Guhring 9039100127000 Spiral Flute Tap 1/2-13 Unc

Product Description

The GUHRING 9039100127000 is a spiral flute tap designed for blind hole threading in demanding materials, including aerospace alloys and stainless steel. It carries a 1/2-13 UNC thread form with a modified bottoming chamfer, allowing threads to be cut close to the bottom of a blind hole. The tap is manufactured from powdered metal and finished with a TiN coating to extend tool life and reduce friction in tough alloys. At 3.381 inches overall length with a 40-degree helix angle, it is well suited for fast chip evacuation in deep or interrupted cuts. Installation is performed by licensed machinists or toolroom technicians in CNC or manual tapping operations.

This tap is applied in blind hole threading operations where access to aerospace alloys and stainless steel requires aggressive chip removal. The fast flute style and 40-degree helix angle pull chips up and out of the hole efficiently, reducing the risk of chip packing. The 2B class of fit and H5/H6 thread limit ensure the finished thread meets standard tolerance requirements for interchangeable fastener applications. It is a single-piece tool sold individually and is appropriate for production environments where consistent thread quality in difficult materials is required.

Key Features

• Modified bottoming chamfer for threading close to the bottom of blind holes
• 40-degree helix angle with fast flute style for efficient chip evacuation in aerospace alloys and stainless steel
• TiN coating reduces friction and extends tool life in abrasive materials
• Powdered metal construction provides improved wear resistance over standard HSS
• 2B class of fit with H5/H6 thread limit for standard interchangeable thread tolerance
• Right-hand flute and right-hand thread, no coolant-through requirement

Compatibility

Rated for use in aerospace alloy and stainless steel workpiece materials. Produces 1/2-13 UNC right-hand internal threads in blind hole applications. Series 3910 product line.

Installation Notes

This tap is installed and operated by machinists in CNC machining centers or manual tapping fixtures. Always secure the workpiece and confirm spindle alignment before engaging the tap to prevent thread distortion or tool breakage. Power down and lock out the machine before changing tooling. Follow the tooling manufacturer and applicable shop safety procedures when working with carbide and coated cutting tools.