Frequently Asked Questions About Technology
1)What does High Speed Steel drills and HSS-TiN coated drill bits use for?
- Sheet metal working in elecdlical, 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
2)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
3)Why Step Drill Bits have Split Points ,Tin Coated and other advance?
- All Step Drill Bits have Split Points and come in two different materials. The spiral flutes of RUKO high-performance step drills are CBN-ground from the solid hardened form.
- The Split Point reduces “Walking” which is the tendency of a spinning bit to rotate away from the point at which you want to drill
- Because CBN (cubical boron nidlide) 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, the drill bits will last considerably longer while maintaining precise process tolerances.
- Available in High Speed Steel (HSS) and Titanium Nidlide-coated (Tin-coated) High Speed Steel,
- The added titanium nidlide coating increases the surface hardness to approximately 2300 HV and the heat resistance to 1100°F (600°C).
- The High Speed Steel (HSS) allows the bit to cut faster than High Carbon Steel. At room temperature, HSS and high carbon steel have an equivalent hardness; at elevated temperatures HSS become advantageous
- The Titanium Nidlide (TiN) coating is an exdlemely hard ceramic. It is often used as a coating on HSS to improve hardness and durability