Step Drills

RUKO Split Point Step Drills

All step drills have split points and come in three different materials.

• Step drills are available in HSS (high-speed steel), 5% cobalt high-speed steel (HSSE-Co5), and titanium nitride (TiN) coated high-speed steel.
• The spiral flutes of RUKO high-performance step drills are CBN-ground from the solid hardened form.
• Because CBN (cubical boron nitride) is a much harder abrasive than even silicon carbide or corundum, a better and sharper cutting edge is achieved without burrs.
• Because of this higher dimensional precision, these industrial step drills will last considerably longer while maintaining precise process tolerances.
• HSS-Co 5 step drills are the best choice for cutting stainless steels.
• The added titanium nitride coating increases the surface hardness to approximately 2300 HV and the heat resistance to 1100°F (600°C).

Features

What makes these step drills special?

• CBN-ground flutes without burrs mean a superior cutting edge and longer tool life
• Each step has a radially adjusted relief produced by CBN grinding, relating directly to the diameter of the step, so the cutting edge is always the highest point of the diameter
• Each step is axially CBN relief-ground, meaning the cutting edge is also the highest point of the axial cutting axis
• The cutting edge of each step has relief angle, meaning the cutting edge is also the highest point in advance direction
• The CBN-ground point ensures centering and spot-drilling, even in thin-walled material
• Point Cut: split point DIN 1412 C
• Point angle: 118°
• Step angle: 90°
• Right-hand cutting

Applications

Use High Speed Steel drills, HSS Cobalt 5 and HSS-TiN coated drills for:

• Sheet metal working in electrical, sanitary engineering, heating technologies, automotive, mechanical engineering, switching systems and aviation
• Non-ferrous metal, steel, stainless steel, thermoplastics, duroplastics, sheet metals up to 0.16” (8 ga.) thick
• Center, spot-drill, bore and debur - all in one operation