Sandvik Coromant 7781852 Carbide Jobber Drill Bit 8.50mm

Product Description

The SANDVIK COROMANT 7781852 is a solid carbide jobber-length drill bit designed for high-performance drilling in a wide range of metallic workpiece materials. Built to Series 860-GM specifications, it carries a multi-layer TiAlSiN and TiSiN coating that extends tool life and supports elevated cutting speeds. The bit measures 8.50 mm (0.3346 inches) in diameter with a 140-degree drill point angle engineered for self-centering entry and reduced thrust force. Overall length is 152.00 mm (5.98 inches), flute length is 106.00 mm (4.17 inches), and the straight cylindrical shank is 10.00 mm (0.39 inches) in diameter. This is a tool for machinists, CNC operators, and toolroom technicians working in production or job-shop environments.

The 7781852 is rated for drilling into steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials — spanning ISO material groups P, M, K, N, S, and H. The 11xD flute-to-diameter ratio and coolant-through capability make it particularly suited for deeper hole applications where chip evacuation and thermal management are critical. It conforms to DIN 6535HA shank specifications and is sold individually.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• Multi-layer TiAlSiN and TiSiN coating for heat resistance and extended tool life
• Coolant-through design supports chip evacuation in deep-hole drilling up to 69.50 mm (2.74 inches)
• 140-degree point angle reduces entry thrust and improves hole accuracy
• Right-hand cut with regular spiral flute; two-flute geometry balances chip flow and rigidity
• Straight cylindrical shank conforms to DIN 6535HA for broad toolholder compatibility
• Material grade X1BM optimized for high-performance drilling across ISO P, M, K, N, S, and H material groups

Compatibility

Designed as an OEM-specification replacement or direct-use tooling for machining centers, CNC drilling stations, and manual drill presses accepting a 10.00 mm straight cylindrical shank conforming to DIN 6535HA. Suitable for workpiece materials including steel, stainless steel, cast iron, non-ferrous metal, superalloys, titanium, and hard materials.

Installation Notes

Installation should be performed by a qualified machinist or CNC toolsetter. Ensure the machine spindle and toolholder are fully powered down and locked before changing tooling. Verify toolholder bore and collet size match the 10.00 mm shank diameter before clamping. When using coolant-through capability, confirm the machine coolant circuit is properly connected and set to the tool manufacturer's recommended flow rate before initiating a cut.