Holemaker Step Drills Straight Flute (Various Sizes Available)
The Titanium Nitride coating significantly increases the tool life by providing the following benefits:
Increased surface hardness to 85HRC.
Ceramic surface, reducing friction by up to 30%.
Especially resistant to cold welding.
Suitable for cutting a wide range of materials
Specifications
SDST4-12mm
Sizes: 4, 5, 6, 7, 8, 9, 10, 11, 12mm
Step Length: 3.75mm
Overall Length: 65.5mm
Shank Diameter: 6mm
SDST4-20mm
Sizes: 4, 6, 8, 10, 12, 14, 16, 18, 20mm
Step Length: 4.0mm
Overall Length: 75.0mm
Shank Diameter: 8mm
SDST5-25mm
Sizes: 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25
Step Length: 4.0mm
Overall Length: 81.8mm
Shank Diameter: 10mm
SDST6-30mm
Sizes: 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30mm
Step Length: 3.75mm
Overall Length: 97.0mm
Shank Diameter: 12mm