Cleveland C54825 Hand Tap M18x1.50 Taper Rh D6 Hss

Product Description

The CLEVELAND C54825 is a straight-flute hand tap designed for cutting M18x1.50 metric fine internal threads in a range of workpiece materials. Built from high speed steel with a bright uncoated finish, this 4-flute tap is ground to a D6 thread limit and a 6H class of fit, delivering consistent thread accuracy for production and maintenance machining. The taper chamfer — typically 8 to 10 threads of lead — makes it well suited for starting threads in both blind and through-hole applications. Overall length is 4.031 inches with a thread length of 1.81 inches and a shank diameter of 0.542 inches.

This tap belongs to the Cleveland Series 1001 and is intended for use by machinists, tool-and-die makers, and maintenance technicians working on manual or low-speed machine tapping operations. The M18x1.50 metric fine pitch is commonly found in precision mechanical assemblies, automotive components, and industrial equipment where a finer thread engagement than the coarse M18x2.50 standard is required. It is appropriate for blind hole and through-hole threading operations across a variety of ferrous and non-ferrous workpiece materials.

Key Features

• M18x1.50 metric fine thread form, 6H class of fit, D6 thread limit for precise tolerance control
• Taper chamfer provides a gradual lead-in for easier thread starting in both blind and through holes
• 4-flute straight-flute geometry suits general-purpose tapping in a wide range of materials
• High speed steel construction provides wear resistance in production machining environments
• Bright uncoated finish — no coating buildup that can affect thread tolerance in close-tolerance applications
• Square drive shank: 0.406 inches square size, 0.625 inches square length, compatible with standard tap wrenches and holders

Compatibility

Rated for use in alloy steel, aluminum, carbon steel, and free-machining stainless steel workpieces. Designed as a standard hand tap for use with conventional tap wrenches, T-handle wrenches, and manual tapping fixtures accepting a 0.542-inch shank diameter.

Installation Notes

Tapping should be performed by a qualified machinist following established cutting tool procedures. Secure the workpiece before tapping and apply appropriate cutting fluid for the workpiece material to reduce friction and prolong tap life. For blind hole applications, calculate tap depth carefully to prevent bottoming out and tap breakage. Never force a tap against resistance — back off periodically to break chips, especially in deeper holes.