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CNC Machining
PEEK is a semi-crystalline engineering thermoplastic with excellent mechanical and thermal properties, often used to replace metal parts. We supply PEEK CNC parts across the UK, from single prototypes to production runs.
It keeps its strength and chemical resistance at high temperatures and resists hydrolysis from steam, water and sea water. As a result it is often specified for bushings & bearings, seals & back-up rings and pump & valve parts. Its quoted tensile strength of around 103 MPa gives a useful guide when sizing parts.
Parts are CNC milled or turned and available in pale brown or black. Send us a STEP file and we will quote your PEEK CNC parts promptly, with UK-wide delivery. Finish options (as machined) can be confirmed when you order. Every order is checked against your drawing before dispatch.
Material
PEEK
Description
Strengths
Lead time 10 business days. Very strong and stiff with excellent heat and chemical resistance; can replace metal.
Weaknesses
High material cost
Pale brown / black
Ultimate tensile strength
103 MPa
Yield strength
95 MPa
Modulus of elasticity
3.95 GPa
Elongation at break
30–150%
Density
Not specified
Hardness
28.5 HV
Hydrolysis resistance
Excellent
UK equivalent
Maximum service temperature
260°C
Thermal expansion coefficient
60 × 10⁻⁶ /°C
Thermal conductivity
0.26 W/(m·°C)
Electrical insulation
Good
Post-processing
Deburring / bead blasting
Recommended finish
As machined
Bushings & bearings
Seals & back-up rings
Pump & valve parts
Medical & food machinery
Values shown are typical supplier figures for PEEK and may vary with stock condition. Please confirm critical properties before production.
Yes. PEEK machines well and is very strong and stiff. It is often annealed to relieve stresses, and careful machining avoids heat build-up.
Plastics are softer and expand more with heat than metals, so very tight tolerances and thin walls need extra care. Achievable tolerances depend on part size, geometry and features, so mark any critical tolerances on a 2D drawing with your upload and they will be reviewed and confirmed in your quote.
PEEK is usually supplied as machined, deburred or bead blasted.
Typical uses include bushings and bearings, seals and back-up rings, pump and valve parts, and medical and food machinery. It can replace metal in many parts.
Choose PEEK when the part must work continuously at high temperatures, up to about 260°C, or resist harsh chemicals while staying strong. For less demanding parts, POM-C or nylon is a much more economical choice.
The typical lead time shown for PEEK is 10 business days from an approved order. Quantity, finishing and any heat treatment can affect this, and your quote confirms the date before you order.
Parts in as fast as 10 business days
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