- Black oxide improves lubricity, resists corrosion, and resists
flaking. It helps prevent buildup and welding of material on the tool’s cutting
edge when machining iron and steel.
- Chromium nitride (CrN) is a
hard, low friction coating that improves edge sharpness and helps prevent
buildup of material on the tool’s cutting edge. It is suitable for machining
aluminum, copper, and steel.
also called amorphous diamond, is a thin layer of diamond applied to the
substrate in non-crystalline form. It reduces friction and abrasion while offering
higher hardness properties than TiAlN and TiN. It is suitable for machining
aluminum alloys and stainless steel.
- Gold oxide is a low-temperature heat
treatment that reduces grinding stress within the tool.
- Hard coat
anodized with PTFE (polytetrafluoroethylene) is a hard finish with low
friction, suited for working with difficult-to-machine materials like stainless
steel, which form long chips.
offers increased durability and abrasion resistance, and retards the tendency
of softer materials to load or cling onto the tool. It is suitable for
machining abrasive materials such as cast iron.
- Nitride/black oxide
combines all the benefits of nitride, including increased durability, with the
lubricity of black oxide.
aluminum nitride (TiAlN) resists heat better than TiN, increasing
tool life and performance. It also offers increased hardness compared to TiN
and, at high cutting speeds, may reduce the need for lubricants based on the
application. It is suitable for machining titanium, nickel-based alloys, cast
iron, and stainless steel.
nitride (TiN) combines hardness and low friction to extend
cutting tool life and permit faster cutting speeds than uncoated tools. It is suitable
for machining alloy steel, carbon steel, plastic, and aluminum.
- Uncoated (bright)
tools have no finish or coating. They are a common choice for general-use