Precision CNC Manufacturing of Hydraulic & Pneumatic Seals
Looking for CNC-machined hydraulic and pneumatic seals in the UK? At Rhondama Ltd, we specialise in precision CNC seal manufacturing using advanced lathes and tooling. From custom prototypes to production runs, we deliver high-quality seals in a wide range of elastomers and engineering plastics, all produced in-house at our Loughborough, Leicestershire facility.
Our CNC Capabilities
Our machining facility is equipped with three in-house CNC lathes, enabling us to produce precision components from 5mm internal diameter (ID) up to 600mm outer diameter (OD).
We also offer:
Bar feed technology for efficient, continuous long-run production
Active tooling for complex milling and threading operations
Rapid production for custom, prototype, or small batch runs
This combination ensures short lead times, high accuracy, and consistent quality across all manufactured parts.
Materials We Machine
Explore our high-performance materials for hydraulic and pneumatic seals. Click each section to view detailed specifications, approvals, temperature range, hardness, and key properties.
| Material | Color | Approvals | Temp (°C) | Shore A | Shore D |
|---|---|---|---|---|---|
| NBR (Nitrile)Excellent oil and fuel resistance. Suitable for hydraulic & pneumatic seals. -30°C to +100°C. | FDA, WRAS | -30 to +100 | 60–90 | - | |
| FKM (Viton®)Outstanding chemical and heat resistance. Ideal for high-temperature hydraulic applications. -20°C to +200°C. | FDA, EU1935/2004 | -20 to +200 | 60–90 | - | |
| MVQ (Silicone)Flexible, excellent thermal stability, suitable for extreme temperatures. -50°C to +200°C. | FDA, EU1935/2004 | -50 to +200 | 40–80 | - | |
| EPDMGood chemical, ozone, and weather resistance. Ideal for water applications. -50°C to +150°C. | FDA, WRAS | -50 to +150 | 50–90 | - | |
| HNBRHigh-strength nitrile with excellent wear and chemical resistance. -30°C to +150°C. | - | -30 to +150 | 60–90 | - | |
| AFLAS®EDExcellent resistance to heat, chemicals, and steam. -10°C to +200°C. | - | -10 to +200 | 60–90 | - |
| Material | Color | Approvals | Temp (°C) | Shore A | Shore D |
|---|---|---|---|---|---|
| HPU Premium(TPU)High wear resistance, flexible, suitable for dynamic seals. -30°C to +120°C. | FDA | -30 to +115 | 94 ±3 | 49 ±3 | |
| HPU Green (TPU)High wear resistance, flexible, suitable for dynamic seals. -30°C to +120°C. | -30 to +115 | 94 ±3 | 49 ±3 | ||
| HPU Low Temperature (TPU)High wear resistance, flexible, suitable for dynamic seals. -30°C to +120°C. | -50 to +115 | 94 ±5 | 47 ±3 | ||
| X-HPU Solid (TPU)High wear resistance, flexible, suitable for dynamic seals. -30°C to +120°C. | -30 to +110 | 58 ±3 |
| Material | Color | Approvals | Temp (°C) | Shore A | Shore D |
|---|---|---|---|---|---|
| Acetal (POM, Delrin®)High strength, low friction, good chemical resistance. -40°C to +100°C. | FDA, EU10/2011 | -40 to +100 | - | 80 | |
| Nylon (PA6/PA66)Good mechanical strength, wear and abrasion resistance. -40°C to +120°C. | FDA optional | -40 to +120 | - | 80–85 | |
| UHMWPEUltra-high molecular weight, excellent wear resistance, low friction. -200°C to +80°C. | FDA | -200 to +80 | - | 65–70 | |
| PTFE (Virgin & Filled)Low friction, chemical resistant, can include Bronze/Carbon/Graphite/MoS₂ fillers. -200°C to +260°C. | FDA, EU1935/2004 | -200 to +260 | - | 50–65 |