Cast Nylon Tube is produced by casting caprolactam. This PA6G tube — also supplied as cast nylon pipe or nylon tubing — has low internal stress, high crystallinity, and better wear resistance than extruded nylon tube. Standard outer diameters run from 50 mm to 400 mm. Standard length is 1000 mm. Continuous operating temperature is -40 °C to 90 °C. Natural (ivory) and black are stock colours.
Applications
- Plain bearing sleeves and bushings
- Roller covers and idler sleeves
- Chemical-resistant pipe liners
- Food processing machinery guides
- Electrical insulation sleeves
- Marine rudder bushings and wear rings
Dimensional Range
| OD (mm) |
ID (mm) |
Wall thickness (mm) |
OD Tolerance |
ID Tolerance |
Length |
| 50, 60, 80, 100 |
30, 40, 50, 60 |
10 – 25 |
±0.5 mm |
±0.5 mm |
1000 mm |
| 120, 150, 200 |
70, 100, 120, 140 |
20 – 50 |
±1.0 mm |
±0.8 mm |
1000 mm |
| 250, 300, 400 |
150, 200, 250, 300 |
30 – 75 |
±1.5 mm |
±1.0 mm |
1000 mm |
Technical Specifications
| Property |
Value |
Test Method |
| Material |
PA6G (Cast Nylon) |
— |
| Density (g/cm³) |
1.15 – 1.16 |
ISO 1183 |
| Water absorption (23 °C, 24 h, %) |
0.6 |
ISO 62 |
| Tensile strength (MPa) |
80 |
ISO 527 |
| Flexural modulus (GPa) |
3.0 |
ISO 178 |
| Compressive strength (MPa) |
110 |
ISO 604 |
| Hardness (Shore D) |
78 |
ISO 868 |
| Coefficient of friction (dry vs steel) |
0.20 – 0.30 |
ASTM D1894 |
| Melting point (°C) |
220 ±5 |
ISO 3146 |
| Continuous service temp. (°C) |
-40 to 90 |
Internal method |
| Short-term peak temp. (°C) |
150 |
— |
| Flammability |
HB |
UL 94 |
Key Performance Data
- Wear factor below 3×10⁻⁶ mm³/N·m against steel at 0.5 m/s and 0.5 MPa. Cast nylon tube lasts 30 % longer than extruded nylon tube in dry sliding.
- Static friction coefficient 0.20–0.30. Runs without external lubrication at low speeds.
- Water absorption 0.6 % in 24 h. Diameter change under 0.3 % at 50 % RH.
- Noise reduced by 5–7 dB compared to steel sleeves under identical load and rpm.
- No rust after 500 h salt spray (ASTM B117). Non-magnetic.
Certifications & Compliance
- ISO 9001:2015 — certified quality management system.
- RoHS (Directive 2011/65/EU) — compliant.
- FDA 21 CFR 177.1500 — natural grades available for food contact.
- Third-party test reports for tensile, wear rate, and density available upon request.
OEM/ODM Customization
| Customization option |
MOQ |
Sample lead time |
Sample charge |
| Non-standard OD, ID, or length |
200 kg per size |
5 working days |
USD 50 (refunded on order) |
| Filled grades (Oil, MoS₂, solid lubricants) |
300 kg |
10 working days |
USD 80 (refunded on order) |
| Private label packaging |
500 kg |
3 working days (artwork) |
Free |
Packaging & Container Loading
- Each tube wrapped in PE film → bundled in 5‑10 pieces → packed in 5‑ply corrugated box.
- Boxes stacked on ISPM 15 heat-treated fumigated pallet (1.1 m × 1.1 m).
- Maximum pallet gross weight: 800 kg.
- 20GP container: approx. 10 pallets; 40HQ: approx. 20 pallets.
Quality Control
- Incoming inspection: raw material melt flow index and density verified per batch.
- In‑line monitoring: OD, ID, and wall thickness checked with laser micrometer on 10 % of tubes per shift.
- Batch traceability: unique lot number laser-marked on each tube. Traceable to raw material lot and casting date.
Lead Time & Supply
| Order size |
Lead time |
| ≤500 kg |
10 working days |
| FCL (approx. 8–10 MT) |
15 working days |
| Trade term |
FOB Shanghai (EXW available) |
Downloads
Full Nylon Parts Catalogue (PDF)
