SP TOOLS High Speed Steel (HSS) Drill Bit Set – Metric – 19pc
FEATURES
- Made from high quality high speed steel (HSS) offering the best combination of strength, heat & wear resistance
- Industrial grade – extremely sharp, strong and durable
- Precision engineered parallel shank for accurate hole size
- Drills perfectly round holes in steel, brass, plastic, wood etc.
SIZES INCLUDED
- 1-10mm (0.5 Increments)
SKU: SP31390
Categories: Drill Bits, Jobber
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IMPACT Hex Shank HSS Twist Drills
BORDO IMPACT Hex Shank HSS Twist Drill
- 1/4″ Hex Shank Twist Drill for Impact Drivers.
- One piece solid core design is significantly more durable than the conventional two piece design that utilises a hex sleeve on a standard round drill bit.
- Specifically engineered for use in impact drivers these bits are also fully compatible with conventional rotary drills.
- 135° split point delivers a precision start and prevents bit wander for fast, accurate holes.
- Premium quality M2 HSS ensures extreme performance and long bit life.
- 1/4″ hex shank facilitates fast tool loading in cordless impact drivers and quick change adaptors.
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Cobalt HSS-Co5
BORDO Cobalt HSS-Co5 Jobber Drill Metric Set
- Bordo Metric Cobalt Tough HSS-Co5 Twist Drills.
- DIN338
- 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 Band
BORDO White Band HSS-Co TiAlN Cast Iron Drilling
- Bordo Metric White Band HSS-Co TiAlN Coated Twist Drills for Cast Iron.
- DIN338
- 118° / 70° DX point with two helical flutes with 33 degrees of helix angle.
- A highly abrasive material with damping and thermal conductivity, high strength and resistance to wear. Cast Iron is used extensively for mass produced components.
- The White Band Series is designed for this specific purpose. TiAlN coating increases tool surface hardness to 87Rc.
- For machining materials with Hardness < 300 HB : Tensile Strength <10900 N/mm2.
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Black Finish HSS
BORDO Black HSS Jobber Drill Metric Set
- DIN338
- 118° Split Point (crankshaft point)
- Split point is self centering and reduces the need for end thrust.
- Friction at workpiece is reduced.
- 118° point angles are ideal for use in materials such as mild steel and cast iron.
- The 118° point creates easily controlled chips which are wide and thin.
- Black Finish Twist Drills (also called blue finish) achieve their distinctive colour by steam tempering, a thermal process resulting in a porous tool coating.
- This surface helps to keep lubricant on the tool, particularly important on the cutting edges, thus reducing friction and cold welding. The result is increased tool life.
- Black finish tools are generally recommended for ferrous applications where the oxide layer aids chip flow and heat dissipation.
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