..(shorter)

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Originally Posted by Kristin D View Post
Excellent idea for a fixture but I am thinking with the 1/8" kerf now the parts will not fit together properly, perhaps I will have to add a 1/16" lamanate to the sides to correct this.



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post #9 of 13 (permalink) Old 12-26-2011, 09:37 AM
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I've put a lot of thought into your problem Kristin and I reckon that a sharp knife will solve your "problem"!

Harry



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post #10 of 13 (permalink) Old 12-26-2011, 12:26 PM
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Hi Harry

" I reckon that a sharp knife will solve your "problem"! " == ????

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I've put a lot of thought into your problem Kristin and I reckon that a sharp knife will solve your "problem"!



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