{"id":1942,"date":"2026-07-21T07:22:14","date_gmt":"2026-07-21T07:22:14","guid":{"rendered":"https:\/\/gearrack.top\/?p=1942"},"modified":"2026-07-21T07:22:14","modified_gmt":"2026-07-21T07:22:14","slug":"spur-gears-for-textile-machinery","status":"publish","type":"post","link":"https:\/\/gearrack.top\/ja\/spur-gears-for-textile-machinery\/","title":{"rendered":"Spur Gears for Textile Machinery"},"content":{"rendered":"
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GEAR APPLICATION GUIDE \u00b7 SPUR GEAR \u00b7 S08<\/span><\/p>\n

Spur Gears for Textile Machinery:
\nWeaving Looms, Spinning Frames and Knitting Machine Drives<\/span><\/h1>\n

Textile machinery spur gears occupy a demanding niche that combines the precision demands of printing machine gears with the high-cycle fatigue requirements of industrial conveyors \u2014 a modern high-speed rapier loom runs at 900 picks per minute, completing nearly 500 million weaving cycles per year, placing every spur gear in its pattern drive and takeup mechanism in the ultra-high cycle fatigue regime where even minor tooth surface defects progressively reduce load-carrying capacity to failure. At the same time, the textile industry imposes unique cleanliness requirements \u2014 lubrication must not contaminate the fabric being processed, and in medical textile and food packaging fabric production, the gear oil and housing materials must meet the same regulatory standards as pharmaceutical manufacturing environments. This guide covers spur gear specification, material selection, noise reduction, and fibre contamination prevention for weaving, spinning, knitting, and nonwoven fabric production machinery.<\/p>\n

20CrMnTi \u00b7 C45 \u00b7 316L \u00b7 M1\u2013M8 \u00b7 DIN 5\u20137<\/span>
\n500M cycles \u00b7 Fibre-Free Housing \u00b7 Low Noise<\/span>
\nLoom \u00b7 Spinning \u00b7 Knitting \u00b7 Nonwoven<\/span><\/div>\n<\/div>\n<\/div>\n
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CYCLE RATE<\/p>\n

Up to 900 rpm<\/p>\n

Rapier weaving loom main shaft speed at maximum production. Air-jet loom main shaft: up to 1,100 rpm. Ring spinning frame spindle: 15,000\u201325,000 rpm. Warp knitting machine mainshaft: 1,400\u20132,200 rpm. Ultra-high-cycle fatigue regime applies to all these applications<\/p>\n<\/div>\n

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MODULE RANGE<\/p>\n

M1 \u2013 M8<\/p>\n

Textile machinery spur gear module range. Loom dobby and pattern drive: M1\u2013M2.5. Loom takeup and letoff: M2\u2013M4. Spinning frame delivery rollers: M2\u2013M3. Tufting machine gauge drive: M3\u2013M5. Nonwoven carding and drafting: M4\u2013M8<\/p>\n<\/div>\n

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NOISE LIMIT<\/p>\n

<75 dB(A)<\/p>\n

Textile mill noise limit at the operator position per EU Machinery Directive and ISO 11688. Spur gear noise in loom and spinning drives is a significant contributor to mill ambient noise. DIN 5\u20136 quality class and tip relief applied to reduce gear mesh noise contribution below the 75 dB(A) occupational exposure limit<\/p>\n<\/div>\n

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FATIGUE CYCLES<\/p>\n

>500 million<\/p>\n

Typical tooth load cycles accumulated by a weaving loom spur gear running at 900 rpm for 6,000 hours per year for 2+ years before replacement. The ISO 6336 \u201clong life\u201d or Woehler curve endurance limit applies \u2014 tooth bending stress must remain below the endurance limit at this cycle count<\/p>\n<\/div>\n<\/div>\n

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Spur Gear Requirements in Textile Machinery \u2014 Precision, Speed, and Fabric Cleanliness<\/h2>\n

The textile machinery industry presents an unusual gear application context \u2014 machines that are simultaneously high-precision (the pattern drive of a dobby loom must position the heddle frames with sub-millimetre accuracy at 900 picks per minute), high-speed (air-jet loom main shafts reach 1,100 RPM, placing spur gear pitch line velocities in the 5\u201315 m\/s range for M2\u2013M4 gears), and contamination-sensitive in a way that has no parallel in most industrial gear applications. Fibre contamination of the gear oil \u2014 loose fibres from the warp, weft, or pile yarn being woven or spun that enter the gearbox through shaft clearances or breather openings \u2014 is the primary cause of premature spur gear and bearing failure in textile machinery drives. A cotton fibre lodged between a tooth flank and its mating tooth face introduces a hard abrasive particle (cotton seed hull fragments have hardness approaching HRC 20) that scores both tooth surfaces and initiates a chain of progressive abrasive wear that shortens gear life from the designed 5+ years to 12\u201318 months.<\/p>\n

Korea Ever-Power’s spur gears for textile machinery<\/a> are manufactured in 20CrMnTi case carburized (for all high-speed loom and knitting machine drives where the combination of fatigue life and surface hardness is the specification driver), C45 induction hardened (for slower-speed takeup and letoff mechanisms in weaving looms where cost is the primary criterion), and 316L stainless (for medical textile, surgical drape, and food-contact fabric production where oil contamination of the fabric surface would render the product unusable). The production range covers the complete spectrum of textile industry module and quality requirements \u2014 from M1 dobby latch gears ground to DIN 5 for the most demanding Belgian rapier loom manufacturers, through M8 carding machine gears for nonwoven production facilities. All textile machine spur gears from Korea Ever-Power are supplied with sealed housing mounting provisions and dual-lip shaft seal compatibility to prevent fibre ingress.<\/p>\n

Noise control is the second critical requirement that distinguishes textile machinery spur gears from standard industrial gears. A weaving shed operating 100 rapier looms at 850 picks per minute generates ambient noise levels of 85\u201395 dB(A) \u2014 well above the 85 dB(A) action level that requires hearing protection for workers in the EU and most jurisdictions. Spur gears are a significant contributor to this noise \u2014 each loom contains 40\u201380 spur gears of various sizes, and their combined gear mesh frequency noise at 850 RPM \u00d7 20\u201340 teeth = 283\u2013567 Hz falls in the most hearing-sensitive frequency range of the human ear. The noise reduction benefit of upgrading from DIN 7 to DIN 5\u20136 quality class in the key loom pattern drive gears is typically 3\u20135 dB(A) at the operator position \u2014 a significant improvement at a cost premium of 20\u201335% per gear, but justified by the occupational health compliance and the operator comfort and productivity improvement in quieter working conditions.<\/p>\n

\"internal
Korea Ever-Power 20CrMnTi case carburized internal spur gear for weaving loom pattern drive application \u2014 M2, 64 teeth internal, bore 80 mm H7, HRC 60\u201362 tooth surface, DIN 6 quality class, profile tip relief 4 \u03bcm applied to reduce mesh impact at 750 RPM operation. The internal spur gear form is used in loom dobby and cam box drives because it provides a larger tooth contact ratio (and therefore lower noise) than an equivalent external gear pair in the same centre distance, and allows a more compact drive arrangement within the loom frame width. Housing: sealed aluminium with double-lip nitrile shaft seals and labyrinth gap on the yarn-side shaft entry to intercept fibre before it reaches the lip seal. Replacement for St\u00e4ubli, Grosse, and Bonas positive dobby internal gear sets on rapier and projectile looms.<\/figcaption><\/figure>\n<\/section>\n
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Textile Machine Application Drive Specifications<\/h2>\n
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APP 01<\/p>\n

RAPIER \/ AIR-JET
\nWEAVING LOOM<\/p>\n<\/div>\n

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Spur gear specification:<\/strong> M1\u2013M4, 20CrMnTi carburized, DIN 5\u20136, tip relief applied, fibre-excluding sealed housing, noise target <72 dB(A) gear contribution. Modern rapier weaving looms (Picanol OptiMax, Lindauer Dornier, Itema R9500) and air-jet looms (Toyota JAT810, Tsudakoma ZAX9100) use spur gear trains in three primary locations: the dobby or cam-box pattern drive (which controls the sequence of heddle frame movements to create the fabric pattern), the temple and selvedge drives, and the warp beam letoff and fabric takeup mechanisms. The pattern drive gears are the most noise-critical \u2014 they run at main shaft speed (up to 1,100 RPM for air-jet) and their mesh frequencies fall in the 280\u2013550 Hz range. Korea Ever-Power pattern drive spur gears are ground to DIN 5\u20136 with 4\u20136 \u03bcm tip relief on both driver and driven gears to eliminate the mesh entry impact impulse that generates the fundamental gear mesh noise component. Backlash in loom pattern drive spur gears must be controlled within 0.03\u20130.05 mm to prevent pattern registration error during the heddle frame direction reversals at each pick \u2014 any excess backlash allows the pattern drive to lose a fraction of a tooth pitch at the reversal, causing the fabric pattern to show a \u201cbeat\u201d defect at the repeat period of the reversal cycle.<\/p>\n<\/div>\n<\/div>\n

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APP 02<\/p>\n

RING SPINNING
\nFRAME<\/p>\n<\/div>\n

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Spur gear specification:<\/strong> M1.5\u2013M3, 20CrMnTi carburized or C45 induction hardened (for slower back roller and draft system gears), DIN 6\u20137, ultra-high cycle fatigue design with bending stress below endurance limit. Ring spinning frames (the dominant yarn production machine globally, producing the majority of cotton and polyester yarn used in woven and knitted fabrics) use spur gears to drive the drafting system rollers (which attenuate the fibre bundle from the roving to the yarn count), the flyer and bobbin drives, and the ring rail traverse. These gears run at moderate speed but for extremely long periods \u2014 a modern ring spinning frame operates 8,000+ hours per year and the drafting roller drive gears accumulate over 500 million load cycles within the first 18 months of operation. The ISO 6336 endurance limit approach to gear fatigue design is mandatory \u2014 tooth bending stress must remain below the material\u2019s endurance limit (not just the finite fatigue life at the calculated cycle count) to prevent infinite-life fatigue failure. Korea Ever-Power ring spinning frame spur gears are designed with a bending fatigue safety factor S_F \u2265 1.5 at the endurance limit tooth load, using 20CrMnTi case carburized to achieve the required endurance limit bending stress capacity.<\/p>\n<\/div>\n<\/div>\n

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APP 03<\/p>\n

WARP KNITTING
\nMACHINE<\/p>\n<\/div>\n

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Spur gear specification:<\/strong> M1\u2013M3, 20CrMnTi carburized, DIN 5\u20136 ground, low backlash \u22640.04 mm (for pattern guide bar synchronisation), noise <70 dB(A) gear mesh contribution. High-speed warp knitting machines (Karl Mayer, LIBA, Comez) produce tricot, lace, and technical textiles at 1,400\u20132,200 courses per minute, making them among the fastest-cycling textile machines. The guide bar drive spur gears must synchronise the lateral displacement of the yarn guide bars (which lay the yarn in the stitch pattern) with the mainshaft needle bar movement at millisecond precision \u2014 any deviation from the programmed lateral guide bar position at each course produces a visible pattern defect in the fabric. The spur gear train driving the pattern guide bars must therefore have extremely low transmission error and backlash \u2014 Korea Ever-Power guide bar drive spur gears for warp knitting machines are ground to DIN 5 and supplied with individual transmission error measurement below 4 \u03bcrad, with matched pairs at the guide bar drive pinion-wheel interfaces to confirm combined TE performance.<\/p>\n<\/div>\n<\/div>\n

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APP 04<\/p>\n

NONWOVEN
\nCARDING & DRAFTING<\/p>\n<\/div>\n

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Spur gear specification:<\/strong> M3\u2013M8, 42CrMo4 QT or 20CrMnTi carburized, DIN 7, wide face width for high torque at low speed, sealed housings with synthetic fibre-resistant lip seals. Nonwoven fabric production (spunbond, meltblown, needlepunch, hydroentanglement) uses heavy-duty spur gears in the carding machine and drafting roll drives, where the gear module is larger (M4\u2013M8) and the duty is heavier than in yarn-producing machinery. The carding machine uses spur gears to drive the main cylinder (60\u2013100 RPM, 3\u20138 kW per metre of working width) and the worker and stripper rolls at precisely controlled speed differentials \u2014 the ratio between the main cylinder and worker roll peripheral speed determines the fibre orientation in the web, which directly affects the strength anisotropy of the finished nonwoven fabric. Any speed ratio error from worn or inaccurate spur gears shifts the fibre orientation from the designed proportion, affecting the fabric\u2019s directional strength specification. Korea Ever-Power carding machine spur gears are supplied in matched sets with confirmed pitch accuracy to prevent speed ratio drift from tooth spacing error.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\"brass
Korea Ever-Power precision spur gear set for textile machinery pattern drive and timing applications. Small-module gears (M1\u2013M3) for textile applications are manufactured from brass CuZn39Pb3 for low-duty applications where corrosion resistance and non-magnetic properties are required (for use near fabric sensors and electronic pattern controllers), and from 20CrMnTi carburized steel for all high-cycle fatigue applications. The brass spur gears shown are used in loom dobby latch mechanisms and yarn measurement wheel drive trains where the gear operates in direct contact with yarn and fibre dust \u2014 brass is self-lubricating and non-abrasive to synthetic fibres, producing no metallic contamination that would show as a metallic sheen defect on woven white or light-coloured fabrics during subsequent dyeing processes.<\/figcaption><\/figure>\n<\/section>\n
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Fibre Contamination Prevention and Lubrication for Textile Machine Spur Gears<\/h2>\n

The prevention of fibre ingress into textile machine spur gear housings is an engineering challenge with no close parallel in other industries \u2014 the gear housing is surrounded by airborne fibres, fly, and dust that arise from the yarn and fabric processing, at concentrations that would be considered extreme in any other manufacturing environment. A weaving shed processing cotton fabric at 500 looms generates airborne fibre concentrations of 2\u20135 mg\/m\u00b3 in the machine zone \u2014 each cubic metre of air in the machine area contains enough fibre to fill the gear housing void of a loom pattern drive gearbox within weeks if the sealing is inadequate. These fibres, once inside the housing, absorb moisture from the oil and form compacted plugs in oil circulation passages, causing localised oil starvation and tooth surface scoring.<\/p>\n

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TEXTILE MACHINERY SPUR GEAR \u2014 FIBRE CONTAMINATION PREVENTION<\/p>\n

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SHAFT SEALING<\/p>\n