CHICAGO-LATROBE Jobber Length Drill Bit Set: 115 Pc, 1/16″ to 1/2″ by 64ths, #60 to #1, A to Z

Description

These NAS-Spec high-speed steel jobber-length drill bit sets absorb more shock and vibration than cobalt and carbide drill bits, making them suitable for use in manual drilling machines and handheld power tools. The NAS (National Aerospace Standards) 907 standard indicates that bits meet high standards for high accuracy and strength required for use in the aerospace industry.

• Jobber-Length drill bits are the most commonly used and provide a good balance of strength and accuracy when drilling into a variety of materials.
• High Speed Steel drill bits absorb more shock and vibration than cobalt and carbide, making them suitable for use in manual drilling machines and handheld power tools.
• Black Oxide coating improves lubricity to reduce friction, minimize heat buildup, and improve wear resistance, chip flow, and tool life. It is a good choice for general purpose drilling and working with soft materials, such as plastic and low-carbon steel, and should not be used with aluminum and nonferrous metals.
• 135 ° drill bits are used on harder materials like stainless steel or titanium.
• Split Point drill bits are self-centering, requires less pressure to start, limits walking when used in stationary and portable drills.
• Straight Shank drill bits have the same diameter along the length of the bit for high concentricity and minimal tool runout for high-performance drilling.
• Spiral Flute drill bits are used in most general purpose holemaking applications to effectively evacuate chips as they drill into the workpiece.