Precision PPS Rods (Solid-Core Stock)
HDT > 260°C | Void-Free Solid Center | Multi-Stage Annealed for CNC Lathes
We supply high-density, void-free Precision PPS Rods engineered for high-temperature and chemical-resistant CNC turning. Manufactured to strict international quality standards and 72-hour stress-relieved, our solid-core rods feature HDT > 260°C, zero moisture absorption, and smooth lathe threading without internal porosity or cracking. Available in Natural Beige, Black, and custom modified grades (GF, CF, Wear).
Submit your required rod diameter and length below for a fast factory-direct quote.
Product information
Published information supports preliminary product selection. Confirm the exact grade, dimensions, tolerances, documentation and application suitability with the quotation for your order.
Description
Machinist Dilemma & Our Rod Solutions
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Zero Centerline Porosity
Pain Point: Low-cost thick plastic rods often hide air pockets in the center, ruining deep drilling or internal threading halfway through turning.
Our Solution: Extruded with micro-density control, guaranteeing solid-core integrity from surface to centerline. -
Warp-Free CNC Turning
Pain Point: Internal extrusion stress causes long rods to bow (“banana shape”) or crack during heavy outer diameter turning or threading.
Our Solution: 72-hour multi-stage thermal annealing relieves deep stress, ensuring true straightness and sub-micron thread precision.
Core Engineering Advantages
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Extreme Thermal Stability (HDT > 260°C
Features a Heat Deflection Temperature over 260°C (500°F) and continuous thermal service up to 220°C, far exceeding standard engineering plastics. -
PEEK-Level Chemical Inertia
Insoluble in all known solvents below 200°C. Demonstrates zero degradation when exposed to aggressive acids, alkalis, organic solvents, and superheated steam. -
High Rigidity & Dielectric Isolation
High mechanical strength and dimensional stability with intrinsic UL94 V-0 flame retardancy and high dielectric insulation for electrical components.
Engineering Limitations & Trade-offs
To ensure correct material selection for your application, please evaluate the following boundaries:
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Notch & Impact Sensitivity : Rigid and harder than Nylon or POM, but more notch-sensitive under severe dynamic shock or hammer impact. Sharp carbide CNC tools are recommended.
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Thermal Ceiling (220°C Continuous ): Reliable up to 220°C continuous. If your application requires continuous operation above 220°C, PEEK or PAI should be chosen instead.
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Oxidizing Acid Limit : Excellent resistance to most chemicals, but NOT recommended for concentrated nitric acid or concentrated sulfuric acid environments.
Target Applications
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Chemical & Fluid Valves: Acid-resistant valve plugs, rotary pump shafts, chemical sensor housings, check valve balls.
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Electrical & Electronics: High-voltage insulator pins, coil bobbins, test socket pins, transformer spacers.
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High-Temp Machinery: Thermal isolation rods, dynamic guide bushings, high-temperature rollers.
Quick Rod Order Checklist
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Rod Dimensions: Diameter (10mm to 200mm+) × Length (mm) or Cut-to-Size pieces.
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Outer Tolerance: Standard Extruded Tolerance or Precision Ground (h9 / h8 tolerance).
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Formulation Option: Unfilled Natural Beige, Black, GF30%, CF ESD, or PVX Wear-grade.
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Quantity: Number of rods or cut pieces.
Material overview
Understanding PPS (Polyphenylene Sulfide)
Why engineers use it
- Broad chemical resistance for many industrial fluids and process environments.
- Low moisture uptake and good dimensional stability.
- Useful electrical insulation and inherent flame-resistance characteristics.
- Reinforced grades can provide high stiffness and repeatable molded dimensions.
- Often offers a practical cost/performance position below PEEK.
Limits to consider
- Unfilled PPS can be relatively brittle and design details strongly affect impact performance.
- Glass or mineral reinforcement changes shrinkage, anisotropy and machining behavior.
- Oxidizing media and actual high-temperature chemicals still require compatibility review.
- Weld lines, sharp corners and molding orientation can become structural weak points.
- It should not be selected from chemical-resistance charts alone.
Grades and product forms
PPS is commonly supplied unfilled or reinforced with glass fiber, mineral filler, carbon fiber or combined systems. The filler package changes stiffness, movement, surface finish, conductivity and wear. Pellets suit volume molding, while sheet, rod or finished parts may be preferable for prototypes and lower-volume production.
Performance points to review
| Evaluation area | Why it matters | Information to provide |
|---|---|---|
| Temperature behavior | Useful performance under elevated or changing temperature | Continuous and peak temperature, cycle length and time at load |
| Mechanical response | Strength and stiffness must match the real part geometry | Load direction, stress level, impact and fatigue expectations |
| Environmental resistance | Fluids, cleaning agents and atmosphere can change service life | Chemical name, concentration, temperature and exposure time |
| Dimensional control | Tight-tolerance parts depend on both material and processing | Finished dimensions, tolerances and assembly conditions |
| Electrical or insulation needs | Electrical requirements may influence grade and thickness | Voltage, dielectric, conductivity or insulation target |
These are engineering discussion points, not guaranteed property values. Final acceptance criteria should be agreed for the selected grade, process and order.
Typical application directions
These examples show where the material may be evaluated. They do not replace a suitability review for the finished component.
Fabrication and processing preparation
Share the finished part drawing as well as the requested rod diameter and length. This makes it possible to discuss machining allowance, tolerance, cut length, quantity and whether a closer starting size could reduce waste.
Where the application is critical, define what a successful trial looks like before material is ordered: dimensions after processing, visual condition, mechanical response, assembly fit or another measurable result.
When another material may be better
PEEK may be preferred when toughness or a broader high-temperature performance margin is required. PPS can be the more practical solution when chemical resistance, stiffness, repeatable molding and cost control are the central requirements.
We recommend sharing the current material and the reason it is being reconsidered. Cost, processability, supply form and inspection burden belong in the decision alongside technical performance.
Information needed for an accurate quotation
A useful RFQ reduces follow-up questions and helps us distinguish between a material request and a finished-part requirement.
| Product form | Raw material, stock shape, semi-finished blank or completed part |
|---|---|
| Dimensions | Nominal size, finished size and tolerances |
| Quantity | Trial quantity, first order and estimated annual demand |
| Application | Part function and current material, if any |
| Operating temperature | Continuous range, peak temperature and cycle duration |
| Environment | Chemicals, gases, moisture, pressure, vacuum or outdoor exposure |
| Mechanical duty | Load, speed, impact, wear and mating components |
| Documentation | Drawing revision, inspection, traceability or compliance needs |
Frequently asked questions
Can I request a sample or trial quantity?
Trial quantities can be discussed according to product form and availability. Tell us what you need to prove during the trial, the intended process and the expected production quantity if the test succeeds.
Do you provide a data sheet or material documentation?
Available documentation depends on the selected material and supply route. List the documents required by engineering, purchasing or quality when you inquire so they can be checked before quotation.
Can the grade be selected from a product name alone?
No. Similar product names can cover different grades, colors, fillers and processes. Selection should be based on the finished application, environment and required property balance.
Can you supply custom dimensions or finished parts?
Custom sizes, blanks or finished parts can be reviewed where appropriate. A drawing with tolerances, quantity and material requirement is the best basis for quotation.
How should we evaluate an alternative to our current material?
Share the current grade, the part’s service conditions and the reason for changing it. A useful comparison looks at failure mode, processing, life, inspection and total project cost—not only a single property value.
What determines lead time?
Lead time depends on product form, grade, size, quantity, documentation, machining and current availability. Confirm the required delivery date and destination with the RFQ rather than assuming a standard schedule.
Send the drawing, application and quantity. We will use the project details to prepare a practical material and supply discussion.
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