Ingco 9.0mm HSS-Co M35 Twist Drill Bit | Cobalt High-Speed Steel Jobber Drill for Stainless Steel and Hard Metals (DBT01130901)

The Ingco DBT01130901 twist drill bit is an industrial-grade metalworking cutter engineered to penetrate high-tensile alloys and stubborn metals that standard high-speed steel bits fail to score. Featuring a precise 9.0mm diameter profile, this jobber-length bit is optimized for production-line drilling, structural steel fabrication, and demanding automotive repair applications where heat management is critical.

The bit is manufactured from premium M35 grade High-Speed Steel infused with 5% Cobalt alloy (HSS-Co). This cobalt enrichment significantly raises the tool's red-hardness—the ability of the cutting edges to maintain structural integrity and sharpness at elevated operating temperatures up to 600°C. To ensure fast penetration with minimal surface wandering, the bit features a 135-degree split-point tip layout, eliminating the need for a center punch on smooth surfaces. Precision-ground dual flutes facilitate rapid chip evacuation, minimizing thermal friction and preventing the bit from binding in deep-bore applications. Equipped with a standard straight shank, it integrates seamlessly into stable bench drill presses and heavy-duty hand drills.

Technical Specifications

• Brand: INGCO

• Model Number: DBT01130901

• Product Type: HSS-Co M35 Cobalt Twist Drill Bit

• Diameter (Metric): 9.0mm

• Flute Length: 81mm

• Overall Bit Length: 125mm

• Material Composition: M35 High-Speed Steel with 5% Cobalt Alloy (HSS-Co)

• Tip Angle Geometry: 135-Degree Self-Centering Split Point

• Shank Design: Cylindrical Straight Shank (Matches bit diameter)

• Manufacturing Process: Fully Ground from Solid Stock

• Primary Target Substrates: Stainless steel sheets (grades 304, 316), high-tensile carbon steel, cast iron, titanium alloys, hard bronze, and welded seams

• Primary Applications: Drilling out seized automotive exhaust studs, sheet metal panel fabrication, structural steel framing, marine hardware installations, and industrial machine tool maintenance

• Packaging Type: Packed by protective plastic pouch or blister layout