Guhring 9039380041660 Machine Tap 8-36 Unf Cobalt

Product Description

The GUHRING 9039380041660 is a straight-flute machine tap designed for cutting 8-36 UNF internal threads in blind holes and through-holes. Built from cobalt high-speed steel with a FIREX coating, it handles abrasive materials and cast iron where standard HSS taps wear prematurely. The modified bottoming chamfer allows threading close to the bottom of a blind hole while still providing enough lead-in for reliable thread engagement. With 3 flutes and a Class 2B fit, this tap produces threads suited to standard fastener tolerances. Overall length is 2.125 inches, and the tapping depth reaches 0.827 inches. Shank diameter is 0.168 inches, and the drive square measures 0.131 inches. Thread direction is right-hand.

This tap is intended for machine tapping operations on CNC machining centers, knee mills, and drill presses equipped with a tapping head or rigid tapping cycle. It is well suited for production work in cast iron and abrasive materials where tool life is a priority. The straight-flute design works in both blind-hole and through-hole applications. The H2 and H3 thread limits provide flexibility for plated or close-tolerance assemblies. Typical users include machinist shops, maintenance departments, and production facilities requiring consistent 8-36 UNF thread quality.

Key Features

• Cobalt HSS construction with FIREX coating for extended tool life in abrasive materials and cast iron
• Modified bottoming chamfer for threading close to the bottom of blind holes
• 3-flute straight-flute geometry supports both blind-hole and through-hole threading
• Class 2B fit with H2 and H3 thread limits for standard and close-tolerance assemblies
• Right-hand 8-36 UNF thread form at 36 threads per inch
• No coolant-through design — compatible with flood coolant or cutting oil applied externally

Compatibility

Designed for machine tapping of 8-36 UNF threads in blind-hole and through-hole applications in abrasive materials and cast iron. Fits standard tap holders accepting a 0.168-inch shank diameter with a 0.131-inch drive square.

Installation Notes

This tap is intended for use by machinists operating machine tapping equipment; it is not designed for hand tapping. Power down and secure the workpiece before tool changes. Use a cutting fluid or tapping oil appropriate for the workpiece material to reduce heat and improve thread finish. Verify spindle direction and speed are set for right-hand tapping before starting the cycle.