It is the angle between face of the tool and a plane perpendicular to the side of the shank.It varies from 5 to 15 degrees.
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these are tools which have teeth in the edge were it's use for cutting
A chisel size is the width of the cutting edge.
decrease the cutting forces
1. cutting tool should be more harder than the material to be cut otherwise it can break during the process. 2.cutting tool should be tough.well,there is much difference between the word hard and tough. hardness implies resistance to scratch whereas toughness measure ability to withstand shock. 3.The tool should be able to withstand the heat generated in the metal cutting process. Also, the tool must have a specific geometry, designed so that the cutting edge can contact the workpiece without the rest of the tool dragging on the surface of the piece part surface. The angle of the cutting face is also importantol must be able to withstand the heat generated in the metal cutting process. The angle of the cutting face is also important as is the flute width, tool margin and tool material. SUGGESTIONS ARE WELCOME
It is a jig used in hand planing and cross cutting to length. You clamp it in a vise, or let the lower edge overhang the edge of a workbench. The purpose in using one is generally to avoid cutting your bench top with a saw.