1. Key points for slotting: radial rake angle, core thickness, helix angle, slot length, cylindrical toughness bandwidth, grinding wheel fillet, groove type requirements, etc.

2, the key points of the blade: radial back angle, blade diameter, blade length, peripheral blade width, diameter jump, inverted cone

3, the end edge key points: end front angle, end back angle, end width, edge inclination, end jump

4, the key points of the backlash: chisel edge, over-center amount, backlash angle, tooth expansion and exit, bottom corner arc, fusion depth, fusion angle, grinding wheel selection, length of the front surface of the ball head slotting

5, other key points: ball head, arc, taper, chamfer, cut, go high, profile, passivation, appearance, etc.