Guhring 9039070054860 Spiral Point Tap 12-24 Unc

Product Description

The GUHRING 9039070054860 is a spiral point tap designed for through-hole threading in 12-24 UNC applications. Built from High-Speed Steel-E-PM (HSS-E-PM) with a TiN coating, this tap handles demanding materials including stainless steel. The spiral point geometry pushes chips ahead of the cut rather than packing them into the flute, making it well suited for through-hole work where chip evacuation is critical. With 3 flutes, a plug chamfer, and an H3/H4 thread limit to a 2B class of fit, it produces consistent, in-tolerance threads in production and repair environments. Licensed machinists and toolroom technicians are the primary users.

This tap is applied in through-hole threading operations on ferrous and stainless steel workpieces. The plug chamfer style provides a gradual lead-in, making it appropriate for both CNC tapping centers and hand-tapping operations where starting alignment is controlled. The 12-24 UNC thread form is common in light mechanical assemblies, electrical enclosures, and instrumentation hardware. The TiN coating reduces friction and extends tool life in abrasive or work-hardening materials such as austenitic stainless steel.

Key Features

• Spiral point geometry pushes chips forward, optimized for through-hole threading
• HSS-E-PM substrate provides toughness and wear resistance in stainless steel and hard alloys
• TiN coating reduces friction and extends tool life in abrasive materials
• Plug chamfer allows controlled lead-in for both machine and hand tapping
• H3/H4 thread limit produces 2B class of fit threads for standard fastener compatibility
• Right-hand cut, no coolant-through, non-oversize, uninterrupted thread form

Compatibility

Designed for through-hole threading of 12-24 UNC fastener holes in stainless steel and similar materials. Series 3907 from GUHRING. Verify tap holder and machine spindle compatibility with the 0.220 inch shank diameter before installation.

Installation Notes

Installation is performed by machinists using a tap handle, tapping head, or CNC rigid-tapping cycle. Ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill diameter for 12-24 UNC before threading. Apply a suitable cutting fluid or tapping compound rated for stainless steel to protect the coating and improve thread quality. Inspect the tap for wear or chipping before each use; a damaged tap can produce out-of-tolerance threads or break in the hole.