{"id":2150,"date":"2026-07-24T00:24:45","date_gmt":"2026-07-24T00:24:45","guid":{"rendered":"https:\/\/gearrack.top\/product\/injection-rack-pinion-gear-pom-nylon-plastic-gear-rack-small-module\/"},"modified":"2026-07-24T00:25:27","modified_gmt":"2026-07-24T00:25:27","slug":"injection-rack-pinion-gear-pom-nylon-plastic-gear-rack-small-module","status":"publish","type":"product","link":"https:\/\/gearrack.top\/it\/product\/injection-rack-pinion-gear-pom-nylon-plastic-gear-rack-small-module\/","title":{"rendered":"Injection Rack Pinion Gear | POM Nylon Plastic Gear Rack Small Module"},"content":{"rendered":"

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Injection Rack Pinion Gear \u2014 Plastic Gear Rack Overview<\/h2>\n

Ever-Power injection rack pinion gear<\/a> plastic gear racks<\/strong> are mould-plastic injection and CNC-machined rack and pinion sets produced in Acetal (POM), Nylon (PA6 \/ PA66), and other engineering plastics across a wide module range from 0.5 MOD to 5.0 MOD and above. The standard starting module is 0.8 MOD \u2014 a size commonly used in 3D printer linear axes, small camera slider drives, and desktop automation where compact rack dimensions are required and low-noise spur tooth engagement is essential. The design incorporates a gear with flange or hub, side holes, and screw mounting provisions, allowing secure installation in housings and fixtures without additional metalwork.<\/p>\n

Unlike conventional metal rack and pinion drives, plastic rack and pinion sets for small-module applications offer prolonged service life under light load with reduced maintenance requirements. The polymer tooth surface absorbs mesh impact energy, resists corrosion without surface treatment, and runs dry without lubricant \u2014 properties that are particularly valuable in 3D printers and small automation equipment where access for maintenance is restricted and lubricant contamination of the printed part or product would be unacceptable. Each rack specification can be produced by CNC machining from bar stock (for prototype and small quantities) or by opening an injection mould (for high-volume production at lower unit cost).<\/p>\n

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Specifiche tecniche<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nValue \/ Options<\/th>\n<\/tr>\n<\/thead>\n
Name<\/strong><\/td>\nInjection rack pinion gear \u2014 plastic gear rack<\/td>\n<\/tr>\n
Descrizione del prodotto<\/strong><\/td>\nMould plastic injection custom POM small plastic rack pinion gear<\/td>\n<\/tr>\n
Materiale<\/strong><\/td>\nAcetal (POM), Nylon (PA6 \/ PA66), and other engineering plastics<\/td>\n<\/tr>\n
Module Available<\/strong><\/td>\n0.5 MOD, 0.8 MOD, 1 MOD, 1.5 MOD, 2 MOD and above; custom per drawing<\/td>\n<\/tr>\n
Tooth Type<\/strong><\/td>\nLow-noise spur gear (straight tooth)<\/td>\n<\/tr>\n
Gear Features<\/strong><\/td>\nFlange\/hub; side holes; compatible with screw mounting<\/td>\n<\/tr>\n
Production Method<\/strong><\/td>\nCNC machining or injection mould (mould tooled to customer spec)<\/td>\n<\/tr>\n
Module (Short desc)<\/strong><\/td>\n0.5 to 5.0<\/td>\n<\/tr>\n
Certificazione<\/strong><\/td>\nISO 9001:2015<\/td>\n<\/tr>\n
Compatible With<\/strong><\/td>\nSmall motors, 3D printers, servo drives, micro-linear actuators<\/td>\n<\/tr>\n
Lead Time<\/strong><\/td>\nQuote within 24 hours; mould lead time 15-35 days<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Module Range and Application Guide<\/h2>\n

The module of a plastic rack determines the tooth size, load capacity, and the size of the compatible pinion. The table below maps common modules to typical plastic materials, drive types, and applications \u2014 from miniature 3D printer axes at 0.5 MOD through to residential gate drives at 2.0 MOD and above.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n
Modulo<\/th>\nTooth Size<\/th>\nTypical Plastic Material<\/th>\nCompatible Drive<\/th>\nTypical Application<\/th>\n<\/tr>\n<\/thead>\n
0.5 MOD<\/strong><\/td>\nVery small<\/td>\nPOM \/ Nylon<\/td>\nMicro servo<\/td>\n3D printer Z-axis, small camera sliders, model automation<\/td>\n<\/tr>\n
0.8 MOD<\/strong><\/td>\nSmall<\/td>\nPOM \/ PA66<\/td>\nSmall DC motor<\/td>\n3D printer Y\/X axis, small appliance linear drives<\/td>\n<\/tr>\n
1.0 MOD<\/strong><\/td>\nStandard small<\/td>\nPOM \/ PA66 \/ MC Nylon<\/td>\nDC motor \/ gear motor<\/td>\nDesktop CNC, small conveyor diverters, medical device positioning<\/td>\n<\/tr>\n
1.5 MOD<\/strong><\/td>\nMedium-small<\/td>\nPA66 \/ MC Nylon<\/td>\nGear motor<\/td>\nLight industrial positioning, laboratory automation, gate locks<\/td>\n<\/tr>\n
2.0 MOD<\/strong><\/td>\nMedium<\/td>\nMC Nylon \/ PA66<\/td>\nGear motor \/ servo<\/td>\nResidential gate drives, greenhouse ventilation, light conveyors<\/td>\n<\/tr>\n
3.0+ MOD<\/strong><\/td>\nLarge<\/td>\nMC Nylon \/ PA66<\/td>\nServo \/ stepper<\/td>\nCommercial gate drives, heavier automation, industrial positioning<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Rack and Pinion Design Principles for Plastic Small-Module Racks<\/h2>\n

Plastic rack and pinion systems for small-module drives follow the same geometric principles as full-size industrial racks, but the design constraints differ at small module because: tooth bending stress is a smaller concern relative to surface wear at small module; thermal expansion of the polymer is a larger proportion of the tooth pitch at small module; and the pinion tooth count is typically very small (as few as 10-12 teeth), increasing the per-tooth load cycle count per revolution compared with larger pinions.<\/p>\n

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⚙ Spur vs Helical Tooth at Small Module<\/h3>\n

Low-noise spur (straight) tooth profiles are standard for small-module plastic rack drives. Helical teeth would require extremely precise helix angle matching between rack and pinion at small module \u2014 a manufacturing tolerance constraint that is impractical without CNC gear grinding. Spur teeth at 0.5-2.0 MOD in POM or PA66 run quietly enough for 3D printer and desktop automation applications where the drive speed is low.<\/p>\n<\/div>\n

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🔧 Backlash and Centre Distance<\/h3>\n

Small-module plastic rack drives are more sensitive to centre distance error than large-module equivalents \u2014 a 0.1 mm centre distance error is 20% of a 0.5 mm tooth pitch but only 2.5% of a 4 mm tooth pitch. Set the pinion centre distance carefully to the nominal value and allow 0.05-0.1 mm backlash at small module. Over-tightening generates rapid tooth tip wear on both rack and pinion at small module in POM or nylon.<\/p>\n<\/div>\n

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☀ Thermal Expansion at Small Module<\/h3>\n

A 1,000 mm PA66 rack grows approximately 1.5 mm over a 30\u00b0C temperature change \u2014 the same absolute expansion as a large-module rack, but representing many tooth pitches at 0.8 MOD (pitch = 2.51 mm). For 3D printer or desktop automation racks spanning 200-400 mm, the growth per section is 0.3-0.6 mm \u2014 manageable with a joint gap of 0.3-0.5 mm at each butt joint if sections are used, or accommodated in the end-stop travel margin if a single section covers the full stroke.<\/p>\n<\/div>\n

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🔎 CNC vs Injection Mould Production<\/h3>\n

CNC machining is preferred for prototype and small-quantity orders of any custom module or dimension \u2014 no tooling cost, 7-14 day lead time. Injection moulding is preferred for high-volume production of fixed-dimension racks where the mould cost is amortised over a large quantity \u2014 lower unit cost, 15-35 day mould lead time on first order, then rapid re-order supply from existing mould tooling.<\/p>\n<\/div>\n<\/div>\n\n\n\n
\"injection<\/td>\n\"plastic<\/td>\n\"factory<\/td>\n\"CNC<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Material of Plastic Gear Rack<\/h2>\n

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 sections for long-travel drives. The polyacetal-based DRFD and DRFK series include mounting holes. The injection-moulded DR series has unique flexibility properties suitable for curved-path locations. The material selected depends on the daily cycle count, the required force, and the environment \u2014 moisture, chemical exposure, and temperature. Dimensional stability is critical for maintaining gear tooth contact ratio, tooth tip clearance, and overall geometry throughout the service life.<\/p>\n

Quality Assurance and Manufacturing<\/h2>\n

\"Ever-Power<\/p>\n

Ever-Power injection rack pinion gear racks are produced under ISO 9001:2015 quality management. CNC-machined racks are inspected for tooth profile, pitch, and cross-section dimensions on every batch. Injection-moulded racks are first-article inspected against the approved drawing before production batch release. Every order ships with dimensional inspection report. Production video documentation of the manufacturing process is available on request.<\/p>\n

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\"Ever-Power<\/p>\n

ISO 9001:2015 and Quality Certificates<\/p>\n<\/div>\n

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Documentation with every order:<\/strong><\/p>\n