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Twist drill bit Bosch HSS hex-shank 9 mm
The Bosch Twist drill bit HSS with a 1/4-inch hex shank and 9 mm diameter is designed for precision drilling in metal and other common materials. Made to DIN 338 (Type N flute) with a 135° split-point tip and diameter tolerance h8, the drill bit is ground from solid high-speed steel and features an oxide-coated flute for improved wear resistance. The 1/4-inch hex shank provides secure engagement in impact drivers and chucks, making the bit suitable for universal use.
The HSS construction and precision grinding ensure robust drilling performance and long tool life. The oxide-coated flute reduces friction and wear while aiding chip evacuation. The 135° pointed split-tip gives active cutting and accurate centring to reduce walking at drill start. The 1/4-inch hex shank guarantees stable retention in impact drivers and quick-change chucks.
Insert the 1/4-inch hex shank securely into the driver or chuck and tighten according to the tool manufacturer’s instructions. Start drilling at low speed to establish the centre and then increase speed appropriate for the material. Use consistent feed pressure and clear chips regularly to avoid overheating. For best results in metal, apply suitable cutting fluid or lubricant.
Use appropriate personal protective equipment (safety glasses, gloves) and select drilling speed and lubricant suitable for the workpiece material. Store the drill bit in its blister packaging to protect the cutting edges.
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