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A down cut bits push chips downward, delivering smooth top surfaces with minimal tear-out — ideal for plywood, hardwood, and laminated boards. Made from solid carbide for durability and precision, they’re perfect for joinery, grooves, and clean-edge cuts where surface finish matters most.
TOOL SPECS: Solid carbide, down cut spiral with 1/4" cutting diameter, 1/4" shank, 1" cutting length, and 2-1/2" overall length for use in routers with a 1/4" collet.
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*Customized sizes are acceptable
At SpeTool, safety is our top priority. Please read the following precautions carefully before using any of our cutting, routing, or drilling products.
Always wear eye protection, hearing protection, and a dust mask while operating tools.
Avoid wearing loose clothing, gloves, or jewelry that could catch in moving parts.
Keep hands, hair, and body parts away from the cutting area at all times.
Never use dull or damaged bits. Replace worn tools immediately.
Do not remove or disable safety guards on your machinery.
Always feed material against the rotation of the cutting tool.
Disconnect power before changing bits or performing maintenance.
Follow the safety instructions provided by your power tool manufacturer.
Improper use, modification, or misuse of this product may result in serious injury. SpeTool is not responsible for damage or injury caused by unsafe practices.
Re-sharpening or grinding SpeTool bits may release dust containing cobalt or other substances. Always use proper respiratory protection.
Wood dust generated during drilling, cutting, or sanding may pose a cancer risk. Avoid inhalation and use appropriate safety equipment.
This product may expose you to lead and/or cobalt, chemicals known to the State of California to cause cancer and reproductive harm.
🔗 Learn more about California Proposition 65
Stay safe. Work smart. Use protection.
For additional safety tips, consult your machine’s user manual or reach out to our support team.
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Software |
Tool File |
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Fusion 360 Tools File |
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Vectric Tools File |
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Carveco Tools File |
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Carbide 3D Tools File |
A bit designed to push chips downward, resulting in a clean top surface with minimal tear-out.
Plywood, laminates, veneer, and finish-grade panels where a clean top surface is crucial.
When the top surface will be visible and needs to be perfectly clean (e.g., dados, grooves, or templates).
Not ideal. Downward chip compression can cause clogging and heat buildup in deep cuts.
They can if chip evacuation is poor. Use multiple shallow passes and proper feed rate to avoid it.
Make shallow passes and avoid pushing the bit too fast. Ensure your router is powerful enough.
Yes, especially when the template is on the top surface — it helps prevent tear-out along the template edge.
You can, but remember the chip direction will push back toward the workpiece, so dust collection and safety are key.
Poor chip ejection on deep cuts. Not ideal for cutting all the way through thick material.
Wow!!! This spiral router bit works great!!! Used it to make circle cut outs for speakers. Very clean cuts. Not sure how long it will stay sharp but if it doesn’t last long, I will update my review.
I followed up this purchase by buying it directly from the manufacturers website. The price was the same but shipping was WAY faster.
Wonderful product....well made and packaged with fast delivery. Will purchase more from this company.
I originally bought this to make a pen / pencil holder for my wife, who like to sketch ... it has 204 holes in the top, with matching pockets in the base, and it was made out of white oak ... the bit took care of that task very well (I used a spiral milling method). Then today I used it in purple heart, milling a 3.9" diameter x 0.35" deep pocket that will hold a phone charging pad, and again with very good results. Note: I tend to use conservative feed and speed values ... in this latter case I used about 15000 rpm, 40 ipm, 0.05" depth per pass ... I could definitely have gone faster, but it's not worth it to me to save a few minutes and risk having issues.
I use SpeTool bits all the time with my CNC router. They are great quality and don't dull easily.
