M35 Cobalt Step Drill 4-12/4-20/4-32mm High Speed Steel Drill Bits Spiral Groove Triangle Shank for Stainless Steel 1Pcs(4-12mm)

Hole Enlarging Drill BitsSpecification:4-12 mm (4, 5, 6, 7, 8, 9, 10,11,12mm)4-16.5 mm (4, 6, 8, 10, 12, 14, 16.5mm)4-20 mm (4, 6, 8, 10, 12, 14, 16, 18, 20mm)4-32 mm (4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32mm)Main Functions Of Product:M35 cobalt step drill (HSS Co) is a high hardness step drill bit that is mainly applied for drilling high hardness steel, such as, the stainless steel plane and hardened steel. M35 step drill bit can be utilized to drill holes in the stainless steel plane.The following points that you need to pay attention to:You can use the hand drill and bench drill to drill holes in the stainless steel plane. Use the hand drill for the board whose thickness is within 1 mm/0.04 in, while use the bench drill for the board whose thickness is about 2-3 mm/0.08-0.12 in;The drilling speed can't be too fast on the stainless steel plate. Hundred rpm is enough.Please add the water or cutting to cool down during the processing so as to extend the service life of the drill bits.

• Hole Enlarging Drill Bits
• 【See the second picture of the variant for detailed parameters】
• 【See the second picture of the variant for detailed parameters】