Eagle Cutting Tool HT-35000-8-T-I Hss Hand Taper Tap

Product Description

The EAGLE CUTTING TOOL HT-35000-8-T-I is a high-speed steel (HSS) hand taper tap designed for cutting 3-1/2 inch diameter threads at 8 threads per inch (TPI). Taper taps feature a gradual thread lead that distributes cutting load across multiple teeth, making them the standard starting tap for threading new holes in metal workpieces. At 6.3 pounds, this is a heavy-duty tool suited for large-diameter threading work performed by machinists, pipefitters, and maintenance trades working with oversized fastener applications or structural components requiring coarse unified threads.

This tap is intended for hand threading operations in through-holes or blind holes where a taper lead is appropriate for starting the thread. The 3-1/2 inch-8 TPI thread specification places this tool in large-diameter, coarse-pitch applications common in heavy industrial fabrication, machinery assembly, and structural repair work. It is imported tooling suitable for production or maintenance shops where periodic large-diameter tapping is required.

Key Features

• HSS construction provides hardness and wear resistance suitable for threading steel and other ferrous metals
• Taper lead distributes cutting force gradually, reducing tool breakage risk when starting threads
• 3-1/2 inch diameter at 8 TPI matches coarse unified thread series for large fastener applications
• Minimum order quantity of 1 allows single-unit purchase for low-volume or maintenance needs

Compatibility

Designed for hand tapping operations producing 3-1/2 inch-8 TPI unified coarse threads in compatible workpiece materials. Verify tap wrench drive size capacity before use, as large-diameter taps require appropriate drive tooling rated for the torque involved.

Installation Notes

Secure the workpiece fully before beginning the tapping operation. Use a properly sized tap wrench rated for large-diameter taps, and apply cutting fluid throughout the operation to reduce heat and extend tool life. Advance the tap with steady, even pressure and periodically reverse to break chips, especially in blind holes. Follow applicable shop safety and machine guarding practices when performing large-diameter threading work.

Technical Specifications

• Thread Size: 3-1/2 inch
• Threads Per Inch (TPI): 8
• Tap Type: Hand Taper
• Material: High-Speed Steel (HSS)
• Weight: 6.3 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-35000-8-T-I