Identify the method of the actor of tap, bad quickly
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5#) fine knot, showing heat treatment and capable person is good character, smooth or inclined short, molecular grain (metallographic is organized) thick bad. Basically depend on to the stand or fall of tap its original material is qualitative, heat treatment, groove, precision, equipment, rotate speed and be pledged by treatment material, hardness, operate the quality of employee to wait a moment, much more relative! When choosing tap, qualitative to the original material of tap, heat treatment, groove want particularly advertent, be aimed at different treatment aperture, the proposal chooses the tap of different type! Recite scriptures of netizen Ma Ke replies: A few compensatory, look from the exterior: 1 .
Have deny nigrescent, hair is yellow, the trace of burn 2.
The horn before point is flat, have without negative talk arris or step 3.
The sign is clear analyse, accord with the material that additionally about the regulation tap treatment differs, different machine tool is even divisional the precision of tap, angle, additionally other parameter should fit work requirement. CNC Milling