Dormer A777 7.00MM HSCo Heavy Duty Jobber Drill

The Dormer A777 Heavy-Duty Cobalt Jobber Drill is crafted for demanding drilling tasks, especially on tougher materials common in aerospace and high-tensile applications. It employs a 135° split point in certain sizes to promote self-centering and easier penetration, while a 118° variant is available for other diameters. Made from HSCo cobalt steel with a bronze finish, this drill bit emphasizes durability and heat resistance during extended use. Its geometry and construction are designed to provide reliable performance in metalworking environments, whether mounted in a drill press or used with handheld tools. The bit conforms to DIN 338 RN, BS328, and ISO 235 standards, and is specified for heavy-duty applications where robust cutting action is required.

Features

• Material: HSCo cobalt steel with bronze finish
• Flute geometry: Standard helix, right-hand spiral
• Point options: 0.30–0.95 mm 118°; 1.00–1.40 mm 135°; 1.50 mm+ 135° split
• Tip diameter and lengths: 7.0 mm; 69 mm working length; 109 mm overall length
• Standards and use: DIN 338 RN/BS328/ISO235; aerospace/high-tensile suitability; compatible with chucks and machines