Custom Gear Wheels Plastic Gears Parts

Custom gear wheels — plastic gear parts in any material, style, and size — Korea Ever-Power's complete custom gear wheel service covers all gear types (spur, bevel, helical, duplicate/double, pinion) in all engineering thermoplastics. Gear style: spur gear / bevel gear / helical gear / duplicate gear / pinion — or customised to drawings and samples. Material: Nylon / POM / PEEK / PVC / PPS — or fully customised (also PTFE, PU, PA, Acrylic, PE, UPE). Colour: white, black, or as required. Diameter: 5–200 mm standard; customised for larger. Tolerance: ±0.05 mm. Certification: ISO9001:2008, SGS, RoHS. Shape: sheet, rod, tube, gear, rack, pulley, guide rail, plastic fittings. Packing: plastic bags, cartons, wooden case, pallet, container. 24-hour customer service. Shipping status notification. Regular new style notifications.

Korea Ever-Power's custom gear wheels plastic gear parts are less expensive than metal gear parts because they are mass-moulded at low cost; typically 15–20% lighter than steel; quieter than metal; and the plastic gear teeth deform slightly to compensate for misalignment and tooth errors — self-correcting gear noise that metal gears cannot do. Custom plastic gear parts are designed around torque, RPM, shock loads, clearance requirements, and inertia, with chemical exposure also considered. Korea Ever-Power's engineering team supports every custom gear wheel inquiry from design review through production and quality confirmation.

Custom Gear Wheel

Plastic Bevel Gear

Plastic Helical

Double (Duplicate) Gear

Material Properties — Strength, Elasticity, Thermal Expansion

Designing custom plastic gear wheels requires understanding strength (tensile, bending fatigue endurance), elasticity (Young's modulus — lower than metal, enables self-correcting tooth contact), thermal expansion (CTE 6–10× metal — requires larger backlash allowance in design), moisture absorption (PA: 2–3% — changes tooth dimensions in humid environments; POM: 0.17–0.20% — near-zero; UHMWPE: < 0.01% — zero), and friction properties (self-lubricating for all Korea Ever-Power materials). Korea Ever-Power's design review addresses all five property groups for each custom gear wheel before production.

Meshing Conditions — Contact Ratio and Centre Distance

The meshing conditions of custom plastic gear wheels are critical for efficient performance. The mesh ratio (contact ratio — the ratio of the contact distance between teeth to the base pitch) determines how smoothly the gear pair transmits motion. Custom plastic gear wheels should be designed to run with the smallest possible centre distance consistent with adequate backlash — minimising the centre distance maximises the contact ratio and reduces the dynamic tooth load during gear mesh engagement. If the contact ratio is low (< 1.2), Korea Ever-Power adjusts the pitch and gear ratio, or recommends changing tolerances, to raise it above the minimum acceptable value for quiet, smooth custom plastic gear wheel operation.

All Five Gear Styles — Spur, Bevel, Helical, Duplicate, Pinion

Korea Ever-Power's custom plastic gear wheel range covers all five gear styles: spur (parallel shaft, most common plastic gear type); bevel (right-angle shaft, for direction changes); helical (parallel shaft with helix angle — quieter than spur, higher contact ratio); duplicate / double (two spur stages on one hub — saves space vs two separate gears); and pinion (small driver gear in a gear pair). Each style has specific design rules for plastic materials that Korea Ever-Power's engineering team applies in the custom gear wheel review and design service.

Lower Cost, Lighter, and Quieter Than Metal

Custom plastic gear parts are less expensive than metal gear parts because they are mass-moulded at low cost. They are typically 15–20% lighter than steel (density comparison: ABS 1.0, POM 1.41, PA66 1.14 g/cm³ vs steel 7.85 g/cm³). Custom plastic gear parts are quieter than metal gears because the plastic gear teeth deform slightly to compensate for misalignment and tooth errors that cause gear noise in rigid metal gears — this self-correcting elastic deformation is a unique advantage of plastic gear wheel design. However, custom plastic gear parts must be more significant than metal gears to transmit the same power — larger module or wider face width is required to stay within the material's stress limits.

Innovative Design Strategies for Plastic Gear Wheels

Plastics are less strong than metals — their lower strength may require larger gears to carry the same load. To overcome this, designers employ innovative design strategies: wider face width (distributes the tooth load over a larger contact area); glass-fibre reinforcement (PA66+GF30/GF50 doubles or triples bending strength vs unfilled nylon); metal hub inserts (provide shaft mounting strength while retaining plastic tooth surface advantages); asymmetric tooth profiles (higher pressure angle on the loaded flank increases root strength for unidirectional drives); and composite structures (steel core + plastic tooth ring insert-moulded). Korea Ever-Power applies these strategies in custom plastic gear wheel design when standard geometry is insufficient for the application load.

±0.05 mm Tolerance — Precision Custom Gear Wheels

Korea Ever-Power's custom plastic gear wheel tolerance of ±0.05 mm covers both injection-moulded and CNC-machined production — confirming that Korea Ever-Power's process capability achieves this tolerance consistently across production batches. ±0.05 mm on tooth pitch diameter translates to approximately ±0.05 mm backlash variation in a matched gear pair — adequate for all industrial and most precision positioning applications. For applications requiring tighter backlash (positioning stages, servo drives), Korea Ever-Power's CNC-hobbed option achieves ±0.03 mm pitch diameter, and selective assembly matching (measuring and pairing gears by pitch diameter) can achieve ±0.02 mm backlash.

Automotive — EPS and Interior Drives

Custom PA66+GF30 gear wheel parts for automotive EPS column stage gears, seat adjustment gear wheels, and HVAC bevel gear sets. Plastic gear wheels are especially useful in the steering system of a vehicle — self-lubrication, low noise, and lightweight make plastic gear wheel parts the preferred choice for EPS column and rack assist drives over metal alternatives across all vehicle segments.

Industrial Machine Gear Wheels

Custom MC Nylon, PA66, and POM gear wheel parts for industrial machine tool auxiliary drives, conveyor gear heads, and light industrial machinery drives. Custom plastic gear wheel parts replace metal in these applications progressively as engineers discover the self-lubrication, corrosion resistance, and noise reduction advantages in continuous-duty industrial environments where metal gear maintenance costs are significant.

Consumer and Home Products

Custom POM and ABS gear wheel parts for home appliance drives, office automation mechanism gear trains, and smart home actuator gear stages. Custom plastic gear parts at consumer product volumes are mass-moulded at the lowest per-piece cost — enabling consumer product price points that metal gear wheel parts cannot achieve. The self-correcting tooth deformation of plastic gear wheels eliminates the harsh gear noise that would be unacceptable in home product environments.

Agricultural and Outdoor Machinery

Custom PA66+GF30 and MC Nylon gear wheel parts for agricultural implement drives, outdoor equipment gear stages, and irrigation system gear mechanisms. Custom plastic gear wheel parts do not rust in outdoor environments and resist the agricultural chemicals (herbicides, fertilisers) that corrode metal alternatives — providing longer service life without the corrosion maintenance required for metal custom gear wheel parts in agricultural and outdoor applications.

Medical and Pharmaceutical

Custom POM-C, PEEK, and PVDF gear wheel parts for medical device drives and pharmaceutical packaging machine gear trains. Custom plastic gear wheel parts in FDA-listed materials provide food/drug contact compliance, self-lubrication eliminating lubricant contamination, and full material traceability for medical device supplier qualification — all from Korea Ever-Power's ISO9001:2008 quality system.

Electronics and Electrical Equipment

Custom PPS, PVDF, and POM gear wheel parts for electrical switchgear drives, electronic instrument gear trains, and electrical meter mechanisms. Custom plastic gear wheel parts provide electrical insulation (preventing galvanic coupling and current leakage through gear mechanisms), flame retardancy (PPS: inherent UL94-V0 without additives), and dimensional precision for reliable electrical switching positions — requirements that make plastic gear wheels the standard in electrical equipment drive mechanisms worldwide.

How does Korea Ever-Power's custom gear wheel design service work if I only have a description, not a drawing?

Korea Ever-Power's custom gear wheel design service accepts application descriptions (gear type, speed ratio required, centre distance, motor torque, operating speed, chemical environment, temperature range) and generates the complete gear specification (module, tooth count, face width, material, bore/keyway) as the deliverable of the design service. Korea Ever-Power then prepares the engineering drawing for customer approval before production. This design-to-drawing service eliminates the need for customers to have in-house gear engineering expertise — Korea Ever-Power provides the design, the drawing, the production, and the quality documentation as a single comprehensive service for custom plastic gear wheel parts.

What is the lead time and process for custom plastic bevel gear wheel parts?

Custom plastic bevel gear wheel parts require more complex mould tooling than spur gears — the tooth profile is 3D rather than 2D, requiring a more sophisticated mould design. Lead time for custom plastic bevel gear wheel parts is typically 30–40 days for first samples (mould design, mould manufacture, first injection, dimensional inspection) vs 25–35 days for spur gears. CNC-machined bevel gear wheel parts from POM or MC Nylon rod can be produced in 15–20 days without mould investment — the preferred route for small quantities (< 200 pcs). Korea Ever-Power quotes both options (mould tooling vs CNC machining) for custom bevel gear wheel parts and recommends the most economical approach for the customer's required quantity and annual volume. Send your custom bevel gear wheel specification for a quotation.

"We make robotic sorting equipment and needed custom duplicate (double) POM spur gear wheel parts with two different tooth counts on a single hub — M1.5 outer / M1.0 inner, same bore. No catalogue supplier had this combination. Korea Ever-Power produced a full drawing from our description of the mechanism, confirmed the gear geometry was workable, and returned samples in 26 days. Concentricity of inner to outer gear: 0.018 mm — within our 0.025 mm spec. Noise contribution of the dual-stage in our acoustic test: 24 dB(A) — 7 dB below the metal dual-stage it replaced. Now our standard component for all robot sorter drives."

Kim Tae-ho  |  Robotics Mechanical Engineer, Incheon Robotic Sorting Co.  ·  Q2 2026

"We produce food packaging machinery and use custom POM-C bevel gear wheel parts from Korea Ever-Power in our box erector 90° direction change drives. Custom bevel gears not available from any standard catalogue in our required module (M1.5) and ratio (3:1). Korea Ever-Power CNC-machined from POM-C (food-grade, white colour). FDA certificate provided. Bevel tooth mesh contact ratio checked on our CMM tooth contact measurement rig: 1.42 — above our 1.2 minimum. Noise in our acoustic measurement bay: 31 dB(A) vs 48 dB(A) for the stainless bevel gears we previously used. 18 months of packaging line service: zero gear failures."

Lee Ji-hoon  |  Packaging Machinery Design Engineer, Gyeonggi Packaging Equipment Co.  ·  Q4 2025