PAI

Plastic Engineering Solution supplies and machines Polyamide-Imide (PAI) for highly demanding applications where standard and advanced plastics reach their performance limits. We provide PAI rods, sheets, plates, and custom-machined PAI components for industrial environments involving heat, load, friction, and tight dimensional requirements.

Polyamide-Imide (PAI) is an extreme engineering plastic valued for its exceptional mechanical strength, high temperature performance, wear resistance, creep resistance, and dimensional stability under load. It is commonly used for bearings, bushings, seals, wear rings, precision machine parts, aerospace components, and high-performance industrial parts where reliability is critical.

Key Properties of PAI

Exceptional mechanical strength under load
High temperature resistance
Excellent wear and friction performance
Strong creep resistance
Good dimensional stability in precision parts
High stiffness and fatigue resistance
Reliable performance in dry-running applications
Suitable for severe-service components

These properties make Polyamide-Imide (PAI) a strong choice for components that must maintain strength, accuracy, and wear performance under heat, pressure, and continuous mechanical stress.

Applications

PAI Industrial Applications

Polyamide-Imide (PAI) components are used in high-performance applications where parts must retain strength, accuracy, and wear resistance under severe operating conditions.

High-load bearings and bushings
Seals, wear rings, and thrust washers
Aerospace and defense components
Precision machine parts
Pump and compressor components
Electrical and insulation parts
High-temperature sliding components
Dry-running wear applications

Polyamide-Imide (PAI) is suited for critical applications where heat, pressure, friction, dimensional control, and long service life are all important performance requirements.

PAI PRODUCTS OFFERED

PAI Stock Shapes

Plastic Engineering Solution supplies Polyamide-Imide (PAI) in stock shapes and machined forms for severe-service applications where strength, stability, and wear performance are critical.

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PAI Rods

(1mm - 127mm diameter)

PAI Plates

(4.75mm - 31.75mm thickness)
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PAI Tubular bar

(OD - 31mm x ID - 19mm x LT - 1220mm TO
OD - 101mm x ID - 57mm x LT - 610mm)

PAI products are typically selected for high-load, high-temperature, low-wear, and precision applications where conventional engineering plastics may not provide the required long-term reliability.

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Machining capability

PAI Machining

Polyamide-Imide (PAI) is a high-performance material that needs careful machining control because of its stiffness, strength, and use in close-tolerance applications. When machined correctly, PAI delivers excellent dimensional accuracy and long-term stability in severe-service components.

Our PAI machining capability includes:

For PAI parts, machining is planned around the final application — especially where friction, heat, pressure, and dimensional control directly affect component performance. This helps achieve clean finishes, accurate fits, and reliable operation in demanding industrial environments.

AVAILABLE GRADES

PAI Grades Supported

We support a range of Polyamide-Imide (PAI) material grades selected for high-load, high-temperature, and wear-critical applications.

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Natural PAI
Black PAI
Bearing-grade PAI
Glass-filled PAI
Carbon-filled PAI
Wear-resistant PAI grades
High-strength industrial PAI
Custom PAI grades based on application requirements

Our team helps select the right PAI grade based on load, temperature, sliding speed, friction conditions, dimensional stability needs, and expected service life.

Tolerance information

PAI Machining Tolerances

Polyamide-Imide (PAI) is often selected for precision parts, so tolerance planning is especially important during the design and machining stage.

PAI machining tolerances depend on:

  • Component geometry
  • Wall thickness
  •  Part size and complexity
  •  Bearing, bushing, or seal fit requirements
  •  Heat and load conditions
  •  Friction and wear environment
  •  Application requirements

Because PAI is used in high-performance components, tolerances are reviewed based on how the part will function under load, temperature, and movement. Tight tolerances may be achievable for precision applications, subject to design feasibility and engineering evaluation.

Detailed tolerance information can be provided during the RFQ stage.