Eagle Cutting Tool HT-11250-7-T-I Hss Hand Taper Tap

Product Description

The EAGLE CUTTING TOOL HT-11250-7-T-I is a high-speed steel (HSS) hand taper tap designed to cut internal threads in a variety of materials. This tap produces a 1-1/8 inch diameter thread at 7 threads per inch (TPI), following a standard Unified National Coarse (UNC) thread form. Taper taps are ground with a gradual lead chamfer — typically 8 to 10 threads — to distribute cutting load across multiple flutes and ease entry into the workpiece. This makes them well-suited for starting threads in through-holes or blind holes with adequate depth. Machinists and pipe fitters rely on this tool type for manual tapping operations in shop and field settings.

This hand taper tap is used in applications requiring large-diameter coarse threads, including structural fabrication, heavy equipment maintenance, and industrial machinery repair. It is designed for manual use with a tap wrench and is appropriate for threading through-holes in steel, cast iron, aluminum, and similar machinable materials. The import designation indicates sourced tooling manufactured to standard dimensional specifications for this thread size.

Key Features

• 1-1/8 inch diameter, 7 TPI UNC thread form for large-diameter coarse threading
• High-speed steel (HSS) construction provides durability and heat resistance during cutting
• Taper chamfer lead distributes cutting load for easier thread starting
• Designed for manual hand tapping with a standard tap wrench
• Suitable for through-holes and sufficiently deep blind holes

Compatibility

Designed as a standard hand taper tap for use in any application requiring a 1-1/8 inch - 7 TPI UNC internal thread cut by hand.

Installation Notes

This tap is intended for use by machinists or trade professionals familiar with manual tapping procedures. Before tapping, ensure the workpiece is securely clamped and that the correct pilot hole diameter for a 1-1/8 inch - 7 TPI thread has been drilled. Apply cutting fluid throughout the operation and back off the tap periodically to break chips and prevent binding. Do not force the tap if resistance increases suddenly, as HSS taps are brittle and can fracture under excessive torque.

Technical Specifications

• Thread Size: 1-1/8 inches - 7 TPI
• Thread Form: UNC (Unified National Coarse)
• Tap Type: Hand Taper
• Material: High-Speed Steel (HSS)
• Weight: 0.02 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-11250-7-T-I