HSS CO high speed steel Cobalt Step drill bits set 3 4 12 4 20 4 22 4 32 6 24 6 35 step drill

Product Name: HSSCO M35 Cobalt Drill bit

Material: HSSCO high speed steel Cobalt

Size: 3-12mm, 4-12mm, 4-20mm, 4-22mm, 4-32mm, 6-24mm, 6-35mm

Flute: Straight Flute, Spiral Flute

Shank: Triangle Shank, Hex Shank

Application: high hardness drill bits, drilling on high hardness steel such as stainless steel etc.

When working on slim stainless steel, please pay attention for below details:

*If using electric hand drill, can work on 1mm stainless steel, if using bench drill, can work on 2-3mm stainless steel.

*Working on stainless steel, the RPM can't be very quick, hundreds is ok.

*When working, better to add cutting fluid, that will extend the working life of drills.