Eagle Cutting Tool HT-080-B-I 0-80 Hss Hand Bottom Tap

Product Description

The EAGLE CUTTING TOOL HT-080-B-I is a 0-80 high-speed steel (HSS) hand bottom tap designed for cutting threads to the bottom of blind holes. The 0-80 designation refers to a #0 major diameter with 80 threads per inch (TPI), one of the finest thread pitches in standard inch-series tapping. Bottom taps have minimal chamfer on the lead threads, allowing the tap to cut full threads as close to the base of a blind hole as possible. This tap is intended for hand tapping operations and is a cost-effective import-grade option for shops and technicians who need reliable thread-cutting performance at high thread counts.

This tap is suited for threading small-diameter blind holes in light-duty applications across electronics assembly, instrument fabrication, precision mechanical work, and similar trades where fine-pitch 0-80 threads are specified. It is commonly used in conjunction with a 0-80 plug or taper tap to start the thread, with this bottom tap used as a finishing pass to extend threads to the hole floor. Typical materials being tapped include aluminum, brass, and mild steel.

Key Features

• 0-80 thread form — #0 major diameter at 80 TPI for fine-pitch threading
• Bottom chamfer style — cuts full threads close to the base of blind holes
• High-speed steel (HSS) construction — provides hardness and wear resistance suitable for hand tapping
• Hand tap design — intended for use with a tap wrench or hand-held tapping tool
• Import grade — practical choice for general shop use and volume tapping setups

Compatibility

Designed as an OEM-style replacement or standard shop tap for any application requiring 0-80 unified fine thread tapping in blind-hole configurations.

Installation Notes

Installation is performed by qualified machinists or technicians using a standard tap wrench sized for the tap shank. Always use cutting fluid or tapping compound appropriate for the workpiece material to extend tap life and reduce the risk of breakage at this small diameter. Back the tap out periodically to clear chips and prevent tap breakage, which is a common risk with fine-pitch, small-diameter taps. Ensure the tap is started straight and perpendicular to the workpiece surface before applying rotational force.

Technical Specifications

• Thread Size: 0-80
• Threads Per Inch: 80 TPI
• Tap Type: Hand Bottom Tap
• Material: High-Speed Steel (HSS)
• Weight: 0.63 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-080-B-I