Dimensions

• d1 (mm): 2.8448
• d2 (mm): 3.5
• l1 (mm): 56
• l2 (mm): 5
• l3 (mm): 18
• l4 (mm): 6
• Square Size (mm): 2.7
• z: 3
• Drill Size (mm): 2.4 (drill)
• TPI: 48 (TPI)

Specifications

• Designation: UNI (for normal general purpose type materials)
• Material: Powdered Metallurgy - Vanadium Grade High Speed Steel (PM-HSSE V3)
• Finish: Hardlube
• Max Cut Depth: 3xD
• Shank Form: Reinforced Shank (with square drive)
• Helix Angle: R50
• X: als
• Type: Spiral Flute
• Standard: DIN2184-1
• Thread Form: UNF
• Nut Tolerance: 2BX
• Lead: Form B / 4.5 x P

Applications

• Steel - Non-alloy, cast & free cutting (~ 0.15 %C): Annealed
• Steel - Non-alloy, cast & free cutting (~ 0.45 %C): Annealed
• Steel - Non-alloy, cast & free cutting (~ 0.45 %C): Quenched & Tempered
• Steel - Low alloy & cast < 5% of alloying elements: Annealed
• Steel - High alloy, cast & tool: Annealed
• Steel - Corrosion resistant & cast - Ferritic / Martensitic: Annealed
• Stainless Steel - Austenitic: Age Hardened
• Stainless Steel – Duplex
• Aluminum & Magnesium, wrought alloy - Non Heat Treatable
• Aluminum & Magnesium, wrought alloy - Heat Treatable: Age Hardened
• Aluminum & Magnesium, cast alloy ≤12% Si - Non Heat Treatable

Features

• Universal high performance tapping
• PM-HSSE V3 offers superior tool life
• Use in stainless steels and high strength steels up to 850N/mm2
• Through holes up to 3 x d1
• Suitable for synchronous tapping in machine operations