Select the type of tap

We often use are: straight flute tap, spiral flute tap, spiral point taps, forming taps, its performance strengths.

Straight flute taps the most versatile, through-hole or blind hole, non-ferrous metal or black metal can be processed, the cheapest price. But the targeted poor, what can be done, nothing is done best. Spiral flute tap is suitable for machining blind hole thread discharge machining chips back. Due to the helix angle of the reason, tap the actual cutting rake angle will increase with the increase of the helix angle.

Experience tells us: the processing of ferrous metals, helix angle selected smaller, usually around 30 degrees, to ensure the strength of the helical teeth. Processing of non-ferrous metals, helix angle bigger election, may be around 45 degrees, cutting some sharp. When the screw tip tap threading chips forward discharge. Taps squeeze more suitable for processing non-ferrous metals.

Spiral flute tap and tip tap different selection methods:

Spiral flute tap is suitable for machining blind hole thread (also known as blind holes), discharge machining chips upward. Due to the helix angle of the reason, tap the actual cutting rake angle will increase with the increase of the helix angle. Experience tells us: the processing of ferrous metals, helix angle selected smaller, usually around 30 degrees, to ensure the strength of the helical teeth, which will help prolong the life of the tap. Processing non-ferrous metals such as copper helix angle selected large-magnesium and zinc that can be around 45 degrees, cutting some sharp, conducive chip.

When the tip tap threading chips discharged directly downward, its core design is relatively large size, good strength, can withstand greater cutting forces. Processing non-ferrous metals, stainless steel, black metallic effects are good, threaded through holes should be given priority tip tap.