Cobalt HSS Fractional Aircraft Drill Bits

Business Aircraft Consumables (BAC) offers cobalt HSS fractional aircraft drill bits for aviation maintenance, repair, overhaul, and shop drilling applications. Available in a range of fractional inch diameters, these twist drill bits give aircraft maintenance technicians and MRO purchasing teams options for common drilling requirements. Made to NAS 907 Type J specifications with with heavy duty flute construction and 135° split point.

These drill bits are offered as a closeout item at special pricing while remaining inventory lasts. Choose the required diameter from the size selector above and check current availability before ordering.

Product Features

• Fractional inch sizing: Select from 17 available nominal diameter options.
• High-speed steel (HSS): A versatile cutting-tool material used in a wide range of drilling applications.
• Twist drill design: Spiral flutes help evacuate chips during drilling.
• Aviation maintenance supply: Suitable for consideration in aircraft maintenance and general shop applications when the bit matches the material and approved work requirements.
• Closeout opportunity: Special pricing on limited remaining quantities.

Applications in Aircraft Maintenance

Fractional drill bits are used for drilling operations where a specified inch-based hole diameter is required. Depending on the bit's verified specifications, workpiece material, and approved maintenance procedures, applications may include shop fabrication, component work, and other maintenance tasks.

Always verify the required diameter, cutting-tool specifications, material compatibility, and applicable maintenance instructions before use. Do not assume a drill bit is approved for a particular aircraft structural repair solely because it is listed as an aircraft drill bit.

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