RUKO HGB-DIN352-HSS-60°-7/8 UNC spiraalboor, HSS, 7/8 inch - 9 TPI

Cutting internal UNC threads in through holes often leads to broken taps, poor thread quality, or excessive tool wear. The RUKO HGB-DIN352-HSS-60°-7/8 taper tap solves this by combining high-speed steel, a 60° thread angle, and a tapered lead to start threads easily and cut smoothly.

Who is it for

Machinists, metalworkers, and maintenance technicians who need reliable thread cutting in steel, non-ferrous metals, and cast iron. Suitable for manual or machine tapping in through holes.

Main features

• High-speed steel (HSS) for durability and heat resistance
• DIN 352 standard, UNC thread form with 60° angle
• Taper tap (Vorschneider) design for easy starting
• Straight flutes, 4 flutes for efficient chip evacuation
• Right-hand cutting direction
• Bright uncoated finish

Specifications

• Material: High-Speed Steel (HSS)
• Standard: DIN 352
• Thread Type: UNC (Unified National Coarse)
• Nominal Diameter: 7/8 inch
• Threads Per Inch (TPI): 9
• Thread Angle: 60°
• Tap Type: Taper Tap
• Flute Type: Straight Flute
• Number of Flutes: 4
• Cutting Direction: Right-hand
• Surface Finish: Bright (Uncoated)
• Overall Length: 115 mm
• Thread Length: 35 mm
• Shank Diameter: 14 mm
• Square Size: 11 mm
• Tolerance Class: 2B
• Recommended Core Hole Diameter: 19.05 mm (3/4 inch)

Tips

Use a suitable cutting fluid and ensure the core hole is drilled to the recommended diameter. For deeper holes, consider a plug or bottoming tap after the taper tap.