Machining Guidelines - Compression Molded TECAPEEK

TECAPEEK polymer compounds can be machined with conventional metal working tools. A high degree of precision can be obtained by using moderate cutting speeds and fast feed rates with carbide-tipped machine tools.

During the machining of TECAPEEK polymer materials, stresses may build up within the material by localized heating at the cutting point. Therfore, if a large amount of machining is to be done, a second annealing procedure may be required.

The thermal conductivity of polymers is lower than steel, so heat build-up during machining is rapid. A cooling fluid should be used to remove some of the heat generated by machining. Water is generally reccommended for use with all TECAPEEK compounds.


  Units Unfilled Reinforced
Turning Cutting Speed ft./min. 984 394-590
Feed in./rev. 0.016 0.008
Relief Angle degrees 5 5
Top Rate Angle degrees 6-12 6-12
Cutting Depth in. 0.25 0.29
Coolant   none none
Milling Cutters   carbide carbide or
diamond tip
Cutter Speed ft./min. 590-754 256-361
Coolant   water/oil water/oil
Drilling Cutting Speed ft./min. 394 246-394
Feed in./rev. .002-.008 .002-.008
Lip Angle degrees 118 118
Clearance Angle degrees 12 12
Coolant   water/oil water/oil
Reaming Runners   Spiral Fluted Spiral Fluted
Speed rev./min. 100-200 100-200
Coolant   water/oil water/oil


Annealing should be done in a forced air oven capable of reaching temperatures of 450 degress Fahrenheit. Before annealing, parts must be dried 3 hours at 300°F. Allow parts to heat up at a rate of 20°F per hour to 450°F. Allow to soak at this temperature for a minimum of 4 hours or 6 hours per 1" cross section. Allow parts to cool at 20°F per hour to ambient temperature. Let parts stabilize in temperature 24 hours before finishing machining.