Pattern cutting bits - Router Forums
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post #1 of 6 (permalink) Old 01-07-2017, 01:41 PM Thread Starter
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Default Pattern cutting bits

So i am doing more and more pattern cutting lately. Tools are OF 1400 with a 1/4" Spiral up cut and template bushing. 3 passes on 3/4" AC Sandaply. 2 passes on 1/2" AC Sandaply My question is what is the better setup? The one i have now or the one below or something totally different.


Larger diameter spiral up cut would allow me what i feel a deeper cut 2 passes on 3/4" with little or no damage to the bit. Chip load is greater I do have it hooked to a dust collections system?

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post #2 of 6 (permalink) Old 01-07-2017, 05:23 PM
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Spiral cutters are not silver bullets.
I'd use standard straight brazed-on steel, (carbide flutes).
Use a cutter = or> 5/8" diameter; there's not much waste in to the shanks of tools of 5/8" or more. They're stiffer.
And I'd take no more than an 1/8th/pass.
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post #3 of 6 (permalink) Old 01-07-2017, 05:33 PM
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Routers are a poor tool for removing waste but a great tool for finish work. Most of us recommend either drilling out as much waste as possible or band sawing or jig sawing close and then use the router for the finish cut. That is much easier on your router and your bits. Blades and drill bits as a rule get way more mileage than a router bit will.
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post #4 of 6 (permalink) Old 01-08-2017, 08:14 AM
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Band saw waste. If you are using template guides, I like using a parallel drawing disk which quickly give you a line to bandsaw to. I like to use 1/2" compression bits, sprial up and down.
good luck
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post #5 of 6 (permalink) Old 01-14-2017, 06:55 PM Thread Starter
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Thanks guys

I have purchased a new 1/2 spiral up cut and a standard straight. I have the Paulk work bench to cut out tomorrow. I think i will put both of them to the test. I appreciate the input

Anthony

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post #6 of 6 (permalink) Old 01-15-2017, 01:54 AM
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Anthony regarding the question about which is better a top bearing pattern bit or a bottom bearing flush trim bit the answer depends on what you are doing. In some cases one will work and the other won't and in some cases it doesn't matter which one. If you can clamp a template to either side of a form for example, it doesn't matter because if you mount it under you can use a flush trim and it you clamp it on top of your work you can use a pattern bit. Let's say that you can't rout deep enough while following the template. You can remove the template and a top bearing pattern bit will follow the profile that you have already completed so that you can go down the thickness of the template on the second pass. Are you starting to see the differences in the methods yet?

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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