CNC Turned PEEK Bushing High Temperature 260C Chemical Resistant 25mm Bore

This PEEK bushing is machined from PEEK natural (PEEK 450G) to ±0.02mm in the critical dimensions, then finished by Turned Ra 1.6μm annealed. It is produced on CNC turning centres that are dedicated to small and medium volume precision work, so every dimension on the drawing is generated by the machine rather than by hand fitting. Typical users are engineers who have already been let down by a supplier that quoted a tolerance it could not hold, and who need the part to fit the first time without sorting or rework on the assembly line.

• High Continuous Temperature: PEEK 450G holds mechanical properties at 260 degrees C continuous, well beyond PTFE and nylon limits
• Chemical Resistance: Unaffected by most solvents, fuels and hydraulic fluids while remaining dimensionally stable
• Annealed For Stress Relief: Bushings are annealed after turning so bore size does not creep in service
• Low Wear Against Steel: Self lubricating compound keeps wear low on unhardened shafts without external grease
• Machined Bore To H7: Bore is finished to H7 with a plug gauge check to control running clearance directly

The process route is fixed before metal is cut. Bar stock is verified against the purchase specification and the heat number is logged, then a first article is turned and measured in full. Only after the first article is signed off does the lot run. Critical features on this PEEK bushing are controlled to ±0.02mm with a process capability target of Cpk 1.33 or better, and the operator checks the feature at a defined frequency with the gauge stated on the control plan. Where the drawing calls for Turned Ra 1.6μm annealed, the finishing step is carried out in house and the result is measured, not assumed. Sample parts go to the CMM for full dimensional verification, and the recorded results ship with the lot as a first article inspection report in PPAP level 3 format when a customer program requires it.

Questions are handled by engineers rather than by sales staff. Our team reviews each drawing for manufacturability, flags features that would drive cost without adding function, and proposes the tolerance band that actually matters for the assembly. That review is free and is returned within 24 hours together with a quotation. When a part fails in the field, we ask for the sample back, section it if needed and report what the failure mechanism was, because a supplier that cannot explain a failure cannot prevent the next one.

• Machines: 50+ CNC units including Swiss type lathes, 3, 4 and 5 axis machining centres and turn-mill centres from Citizen, Star, Doosan and Mazak.
• Quality lab: CMM, 2D vision measurement, roughness tester, hardness tester, salt spray chamber and spectral analyser for material verification.
• Team: 15+ mechanical engineers covering DFM review, process design, fixture design and failure analysis.
• Capacity: 500,000+ precision turned parts per month with stable output and on time delivery tracking.
• Quality system: ISO 9001:2015 certified, SGS audited, material traceability from mill heat to finished part.
• Export experience: parts shipped to 30+ countries across North America, Europe, Japan, Korea and Southeast Asia.

Semiconductor wafer handling, autoclave and sterilization equipment, downhole tooling, compressor piston shoes and high temperature conveyor bearings.

Parts are degreased, dried and packed so that the surface finish specified above arrives intact. Standard packing is VCI paper or individual PE bag, a partitioned foam tray for form features, and an export grade corrugated carton on a pallet, with the lot number and heat number marked on the outside. Parts are warranted against material and workmanship defects for 12 months from delivery. If a part is found outside the drawing, we replace it at our cost and we pay the return freight for the defective lot. Third party inspection by SGS, BV or TUV can be arranged before shipment at your request, and we work under NDA where drawings are confidential.

Q: Does PEEK need annealing after machining? A: Yes. Machining leaves residual stress that relaxes at temperature. We anneal finished bushings in a controlled ramp so the H7 bore stays in tolerance after the first thermal cycle.

Q: Can you add carbon fibre or glass fibre filled PEEK? A: We machine 30% carbon filled, 30% glass filled and bearing grade PEEK. Filled grades give higher stiffness and lower wear but reduce impact strength.

Q: What clearance do you recommend for a 25mm bore? A: For a steel shaft at 260 degrees C we normally open 0.05 to 0.08mm total diametral clearance. Send the mating shaft tolerance and temperature and we will confirm.

Q: How is PEEK priced compared to PTFE? A: PEEK stock is roughly three times the cost of PTFE per kilogram, but the higher strength and wear resistance often allow a thinner wall and a longer service life.

Q: How do you confirm the PEEK natural material before it is machined? A: Every bar is checked against its mill certificate with an optical emission spectrometer before it goes to a machine. If the chemistry does not match the grade, the bar is rejected and returned. The certificate for your lot is filed under the heat number and can be sent with the shipment or on request.

Q: What happens if a delivered part measures outside the ±0.02mm tolerance? A: Send the measurement and the lot number. We check the recorded values for that lot, replace the parts at our cost and cover the return freight. Because each critical feature is recorded during production, we can trace the deviation to a tool wear step, a fixture shift or a gauge issue and correct the process before the next lot runs.

Send a 2D drawing, a STEP file or a sample and you will have a manufacturability review and a firm quotation within 24 hours. Trial orders from a single piece are accepted, so the tolerance claim can be checked on your own assembly before a production order is placed.