hardness :HRC56-58,
carburized depth of more than 0.8;
Precision taper tolerance: less than AT3,
high precision of the handle connection;
The handle has a subject and tap holder in two parts;
Main body has the pitch before and after compensation device, tap holder with torque overload protection device, prevent tap broken;
Tap different in diameter, through the adjustment nut, can get different slip torque;
Surface coating processing, can improve the surface hardness, wear resistance, improves the cleanliness, precision is more stable, more smooth surface, anti-rust, anti-corrosion effect is better, feel more comfortable, more beautiful appearance.
Comprehensive precision less than 0.1
Applied to drilling, car, boring and machining center, etc;
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