Flush Trim Cutter with Down Shear - Bottom Bearing - Router Forums
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post #1 of 15 (permalink) Old 05-02-2017, 02:37 PM Thread Starter
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Default Flush Trim Cutter with Down Shear - Bottom Bearing

Hi

Is a Flush Trim Cutter with Down Shear and Bottom Bearing suitable for profile routing on a router table?

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John
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post #2 of 15 (permalink) Old 05-02-2017, 03:43 PM
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That will work!

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post #4 of 15 (permalink) Old 05-02-2017, 06:12 PM
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I'd use a straight solid carbide, not twisted. It might pull the sample off your template.
A straight has no shear vectors.
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post #5 of 15 (permalink) Old 05-03-2017, 01:54 AM Thread Starter
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I'd use a straight solid carbide, not twisted. It might pull the sample off your template.
A straight has no shear vectors.
I had never thought of straight vs twisted. Do you know where can I find more information on the comparisons?

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post #6 of 15 (permalink) Old 05-03-2017, 06:05 AM
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A straight, two flute carbide bit has two cutting edges running parallel (or really close to parallel) to tlhe body of the bit.

Spiral bits are machined like a drill bit, with the flutes wrapped around the bit. They can be upspiral or downspiral, depending if they pull stock up to the collet or push it away from the collet

http://www.woodmagazine.com/woodwork...ing/spiral-bit

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post #7 of 15 (permalink) Old 05-03-2017, 12:12 PM
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John if the bit is listed as a down-cut bit it will try to lift the part off the table because it is designed to push chips away from the collet. If you do use a down-cut bit it would be best to use feather boards to hold the part down for safety.

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I am a bit confused now, what is best and of the safest for use on a router table for profiling?

Regards

John
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post #9 of 15 (permalink) Old 05-03-2017, 03:47 PM Thread Starter
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Quote:
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John if the bit is listed as a down-cut bit it will try to lift the part off the table because it is designed to push chips away from the collet. If you do use a down-cut bit it would be best to use feather boards to hold the part down for safety.
This is the bit

Axcaliber Flush Trim Cutter with Down Shear - Bottom Bearing - Trimming - Router Cutters - Routing - Power Tool Accessories - Accessories | Axminster Tools & Machinery

Is it a spiral bit?

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post #10 of 15 (permalink) Old 05-03-2017, 04:17 PM
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John that is a down shear bit but it is not a spiral bit. It will try to push the part up from the table, remember the router is upside down in the table. The more material you try to take at one time the more pressure will be generated. If you make lite passes and use good push blocks you should be okay, just don't try to over feed the bit or it might cause enough rise you might have problems.

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