Product: Reduced Shank Drill Bits Key benefits Versatile fit: Reduced shank design lets larger-diameter bits be clamped securely in standard chucks and tool holders, increasing flexibility without changing machines or adapters. Durable and wear-resistant: Made from high-carbon bearing steel and heat treated to HRC 48°–50°, delivering long service life under repeated cutting and clamping. Consistent accuracy: Inner bore is finished by high-precision grinding to meet DIN standards, improving concentricity and reducing runout for better hole quality. Smooth surface finish: Surface roughness below RZ2.5 reduces stress concentrators and improves fatigue resistance. Available in two quality classes to match cost and precision requirements. Key features Material: High-carbon bearing steel, heat treated (HRC 48°–50°). Surface quality: Ra/Rz controlled with roughness below RZ2.5; two product classes offered. Inner bore: High-precision grinding according to DIN standard for accurate fit and concentricity. Compatibility: Designed for clamping screw taps, drills, milling cutters, reamers, and similar tools in standard chucks and holders. Function: Provides a reliable shank for secure clamping and stable rotation in drilling, tapping, milling, and reaming operations. Performance advantages Improved tool life and wear resistance from controlled hardness and quality surface treatment. Reduced vibration and runout due to precision-ground inner bore, producing cleaner holes and extended cutter life. Easier tool changes and broader tooling options because the reduced shank fits more common chucks and holders. Typical applications On-site maintenance and fabrication: Use the reduced shank bit in a portable drill to bore larger holes when machine-tool spindles or oversized tooling are not available. Machine-shop finishing: Clamp a reamer or milling cutter in the reduced shank for precise finishing passes where concentricity and surface quality matter. Production and assembly lines: Secure screw taps or drills in standard chucks for repetitive tapping or drilling tasks, benefiting from consistent hardness and reduced wear. Ordering notes Two product quality classes available—choose the class that matches your precision and budget requirements. Suitable for use where standard chucks or holders are required to accept larger-diameter tooling via a reduced shank. If you require specific size ranges or class details, provide your tooling specifications so the appropriate class and dimensions can be matched.