 Here are some simple quick tips when you are machining machining hard materials.
 Hard Turning Speed SFM chart based upon a material's Shore Hardness.. As the hardness increases the SFM decreases.  Some good rules of thumb for Hard Turning: The IPR Feed Rate is based upon ceramic insert nose radius and Depth of Cut (DOC)  Best choice of ceramic insert grades for use in hard turning from NTK
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Tough, Precise, and Fast —Carmex HBA carbide grade is available today for tomorrow’s materials10/21/2020  As more applications require the use of super-hard alloys, manufacturers are demanding tooling that can deliver precision threads and high production in less time. To meet these challenges, Carmex Precision Tools Ltd. has engineered carbide grade HBA — an extra-fine, submicron grade with high toughness for optimized performance on hardened steel Titanium and super alloys including Hastelloy, Inconel and Nickel base alloys up to 62 HRc. Available for internal and external threading in both 60° and 55° partial profile, as well as ISO metric and UN, HBA delivers high wear and heat resistance and excellent edge stability. The unique combination of carbide substrate, coating type and edge conditions provide superior performance over extended tool life. Case Study in Threading D2 at 53-56HRc  16mm (3/8" I.C.) LAYDOWN INSERT FOR ISO (METRIC) EXT-RH THREAD; PITCH: 01.50mm; GRADE: HBA In a recent test involving an external right-hand thread:
Hard machining is increasingly becoming the rule rather than the exception in complex part production. Carmex HBA was engineered to meet the challenges inherent in threading hard materials while delivering high production and longer tool life. Bring us your most challenging hard threading applications and lets try the new Carmex HBA engineered performance carbide . Over the years, many of our customers have come to us because they were regularly breaking taps.
This meant that the holes had to go from a depth of .150" to .190". The 2-56UN thread’s major diameter was .086", and the drill diameter .070".
Repeatability was nearly impossible on his CNC equipment, and he literally came in every Saturday to tap the holes by hand. When he started talking with us, he was breaking his taps after only 20 holes — an extraordinarily short tool life. By re-examining his technology, and switching to Carmex Precision thread milling, he was able to accomplish the threading of 683 holes with a single thread-mill on his CNC equipment. Despite the number of passes, the wear factor between the first and the last holes could only be measured in tenths, and the customer was able to get the thread detail back to its original .150" full thread depth. Perhaps just as important, his Saturdays are now “tap-free.” |
Technical Support BlogAt Next Generation Tool we often run into many of the same technical questions from different customers. This section should answer many of your most common questions.
We set up this special blog for the most commonly asked questions and machinist data tables for your easy reference. If you've got a question that's not answered here, then just send us a quick note via email or reach one of us on our CONTACTS page here on the website AuthorshipOur technical section is written by several different people. Sometimes, it's from our team here at Next Generation Tooling & at other times it's by one of the innovative manufacturer's we represent in California and Nevada. Archives
March 2023
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