A new chisel has just one bevel, usually 25 degrees. But the tool should be sharpened at 30 degrees, which creates a new bevel.

What is the correct honing angle for a plane or chisel blade?

Bench plane and block plane blades have traditionally been beveled to 25°. Our blades for the handmade wooden planes were specified by James Krenov to have a 30° bevel. Chisels get different bevel angles for different tasks: 25° or lower for paring, 30° or more for chopping.

Do you need a micro bevel on a chisel?

The short answer is, No, micro bevels are not necessary with a Tormek. Microbevels are useful expedients for bench stone sharpeners. The idea is that you grind the entire bevel once and do touch up sharpenings with only a small fraction of the bevel.