Custom Plastic Piston Rings
Plastic piston rings serve in pumps, compressors, valves, and sealing systems where metal rings cause wear, contamination, or corrosion. Machined versions allow material selection based on chemical exposure, temperature range, and friction requirements without the tooling cost of molding.
- Diameter Tolerance
- ±0.05 mm
- Min. Diameter
- 20 mm
- Quote Turnaround
- 2 Business Days
Material Choices for Plastic Piston Rings
PlasticCNCPro machines piston rings from POM, Nylon, UHMW-PE, PTFE, PEEK, PPS, and filled grades. PTFE and PEEK suit high-temperature or aggressive media applications. POM and filled Nylon provide better dimensional stability and lower cost for moderate conditions. Material selection considers wear rate against mating surfaces, moisture absorption, and required clearance at operating temperature.
PTFE & PEEK
High-temperature and aggressive media service, low friction, excellent chemical resistance.
POM & Filled Nylon
Better dimensional stability and lower cost for moderate operating conditions.
UHMW-PE & PPS
Abrasion resistance and thermal stability for demanding sealing environments.
Filled Grades
Custom fillers tuned to wear rate, moisture absorption, and clearance at temperature.
CNC Processes Applied to Piston Ring Production
Rings start from rod, tube, or plate stock. All work occurs on multi-axis equipment suited to engineering plastics.
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1
CNC Turning
Creates the outer diameter, inner diameter, and axial faces from rod, tube, or plate stock.
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2
Milling
Adds grooves, slots, or anti-rotation features with precision control.
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3
Drilling & Tapping
Produces mounting holes when the ring design requires them.
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4
Secondary Operations
Precision boring for tight ID control and surface finishing to reduce friction.
Achievable Tolerances & Inspection
- ±0.05 mm standard tolerance on diameters, with tighter control available on critical sealing surfaces.
- Roundness and flatness verified with CMM and height gauges.
- Surface roughness recorded when specified.
- First-article reports and dimensional data included with each batch for customer review before volume runs.
Project Types That Fit This Process
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New Equipment Prototypes
Early-stage designs validated before committing to production tooling.
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Low-Volume Production
Ideal where injection molding is uneconomical or volumes do not justify tooling.
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Replacement Parts
Legacy machinery support with complex cross-sections or integrated wear indicators handled directly from CAD data.
The approach works for diameters from 20 mm upward and ring thicknesses that maintain structural integrity under pressure.
Industries That Source Plastic Piston Rings
Replacement orders often come from maintenance teams at plants running older pumps or compressors.
Working with PlasticCNCPro
Send 2D drawings, 3D models, or samples along with material preference, quantity, and operating conditions. The team reviews manufacturability and returns a quotation with lead time.
1. Review & Quote
Manufacturability review with a quotation and lead time returned to you.
2. Sample Production
Samples produced first for fit and function checks before volume commitment.
3. Production & Export
Production orders follow agreed inspection and packaging standards before export shipment.
Request Pricing for Plastic Piston Rings
Provide part geometry, material, annual volume, and tolerance requirements. Response times for quotations are typically within two business days.
PlasticCNCPro
29 Fuxing Road, Dongguan City, Guangdong Province, China
info@plasticcncpro.com