Cleveland Controls C55294 Spiral Point Tap 3-48 Unc Hss Tin

Product Description

The CLEVELAND CONTROLS C55294 is a spiral point tap designed for through-hole threading in a range of metals. It cuts a 3-48 UNC thread profile using a plug chamfer to ease entry and guide chip flow forward, keeping the flutes clear during production runs. Built from high speed steel with a titanium nitride (TiN) finish, it offers increased surface hardness and wear resistance compared to uncoated HSS. The tap has a 2-flute configuration, a right-hand thread direction, and meets Class 2B fit tolerance under the H2 thread limit. Overall length is 1.813 inches with a thread length of 0.5 inches.

This tap is suited for through-hole threading operations in alloy steel, aluminum, and carbon steel workpieces. It is appropriate for machine tapping and hand tapping setups where a 3-48 UNC thread is required. The plug chamfer style makes it a general-purpose choice for production and maintenance work, including light fabrication, instrument assembly, and mechanical repair tasks where small-diameter unified coarse threads are specified.

Key Features

• 3-48 UNC thread profile with plug chamfer for guided entry and forward chip ejection
• High speed steel construction for toughness across alloy steel, aluminum, and carbon steel
• TiN coating increases surface hardness and extends tool life versus uncoated HSS
• H2 thread limit, Class 2B fit for standard tolerance threading applications
• Right-hand cut, 2-flute design suited for through-hole applications
• Overall length of 1.813 inches with a 0.5-inch thread length for compact setups

Compatibility

Designed for through-hole threading in alloy steel, aluminum, and carbon steel. Fits standard tap holders and chucks sized for a shank diameter of 0.141 inches with a 2.79 mm square drive. Suitable for use in CNC tapping heads, drill press setups, and hand tap wrenches accepting this shank size.

Installation Notes

This tap should be installed by a machinist or maintenance technician familiar with tapping procedures for small-diameter threads. Ensure the workpiece is secured and the pilot hole diameter is correct for a 3-48 UNC tap before starting. Use appropriate cutting fluid for the material being tapped. Do not force the tap if resistance increases unexpectedly, as small-diameter taps are susceptible to breakage under side load or misalignment.