Additional information
| Set | 1/16-3/8" 21 Piece, 1/16-1/2" 29 Piece, 1/16-1/2" 21 Piece |
|---|
BORDO 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.
Related products
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Colour BandBORDO 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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Bright Finish HSSBORDO Bright HSS Jobber Drill Set
- 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.
- Bright Finish Twist Drills have no surface treatment and are supplied in the as-ground condition.
- These tools are suitable for general purpose use, particularly for non-ferrous applications.
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Colour BandBORDO Blue Band HSS-Co TiAlN Stainless Steel Drilling Metric
- Bordo Metric Blue Band HSS-Co TiAlN Coated Twist Drills for Stainless Steel.
- DIN338
- Multi-faceted point with two helical flutes with 35 degrees of helix angle.
- The machining of stainless steels is difficult due to its work hardening properties, toughness and poor thermal conductivity, which places high demands on the cutting tools.
- The Blue Band – Stainless Steel – Series has been specifically designed to suit these difficult machining requirements.
- TiAlN coating increases tool surface hardness to 87Rc.
- For machining materials with Hardness < 350 HB : Tensile Strength <1250 N/mm2.
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Colour BandBORDO Yellow Band HSS Aluminium Drilling
- Bordo Metric Yellow Band HSS Twist Drills for Aluminium and its alloys.
- DIN338
- 130° web thinned point with two helical flutes with 35 degrees of helix angle.
- The alloying elements which achieve varying Aluminium Alloys have an effect on the machining properties of these materials.
- This generally creates a difficult long chip formation and material which has tendencies to stick to the tool, placing a unique set of demands on tooling. Yellow Band Series contends with these difficulties.
- For machining materials with Hardness < 200 HB : Tensile Strength <700 N/mm2.
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