Edge profiles can give tabletops a cutting edge.
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A cove bit has a simple profile. The bearing on the bit rides along a smooth edge of the wood and controls the depth the router bit will cut into the material. Rolling along the edge of the wood also prevents the bit from burning. Bits come with or without the bearing.
A roundover bit creates a simple rounded edge. This particular bit also has a bearing. When using this bit for a table edge profile, make sure the bearing has enough room to ride along the edge of the board without being impeded. To create a full roundover on the edge, use the router on the top edge of the bit first and then turn the board over to cut the rest of the roundover. Some sanding may be required as well.
An ogee with a fillet has a cove cut and a small roundover. The fillet creates a straight stepback on the top of the table edge.
A chamfer bit is a versatile, contemporary bit that can be used to cut edge profiles. The bit makes a simple 45-degree cut.
A classical bit has a cove, a roundover and a fillet. It gives a table edge a sharp relief at the top followed by an s-shaped curve underneath.
Edge profiles can also be created by combining bits, such as using one on the top of the table edge and another on the bottom of the edge.