Guhring 9057170050000 Spiral Flute Tap M5x0.8 Cobalt

Product Description

The GUHRING 9057170050000 is a spiral flute tap designed for blind hole threading in metric applications. Part of the Series 5717 line, it cuts M5x0.8 threads to a 6H class of fit with a D4 thread limit. The tap is manufactured from cobalt high-speed steel with an oxide finish, giving it the hardness and heat resistance needed for demanding materials. A 40-degree helix angle and fast flute style drive chips up and out of blind holes efficiently. Overall length is 70.00 mm (2.76 inches) with a thread length of 8.50 mm (0.33 inches). Licensed machinists and toolroom technicians use this tap in manual and CNC tapping operations.

This tap is suited for blind hole threading across a wide range of materials including alloy steel, alloy tool steel, aluminum alloy, case-hardened steel, cast iron, ductile iron, free-cutting steel, heat-treated steel, malleable cast iron, stainless steel, structural steel, and tool steel. The modified bottoming chamfer allows threading close to the bottom of a blind hole, making it a practical choice for tight-tolerance production and repair work in manufacturing, toolroom, and maintenance environments.

Key Features

• M5x0.8 metric thread, 6H class of fit with D4 thread limit for consistent tolerance control
• Cobalt HSS construction with oxide finish for heat resistance in hard and abrasive materials
• 40-degree helix angle with fast flute style for effective chip evacuation in blind holes
• Modified bottoming chamfer for threading close to the bottom of blind holes
• 3 right-hand flutes, right-hand thread direction, no coolant-through requirement
• Shank diameter 3.50 mm (0.14 inches), square size 2.70 mm for standard tap holders

Compatibility

Designed as an OEM-style replacement or new-installation tap compatible with standard tap holders and chucks accepting a 3.50 mm shank. Suitable for use across the material applications listed in the specifications section.

Installation Notes

This tap is installed by machinists or toolroom technicians in manual drill presses, tapping arms, or CNC machining centers. Ensure the workpiece is securely fixtured and the tap is properly aligned before engagement to avoid tap breakage, especially in blind holes. Use appropriate tapping fluid or cutting oil for the workpiece material. Do not reverse the tap until the desired thread depth is reached in CNC applications using a rigid tapping cycle unless the machine compensates automatically.