1. Cutting tool
Since Krefine PEEK ESD grades are filled with carbon materials, tool abrasion should be taken into consideration. Abrasion resistant steel is desirable for tool, hard metal must be used. High speed Titanium coating is recommended.
Revolution speed is one of the most important factors for drilling. Suitable revolution speed can give high precision machining without flash. The normal revolution speed is from 5000 tó 10000 r.p.m and the drill movement speed is
about from 50 to 150mm/min.
3. Cutting speed
When machining Krefine PEEK ESD grades, the cutting speed should be lowered (200mm/min).
4.Example of drilling
Table 1 shows the example of drilling conditions for 0.56mm hole diameter and 0.8mm between center ofholes applicable to Krefine PEEK ESD grade, EKH-SS11. Figure 1 shows picture after drilling.