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spiral-cut-router-bit-key I have a question about spiral router bits as I have no experience using them. I have a chance to get a couple but with limited funds right now, I only want to get ones that I would use frequently. What type (up/down/compression), what diameter, and what function would you use them. From everything I’ve read it looks like an up-cut bit is used for hand-held routing when doing mortises and a down cut for router table work for dadoes, rabbets grooves. What are your thoughts?  Our production quality solid carbide spiral bits combine effective chip removal with a continuous shearing action cut not obtained from a standard straight bit. You’ll get smoother cutting action with better results. Up-cut Bits provide faster cutting while they pull chips up and out of the work or towards the router. What is a downcut router bit? Downcut spiral tools are best used for thinner materials which will be pushed down into the machine bed rather than being lifted with an upcut spiral. This can be particularly useful when using vacuum hold down where maintaining the seal between the material and sacrificial bed is crucial. These tools are predominantly used when a high quality cut finish is required on the top surface of cut parts. Downward spiral tools often require reduced cutting speeds because the chips are pushed back into the material. The chip extraction is generally less effective with thi. WHY SPIRAL BITS ARE BETTER FOR PLUNGE CUTS. Because a spiral bit is designed much like a drill bit, it makes plunge cuts easily. The cutters of a straight bit do not overlap, so if you plunge straight down deeper than 3/32 in., you might burn away the wood in the middle, but you won’t cut it. The increasingly popular spiral router bits borrow technology from the metalworking industry. Spiral bits look like drill bits and are most often made of solid carbide, so they are super sharp and leave a superior cut on wood. Two flutes ground around the body of a spiral bit smooth vibration by spreading. Sanders Wide Belt - Used. Jigsaw Blades. Tool Holders. Browse our huge range of industrial, second-hand woodworking machine online or visit us today. What are your thoughts? Splral Planer Blades.

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View as Grid List. Show 48 96 All. CMT part no Add to Basket. In Stock. Lead Time: 16 Days. Lead Time: 6 Days. View Details. So while for freehand an upcut will send dust upwards Router Bits Straight Cut Key towards your dust collection, it will send the dust under the Flush Cutting Router Bit Keys table when mounted on a table.

You might also want to look at compression bits, which have both upward and downward spirals. You have to be careful about getting the heights right so that both spirals can engage on the edges. In theory I have no experience on this both edges come out clean. I watched them all the other day — very useful before buying. Cheese Posts: Here's an example of a dado in maple ply using a Whiteside downcut spiral bit.

This dado was made in a single pass. Quote from: Cheese on August 13, , PM. Mario Turcot Posts: Have you also consider Spiral Compression Bits? More expensive but they are worth the price. Solid carbide compression spiral bits designed for CNC applications requiring high feed rates and a clean finish. Special unique carbide for longer lifetime in abrasive material. Designed for CNC applications requiring high feed rates and a clean finish.

Particularly suitable for double sided melamine or laminated material. To me this is the best type of bit when it comes to do hand free pockets. Dick Mahany just put it in my handheld router this morning and it does a great job. Smoother cutting and a great finish on the cut. Here's the one I'm using. Spiral bits work incredibly well in the production environment and especially in CNC computer numerically controlled router industrial applications.

But in a hand router, their use sometimes imposes unusual risks not associated with the equivalent or bigger straight bits. The down-cut spiral bit's screw-driven forces are sufficient enough to pick the router up and twist it out of your hands—with no warning.

I know, because it has happened to me. On end grain the spiral bit is getting even more traction, so the risk is even greater—a pity, too, because a sweet end-grain finish is attractive. The up-cut spiral bit can have the opposite effect. It wants to pick up the work. So you must secure the work in some kind of fixture or hold it by a clamp.

I never rout anything that is not secured or clamped, but some people do. I do keep a few solid-carbide spiral bits because, when I want a beautiful face cut or I am cutting narrow mortises, and I have the money, there is just nothing better. But my cabinet is mostly full of a wide variety of straight bits.

For general-purpose work, for template and pattern routing, and for those times when need a large-diameter bit, I still reach for one of my straight bits. Quick View. Add to Cart. You must be logged in to write a comment. Log In. Find a Store. My Account. My Cart. Go to Home Page. Mobile Navigation. Same Day Shipping Find a Store.

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