4-Flute Alternating Shear Carbide-Tipped Pattern & Flush Trim Bits from Ultra-Shear

jeffinsgf

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As a copywriter, I throw around words like "innovative" and "new" all too frequently...it's my job. So, when something is really different, it can be a challenge to get an audience's attention. I've tested and used a lot of router bits, particularly in the last couple years. The ones launching tomorrow are unlike anything I've ever used. They're 1-1/8" diameter pattern and flush trim bits (bearings both above and below) that are carbide tipped, with the carbide brazed at a shear angle, each successive blade reversing from up-cut to down-cut. So, unlike a compression bit where half the edge is being cut in each direction, the entire edge is being cut in opposing directions with each blade engagement. It gives the cleanest cuts I've ever made against the grain. I have this crazy batch of quilted maple that just won't behave with any router bit. It always tears out. These bits cut it like it was balsa and left a surface that I wouldn't touch with anything coarser than 150 grit sandpaper. It's the ellipse pattern in the product photos. Then we took some pics of a chair leg in white oak, two edges of which are going wickedly against the grain. No problem. Not a single chip.

Now, we make some pretty sophisticated solid carbide bits that make some very, very nice cuts. But there's a price to be paid for that performance.

These Alternating Shear bits sell for about half the price of a comparable solid carbide bit, and my personal opinion is the cut is superior. Longevity? That's about the only remaining question, but there's nothing to suggest it will be disappointing.

The page is live but the email isn't going out until Tuesday morning. I thought I would give you guys a "heads up" to actually open the email this time. It's worth it. Or, just go to the page: https://www.woodpeck.com/ultra-shea...-pattern-flush-trim-bit-4-flute-12-shank.html
 
If you could try them on melamine parts I’d appreciate it.

This may be the answer to no pre-mill on my 26 year old edge bander. We don’t do many melamine panels but when we do, even cutting them on the CNC using compression bits we experience chipping.

I designed a premill for the bander but having the heads made or purchasing existing made its cost not worth it.

No, I’m not going to spend 60K on a new edge bander.

If your bits work I’ll design a premill station around the bits.

Thank you,
Tom
 
Tom,

Some results for you on melamine with the 4-Flute Alternating Shears. To me, they look very encouraging.

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Top side cut. All four edges.

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Bottom of cut. All four edges.


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Edge.

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Depth of cut taken.

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Same results in MDF core black.
 
Thank you.

The results do look good. I’ll head over to the sales page and see what options there are.

Think I’ll go with the 1-1/4.

Tom
 
I'm glad you asked. Please let me know what you think after you've run them. Rich got a little pumped when I mentioned it. We're already working on smaller diameter versions and he got all starry-eyed thinking about straight cutters for CNCs (without bearings).
 
I’ve already order the bit.

If it does not work as I hope I have an idea you can run by Rich;

The top shear blade ends at 55% of the height down, the bottom shear blade ends at 55% of the height up. This prevent the blade from “lifting/pushing” the show surface off the core.

Tom
 
Minimal feed resistance and surprising lack of grain lifting. Which is a little weird, since I find 3-flute spirals to have more feed resistance than 2-flute. I'm crediting the alternating shear.
 
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