{"id":1850,"date":"2026-07-20T05:24:09","date_gmt":"2026-07-20T05:24:09","guid":{"rendered":"https:\/\/gearrack.top\/?p=1850"},"modified":"2026-07-20T05:24:09","modified_gmt":"2026-07-20T05:24:09","slug":"plastic-gears-for-office-automation","status":"publish","type":"post","link":"https:\/\/gearrack.top\/it\/plastic-gears-for-office-automation\/","title":{"rendered":"Plastic Gears for Office Automation"},"content":{"rendered":"
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GEAR APPLICATION GUIDE \u00b7 PLASTIC GEAR \u00b7 PL01<\/span><\/p>\n

Plastic Gears for Office Automation:
\nMaterial Selection and Noise Reduction<\/span><\/h1>\n

Office automation equipment \u2014 laser printers, copiers, scanners, fax machines, and paper shredders \u2014 uses plastic gears in almost every drive train stage. Their self-lubricating properties, lightweight, corrosion resistance, low noise, and low cost make plastic gears technically superior to steel alternatives in these applications. This guide covers material selection, tooth design, noise reduction and common failure modes for office automation plastic gear drives.<\/p>\n

POM \u00b7 PA66 \u00b7 PPS \u00b7 LCP \u00b7 PEEK<\/span>
\nModule M0.3 \u2013 M2.5 \u00b7 Injection Moulded<\/span>
\nPrinter \u00b7 Copier \u00b7 Scanner \u00b7 Shredder Drive<\/span><\/div>\n<\/div>\n<\/div>\n
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MODULE RANGE<\/p>\n

M0.3 \u2013 M2.5<\/p>\n

Office automation plastic gear module range \u2014 laser printer paper feed at M0.5\u2013M1.5; copier main drive at M1.0\u2013M2.5; shredder drive at M1.5\u2013M2.5<\/p>\n<\/div>\n

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WEIGHT SAVING<\/p>\n

75\u201385%<\/p>\n

POM plastic gear weight vs equivalent steel gear \u2014 density 1.41 g\/cm\u00b3 (POM) vs 7.85 g\/cm\u00b3 (steel). Directly reduces motor size, inertia, and power consumption in printer and copier drive trains<\/p>\n<\/div>\n

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NOISE REDUCTION<\/p>\n

8\u201312 dB(A)<\/p>\n

Plastic gears quieter than equivalent steel gears at the same speed and load \u2014 due to higher damping coefficient, lower elastic modulus absorbing mesh impact, and smoother tooth surface Ra achievable by injection moulding<\/p>\n<\/div>\n

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SELF-LUBRICATING<\/p>\n

\u03bc \u2248 0.10\u20130.25<\/p>\n

POM and PA (Nylon) friction coefficients running dry against themselves or against steel \u2014 no external lubrication required, eliminating oil contamination of paper paths and sensitive optical components in office equipment<\/p>\n<\/div>\n<\/div>\n

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Why Office Automation Uses Plastic Gears \u2014 Not Steel<\/h2>\n

The universal adoption of plastic gears in office automation equipment is not a cost-reduction compromise \u2014 it is the correct engineering choice driven by several performance requirements that steel gears cannot meet simultaneously. The most important is noise: a 45 dB(A) total printer operating noise budget leaves very little headroom for the gear drive train. Steel gears at the pitch line velocities and loads of a laser printer paper feed drive (typically 0.5\u20133 m\/s, 0.5\u20132 Nm torque) generate 8\u201312 dB(A) more mesh noise than equivalent plastic gears because steel has very low internal damping. The viscoelastic damping of engineering polymers absorbs the impulsive mesh contact energy before it can be radiated as airborne noise from the gear body.<\/p>\n

Korea Ever-Power’s plastic gears for office automation<\/a> are injection moulded in POM (Delrin\/Duracon), PA66\/PA46 with glass or carbon fibre reinforcement, PPS and LCP for high-temperature printer components, and PEEK for the most demanding precision positioning applications. All plastic gear moulds for office automation are machined to \u00b10.002 mm tool accuracy to achieve the tooth profile tolerances needed for quiet gear drives in office equipment.<\/p>\n

The self-lubricating property of POM and Nylon is equally important: laser printer paper paths, copier platen assemblies, and scanner optical rails cannot tolerate oil contamination. A steel gear drive in these assemblies would require grease or oil that, over the product lifetime, would inevitably migrate to contaminate paper, printed surfaces, or optical components. Plastic gears eliminate this lubricant exclusion zone entirely \u2014 no lubricant is needed, applied, or at risk of migrating.<\/p>\n

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Noise \u2014 The Dominant Requirement<\/h3>\n

Office equipment operating noise (IEC 62368-1 \/ ISO 7779) must be below 45\u201352 dB(A) for class A office environments. The gear drive train is a major noise source in printers and copiers. Plastic gears’ viscoelastic damping absorbs impulsive mesh contact energy, and their lower elastic modulus (POM: 3.2 GPa vs steel: 200 GPa) reduces the dynamic stiffness of the gear mesh \u2014 resulting in 8\u201312 dB(A) quieter operation than equivalent steel gears without any change to gear ratio, pitch line velocity, or transmitted torque. No comparable noise reduction technique for steel gears at these small modules and low loads is commercially practical.<\/p>\n<\/div>\n

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Lubrication-Free Operation<\/h3>\n

POM and PA66 plastic gears run dry at friction coefficients of 0.10\u20130.25 against each other and 0.08\u20130.15 against steel \u2014 acceptable for the low-to-medium loads of office equipment drives without external lubrication. This eliminates the lubricant contamination risk to paper, printed media, and optical scanning components. It also eliminates periodic relubrication from the maintenance schedule \u2014 a practical requirement for office equipment that must operate for years without maintenance attention from users.<\/p>\n<\/div>\n

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Low Inertia and Precision Positioning<\/h3>\n

Plastic gear density (POM: 1.41 g\/cm\u00b3; PA66: 1.14 g\/cm\u00b3) is 80\u201385% lower than steel (7.85 g\/cm\u00b3). In a laser printer paper feed drive with dozens of small gears, the cumulative inertia reduction from plastic vs steel gears allows the stepper motor to achieve accurate step positioning at higher stepping frequencies \u2014 directly improving paper feed accuracy and print registration. The lower inertia also reduces motor current demand during stop-start cycling, enabling smaller, less costly stepper motors throughout the printer drive train.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Plastic Gear Material Selection for Office Automation<\/h2>\n
\"nylon
Korea Ever-Power nylon (PA66) plastic spur gears for office automation drive applications \u2014 injection moulded, Module M1.5, 30T\u201360T, OD tolerance \u00b10.05 mm, tooth profile tolerance DIN 7\u20138 class confirmed by optical gear measurement. Self-lubricating, moisture-stable (PA66 GF30 with 30% glass fibre reinforcement for dimensional stability in humid environments), noise measured 9 dB(A) lower than equivalent steel spur gears at 600 RPM 0.5 Nm. Available as standard catalogue items in natural, black and custom colours for brand differentiation in OEM printer and copier applications.<\/figcaption><\/figure>\n
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MATERIAL<\/th>\nTENSILE STRENGTH<\/th>\nMAX TEMP (continuous)<\/th>\nMOISTURE ABSORPTION<\/th>\nMAIN OFFICE AUTOMATION USE<\/th>\n<\/tr>\n<\/thead>\n
POM (Delrin\/Duracon)<\/td>\n65\u201370 MPa<\/td>\n90\u00b0C<\/td>\n0.2% (low \u2014 dimensionally stable)<\/td>\nPaper feed rollers, drum drive, scanner, shredder \u2014 most common office automation gear material<\/td>\n<\/tr>\n
PA66 (Nylon 66)<\/td>\n80\u201385 MPa<\/td>\n105\u00b0C<\/td>\n2.5% (moderate \u2014 use GF30 for stability)<\/td>\nHigher-torque copier drive stages and fuser drive; GF30 reinforced for dimensional stability<\/td>\n<\/tr>\n
PA66 GF30 (Glass-filled Nylon)<\/td>\n160\u2013180 MPa<\/td>\n120\u00b0C<\/td>\n0.7% (low with glass fibre)<\/td>\nFuser drive gears (high temperature zone), heavy-duty copier paper transport, stepper motor output gear<\/td>\n<\/tr>\n
PPS (Polyphenylene Sulphide)<\/td>\n130\u2013170 MPa (GF40)<\/td>\n220\u00b0C<\/td>\n0.01% (extremely low)<\/td>\nLaser printer fuser unit drive gears (175\u2013200\u00b0C operating zone) \u2014 highest temperature plastic gear material commonly used in office automation<\/td>\n<\/tr>\n
LCP (Liquid Crystal Polymer)<\/td>\n150\u2013200 MPa<\/td>\n240\u00b0C<\/td>\n0.01%<\/td>\nPrecision scanner drive gears requiring very tight dimensional tolerances at elevated temperature and humidity cycling; also used for miniature M0.3\u2013M0.5 module printer gears<\/td>\n<\/tr>\n
PEEK<\/td>\n100\u2013210 MPa<\/td>\n250\u00b0C<\/td>\n0.1%<\/td>\nHighest-performance printer\/copier gears: precision positioning drives, ESD-sensitive environments, sterilisable medical equipment document drives<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n
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Office Automation Drive Applications<\/h2>\n
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DRIVE 01<\/p>\n

LASER PRINTER
\nPAPER FEED<\/p>\n<\/div>\n

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Gear specification:<\/strong> Module M0.5\u2013M1.5, POM or PA66, injection moulded, helical tooth form preferred for lowest noise. Paper feed gear trains in laser printers (A4 monochrome to A3 colour) typically contain 8\u201325 individual plastic gears between the stepper motor and the paper pickup roller, paper feed roller, separation pad roller, and registration roller assemblies. The critical requirement is cumulative backlash management \u2014 each gear pair in the chain contributes to the total backlash seen at the paper drive rollers, and excessive backlash causes registration error visible as misaligned text in high-resolution laser prints. Korea Ever-Power moulds paper feed gears to backlash tolerance below 0.05 mm per pair for laser printer OEM applications.<\/p>\n<\/div>\n<\/div>\n

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DRIVE 02<\/p>\n

COPIER DRUM
\n& FUSER DRIVE<\/p>\n<\/div>\n

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Gear specification:<\/strong> Module M1.5\u2013M2.5, PPS or PA66 GF30 for fuser (175\u2013200\u00b0C); POM for drum drive and photosensitive drum coupling gears. The fuser unit drive in laser printers and copiers operates at the highest temperature in the machine \u2014 typically 175\u2013200\u00b0C at the fuser roller surface. POM would soften and deform at this temperature; PPS with 40% glass fibre reinforcement (operating range to 220\u00b0C continuous) is the standard material. The drum drive gears operate at ambient temperature but require very uniform angular velocity \u2014 transmission error in the photosensitive drum drive creates density banding in the printed image. Korea Ever-Power supplies drum drive gears with transmission error below 0.01 mm for high-resolution 1200 dpi colour copier OEM production.<\/p>\n<\/div>\n<\/div>\n

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DRIVE 03<\/p>\n

FLATBED
\nSCANNER DRIVE<\/p>\n<\/div>\n

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Gear specification:<\/strong> Module M0.5\u2013M1.5, POM or LCP, high helix angle (20\u00b0\u201330\u00b0) for ultra-low noise, precision tooth profile for minimum transmission error, backlash below 0.03 mm per pair. Flatbed scanner carriage drive gear trains must move the scan carriage at uniform velocity \u2014 velocity non-uniformity caused by backlash, transmission error, or pitch errors in the gear train appears directly as horizontal scan line irregularity in the scanned image. 600\u20131200 dpi scanner mechanisms cannot tolerate velocity variation above 0.5%. Korea Ever-Power supplies scanner drive plastic gears in POM and LCP with tooth profile deviation below 4 \u03bcm and pitch error below 3 \u03bcm for OEM flatbed scanner programmes.<\/p>\n<\/div>\n<\/div>\n

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DRIVE 04<\/p>\n

PAPER
\nSHREDDER DRIVE<\/p>\n<\/div>\n

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Gear specification:<\/strong> Module M1.5\u2013M2.5, PA66 GF30 or POM, spur tooth form, ratio 5:1\u201315:1 from motor to shredder cutter shaft. Paper shredder plastic gear drives must handle frequent shock loads when paper jams \u2014 the shredder reverses direction to clear jams, creating momentary torque spikes 3\u20135\u00d7 the running torque. PA66 GF30 is preferred over POM for shredder drives because its higher impact strength and higher fatigue limit handle these repeated shock events better than unfilled POM. For heavy-duty office shredders above 10 sheets per pass, Korea Ever-Power recommends PA66 GF30 or glass-filled PBT for the main drive gear set, confirmed for the required shock torque cycle count by accelerated fatigue testing on request.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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Plastic Gear Failure Modes and Solutions in Office Equipment<\/h2>\n
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COMMON FAILURE MODES<\/h3>\n