Manufacturer Direct Wear-resistant Self-lubricating Natural Green Oil-containing Nylon Gear

Manufacturer direct wear-resistant self-lubricating oil-containing nylon gears — also known as green oil nylon gears or MC Nylon oil-filled gears — are a specialised engineering plastic gear made from MC Nylon (monomer cast polyamide PA6) with vegetable or mineral oil dispersed uniformly throughout the nylon matrix during casting. The oil-containing MC Nylon turns a distinctive natural green or olive colour, which distinguishes it from standard natural (cream) MC Nylon. As the gear tooth surfaces wear slightly during operation, the dispersed oil migrates to the tooth surface and provides continuous boundary lubrication — making these gears truly maintenance-free in heavy-duty dry-running applications where standard self-lubricating plastics would suffer excessive tooth wear. Korea Ever-Power supplies oil-containing nylon gears direct from manufacturer to international B2B buyers. ISO9001 certified. Module 0.5–5.0. Material: Nylon / POM / plastic. Available as injection rack pinion gear, spur, helical, and custom forms.

Korea Ever-Power's oil-containing nylon gears are designed for heavy-duty drives, conveyor systems, packaging machinery, construction equipment, and agricultural machinery — applications where standard plastic gears lack the load capacity and wear resistance for continuous-duty service. The manufacturer-direct supply chain delivers ISO9001-certified gears at competitive pricing with 24-hour quote response, 25–35 day mould lead time, sample from provided samples, and video production quality inspection.

Oil Nylon Spur Gear

Custom MC Nylon

Large Diameter

Product Parameters

Oil-Containing MC Nylon vs Standard MC Nylon

Oil Dispersed in the Nylon Matrix

During MC Nylon casting, oil (typically a compatible vegetable or mineral oil) is introduced into the liquid monomer before polymerisation. As the monomer polymerises to form the solid PA6 matrix, the oil becomes dispersed uniformly throughout the solid nylon as microscopic droplets within the polymer matrix. The oil does not separate from the nylon — it is held within the solid polymer structure until released by surface wear. This uniform dispersion ensures that oil is available at any point on the tooth surface where it is needed, regardless of the orientation or direction of loading.

Oil Migration to Tooth Surface

As the gear tooth surfaces experience sliding contact under load, the friction and pressure at the contact zone cause minute quantities of the dispersed oil to migrate to the surface — providing a continuously replenished boundary lubrication film at exactly the tooth contact zone where it is needed. This self-replenishment mechanism ensures that even in high-load, high-cycle operation, the lubrication film is always present and the tooth surface friction coefficient remains low — preventing the progressive wear escalation that would occur in a dry-running standard nylon gear at the same load.

Reduced Moisture Absorption

The oil dispersed in the MC Nylon matrix reduces the material's water absorption rate — from ~2–3% for standard MC Nylon to ~1.5% for oil-containing MC Nylon. The oil occupies sites in the nylon structure that would otherwise be available for water molecule absorption, reducing the equilibrium moisture content of the gear in humid environments. This lower moisture absorption improves dimensional stability — reducing the tooth profile error from hygroscopic swelling, maintaining more consistent backlash across varying humidity conditions.

Designing Plastic Gears for Heavy Loads

Consider torque and speed before design — plastic gear load capacity depends on tooth size (module), face width, material, and operating temperature. Tooth flanks are designed to minimise moulding stress and maximise load-carrying capacity. Choose a slightly narrower face width than the equivalent steel gear to reduce the risk of mechanical interference at the toe end and stress concentration from slight tooth misalignment. Design with a diameter greater than 1 × module × tooth count to ensure adequate rim thickness behind the teeth for structural support.

Injection vs Cast for Oil Nylon Gears

Oil-containing MC Nylon is available in two production methods: (1) Cast MC Nylon block or rod, then CNC hobbed — for large gears (OD > 100 mm) or small quantities where mould tooling cost is not justified. (2) Injection-moulded oil-filled PA6 compound — for small gears at high volume, where the oil is compounded into the PA6 pellets before injection moulding. Korea Ever-Power supplies both routes; the choice depends on gear size, quantity, and required precision grade. Injection-moulded oil-nylon gears achieve lower precision grades (DIN8–9) than CNC-hobbed cast oil-nylon (DIN6–7).

Rack and Pinion Gear Applications

Oil-containing MC Nylon is widely used for rack and pinion linear motion applications — the continuous sliding contact of the rack-pinion mesh benefits greatly from the self-supplied lubrication of oil nylon. Korea Ever-Power's injection rack pinion gear product (module 0.5–5.0) in oil-containing nylon or POM suits linear drives in CNC machine tool axes, 3D printer motion systems, packaging machine linear drives, and medical bed positioning systems where long-term maintenance-free rack-pinion operation is required.

Conveyor and Packaging Machinery

Large-module (M3–M5) oil-containing MC Nylon spur gears in heavy conveyor drive heads and packaging machine line drives. The continuous-duty operation of conveyor systems makes the zero-maintenance oil nylon gear ideal — no re-greasing access points needed, no lubricant contamination of product contact surfaces, and the self-lubrication mechanism extends tooth life to match the machinery's scheduled overhaul interval.

Construction Equipment

Oil MC Nylon large-diameter gear wheels in construction equipment winches, concrete mixer drives, and material handling equipment. The outdoor, dirty environment of construction sites — dust, water ingress, temperature cycling — requires a gear material that is self-lubricating (lubricant would attract dust contamination), corrosion-resistant (no metal contact with wet concrete or soil), and capable of absorbing shock loads without fracture.

Agricultural Machinery

Oil-containing MC Nylon gears in seed drill drives, irrigation system gear heads, and crop processing machinery. Agricultural environments combine high shock loads (stones, hard ground), wet and dry cycles, chemical exposure (fertilisers, herbicides), and remote operation where maintenance access is limited. Oil nylon gears meet all these requirements: shock-resistant nylon matrix, chemical resistance, self-lubricating, and no re-greasing needed between seasonal maintenance windows.

Industrial CNC and Linear Motion

Injection rack-pinion gear sets (M0.5–M5) in oil-containing nylon or POM for CNC machine tool axis drives, 3D printer linear systems, and laser cutter gantry drives. The rack-pinion interface operates under continuous sliding contact at high cycle rates — precisely the condition where oil nylon's self-lubrication advantage over standard nylon is greatest. The reduced tooth wear extends rack-pinion life and maintains positioning accuracy for longer between rack replacements.

Water Treatment and Chemical Plants

Oil MC Nylon gears in slow-speed, high-load drives in water treatment plant bar screens, chemical reactor agitators, and pump drives. The corrosion resistance of nylon against the chemicals present in water treatment (chlorine, sulphuric acid for pH adjustment) eliminates the rust failure mode of steel gears; the self-lubrication provides continuous low-friction operation in the submerged or wet environments common in treatment plant drives.

General Heavy Industry

Oil-containing MC Nylon gears in textile machinery drives, paper mill equipment, printing machine gear trains, and rubber processing equipment. In these heavy-duty, continuous-operation industrial environments, the zero-maintenance oil nylon gear reduces planned downtime for re-greasing, eliminates lubricant cost and disposal, and provides longer service life between gear replacements compared with standard plastic or unlubricated nylon gears.

When can I get a price quotation?

Korea Ever-Power usually provides price quotations within 24 hours of receiving your inquiry with gear specification. For urgent requests, state "URGENT" in the inquiry or call directly — urgent inquiries are prioritised for immediate response. Please include: gear type, module, tooth count, material, quantity, drawing (if available), and your target delivery date to enable the fastest complete quotation. Submit via the Korea Ever-Power contact form.

How long is the mould lead time, and can it be shortened?

Standard mould lead time is 25–35 days depending on mould size and complexity. For simple, small moulds, Korea Ever-Power can complete within 15 days. Factors that extend mould time: large mould size, multiple cavities, complex gear form (helical, bevel), tight tolerance requirements requiring trial-and-modification. To start without mould commitment: Korea Ever-Power can supply CNC-machined samples from MC Nylon cast stock within 5–10 days — allowing functional testing in your application before mould tooling is approved.

I don't have drawings — can I start from a sample?

Yes — provide your gear sample and Korea Ever-Power will measure and complete the full drawing design including module, tooth count, pressure angle, face width, bore, and all dimensions. Korea Ever-Power returns the completed drawing for your approval before mould design begins. This reverse-engineering service allows customers without CAD capability to reproduce existing gears exactly — common for replacement parts for equipment where the original drawings are unavailable.

How is quality ensured before delivery?

When no third-party inspection or factory visit is arranged, Korea Ever-Power provides a comprehensive video inspection record showing: the production process in real time, dimensional measurements with actual measured values, structural and surface detail close-ups, and packaging details. The video is sent before shipment for customer review and approval. For standard production batches, Korea Ever-Power's ISO9001 quality system controls process parameters and records first-article inspection data. Dimensional certificates available on request. Contact Korea Ever-Power to discuss your quality requirements.

"We source oil-containing green MC Nylon rack-pinion sets (M3, rack + 20T pinion) from Korea Ever-Power for our large-format cutting machine linear drives. Compared with our previous standard MC Nylon without oil: tooth wear rate measured at 12 months: 0.08 mm vs 0.31 mm for dry MC Nylon at the same load. Re-greasing eliminated — production line cleanliness improved significantly. Quote turnaround: 18 hours from specification submission. Mould delivered: 22 days (simple mould). Video inspection before shipment: clear and comprehensive."

Kim Yong-su  |  CNC Machine Design Engineer, Incheon Industrial Cutting Systems Co.  ·  Q1 2026

"We had no drawing for our irrigation pump drive gear (sample only). Korea Ever-Power measured the sample, returned drawing in 3 days — all dimensions confirmed correct on first check. Oil MC Nylon replacement gears (M4, 30T) supplied after 28-day mould: dimensional check on 10 sample pcs confirmed all within ±0.05 mm of drawing. In service for 18 months in chlorinated water irrigation system: no corrosion, no dimensional change beyond initial moisture equilibrium, zero lubrication applied."

Lee Tae-yang  |  Agricultural Equipment Engineer, Gyeonggi Irrigation Systems Co.  ·  Q4 2025