Ceramic Milling Tips

Ceramic insert cutters like the one in this application run 8 to 10 times faster than carbide.

Ceramic milling tips.

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. 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. This is an excellent vehicle to generate the high temperatures that make ceramic inserts perform optimally. For some shops the flexibility of inserted carbide cutting tools might be too much of a good thing.

Milling macor speeds and feeds. Depths of cut are as for turning. These grades may have a metallic binder to improve their toughness. We still run older mitsui seiki horizontal mills and older mori seiki lathes because they are so rigid.

How to mill macor. Another group of grades are the high content cbn grades with 85 to almost 100 cbn. Maybe that s 3 but i m going to call it one. Machining with ceramic end mills at high temperatures can affect the outermost layer of the machined material therefore a final machining allowance must remain.

Cbn is brazed onto a cemented carbide carrier to form an insert. Carbide is safe and easy to use says steven howard engineering and marketing manager for ntk cutting tools. The ceramic binder adds wear resistance to the cbn which is otherwise prone to chemical wear. Do not use open type machines the chips generated during machining are at extremely high temperatures.

23 to 35 sfpm 1 to 1 4 meters per minute. Hard turning and milling turning is an almost ideal operation for ceramics. Ceramic inserts cutter for roughing hrsa ceramic milling typically runs at 20 to 30 times the speed of carbide although at lower feed rates 0 1 mm z 0 0039 in z which results in high productivity gains. Climb milling prevents material being pulled off the edge of the macor.

Ensure the inside of the machine is free from any combustible materials. Typical head speeds are 1000 1500 rpm with a chip load of 0 05mm per tooth. 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. Due to intermittent cutting it is a much cooler operation than turning.

Machine rigidity fixture rigidity and tooling rigidity.