ever been. For example, Radiac’s CSS Ultra uses a ceramic AlO grain in a higher strength vitrified bond for a wide range of cylindrical OD and thread grinding applications. For ex- ample, Prokipchak says they’ve observed a 50% improve- ment over traditional AlO wheels in grinding a 58–62 Rockwell crankshaft main bearing. Another case study shows thread grinding on taps (in M6 tool steel) using a Reishauer machine. The CSS Ultra wheel reduced dressing by 30% and achieved a 15% savings in cycle time.” Prokipchak also makes the point that because superabrasives are so much more expensive than AlO wheels, you “need to push the wheel to the max to get a satisfactory payback, and that requires a very robust machine.”


“A 16 × 1 × 5" [405 × 25 × 125 mm] Strato Ultra wheel AlO might cost about $110. A 16 × 1 × 5 vitrified CBN wheel would be up at around $8000–$8500. Maybe you’d use a smaller CBN wheel for the same job, but you get the idea. If you have a high-volume part and you can dedi- cate machine time to that one setup, vitrified CBN is the way to go. But if you have to switch between numer- ous parts with various forms on that


machine, vit CBN is probably not the optimum solution be- cause you’d need a different vit CBN wheel for each shape you need to grind. It’s not cost effective to change the form in a vit CBN wheel.”


Sharpening your cutting edge.


?


Asahi Diamond America Inc. 513-759-5222 / asahidia.co.jp/eng/


Meister Abrasives 888-634-7837 / meister-abrasives.com


Noritake Co. Inc.


800-688-8234 / noritake-abrasive.com Radiac


800-851-1095 / radiac.com November 2016 | AdvancedManufacturing.org 69 walter-tools.com/us


Why not take your technology to the next level? It’s easy with solutions that are leaps ahead of the standard. That’s because each of our innovations represents our collective experience and engineering expertise - just what‘s needed to boost your productivity and your cutting edge.


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