Ceramic Milling Tips

Machine rigidity fixture rigidity and tooling rigidity.

Ceramic milling tips.

Under the spk brand ceramtec offers a unique program in terms of scope diversity and performance of indexable inserts made of ceramic cutting materials polycrystalline cubic boron nitrides cbn and cermets for turning grooving milling and boring in a wide variety of industrial applications. The ceramic binder adds wear resistance to the cbn which is otherwise prone to chemical wear. I have used a white colored ceramic called macor which can be machined even with hss tools although it does wear them away a bit faster. If you can t machine the original ceramic parts which may take ages and simply wear out grinding tips is it possible to replace the original ceramic inserts with another ceramic that can be machined.

Carbide is safe and easy to use says steven howard engineering and marketing manager for ntk cutting tools. Machining with ceramic end mills at high temperatures can affect the outermost layer of the machined material therefore a final machining allowance must remain. Top 7 tips on machining inconel hastelloy monel and other nickel alloys. Due to intermittent cutting it is a much cooler operation than turning.

Depths of cut are as for turning. We still run older mitsui seiki horizontal mills and older mori seiki lathes because they are so rigid. How to mill macor. Do not use open type machines the chips generated during machining are at extremely high temperatures.

Maybe that s 3 but i m going to call it one. Hard turning and milling turning is an almost ideal operation for ceramics. Ceramic insert cutters like the one in this application run 8 to 10 times faster than carbide. This is an excellent vehicle to generate the high temperatures that make ceramic inserts perform optimally.

In general it is a continuous machining process that allows a single insert to be engaged in the cut for relatively long periods of time. These grades may have a metallic binder to improve their toughness. Always use water cooling when grinding macor. Cbn is brazed onto a cemented carbide carrier to form an insert.

Climb milling prevents material being pulled off the edge of the macor. 23 to 35 sfpm 1 to 1 4 meters per minute. Milling macor speeds and feeds. Another group of grades are the high content cbn grades with 85 to almost 100 cbn.

Ensure the inside of the machine is free from any combustible materials.