Lubricating Nylon Gear Plastic Gear

Lubricating nylon pinion gears — Korea Ever-Power's lubricate nylon gear range covers all plastic pinion gear types in self-lubricating nylon materials: polyacetal (POM), MC Nylon, polyamide resin (PA6/PA66), UHMWPE, and PEEK. Gear hubs optionally made of stainless steel or S45C steel insert for shaft interfaces requiring press-fit or key-drive mounting with metal-to-shaft precision. Fused (over-moulded or insert-moulded) gear constructions also available — where hub and tooth ring are fused into a single part with holding strength higher than the tooth surface strength. Product name: lubricate nylon gear. Mould materials: per customer request. Tolerance: 0.05 mm. Size: per sample or drawing. Colour: natural, black, blue, white, and custom. Quote 24 hours. Mould 25–35 days (15 days simple). Start from sample. Video QC.

Korea Ever-Power's lubricating nylon gears with 30% fibreglass infill are available for applications requiring higher torque and longer service life — the glass-fibre-reinforced nylon pinion is used as shaft-mounted gears in more demanding transmission drives. The self-lubricating nylon material is resistant to corrosion, making it an excellent choice for many applications where metal pinion gears would corrode. Root and flank strength — the key life parameters of any plastic pinion — are both maintained within Korea Ever-Power's fatigue design limits across the full production run.

Lubricating Nylon

Oil-Containing

Nylon Pinion

MC Nylon Pinion

Material Range — POM, MC Nylon, PA, UHMWPE, PEEK

Korea Ever-Power's lubricating nylon pinion gears are available in the complete engineering plastic range — polyacetal (POM) for precision dry-running drives; MC Nylon for heavy-load shaft-mounted pinion gears; PA6/PA66/PA66+GF for injection-moulded pinion gears at volume; UHMWPE for the most demanding abrasion and chemical resistance; and PEEK for high-temperature or autoclavable applications. Each material provides self-lubrication of varying effectiveness — POM: μ ≈ 0.10; MC Nylon oil-grade: μ ≈ 0.06; UHMWPE: μ ≈ 0.04–0.08 — covering the range from standard-dry to ultra-low-friction self-lubricating pinion gears.

Steel Hub Insert — Fused and Over-Moulded Pinions

The hubs of lubricating nylon gears are usually made of stainless steel or S45C steel insert for applications requiring metal-to-shaft precision — key drives, spline drives, or precision taper-bore mounting. In fused (insert-moulded) gear construction, the metal hub and the nylon tooth ring are fused into a single part — the holding strength of the fused interface is higher than the strength of the tooth surface, so the metal hub never loosens relative to the nylon gear ring under normal service loads. This fused construction gives the lubricating nylon pinion the best of both worlds: metal hub precision and strength, plastic tooth ring self-lubrication and noise reduction.

30% Fibreglass Infill — Higher Torque Grade

PA66+GF30 (30% glass fibre reinforced nylon 66) lubricating pinion gears are the standard choice for applications requiring higher torque and long service life than standard unfilled nylon pinions can provide. GF30 infill increases tensile strength from ~80 MPa (PA66 unfilled) to ~180 MPa — more than doubling the tooth bending strength and enabling the lubricating nylon pinion to be used as shaft-mounted gears in motor gearheads and industrial drive stages where previous nylon grades were too weak. GF30 also significantly reduces creep (permanent deformation under sustained load) — a critical property for precision gearboxes where tooth backlash must not increase over the gear's service life.

Root and Flank Strength — Life Prediction

The two critical life parameters of lubricating nylon pinion gears are root strength (resistance to tooth bending fatigue — number of load cycles before tooth root crack initiation) and flank strength (resistance to surface fatigue and wear at the tooth contact zone — number of load cycles before pitting or measurable wear). Both parameters are affected by the number of load cycles (the smaller gear in a pair accumulates more cycles per unit time), the material's fatigue endurance curve, and the tooth contact stress at the design load. Korea Ever-Power calculates both root and flank stress for each custom lubricating nylon pinion and confirms the predicted life before production.

Dimensional Stability — Addressing Temperature Concerns

Machined plastic gears lose their shape and tensile strength when exposed to temperature changes beyond their service limits — this has led some designers to avoid plastic gears in their applications. Korea Ever-Power addresses this concern directly: (1) by selecting the correct material grade for the operating temperature (PA6/POM: up to 90°C; PA66+GF30: to 130°C; PPS: to 200°C; PEEK: to 250°C); (2) by designing the tooth backlash to accommodate thermal expansion without binding; (3) by providing insert-moulded metal hub construction for bore dimensional stability even if the nylon tooth ring expands. Korea Ever-Power's engineering review eliminates temperature-related failure modes before production.

Corrosion Resistance — Eliminating Metal Failure Mode

Lubricating nylon pinion gear material is resistant to corrosion — making it an excellent choice for applications where metal pinion gears would corrode. This corrosion resistance is especially important for shaft-mounted pinion gears in agricultural machinery (fertiliser and pesticide exposure), food processing (cleaning agents and food acids), marine equipment (salt water), and chemical plant drives. PA66+GF30 shaft-mounted nylon pinion gears have replaced rusted metal pinion gears in all these environments, providing 3–5× longer service life without the corrosion-inhibiting coatings, seals, and regular inspection that metal gears require in corrosive environments.

Motor Gearhead Shaft-Mounted Pinions

PA66+GF30 insert-moulded lubricating nylon pinion gears with S45C steel hub inserts as shaft-mounted first-stage pinions in DC motor gearheads and stepper motor gearboxes. The GF30 infill provides the bending strength needed for first-stage pinion loads; the steel hub insert provides the bore precision and interference-fit holding strength for direct motor shaft mounting; the self-lubricating nylon tooth ring eliminates the grease filling required by metal first-stage pinions in sealed gearhead housings.

Industrial Drive Pinion Gears

PA66+GF30 and MC Nylon shaft-mounted lubricating pinion gears in industrial gearbox first and second stages, conveyor drive pinion gears, and process equipment drive pinions. GF30 shaft-mounted nylon pinion gears are positioned as the next-generation upgrade from cast iron or steel pinion gears in medium-load industrial drives where the self-lubrication, corrosion resistance, and noise reduction of nylon provide clear operational advantages without compromising the drive's load capacity.

Automotive Auxiliary Drive Pinions

PA66+GF30 insert-moulded lubricating nylon pinion gears with steel hub inserts in automotive window regulator motors, wiper motor gearboxes, and seat adjustment drive pinions. Automotive accessory drive pinion gears must combine metal hub precision for motor shaft mounting with plastic tooth ring self-lubrication and noise reduction — the fused (insert-moulded) construction of Korea Ever-Power's lubricating nylon pinion satisfies both requirements in a single compact part.

Agricultural Machinery Pinion Gears

GF30 and UHMWPE lubricating nylon pinion gears in fertiliser spreader drives, irrigation pump gear heads, and harvester accessory drives. These applications combine abrasive environments (fertiliser granules, grit, crop particles), chemical exposure (herbicides, fertilisers), and remote field operation (no maintenance for weeks at a time). GF30 nylon's corrosion resistance and self-lubrication eliminate the corrosion and re-lubrication failures that limit metal pinion gear life in agricultural machinery.

Medical and Pharmaceutical Pinions

PEEK and POM lubricating nylon pinion gears in surgical robot joint stages, infusion pump pinion gears, and pharmaceutical packaging machine drive pinions. Self-lubricating plastic pinion gears eliminate the lubricant contamination risk that disqualifies greased metal pinion gears from food-contact and pharmaceutical environments. PEEK insert-moulded pinion gears with stainless steel hubs provide the biocompatibility, autoclave resistance, and metal-hub precision of high-grade medical device drive components.

Marine and Chemical Plant Pinions

UHMWPE and PEEK lubricating nylon pinion gears with stainless steel hub inserts in marine pump drive pinions, offshore platform auxiliary drive gear heads, and chemical plant process pump gear drives. Corrosion resistance to salt water, acid cleaning solutions, and process chemicals eliminates the metal pinion gear corrosion that requires expensive stainless steel or coated steel alternatives in marine and chemical plant environments — at a fraction of the machining cost of equivalent stainless steel pinion gears.

What is the advantage of a fused (insert-moulded) metal hub over an all-plastic hub for shaft-mounted lubricating nylon pinion gears?

All-plastic hub: suitable for light-duty applications (light press fit or grub screw mounting on small shafts, low transmitted torque). Fused metal hub (insert-moulded): the metal hub provides the bore dimensional accuracy (±0.01 mm bore tolerance vs ±0.05 mm for moulded plastic bore), interference-fit holding strength (metal expands with shaft under press-fit interference — nylon creeps and loses grip over time), and torsional strength for key or spline drives. In fused gear construction, the holding strength of the nylon-to-metal bond exceeds the tooth surface bending strength — so the hub never loosens before the gear teeth fail, eliminating the most common failure mode of all-plastic hub nylon pinion gears in shaft-mounted applications. Korea Ever-Power recommends fused metal hub construction for all lubricating nylon pinion gears with shaft diameters > 6 mm or transmitted torque > 0.5 Nm.

How does the 30% fibreglass infill affect the self-lubricating property of nylon pinion gears?

The 30% glass fibre reinforcement slightly increases the friction coefficient of the nylon gear tooth surface — GF30 nylon has μ ≈ 0.15–0.25 vs μ ≈ 0.10–0.20 for unfilled PA66, and the GF30 surface is slightly abrasive to the mating tooth. For most industrial applications, this slight increase in friction is well within acceptable limits and is outweighed by the large strength improvement. For the lowest friction in GF-reinforced grades, oil-grade MC Nylon with MoS₂ additive or PTFE-filled PA66 (PTFE reduces friction back to μ ≈ 0.08–0.12 even in the presence of GF) is recommended. Korea Ever-Power confirms the friction requirements for each application and recommends the correct grade. Contact Korea Ever-Power with your torque, speed, and lubrication requirements.

"We manufacture industrial conveyor gearheads and source PA66+GF30 fused nylon pinion gears (M2, 14T, S45C steel hub insert, 12 mm bore) from Korea Ever-Power for our 200 W motor first-stage drives. We had been using cast iron pinion gears requiring grease refilling every 500 hours. Korea Ever-Power's GF30 nylon pinion: zero lubrication for 18 months confirmed; root stress calculated by Korea Ever-Power at 62% of PA66+GF30 fatigue endurance limit — comfortable safety margin. Noise at motor shaft: reduced 7 dB(A). Hub bore tolerance achieved: ±0.012 mm — within our press-fit specification. Hub loosening failures: zero."

Kim Sang-il  |  Gearhead Design Engineer, Incheon Drive Systems Co.  ·  Q2 2026

"We supply fertiliser spreader drives for precision agriculture and use UHMWPE lubricating pinion gears from Korea Ever-Power in our spreader chain drive pinion heads. Previous S45C steel pinion gears: severe corrosion after first season's fertiliser exposure, requiring annual replacement. UHMWPE pinion at end of season 3: no corrosion, no measurable tooth wear, chain elongation 0.2 mm/m (well within replacement limit). The self-lubrication eliminated the re-greasing service our dealers had been doing at season start — saving approximately 45 minutes per machine per season across our 800-unit fleet."

Lee Jae-seong  |  Agricultural Equipment Engineer, Gyeonggi Precision Ag Co.  ·  Q4 2025