Cleveland C55290 Spiral Point Tap 0-80 Unf Tin Hss

Product Description

The CLEVELAND C55290 is a spiral point tap designed for through-hole threading in metalworking applications. It cuts a 0-80 UNF thread profile using a 2-flute, plug chamfer geometry that pushes chips forward ahead of the cutting zone, keeping the flutes clear during operation. The tap is manufactured from high speed steel and coated with titanium nitride (TiN) for improved surface hardness and wear resistance. It carries an H2 thread limit and a Class 2B fit tolerance, making it suitable for standard fastener thread requirements. Licensed machinists, tool-and-die workers, and maintenance technicians are the typical users for this size range.

This tap is intended for through-hole threading operations in small-diameter fastener applications. The 0-80 thread size is among the finest commercially standard UNF pitches and is commonly encountered in instrument work, electronics enclosures, optical assemblies, and precision mechanical subassemblies. Suitable material applications include alloy steel, carbon steel, and aluminum. The spiral point geometry makes it particularly effective in through-holes where chips can exit freely in front of the tap rather than packing behind it.

Key Features

• 0-80 UNF thread form with Class 2B fit and H2 thread limit for standard tolerance threading
• Spiral point (gun tap) geometry pushes chips forward, reducing clogging in through-hole applications
• High speed steel construction provides toughness across a range of ferrous and non-ferrous materials
• TiN coating increases surface hardness and extends tool life compared to uncoated HSS
• Plug chamfer (3-5 thread lead) eases entry and is suitable for most standard through-hole jobs
• Right-hand cut, no coolant-through requirement, compatible with conventional tapping setups

Compatibility

Designed for through-hole threading in alloy steel, carbon steel, and aluminum workpieces requiring a 0-80 UNF Class 2B thread. Part of the CLEVELAND Series 1011TN spiral point tap line.

Installation Notes

This tap is installed and operated by machinists or maintenance technicians using a tap wrench, tapping head, or CNC machine spindle. Always ensure the workpiece is securely fixtured and the tap is started perpendicular to the hole to avoid thread runout or breakage at this small diameter. Apply appropriate tapping fluid for the workpiece material before and during the operation. Due to the small shank diameter, use controlled feed pressure to minimize the risk of tap breakage.