KINCROME 7 Piece HSS Drill Bit Set – Metric
Contents
Sizes: 1.5, 2.0, 3.0, 4.0, 5.0, 5.5, 6.0mm
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Cobalt HSS-Co5BORDO Cobalt HSS-Co5 Jobber Drill Fractional Set
- Bordo Fractional Cobalt Tough HSS-Co5 Twist Drills.
- ANSI B94-11
- 135° Split Point (crankshaft point).
- Split point is self centering and the short distance from the drill axis to the outer corners results in faster penetration, reducing the need for end thrust.
- The 135° point should be used to cut harder steel materials especially in deep hole applications.
- In these situations it will produce thicker chips minimising work hardening of the cavity.
- Faster penetration reduces abrasion and friction along the cutting edges.
- Cobalt HSS Twist drills are extremely hard and provide superior performance and increased tool life especially in stainless steel and high tensile steel.
- Bronze Finish (gold oxide) surface treatment. The metallic brown coloured low temperature temper treatment is normally only used on cobalt tools for identification purposes.
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Colour BandBORDO Green Band HSS-Co TiN Carbon Steel Drilling
- Bordo Metric Green Band HSS-Co TiN Coated Twist Drills for Carbon Steel.
- DIN338
- 130° split point with two helical flutes with 33 degrees of helix angle.
- The machinability of different carbon steels is as varied as their properties. Soft-tough construction steels place a unique set of demands on the tools.
- The Green Band Series of drills and taps have been developed specifically for this range of steels.
- For machining materials with Hardness < 250 HB : Tensile Strength <900 N/mm2.
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Colour BandBORDO Red Band HSS-Co TiAlN Tough Treatable Steel Drilling
- Bordo Metric Red Band HSS-Co TiAlN Coated Twist Drills for Tough Treatable Steel.
- DIN338
- 130° UX point with two helical parabolic flutes with 33 degrees of helix angle.
- The mechanical properties of materials are influenced diversely by the addition of alloying elements and heat treatment processes, resulting in some high-strength, quenched and tempered steels or hardened steels.
- This range has its own unique set of machining requirements which are satisfied by the Red Band – Tough Treatable Steel – Series.
- TiAlN coating increases tool surface hardness to 87Rc.
- For machining materials with Hardness < 470 HB : Tensile Strength <1500 N/mm2.
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