TECHNICAL TIP #34; COATINGS FOR CUTTING TOOLS:
Our group receives many questions regarding coating recommendations for different tool types in an infinite variety of materials.  Many of you have also suggested that we cover this topic in your suggestions of things for us to address.  We are preparing some future specific tips to cover this exact topic.  As a preface to those tips, we would like you to understand a couple of important fundamental things regarding high performance coatings.
1. All seemingly “alike” coatings are not alike: The performance of a TiN/TiCN/TiAlN coated tool from one coatings vendor may perform significantly different from the TiN/TiCN/TiAlN provided by another.  Our independent tests of tools from the same lot and coated by different vendors, including ourselves, revealed a performance spread of 10X when tested in identical test conditions.  In other words, in extreme cases, a drill coating from one vendor may yield 300 holes while another’s coating will yield 3,000 holes!  Consistency day to day and month to month performance is also critical for predictable results.
2. Coatings development is continuous: The process itself is constantly evaluated and improved yielding both higher productivity, changes in which coatings we recommend for which tools and workpiece material and consistency.  About every quarter, we receive updates from our R&D department for updated recommendations as well as changes in both SFM and IPR.
3. Surface feet recommendations are vital: To achieve ANY benefit from HP coatings, they must be run at significantly higher speeds.  If coated tools are run with bright tool parameters they can even be counter-productive.  Follow the manufacturers recommended starting points (which are typically conservative) and work upward from there.
You may be assured that any Kennametal-Greenfield IPG coated tool will set the standard for the highest possible performance available in the marketplace.

Tips concerning specific recommendations will follow soon in future tips!

If you suggest a topic for a future tip, and we use it, we will send you a souvenir from the Masters Golf Tournament.  To submit a topic or be removed from the list, e-mail mailto:don.dejarnette@gfii.com
You can reach Kennametal-Greenfield Technical Support by phone at 1-888-GFI-TOOL, by fax at 1-888-GFI-FAXX or e-mail at mailto:tech.support@gfii.com