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Colour Band Application Taps (CBA)
Yellow Band
Designed for more ductilematerials such as Aluminium, Magnesium
Alloys, Soft Brass (MS58), Plastics, Zinc Alloys and Copper. Used
to tap materials with hardness up to 250HB, tensile strength up to
900N/mm². Wide flutes allow more efficient swarf removal which
prevents clogging and excessive torque. High rake angle improves
shear characteristic and reduces build-up on the cutting edge,
allowing tap to cut more freely for longer periods. Spiral flute taps
have 40° right hand helix, allowing ductile material swarf to be
efficiently forced out of the hole. The yellow band tap is supplied as
standard in bright condition.
White Band
Designed for highly abrasive materials such as Cast Iron and
reinforced plastics. Used to tapmaterials with hardness up to 300HB
tensile strength up to 1000N/mm². Increased number of flutes
reduces torque and increases tap life. Taps have 15° right hand
helix. The white band tap is TiAlN coated as standard.
Fluteless Taps
For machine use on through or blind holes. Best suited for ductile
materials, such as aluminium and zinc alloys as the threads are cold
formed, not cut like a conventional tap. For slightly tougher materials
fluteless taps in the range of 5mm to 12mm can be supplied with a
gash.
