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Illustration Description

Illustration	Description
	Thread of blind hole, as the length of thread is more than diameter of 3 times. It is very important to rule out the chip in the threading process. We suggest choose spiral flutes tap or roll form tap is suitable.
	Thread of through hole, as the length of thread is more than diameter of 3 times. It is very important to rule out the chip in the threading process. We suggest choose Pointed Flutes Tap or Roll Form Tap is suitable.
	The characteristic of chip from threading process is short (include sheet, powder, lump).
	The characteristic of chip from threading process is longer (include filamentous, wire, long strips, screw strip).
	Right hand thread, turning clockwise to fasten thread parts and turning counterclockwise to loose thread parts.
	Left hand thread, turning counterclockwise to fasten thread parts and turning clockwise to loose thread parts.
	The thread tools/cutters are full tungsten carbide material.
	The tungsten carbide blade are welded on the thread tools/cutters.
	The chamfer length (the invalid thread pitches) of thread die/ tap is the cutting part . The chamfer length is 2 times thread pitch for blind hole.
	The chamfer length (the invalid thread pitches) of thread die/ tap is the cutting part . The chamfer length is 4 times thread pitch for through hole.