[Cl...] Posted January 14, 2019 Share Posted January 14, 2019 We have a new job heading our way, high volume, very tight tolerances of some of the dimensions ± .0002 on one diameter. Can my Contura (XXT/RDS/TL1) handle that? Link to comment Share on other sites More sharing options...
[Ri...] Posted January 14, 2019 Share Posted January 14, 2019 I'm unsure of the size of your machine, but a new Contura 7/7/6 - 7/10/6 with the XXT is spec'd at 1.7 microns. That puts you at more than 10% of your tolerance. You can probably get close, but realistically you either need a tighter spec machine or a different measuring device (laser micrometer). Oh. Depending on this size of your parts, maybe a Micura would work. They make a 5/7/5 size now with the same spec. Link to comment Share on other sites More sharing options...
[Cl...] Posted January 14, 2019 Author Share Posted January 14, 2019 7/7/6 Link to comment Share on other sites More sharing options...
[Ro...] Posted January 15, 2019 Share Posted January 15, 2019 Just get a set of class X pins 🙂 Keep them right at the machine for 100% inspection. Link to comment Share on other sites More sharing options...
[Cl...] Posted January 15, 2019 Author Share Posted January 15, 2019 That was kind of a rhetorical question. I recommended a laser micrometer for the diameter in question. One concern I have is that the quality lab where this CMM is located isn't temperature controlled very well. I'm not sure how 17-4 material is going to react in that environment? Link to comment Share on other sites More sharing options...
[Ro...] Posted January 15, 2019 Share Posted January 15, 2019 Personally not a big fan of laser mics. are you dealing with OD or ID diameter? We had a Sunnen air gage at my last shop for .0002 total tol ID, those gages were great! Link to comment Share on other sites More sharing options...
[Cl...] Posted January 15, 2019 Author Share Posted January 15, 2019 It's a .4375 +/-.0002 OD. Link to comment Share on other sites More sharing options...
[Ri...] Posted January 15, 2019 Share Posted January 15, 2019 Laser-Mics are great if used and setup properly. A lot of issues arise from not being properly fixtured. Air-gages are great, Edmunds make a great setup. If the environment isn't great for both the manufacturing or measurement, you are going to be chasing your tail. Thermal expansion co-efficient (@ 21-93°C/69.8-199°F) 10.8 µm/m°C 6.00 µin/in°F Link to comment Share on other sites More sharing options...
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