Customized Plastic or Stainless Steel Straight Pinion Plastic Gear Rack
Ever-Power customized plastic and stainless steel pinion gear racks are manufactured to your drawing in a full range of alloy steel and plastic material combinations — straight-pinion spur profiles in diameters from 20 mm to 2,000 mm, machined by turning, milling, drilling, grinding, hobbing, and heat treatment as required. Whether you need a compact PA66 nylon rack paired with a stainless steel pinion for a corrosion-resistant food-processing drive, or a large-diameter 20CrMnTi steel rack for an industrial automation gantry, the specification is confirmed from your drawing and manufactured under ISO 9001:2015 quality management.
Customized Plastic and Stainless Steel Pinion Gear Rack — Overview
Ever-Power customized plastic pinion gear racks bridge the gap between standard catalogue sizes and the precise geometry that your application demands. Where off-the-shelf racks require modification or simply do not exist in the required module, diameter, or material combination, Ever-Power machines directly from your drawing. The result is a rack that drops into your housing or fixture without on-site re-machining, with dimensional traceability back to the original drawing specification.
The range covers both metal and plastic output options. Alloy steel pinion racks in 40Cr, 65Mn, 20Cr, 20CrMnTi, 18Cr, and 2Ni4W are available for high-load, high-cycle duty. Plastic variants in PA66 nylon, POM acetal, MC nylon, and UHMW-PE are available for corrosion-resistant, lubrication-free, or contamination-sensitive drives. Stainless steel straight pinion racks are a popular choice for food processing and pharmaceutical applications where chemical resistance, wash-down compatibility, and dimensional precision all apply simultaneously. Size capability spans 20 mm to 2,000 mm, covering instrument miniature racks through to large industrial rack-and-pinion systems.
Technical Specifications
| Parameter | Value / Options |
|---|---|
| Material (Metal) | 40Cr, 65Mn, 20Cr, 20CrMnTi, 18Cr, 2Ni4W alloy steel; stainless steel 304/316 |
| Material (Plastic) | PA6, PA66, MC nylon (MC901), POM acetal, UHMW-PE; or per customer drawing |
| Process | Turning, milling, drilling, grinding, hobbing, heat treatment |
| Size Range | φ20 mm to φ2,000 mm |
| Accuracy | Per customer drawing specification |
| Tooth Profile | Straight spur standard; helical per drawing |
| Surface Treatment | Black oxide, zinc plating, phosphating, passivation (stainless), as-machined |
| Lead Time | 2 weeks maximum on initial order; rush services available |
| Certification | ISO 9001:2015; material certificate and dimensional inspection report with every order |
Plastic vs Stainless Steel — Choosing the Right Rack Material
The choice between a plastic rack and a stainless steel rack for a corrosion-resistant drive is not always obvious — both offer immunity to rust, but they differ fundamentally in load capacity, cost, temperature rating, and dimensional behaviour. The matrix below covers the most common rack-and-pinion pairing decisions for applications where standard carbon steel is unsuitable.
| Rack | Pinion | Best Properties | Typical Application |
|---|---|---|---|
| PA66 Nylon | Steel 40Cr | Low noise, self-lubricating, corrosion-immune; nylon sacrificially protects pinion | Sliding gates, greenhouse drives, light conveyor diverters |
| POM Acetal | Steel or Stainless | Excellent dimensional stability in wash-down conditions; below 0.2% moisture absorption | Food processing lines, pharmaceutical packaging, lab automation |
| Stainless 316 | Stainless 316 | Full chloride resistance; high load capacity; withstands CIP and SIP cleaning processes | Dairy, beverage, offshore equipment, chemical plant |
| Stainless 304 | Steel or Stainless | Good corrosion resistance, good machinability; lower chloride resistance than 316 | Medical equipment, outdoor architectural, general washdown |
| 20CrMnTi | 42CrMo | Case-hardened HRC 58-62 tooth surface; highest fatigue life for precision drives | CNC machine tool axes, servo gantries, automated warehouse cranes |
| UHMW-PE | Steel or Nylon | Lowest friction coefficient; excellent chemical resistance; FDA-compliant grades available | Food-contact conveyor zones, chemical handling, medical linear drives |
Material of Plastic Gear Rack
Plastic racks can be made from a variety of materials. The traditional PR series uses MC nylon, while the PRF series adds end machining to connect multiple rack sections for long-travel drives. The polyacetal-based DRFD and DRFK series include mounting holes as standard. The injection-moulded DR series has unique flexibility properties making it suitable for curved-path locations. Choosing between these variants depends on section size, shape, and the operating environment — including moisture and chemical exposure. A material with good strength and stiffness must also offer the dimensional stability required to maintain gear tooth contact ratio, tooth tip clearance, and overall geometry throughout the expected service life.
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Applications
🏭 Industrial Automation
Custom rack and pinion sets for conveyor systems, robotic positioning, and automated material handling. Both plastic and alloy steel variants are produced to drawing; matched pinion and rack sets are test-rolled together before shipment to verify contact pattern and backlash.
🦻 Food Processing and Packaging
POM acetal and stainless 316 racks for packaging machinery lane diverters, product pushers, and filling machine head-positioning drives. Wash-down rated and FDA-compliant grades available. Stainless 316 versions withstand CIP cleaning chemistry without pitting or surface degradation.
🌿 Greenhouse and Agricultural
PA66 nylon racks paired with stainless or hard-anodized aluminium pinions for ventilation window drives, shading screen actuators, and irrigation boom systems. The plastic rack resists the humid, salt-laden greenhouse environment without rust or surface coating maintenance.
⚒ Automotive and Transportation
Custom-machined rack components for seat adjustment mechanisms, sunroof drives, and industrial vehicle steering systems. Alloy steel grades (20CrMnTi, 40Cr) with induction-hardened tooth flanks for high-cycle automotive-duty applications requiring both precision and durability.
Quality Assurance and Manufacturing
Ever-Power customized gear rack machining operates under ISO 9001:2015 quality management. Incoming material — whether alloy steel bar, stainless tube, or polymer billet — is verified against the material specification before entering CNC production. Tooth profiles are inspected by profile projector and gear tooth calliper; dimensional inspection covers all drawing-critical dimensions. Every customized rack order ships with material certificate, process record, and dimensional inspection report as standard.
ISO 9001:2015 and Quality Certificates
Documentation with every order:
- Material certificate — grade, chemical composition, mechanical properties
- Dimensional inspection report — all drawing-critical dimensions verified
- Process record — machining and heat treatment traceability
Related Gear Products
Ever-Power manufactures the complete range of industrial gear types alongside plastic racks. Matched plastic gears, steel spur pinions, steel gear racks, and all gear types are available from the same source.
Plastic Gears
Nylon and POM pinions for all-plastic, lubrication-free rack and pinion drives.
Spur Gears
Steel spur pinions to mesh with nylon racks — the most common paired configuration.
Helical Gears
Helical pinions for quieter, higher-load rack drives and speed reducer stages.
Planetary Gear Sets
Compact reducers for servo motor to pinion shaft in precision plastic rack drives.
Engrenages coniques
Right-angle drive stages for compact gear motor input to the rack pinion shaft.
Worm Gear Wheels
Self-locking worm reducers for vertical rack axes holding position without a motor brake.
Ring Gears
Large-diameter ring gears for rotary kilns, slewing drives, and large machinery.
Frequently Asked Questions
When should I choose a stainless steel rack instead of a plastic rack for a corrosion-resistant drive?
Choose stainless steel when the drive force exceeds approximately 500 N — beyond this, the tensile strength limitation of nylon and POM becomes the constraining factor and a stainless steel rack is required to meet the tooth load. Stainless is also the correct choice when the rack must withstand temperatures above 100°C, or when the environment involves strong acids, alkalis, or oxidising chemicals that degrade even high-performance engineering plastics. For light loads with wash-down or outdoor humidity requirements, POM acetal is typically more economical and easier to machine than stainless steel at the same size.
Can you manufacture to my existing OEM rack drawing or replace a worn rack without a drawing?
Yes on both counts. For new production against a drawing, submit your DXF, DWG, STEP, or PDF file and we will produce to the specified dimensions and tolerances. For replacement of a worn rack without a drawing, send us the original part (or a dimensioned photograph alongside a ruler) and our engineering team will measure the module, cross-section, and hole pattern to generate a production drawing for your approval before manufacturing. This service is available at no additional charge for orders above our minimum production quantity.
What is the lead time for a customized plastic or stainless steel gear rack?
Standard lead time is a maximum of 2 weeks on initial order, with rush services available for urgent requirements. Repeat orders from an approved drawing are typically shorter. Lead time is confirmed at quotation based on machining complexity and current production loading. Sample or first-article pieces can usually be shipped within 5-7 days for approval before full production commences.
Request a Quotation for Customized Pinion Gear Racks
Send your drawing, material specification, and required quantity. We return a feasibility review and price within 24 hours.
Informations complémentaires
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