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Old 05-28-2018, 09:27 AM   #1 (permalink)
 
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Default Best way to cut a diagonal along length of blank?

I have run into an instance where I would like to cut a 45 degree diagonal along the full length of the blank. Does anyone know of an efficient/effective way to do this ?

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Old 05-28-2018, 09:46 AM   #2 (permalink)
 
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This may work for you. It is a jig I made to cut a diagonal on a round safely with a bandsaw I think the pics are self explanatory. The double sided tape holds the blank from rolling while being cut. This jig will also work on a square blank. Adjust the angle of the strips to suit your angle. I hope this works for what you are wanting to accomplish.
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55da2186-4127-49e4-8fe0-480de26d8551.jpg   3799f11b-fa19-4dfe-b747-029dff770092.jpg   6372aa01-1f65-42c5-958a-3cab6b41328d.jpg   e5f7601d-ab58-480c-ae40-1b0f4917a2a6.jpg  
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Old 05-28-2018, 10:00 AM   #3 (permalink)
 
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I assume you want to cut a 45 the length of a pen blank(5" or so) in a 3/4" or 1" blank. You can not do it. It will not equal a 45 because you do not have enough material. You can cut the blank in half (corner to corner) What tools do you have?? Can do it on either bandsaw or tablesaw. The kerf on tablesaw is greater so more material lost if that means anything but it would be a cleaner cut. Need a sled Many different ways to make sleds. Use miter slots, use miter gauge, or use fence, Not sure how easy this is to explain but cut a kerf in the sled (whatever method you choose.) Place doublesided tape over the slit. Now lay the blank corner to corner on the center of the kerf. If I am understanding what you want to do.

In my photo this is a jig for cutting 45 degrees in a pen blank. It can be easily used for doing what I think you want to do. As I said lay doublesided tape over kerf and lay the blank corner to corner on center of kerf. Make sure there is tape under the entire blank to keep it secured. Not much room for clamps so I would hold the blank down with a push stick. This can be adapted for a bandsaw as well. Or just freehand it on a scrollsaw or bandsaw. Again if I am not understanding then this is all moot
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Old 05-28-2018, 10:28 AM   #4 (permalink)
 
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Quote:
Originally Posted by jttheclockman View Post
I assume you want to cut a 45 the length of a pen blank(5" or so) in a 3/4" or 1" blank. You can not do it. It will not equal a 45 because you do not have enough material. You can cut the blank in half (corner to corner) What tools do you have?? Can do it on either bandsaw or tablesaw. The kerf on tablesaw is greater so more material lost if that means anything but it would be a cleaner cut. Need a sled Many different ways to make sleds. Use miter slots, use miter gauge, or use fence, Not sure how easy this is to explain but cut a kerf in the sled (whatever method you choose.) Place doublesided tape over the slit. Now lay the blank corner to corner on the center of the kerf. If I am understanding what you want to do.

In my photo this is a jig for cutting 45 degrees in a pen blank. It can be easily used for doing what I think you want to do. As I said lay doublesided tape over kerf and lay the blank corner to corner on center of kerf. Make sure there is tape under the entire blank to keep it secured. Not much room for clamps so I would hold the blank down with a push stick. This can be adapted for a bandsaw as well. Or just freehand it on a scrollsaw or bandsaw. Again if I am not understanding then this is all moot
Nice jig John!
I think we both are not sure as to what George is trying to accomplish without some pics. A 45 degree cut lengthwise a square blank becomes a straight cut when turned round.
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Old 05-28-2018, 11:12 AM   #5 (permalink)
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From what I am reading, you basically want a miter cut the length of the blank. This would be better on a bandsaw as it has a thinner kerf. It can be done with a thin kerf circular saw blade too, except the circular blades do have a thicker kerf.

There have been several posts here over the years with a jig for running the length of the blank.

You need a sled to slide with the kerf; then put two boards on each side of the kerf. These two boards need to be edged with the 45į angle; The two boards together will look like a "V" with the kerf (blade) running the length between the middle of the V.

Add the blank into the "V" (use clamps) and slide the sled into the blade.
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Old 05-28-2018, 11:34 AM   #6 (permalink)
 
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Sorry for the ambiguity in the post. I have attached a drawing of the cuts I believe I need to make in order to create the pattern Iím looking for. I think I have been given some good hints ... Iím thinking I need to create a special sled for the corner-to-corner cuts.

img_0081.jpg


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Old 05-28-2018, 11:39 AM   #7 (permalink)
 
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It looks like you're attempting a radial segment.
Make a V-sled and cut it on the table saw.



Edit: Similar to this drawing.

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Old 05-28-2018, 12:30 PM   #8 (permalink)
 
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Perfect! Thanks! G


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Old 05-28-2018, 01:11 PM   #9 (permalink)
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Thanks John for the VISUAL. That is what I was trying to describe! That will do it!
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Old 05-28-2018, 01:44 PM   #10 (permalink)
 
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Are you also planning on cuts through the other lines on the blank's end? As in dividing the blank into 8 pieces?
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