Must Have Router Bits: Roundover Bits Make Curved Edges on Workpieces
posted on December 1, 2010 by AJ Hamler
Roundover router bits Roundover bit size is determined by the radius of the curve, these two are 3/4" bit (above) and 1/16" bit.

The perfect choice for easing sharply squared edges, roundover bits are sized by radius. (Imagine that curved edge as part of a circle — the bit size corresponds with the radius of that full circle.) Sizes start at 1/16" radius that barely breaks a square edge — in fact, unless you have a lot of edges to do, you might be better off using a sanding block for that kind of roundover — on up to a 1-1⁄2" radius bit that is probably far larger than most shops would need. (Even larger roundover cutters exist, but they’re more suited to industrial applications.) You can buy a set with several bits, but if you’re like me, you’ll probably use the 1/4", 3/8" and 1/2" radius bits most often.

Roundover bits are normally used to create a smooth, even curve on a workpiece, but they also have one sharp cutting edge at the bottom of the radius that creates a 90-degree cut at the top of the roundover if the bit is fully extended. Used in this manner, a roundover bit makes a decorative thumbnail edge. A variation on the roundover bit has these 90-degree cutting edges both top and bottom, and it is often called a beading bit. The bit creates a curve bounded on each end with a 90-degree corner.

posted on December 1, 2010 by AJ Hamler
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What People are Saying:

I have been ordering from Rockler for almost 20 years and have found their products to be very inexpensive and of high quality. Shipping is fast even when an item is back ordered. The best prices I have found anywhere."

- Orval - 08/07/2012
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