Low Noise Oil Casting Mc Nylon Star Wheel CNC

Low-noise oil-casting MC Nylon star wheels are precision CNC-machined from oil-containing monomer cast (MC) nylon — the highest-performance grade of cast polyamide PA6. MC Nylon (monomer casting nylon) has a molecular weight of 70,000–100,000 mol⁻¹ — three times that of standard PA6/PA66 — giving it mechanical properties significantly superior to injected nylon grades. The oil-casting variant incorporates lubricant within the nylon matrix during casting, providing continuous self-lubrication that eliminates tooth surface friction at the contact zone, further reducing noise and extending wear life. Korea Ever-Power CNC-machines these star wheels to any size and tooth profile. Raw material: 100% virgin nylon. Colour: natural, white, black, green, blue, yellow, grey, and custom. Certification: ISO, RoHS, SGS, FDA. Customised size.

Korea Ever-Power's oil-casting MC Nylon star wheels serve chemical engineering, electric/electronic industry, automotive industry, packaging machinery, engineering machinery, and pharmaceutical/equipment industry — anywhere low-noise, self-lubricating, corrosion-resistant star wheel components with high vibration absorption are required as an ideal substitute for bronze, stainless steel, babbitt, and PTFE.

Oil-Casting MC Nylon

Green Oil Nylon

Large Diameter

3× Higher Molecular Weight

MC Nylon's molecular weight of 70,000–100,000 mol⁻¹ is approximately 3 times that of standard PA6/PA66 (20,000–30,000 mol⁻¹). Higher molecular weight means longer polymer chains, more chain entanglement per unit volume, and therefore much higher inter-chain cohesion — the fundamental reason MC Nylon's mechanical properties (tensile strength ~110 MPa, impact strength, fatigue endurance) significantly exceed those of standard PA6/PA66 (~70 MPa). For star wheels subjected to high tooth contact stress and repeated impact loading in heavy industrial conveyor and machinery applications, this higher cohesion strength directly extends service life.

Atmospheric Pressure Casting — No Internal Stress

MC Nylon is produced by pouring liquid caprolactam monomer with catalyst into a simple mould under atmospheric pressure (no injection pressure), where it polymerises in situ. This atmospheric-pressure casting produces a part with very low internal residual stress — unlike injection-moulded nylon where the high injection pressure freezes significant stress into the solidifying material. The low residual stress in MC Nylon star wheels means the teeth do not tend to warp or deform under service conditions, and fatigue cracks do not initiate at stress concentrations from processing — improving both dimensional stability and fatigue life.

Oil-Casting — Built-In Self-Lubrication

The oil-casting process introduces lubricant oil uniformly throughout the MC Nylon matrix during polymerisation. As the star wheel tooth surface wears microscopically under contact loading, the dispersed oil migrates to the contact zone — providing a continuously replenished boundary lubrication film. This built-in self-lubrication gives oil-casting MC Nylon star wheels their "low noise" characteristic: the lubrication film at the tooth contact reduces the friction force impulse at each engagement cycle, which is the direct cause of gear-mesh noise. Reduced friction → reduced noise impulse → quieter operation — this is the mechanism behind the "low noise" designation.

Good Wear Resistance

MC Nylon's good wear resistance comes from the combination of its high molecular cohesion (chains cannot easily be pulled from the surface under abrasive contact) and the oil-casting lubrication (reduces the friction force that drives abrasive wear). Compared with standard PA6/PA66, oil-casting MC Nylon shows 2–4× lower abrasive wear rate in standard pin-on-disc testing under equivalent loads and speeds. For star wheels operating in abrasive environments (grain dust, soil particles, metal swarf contamination), this improved wear resistance directly extends the interval between star wheel replacements.

High Vibration and Sound Absorption

MC Nylon's high internal damping (loss factor η ≈ 0.08–0.12 — significantly higher than steel's η ≈ 0.001) means it absorbs vibrational energy from tooth mesh impacts and converts it to low-level heat — rather than radiating it as sound. This high sound absorption property, combined with the oil-casting lubrication's noise reduction, makes oil-casting MC Nylon the lowest-noise engineering plastic star wheel material available. In machinery where gear-source noise must be minimised — pharmaceutical processing, food production, laboratory automation, office equipment — oil-casting MC Nylon star wheels provide the best noise performance without acoustic enclosures.

Additive Enhancement Options

Korea Ever-Power's MC Nylon star wheels can incorporate additional performance-enhancing additives beyond the base oil-casting formulation: MoS₂ (molybdenum disulphide) — further reduces friction coefficient to μ ≈ 0.04–0.06; graphite — reduces friction and improves electrical conductivity for anti-static applications; glass fibre — increases tensile strength by 40–60% for higher-load star wheels; carbon fibre — increases stiffness and strength while reducing weight. These additive-enhanced grades allow Korea Ever-Power to tailor MC Nylon star wheel performance to specific application requirements.

Chemical Engineering

Oil-casting MC Nylon star wheels replacing bronze and stainless steel star wheels in chemical reactor agitator drives, pump gear heads, and chemical plant conveyor drives. MC Nylon's excellent corrosion resistance to most industrial chemicals (acids, alkalis, solvents), combined with its self-lubricating property (no external lubricant contamination of process fluids), makes it the preferred gear material in chemical process equipment where metal components corrode and require expensive maintenance.

Electrical and Electronic Industry

Oil-casting MC Nylon star wheels in electrical switchgear timing mechanisms, transformer tap-changer drives, and electrical meter mechanisms. MC Nylon's electrical insulation properties (high volume resistivity, high dielectric strength) prevent current leakage through the gear mechanism — a requirement in electrical equipment where metallic gears would create short-circuit paths. The anti-static grade (graphite-filled MC Nylon) is used where electrostatic charge accumulation must be dissipated to prevent sparking near flammable materials.

Automotive Industry

Oil-casting MC Nylon star wheels replacing bronze and brass transmission components in automotive gear shift mechanisms, differential half-shaft stars, and power take-off components. MC Nylon's bending strength (~110 MPa) approaches that of bronze for light automotive transmission loads, while offering significant advantages: no corrosion, no galvanic coupling with aluminium housings, self-lubricating (no separate lubricant maintenance), and 75% lighter than bronze — reducing unsprung mass in driveline components.

Packaging Machinery

Oil-casting MC Nylon CNC star wheels in packaging line bottle and container handling star wheel stations, timing star wheels, and product orientation wheels. The low noise of oil-casting MC Nylon star wheels is particularly valued in packaging lines operating near workers for extended shifts — and the self-lubricating oil-casting grade eliminates the lubricant contamination risk from externally applied greases in food-adjacent packaging line environments.

Engineering Machinery

Large-diameter oil-casting MC Nylon CNC star wheels replacing metal components in crane slewing ring drive star wheels, excavator accessory drives, and construction equipment chain-drive sprocket stars. MC Nylon's shock absorption — an order of magnitude higher than metal — protects the drive train from the impact loads of construction equipment operation; the self-lubricating property suits sealed construction machinery drives where re-greasing access is impractical.

Pharmaceutical Equipment

FDA-listed oil-casting MC Nylon star wheels in pharmaceutical tablet coating pan drives, capsule filling machine timing mechanisms, and blister packaging machine star wheel stations. The oil-casting MC Nylon's self-lubricating property eliminates external lubricant addition in pharmaceutical processing environments where any lubricant contamination of drug product is unacceptable under GMP regulations. The low noise suits the controlled-environment pharmaceutical production areas where acoustic conditions affect personnel comfort and concentration.

Why is oil-casting MC Nylon quieter than standard MC Nylon or POM?

Oil-casting MC Nylon is quieter than standard MC Nylon for two reasons that add together: (1) MC Nylon's already-high internal damping absorbs tooth-mesh vibration energy before it radiates as sound — same as standard MC Nylon; (2) the oil-casting lubrication reduces the friction force impulse at each tooth engagement cycle — the primary noise driver in unlubricated gears. The oil film at the tooth contact converts the impact event from a higher-friction abrupt contact to a lower-friction lubricated contact — reducing both the peak force and the duration of the contact impulse, directly reducing the noise generated. The result is typically 3–5 dB(A) lower than standard (dry) MC Nylon at the same speed and load.

What does the "CNC" designation mean for MC Nylon star wheels?

CNC indicates that the star wheel is produced by CNC (Computer Numerically Controlled) machining from oil-cast MC Nylon rod, disc, or plate stock — rather than by injection moulding. CNC machining of MC Nylon from cast stock provides: (1) higher dimensional precision (DIN6–DIN7 achievable vs DIN7–DIN8 for injection moulded nylon); (2) no mould tooling cost for large diameters or small quantities — the CNC program replaces the mould; (3) ability to produce any star wheel size including very large diameters (> 500 mm) that cannot be injection-moulded economically. Korea Ever-Power's CNC machining facility produces oil-casting MC Nylon star wheels from any 2D drawing or 3D CAD file, typically in 10–20 days from drawing approval. Contact Korea Ever-Power to start your order.

"We operate a chemical plant and replaced bronze star wheels in our pump gear heads with oil-casting MC Nylon CNC star wheels from Korea Ever-Power. Corrosion resistance in 15% HCl solution: no degradation at 12 months (bronze showed significant pitting at 3 months). Noise reduction: 11 dB(A). Lubrication eliminated: no external grease applied for 18 months. Dimensional check at 18 months: tooth profile within 0.06 mm of new — well within acceptance limit. Cost saving per annual replacement: 58% below bronze."

Kim Hyeong-jun  |  Chemical Plant Maintenance Engineer, Incheon Chemical Processing Co.  ·  Q1 2026

"We manufacture tablet coating equipment for pharma and needed FDA-compliant, lubricant-free star wheels for our pan drive. Korea Ever-Power supplied oil-casting MC Nylon CNC star wheels with FDA material certificate. GMP audit result: passed — no extractables above threshold in ISO 10993 test. Noise at 1 m: 42 dB(A) vs 61 dB(A) for previous metal star wheel. Operating for 14 months without any maintenance — no lubrication, no adjustment. Korea Ever-Power CNC machined to our DXF drawing in 14 days."

Lee Yeon-soo  |  Pharmaceutical Equipment Engineer, Gyeonggi Pharma Equipment Co.  ·  Q4 2025