Descriptions

• Three Flute Countersink 90°, DIN 335
• Countersinking / Counterboring screw holes
• For Countersunk screws acc. to DIN 963, 964, 965, 966, 7513, 7516
• For Countersunk screws acc. to ISO 2009, 2010, 7046-1, 7046-2, 7047
• Chamfering of tapping holes

Dimensions

• d1 (mm): 6.3, 10.4, 16.5, 20.5
• Pack Quantity: 4

Features

• For use in machine applications
• Type N - For non-ferrous, Type UNI - For difficult to machine materials

Specifications

• Designation: N
• Material: High Speed Steel-Cobalt
• Finish: Bright
• Shank Tolerance: h9
• Standard: DIN 335
• Point Type: 90°

Applications

• Optimal for Steel - Non-alloy, cast & free cutting (~ 0.15 %C)- 125 HB
• Optimal for Steel - Non-alloy, cast & free cutting (~ 0.45 %C)- 190 HB
• Optimal for Steel - Non-alloy, cast & free cutting (~ 0.45 %C)- 250 HB
• Optimal for Steel - Non-alloy, cast & free cutting (~ 0.75 %C)- 270 HB
• Optimal for Steel - Low alloy & cast < 5% of alloying elements- 180 HB
• Optimal for Steel - Low alloy & cast < 5% of alloying elements- 275 HB
• Optimal for Stainless Steel – Austenitic- 180 HB
• Optimal for Stainless Steel – Duplex- 250 HB
• Optimal for Cast Iron, Grey (GG) - Ferritic / Pearlitic- 180 HB
• Optimal for Cast Iron, Nodular (GGG) - Ferritic- 160 HB
• Optimal for Cast Iron, Nodular (GGG) – Pearlitic- 250 HB
• Optimal for Aluminum & Magnesium, wrought alloy - Non Heat Treatable- 60 HB
• Optimal for Aluminum & Magnesium, wrought alloy - Heat Treatable- 100 HB
• Optimal for Aluminum & Magnesium, cast alloy ≤12% Si - Non Heat Treatable- 75 HB
• Optimal for Aluminum & Magnesium, cast alloy ≤12% Si - Heat Treatable- 90 HB
• Optimal for Copper & Copper alloys (Brass/Bronze) - Free cutting, Pb > 1 – 110 HB
• Optimal for Cast Iron – Chilled – 400 HB