Cleveland C54923 Hand Tap 1-8 Unc Taper 4-flute Hss

Product Description

The CLEVELAND C54923 is a 1-8 UNC high speed steel hand tap designed for cutting internal threads in a range of ferrous and non-ferrous materials. It features a taper chamfer, which distributes cutting forces across the first several threads and guides the tap squarely into the workhole. With four straight flutes and a bright, uncoated finish, this tap is suited for both blind hole and through-hole threading applications. The H4 thread limit holds a Class 3B fit, making it appropriate for threaded fastener assemblies that require a tighter tolerance. Licensed machinists, tool and die makers, and maintenance technicians are the typical users.

This tap is intended for production and maintenance threading in alloy steel, carbon steel, aluminum, and free-machining stainless steel workpieces. The taper chamfer style is most effective when starting a thread from a fresh bore or when threading through soft to medium-hardness materials that benefit from a gradual load engagement. It is sold individually and suits both manual tapping with a tap wrench and low-speed machine tapping setups where the operator controls feed by hand.

Key Features

• 1-8 UNC thread form with right-hand direction and 3B class of fit
• H4 thread limit for controlled tolerance in close-fit assemblies
• Taper chamfer distributes cutting load across the lead threads for smooth entry
• Four straight flutes in a bright, uncoated high speed steel body
• Compatible with blind hole and through-hole threading operations
• Rated for alloy steel, carbon steel, aluminum, and free-machining stainless steel

Compatibility

Designed for use in any standard tap wrench or tapping fixture that accepts a 0.8-inch shank diameter; suitable for 1-8 UNC blind hole and through-hole threading applications in alloy steel, carbon steel, aluminum, and free-machining stainless steel workpieces.

Installation Notes

A licensed machinist or qualified maintenance technician should perform thread-tapping operations. Secure the workpiece firmly and ensure the starting bore diameter is correct for a 1-8 UNC tap before beginning. Apply an appropriate cutting fluid for the workpiece material to reduce heat and extend tool life. Advance the tap with steady, even pressure and back off periodically to break chips, particularly in blind hole applications.