Roland DGA now has diamond coated end mills for the DWX-30 and DWX-50 mills. The diamond coated tools are specifically for zirconia cutting and last much longer than standard carbide tooling.
The tools are available in .8, 1 and 2mm sizes and the retail price is US$170 each.
DWX users in North America can order the new tools from their reseller or from the Roland online store: http://www.rolanddgastore.com - Your source for genuine Roland parts, supplies and media
0.8 mm Diamond Coated Ball End Mill Part #: ZDB-40D-US
1.0mm Diamond Coated Ball End Mill Part #: ZDB-50D-US
2.0mm Diamond Coated Ball End Mill Part #: ZDB-100D-US