PEEK Machining Overview

PEEK is a high-performance, semi-crystalline, high-temperature material. Besides PEEK Virgin, the most commonly modified PEEK material is, PEEK GF30, PEEK CF30, and Bearing Grade PEEK.

PEEK shows the properties of high mechanical strength and high stiffness. Especially for the glass and carbon fiber filled PEEK, the fiber enhanced the elasticity modulus which means makes the reinforced plastic more stiffness. So the proper machining and heat treatment process must be needed to avoid machining failure.

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PEEK Machining Guide

PEEK Sawing

Material	Rotate Speed [rpm]	Circular Pitch
PEEK Virgin	3000	20~24
PEEK Modified	2400~2800	20~24

PEEK Drilling

Material	Number of Teeth	Helix Angle	Approach Angle	Cutting Speed [rpm]	Feed Force [mm/r]
PEEK Virgin	Z2	25	90	50~200	0.1~0.3
PEEK Reinforced	Z2	25	100	80~100	0.1~0.3

Note: Only for Keward Plastics. Fro PEEK GF30, PEEK PVX, when the diameter is larger than 60mm, the material should be pre-heated.

PEEK Milling

Material	Number of Teeth	Cutting Speed [rpm]	Feed Force [mm/r]
PEEK Virgin	Z2~Z4	250~500	0.1~0.45
PEEK Reinforced	Z2~Z4	80~150	0.05~0.4

PEEK Turning

Material	Relief Angle	Approach Angle	Corner	Cutting Speed [rpm]	Feed Force [mm/r]
PEEK Virgin	6~8	0~5	45~60	250~500	0.1~0.5
PEEK Reinforced	6~8	2~8	45~60	80~150	0.1~0.5

Note: Only for Keward Plastics.

PEEK Heat Treatment

Material	Heating	Keeping	Cooling
PEEK	3h heating to 120℃, then 4h heating to 220℃	1.5h/10mm thickness	cooling to 40℃ at speed of 20℃/h

Note: Only for Keward Plastics. The heat treatment above is a rough numbers, and only suit for the components which the thickness is less than 50mm. If the thickness is larger than 50mm, Please Send Us Email.