Thread tap FANAR M18x1.5 NGMM/2 DIN-2181 LH (6H) HSS

FANAR M18x1.5 NGMM/2 DIN-2181 LH (6H) HSS is a left-hand cutting machine screw tap designed to produce M18 x 1.5 metric internal threads. Manufactured in high-speed steel, the tool complies with DIN‑2181 and is ground to the 6H tolerance class for thread accuracy. Its solid HSS construction makes it suitable for both manual and machine tapping operations in a range of metalworking and maintenance applications where left-hand threads are required.

Advantages

The tap’s left-hand cutting geometry enables thread creation in components that require reverse-thread orientation or that will be used in counter-rotating assemblies. Solid high-speed steel construction provides wear resistance and dimensional stability under typical machining conditions. Compliance with DIN‑2181 and 6H tolerance ensures predictable fit and interchangeability with standard metric fasteners. The tool’s geometry and finish are suitable for use in machine spindles or hand tap holders, offering flexibility for production and repair tasks.

Suitable for

• Cutting M18 x 1.5 internal metric threads in steel and other metals
• Production and assembly operations requiring left-hand threads
• Maintenance and repair tasks on mechanical components with reverse-threaded fasteners
• Machine tapping and controlled hand-tapping where DIN‑2181 compliance is required

Key specifications

• Thread size: M18 x 1.5
• Thread direction: left-hand
• Tolerance class: 6H
• Standard: DIN‑2181
• Material: high-speed steel (HSS)
• Tool type: machine screw tap, NGMM/2 style

How to use

Select a properly sized pilot drill and prepare the hole to the recommended drill diameter for an M18 x 1.5 internal thread. Secure the workpiece and align the tap with the hole axis. For machine tapping, mount the tap in a suitable collet or holder and set appropriate spindle speed and feed to match the material. For hand tapping, use a tap wrench with controlled, even torque. Rotate the tap in the cutting direction for left-hand threads (counterclockwise), and periodically reverse slightly to break chips and clear swarf. Apply an appropriate cutting fluid for the workpiece material to reduce tool wear and improve surface finish.

Usage recommendations

Use correct drill size, secure clamping, and appropriate cutting lubricant. Inspect taps for wear before use and replace when cutting performance or dimensional accuracy degrades. When switching between hand and machine tapping, verify alignment and speed settings to avoid breakage.