PPSU CNC Machining | Medical Sterilizable Plastic Parts

Polyphenylsulfone (PPSU) — commonly known as Radel® R — is a high-performance thermoplastic prized for its outstanding impact resistance, steam sterilizability, and biocompatibility. It is the material of choice for medical devices, surgical instruments, and aerospace interiors.

PPSU Material Properties

PPSU CNC Machining Capabilities

• Tolerances: +/-0.01mm achievable
• Processes: 5-axis milling, CNC turning, drilling, tapping, threading
• Surface finish: Ra 0.8 µm as-machined
• Certifications: ISO 9001, material traceability to mill cert

PPSU vs PEEK vs PSU

PPSU Industry Applications

• Medical: Surgical instrument handles, sterilization trays, dental devices, orthopedic trial implants
• Aerospace: Interior cabin components, galley parts, air ducts (FAR 25.853 compliant)
• Pharmaceutical: Fluid handling manifolds, connectors, lab equipment
• Food Processing: FDA-compliant components requiring repeated sanitation

PPSU CNC Machining FAQ

Can PPSU be autoclaved?

Yes. PPSU withstands over 1,000 steam autoclave cycles at 134°C without significant degradation, making it the best plastic for repeated sterilization.

Is PPSU biocompatible?

Yes. PPSU meets USP Class VI and ISO 10993 standards for medical device biocompatibility.

How does PPSU compare to PEEK cost-wise?

PPSU is typically 40-50% less expensive than PEEK. For applications under 180°C that need impact resistance and repeated sterilization, PPSU is the superior choice.

See our medical industry solutions and PSU machining case study.

Need PPSU CNC machined parts? Upload your drawing for a quote. ISO 9001 certified. Medical and aerospace specialists.

PPSU Design Guidance for Sterilizable Plastic Parts

PPSU is a practical choice when a medical, dental, laboratory, or food-processing component needs repeated steam sterilization, impact resistance, and better cost control than PEEK. In CNC machining, PPSU usually performs well when the design avoids very thin snap features and sharp internal corners. For reusable trays, handles, manifolds, and housings, we recommend adding radii where stress concentrates and keeping screw bosses supported by enough wall thickness.

For buyer evaluation, the key question is not only whether PPSU can survive autoclave cycles, but whether the machined geometry will remain stable after repeated cleaning, assembly, and handling. We can review 2D and STEP files for wall thickness, threaded inserts, sealing faces, and inspection points before production.

Common PPSU CNC Machining Requirements

• Medical and dental parts: trays, handles, trial components, instrument supports, and sterilizable covers.
• Food and pharmaceutical equipment: manifolds, connectors, wear pads, and inspection fixtures.
• Recommended drawing notes: critical dimensions after machining, surface finish expectations, and any cleaning or packaging requirements.
• Typical tolerance: +/-0.05 mm, with tighter features reviewed case by case based on geometry.

For higher temperature or load requirements, compare PPSU with PBI CNC machining and PEEK CNC machining. For medical components, see our medical plastic machining capability page.

PPSU Quote and Manufacturing Checklist

For PPSU parts, please share the sterilization method, target quantity, color requirement, assembly environment, and any regulatory notes from the end application. If the part is a tray, handle, manifold, or device housing, we also check whether engraving, threaded inserts, edge deburring, or individual bagging is required. These details help us quote the correct machining process instead of treating PPSU as a generic plastic block.