Eagle Cutting Tool HT-12500-8-T-I Hand Taper Tap Hss

Product Description

The EAGLE CUTTING TOOL HT-12500-8-T-I is a high-speed steel (HSS) hand taper tap designed for cutting internal threads in through-holes and blind holes. This tap is sized at 1-1/4 inch diameter with 8 threads per inch (TPI), making it suited for large-diameter threading applications in metal fabrication, mechanical assembly, and maintenance work. The taper chamfer — typically 8 to 10 threads long — allows the tap to start easily in a hole and distribute cutting load gradually. Machinists, pipefitters, and millwrights commonly use taps of this size when threading heavy-gauge steel, iron, or similar ferrous materials by hand.

This tap is intended for hand-tapping operations where controlled torque is applied using a tap wrench. The 1-1/4 in-8 thread form is a coarse unified national (UNC) standard pitch used in heavy structural and industrial applications. It is appropriate for threading stock material, repairing threads in field conditions, or completing through-hole threads in a shop environment. The import designation indicates a cost-effective sourcing option for trade shops and tool cribs where volume use is anticipated.

Key Features

• High-speed steel (HSS) construction for durability against wear in ferrous materials
• Taper chamfer design eases hole entry and distributes cutting forces over multiple threads
• 1-1/4 in-8 UNC thread form for large-diameter coarse-pitch threading applications
• Designed for hand-tapping use with a standard tap wrench
• Import option provides a practical choice for high-volume or general shop use

Compatibility

Designed as a standard hand taper tap for use in 1-1/4 in-8 UNC threaded hole applications across general industrial, mechanical, and fabrication environments.

Installation Notes

This tap is installed using a tap wrench; power driving is not recommended for hand taps of this size without proper torque control. Always apply cutting fluid to the tap and workpiece to reduce friction and extend tool life. Back the tap off periodically to break chips and prevent binding, especially in blind holes. Secure the workpiece firmly before tapping to prevent movement during thread cutting.

Technical Specifications

• Thread Size: 1-1/4 inches
• Threads Per Inch (TPI): 8
• Thread Form: UNC (Unified National Coarse)
• Tap Type: Hand Taper
• Material: High-Speed Steel (HSS)
• Weight: 1.8 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-12500-8-T-I