Sandvik Coromant 6871300 Straight Flute Tap 1/4-20 Unc

Product Description

The SANDVIK COROMANT 6871300 is a straight flute machine tap designed for cutting 1/4-20 UNC internal threads in production and maintenance applications. Built from high-speed steel with a TiAlN coating, it delivers extended tool life in ferrous materials, particularly cast iron. The tap features 5 flutes, a 2BX class of fit, right-hand thread direction, and coolant-through capability for efficient chip evacuation and heat management at the cutting zone. Overall length is 3.15 inches (80 mm), with a thread length of 0.61 inches (15.6 mm) and a tapping depth of 0.98 inches (25 mm). It belongs to the CoroTap 100 series and is suited for machine tapping operations on CNC machining centers and drill presses.

This tap is intended for machine tapping in shop and production environments where consistent thread quality and tool longevity are priorities. It is rated for cast iron applications and is appropriate for use in job shops, manufacturing facilities, and maintenance operations requiring reliable 1/4-20 UNC threads. The coolant-through design makes it well suited for deeper tapping operations where chip clearance and thermal control are critical. The 2BX class of fit indicates a modified tolerance suitable for use with external thread coatings or platings on mating fasteners.

Key Features

• TiAlN coating extends tool life in abrasive and ferrous materials including cast iron
• 5-flute straight flute design for stable cutting action and precise thread form
• Coolant-through capability supports chip evacuation in deeper tapped holes
• 2BX class of fit accommodates plated or coated external thread components
• Right-hand thread direction, 1/4-20 UNC standard
• CoroTap 100 series construction for consistent machine tapping performance

Compatibility

Designed for machine tapping of 1/4-20 UNC threads in cast iron workpieces. Rated for use with CNC machining centers, drill presses, and tapping machines equipped with appropriate tap holders. Material application per manufacturer data is cast iron.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and the workpiece is securely fixtured before tool change or setup. Use a floating tap holder or rigid holder as specified by the machine setup; verify coolant-through supply is active when applicable. Do not reverse feed the tap under power unless the machine is programmed for rigid tapping cycles.