PEEK (polyether ether ketone)

Uniquely Kashima

PEEK (polyether ether ketone)1 PEEK (polyether ether ketone)2 PEEK (polyether ether ketone)3

PEEK is a material with special features which make it very popular for plastic bearings. 

(See tables below.)

Overview of PEEK

PEEK is a crystalline thermoplastic. It is a type of special, synthetic aromatic-polyetherketone.

PEK (polyetherketone) has a basic straight chain-structure consisting of alternating ether and ketone bonds.

PEEK (polyetheretherketone) is created by inserting another ether molecule into the chain.

This gives it a very high heat-resistance, excellent fatigue-resistance, tough abrasion-resistance, strong dimensional stability, as well as terrific chemical-resistance.

It also offers excellent insulation and radiation-resistance, but it is a fairly pricey material.

Features of PEEK

Highly Recommended   Recommended
Not Recommended  × Do Not Use

Material Call
symbol
Dry Irregular
moisture
In water /
In sea-water
Vapor Chemical Non-
magnetic
Insulating
Acid Alkali Organic
solvent
Oil
PEEK PK
PKG ×

NOTE: For chemicals, please consult us regarding the type and concentration, etc. of such.

Temperature Resistance of PEEK

Best Recommended   Highly Recommended   Recommended 
Not Recommended  × Do Not Use

Material Call
symbol
Temperature
-190℃~ -100℃~ -50℃~ -20℃~ Room
temperature
~60℃
~120℃ ~200℃ ~350℃
PEEK PK × × ×
PKG × × ×

NOTE: the shape of the bearing will change due to such temperatures.

For more information about tolerances and other issues, download a catalogue from here.

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