Dormer A777 Heavy-Duty Hsco Jobber Drill Bit 7.50 mm Pack of 10

High-performance cobalt drill bits designed for demanding drilling applications, including steel and tough materials used in aerospace and industrial settings. They feature HSCo cobalt steel with a bronze surface treatment and a 7.50 mm tip diameter, with an overall length of 109 mm and a working length of 69 mm. A 135° split point provides self-centering guidance for sizes 1.00 mm and above, while smaller sizes use an 118° conical point. The bits have standard flute geometry with a right-hand spiral and thick web, and are produced to a tight tolerance (h8). They have a cylindrical shank and are compatible with standard drill chucks and drill presses, sold as a pack of 10.

Features

• 7.50 mm diameter, 109 mm overall length
• 69 mm working length, 135° split point (≥1.00 mm)
• 118° conical point for smaller sizes
• HSCo cobalt steel with bronze surface treatment
• Standard helix, right-hand spiral, thick web; h8 tolerance
• Cylindrical shank; compatible with standard chucks and presses

Technical specifications

• Material: HSCo cobalt steel with bronze surface treatment
• Tip diameter: 7.50 mm; Overall length: 109 mm; Working length: 69 mm
• Point geometry: 135° split point for sizes ≥1.00 mm; 118° conical point for smaller sizes
• Flute geometry: standard helix, right-hand spiral, thick web; Tolerance: h8
• Shank type: cylindrical; Pieces per pack: 10