Regal Cutting Tools 018812RS M8x1.25 Bottoming Tap Solid Carbide

Product Description

The REGAL CUTTING TOOLS 018812RS is a straight flute bottoming tap engineered for threading M8x1.25 metric coarse threads in blind holes. Built from micrograin solid carbide, it delivers superior wear resistance and edge retention compared to high-speed steel alternatives. The bright/uncoated finish suits a wide range of work materials. With 4 flutes and a 6H class of fit tolerance, this tap produces accurate, clean internal threads. The D5 thread limit ensures proper sizing for standard metric fastener engagement. It is used by machinists, toolmakers, and production technicians working in precision manufacturing environments.

This tap is suited for bottoming applications where threads must extend close to the bottom of a blind hole. The straight flute geometry works best in short-chipping materials such as cast iron, brass, bronze, and some plastics. The 4-flute configuration provides chip clearance while maintaining stability during the threading operation. It is a standard fit for CNC machining centers, knee mills, and manual tapping operations where rigid setup and controlled feed rate are maintained.

Key Features

• Bottoming chamfer allows threads to be cut close to the bottom of blind holes
• Micrograin solid carbide construction for extended tool life and edge stability
• 4 straight flutes optimized for short-chipping work materials
• 6H class of fit for standard metric thread tolerance compliance
• D5 thread limit for consistent fastener fit and gauge compliance
• Right-hand thread direction, compatible with standard tapping operations
• Bright/uncoated finish with no coating buildup to affect thread geometry

Compatibility

Designed as a direct-fit bottoming tap for M8x1.25 metric coarse internal threading applications in CNC and manual machining setups requiring 6H tolerance class.

Installation Notes

This tap is installed by a machinist or toolroom technician. Secure the workpiece fully before tapping to prevent movement and tap breakage. Use appropriate tapping fluid or cutting oil for the work material to reduce heat and extend tool life. Solid carbide taps are brittle compared to HSS - avoid lateral loading, misalignment, or hand-reversal techniques that could cause fracture. Follow machine feed rates appropriate for carbide tooling and verify hole depth provides sufficient clearance below the threaded zone.