Bordo HSS Yellow Band Jobber Drill Bit

• 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.

About 130° Thinned

• The thinned point reduces end thrust and optimizes centre cutting efficiency with chisel strength.

About Drill Bit Surface Treatment

• Bright Finish a bright finish tool has no surface treatment and is supplied in the as-ground condition.
• These tools are suitable for general-purpose use, particularly for non-ferrous applications.