{"id":1870,"date":"2026-07-20T05:37:19","date_gmt":"2026-07-20T05:37:19","guid":{"rendered":"https:\/\/gearrack.top\/?p=1870"},"modified":"2026-07-20T05:37:19","modified_gmt":"2026-07-20T05:37:19","slug":"bevel-gears-for-agricultural-machinery","status":"publish","type":"post","link":"https:\/\/gearrack.top\/fr\/bevel-gears-for-agricultural-machinery\/","title":{"rendered":"Bevel Gears for Agricultural Machinery"},"content":{"rendered":"
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GEAR APPLICATION GUIDE \u00b7 BEVEL GEAR \u00b7 B03<\/span><\/p>\n

Bevel Gears for Agricultural Machinery:
\nPTO Drives, Gearboxes and Combine Harvesters<\/span><\/h1>\n

Agricultural machinery uses bevel gears in nearly every power transmission application requiring a change of shaft direction \u2014 from tractor PTO angle gearboxes to combine harvester header drives, mower conditioner right-angle gearboxes, and seeder distribution drives. This guide covers bevel gear material selection, duty cycle design, shock loading service factors, and maintenance requirements for the full range of agricultural bevel gear applications.<\/p>\n

C45 \u00b7 20CrMnTi \u00b7 SCM420H \u00b7 Ductile Iron<\/span>
\nPTO 540 \u00b7 1,000 RPM \u00b7 M4\u2013M10<\/span>
\nTractor \u00b7 Combine \u00b7 Mower \u00b7 Seeder<\/span><\/div>\n<\/div>\n<\/div>\n
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PTO INPUT SPEED<\/p>\n

540 \/ 1,000 RPM<\/p>\n

Two standard tractor PTO output speeds: 540 RPM (older implements, light duty), 1,000 RPM (modern implements, higher power). European standard ISO 500. Gear ratios in the bevel gearbox set the final output speed<\/p>\n<\/div>\n

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SHOCK SERVICE FACTOR<\/p>\n

1.5 \u2013 3.0<\/p>\n

Agricultural implement bevel gears experience severe intermittent shock loads \u2014 rock strikes in mowers and tillers, crop plugging in harvesters, and hydraulic pressure surges \u2014 requiring high service factors vs steady industrial drives<\/p>\n<\/div>\n

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MODULE RANGE<\/p>\n

M4 \u2013 M10<\/p>\n

Agricultural bevel gear module range. Light implements: M4\u2013M6. Medium tractor implements: M6\u2013M8. Heavy combine harvester and large PTO bevel gears: M8\u2013M10<\/p>\n<\/div>\n

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ANNUAL DUTY<\/p>\n

200\u2013800 h\/yr<\/p>\n

Agricultural machinery seasonal use \u2014 much lower annual operating hours than industrial drives, but concentrated in short seasons with high-intensity shock loading and limited maintenance attention between seasons<\/p>\n<\/div>\n<\/div>\n

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Bevel Gears in Agricultural Power Transmission<\/h2>\n

Agricultural machinery relies on bevel gears to redirect power from the tractor PTO shaft (rotating at 540 or 1,000 RPM on a longitudinal axis) to the driven implement components which almost always require transverse or perpendicular shaft arrangements \u2014 cutter blades rotating on horizontal or vertical transverse axes, spreader discs on vertical shafts, header augers on horizontal shafts perpendicular to the direction of travel. The 90\u00b0 bevel gear right-angle drive is the standard solution for every one of these direction changes, and agricultural machinery uses more bevel gears per machine than almost any other equipment category.<\/p>\n

Korea Ever-Power’s bevel gears for agricultural machinery<\/a> cover straight bevel gears (M4\u2013M10, for the large majority of agricultural PTO implement applications where speed is moderate and noise is not a concern) and spiral bevel gears (for high-speed or high-power agricultural drives where the noise and load capacity advantages justify the additional cost). Materials range from C45 induction hardened (light-duty seasonal implements) through 20CrMnTi case carburized (heavy combines, large PTO gearboxes) to ductile iron (large-diameter slow-speed bevel gears where casting vs machining reduces cost).<\/p>\n

The most important design difference between agricultural and industrial bevel gears is the service factor. Agricultural machinery operates in short seasons with unavoidable shock loading \u2014 a mower bevel gearbox hitting a concealed stone at operating speed produces a torsional shock 5\u201310\u00d7 the normal running torque. A combine harvester header drive bevel gear experiences severe impact every time a heavily cropped row plugs the intake. These shock events dominate the fatigue life of agricultural bevel gears and require service factors of 1.5\u20133.0 rather than the 1.0\u20131.25 used for smooth industrial drives.<\/p>\n

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C45 Induction Hardened<\/h3>\n

Standard for light and medium agricultural implement bevel gears \u2014 rotary mower right-angle gearboxes, fertiliser spreader drives, small seeders and cultivators. HRC 48\u201354 tooth surface, good impact resistance from the unhardened core. Annual replacement is economically practical and often specified as a maintenance item for high-wear implements, making lower first cost more important than maximum fatigue life. Korea Ever-Power keeps C45 induction-hardened agricultural bevel gears in standard sizes in stock for fast replacement supply.<\/p>\n

\u2713 Light implements \u00b7 seasonal replacement<\/p>\n<\/div>\n

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20CrMnTi Case Carburized<\/h3>\n

For heavy-duty agricultural bevel gears in combine harvester header drives, large PTO angle gearboxes above 100 kW, and tractor front axle bevel drive sets. Case depth 0.8\u20131.2 mm, HRC 58\u201362 tooth surface, ductile core absorbs shock loading. Service life 3\u20135 seasons at full operating duty vs 1 season for C45 alternatives in heavy combine applications. Korea Ever-Power supplies 20CrMnTi agricultural bevel gear sets for combine header drive gearbox replacement and OEM supply to European and North American agricultural OEM programmes.<\/p>\n

\u2713 Combine harvester \u00b7 heavy PTO gearbox<\/p>\n<\/div>\n

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SCM420H \/ SAE 8620<\/h3>\n

Preferred by European and North American combine and tractor OEMs who specify international steel grades rather than Chinese GB grades. Functionally equivalent to 20CrMnTi for agricultural bevel gear duty. Case carburized, HRC 58\u201362. Korea Ever-Power manufactures agricultural bevel gears in SCM420H and SAE 8620 for OEM programmes requiring JASO or SAE material certification rather than GB\/T material standards \u2014 common for supply into John Deere, CNH, AGCO, and Claas tier-1 supplier qualification programmes.<\/p>\n

\u2713 European \/ North American OEM programmes<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Agricultural Implement Applications<\/h2>\n
\"tractor
Korea Ever-Power OEM customised tractor and agricultural machinery bevel gears \u2014 20CrMnTi case carburized, M6, straight bevel, ratio 1.5:1, 90\u00b0 shaft angle, for tractor-mounted rotary tiller and mower conditioner PTO right-angle gearbox. HRC 60\u201362 tooth surface, matched set with contact pattern test before shipment. Service factor 2.5 applied to rated PTO power to account for rock-strike shock loading. Annual production volumes up to 50,000 sets per SKU for European and Asian agricultural OEM customers. Individual traceability stamping on each gear for warranty recall management.<\/figcaption><\/figure>\n
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APP 01<\/p>\n

ROTARY MOWER
\n& CONDITIONER<\/p>\n<\/div>\n

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Bevel gear specification:<\/strong> M4\u2013M7, C45 induction hardened or 20CrMnTi, straight bevel, ratio 1:1 to 2:1, 90\u00b0 shaft angle, service factor 2.0\u20132.5. The rotary mower right-angle gearbox is the highest-volume agricultural bevel gear application worldwide. The bevel gear set must absorb the full energy of a cutter blade impacting a rock or heavy soil obstruction \u2014 a single rock strike at rated blade speed can produce a peak torque 8\u201312\u00d7 the normal running torque. Slip clutches or shear bolts are fitted upstream of the bevel gearbox to limit this peak, but the bevel gears must still absorb the residual shock after the clutch trips. Korea Ever-Power supplies matched bevel gear sets for all standard mower gearboxes including replacement for Comer, Bondioli&Pavesi, Walterscheid, and Brevini mower gearbox models.<\/p>\n<\/div>\n<\/div>\n

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APP 02<\/p>\n

COMBINE
\nHARVESTER HEADER<\/p>\n<\/div>\n

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Bevel gear specification:<\/strong> M6\u2013M10, 20CrMnTi or SCM420H case carburized, straight or spiral bevel, ratio 1:1 to 3:1, input from header drive shaft at 1,000 RPM PTO derivative speed, service factor 2.0\u20133.0. Combine harvester header drive bevel gearboxes power the cutting platform auger, reel, and knife drives simultaneously. Header plugging events \u2014 when heavy wet crop blocks the intake \u2014 create peak torques that must be absorbed by the bevel gear without tooth fracture. The seasonal nature of combine harvesting (600\u20131,000 hours maximum per year) means gear replacement between seasons is commercially acceptable; the key requirement is reliable completion of each harvesting season without field failure. Korea Ever-Power supplies bevel gear sets for all major combine header gearbox series including John Deere, Case IH, New Holland, Claas Lexion, and AGCO Gleaner models.<\/p>\n<\/div>\n<\/div>\n

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APP 03<\/p>\n

ROTARY TILLER
\n& CULTIVATOR<\/p>\n<\/div>\n

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Bevel gear specification:<\/strong> M5\u2013M8, C45 induction hardened or 20CrMnTi, straight bevel, service factor 2.5\u20133.0, centre bevel gearbox plus side bevel output gearboxes. The rotary tiller (rotavator) has the most severe shock loading duty of any PTO-driven implement \u2014 every pass through stony soil produces multiple rock-strike events, each generating torsional peaks several times the rated torque. Rotary tiller bevel gears are among the highest-wear agricultural gear components and are routinely replaced as a scheduled service item at the start of each cultivation season. The centre gearbox bevel gear set (receiving full PTO power and distributing to the rotor shaft) is the highest-loaded position; the side output bevel gears (redirecting rotor shaft power to the tiller tine shafts) are subject to the highest frequency of individual shock events per hour of operation.<\/p>\n<\/div>\n<\/div>\n

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APP 04<\/p>\n

SEEDER &
\nSPREADER DRIVES<\/p>\n<\/div>\n

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Bevel gear specification:<\/strong> M4\u2013M6, C45 normalised or induction hardened, straight bevel, ratio 1:1 to 4:1, service factor 1.5 (smooth spreading duty). Precision seeders and fertiliser spreaders use smaller bevel gears than mowers and tillers \u2014 the seed metering mechanisms and spinner discs are low-torque applications driven from PTO at reduced speed through the bevel gearbox. The service factor for spreader bevel gear drives is lower than for impact-type implements because fertiliser and seed do not produce rock-strike shock loads. Stainless steel or hot-dip galvanised cast iron housings are specified for corrosive fertiliser environments. Korea Ever-Power supplies plastic bevel gears<\/a> in POM and nylon for small precision seeder distribution drives below 0.5 kW where corrosion resistance and self-lubrication are priorities over load capacity.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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Frequently Asked Questions<\/h2>\n
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Q 01<\/span><\/p>\n

How often should I replace the bevel gear set in a rotary mower gearbox, and what are the wear signs to watch for?<\/p>\n<\/div>\n

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Rotary mower bevel gear replacement interval depends on operating conditions: (1) Light duty (grass, no stones):<\/strong> inspect after each season, replace every 3\u20135 seasons or when wear signs appear. (2) Heavy duty (rough grass, stones, stubble):<\/strong> inspect mid-season, replace every 1\u20132 seasons as a planned maintenance item \u2014 the cost of a field gear failure (emergency call-out, harvesting delay) far exceeds the cost of preventive gear replacement. Wear signs to watch for: (a) Increased backlash \u2014 rock the blade by hand with the gearbox static; more than 2\u20133\u00b0 of free rotation before the wheel engages the pinion indicates worn tooth flanks; (b) Metallic particles in the gear oil (check oil colour and particle content at each season-end service); (c) Gear oil temperature above 80\u00b0C in operation (indicates excessive friction from worn tooth surfaces); (d) Noise \u2014 a new low-frequency rumble in addition to normal mowing sound typically indicates onset of tooth pitting or bevel gear bearing wear. Korea Ever-Power supplies seasonal replacement bevel gear sets for all common mower gearbox models with agricultural season service stock available for immediate dispatch.<\/p>\n<\/div>\n<\/div>\n

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Q 02<\/span><\/p>\n

Can Korea Ever-Power supply bevel gears to fit existing Comer, Walterscheid, or Bondioli&Pavesi agricultural gearboxes?<\/p>\n<\/div>\n

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Yes \u2014 Korea Ever-Power regularly supplies agricultural bevel gear replacement sets cross-referenced to Comer (Italy), Walterscheid (Germany\/USA), Bondioli&Pavesi (Italy), Reggiana Riduttori, and Chinese-origin agricultural gearboxes. The cross-reference process: customer provides the gearbox model number (from the gearbox nameplate or the implement manual) and Korea Ever-Power identifies the correct bevel gear set from the reference database. If the model number is unavailable, provide the measurements: module (or OD and tooth count for calculation), cone distance, shaft angle (90\u00b0 for most PTO gearboxes), bore, keyway, and helix hand (left or right, for spiral bevel). Lead time for standard cross-referenced agricultural bevel gear sets: 7\u201315 days. For rare or obsolete models: 20\u201335 days from measurement confirmation. Agricultural season emergency stock for common mower and tiller gearbox bevel sets is maintained year-round for rapid dispatch to all major agricultural markets including Australia, UK, Netherlands, Germany, France, and North America.<\/p>\n<\/div>\n<\/div>\n

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Q 03<\/span><\/p>\n

What lubrication is correct for a PTO implement bevel gearbox?<\/p>\n<\/div>\n

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Most PTO implement right-angle bevel gearboxes use SAE 80W-90 GL-4 or GL-5 gear oil \u2014 check the implement manual for the specific specification, as some agricultural gearbox manufacturers prohibit GL-5 EP oil in gearboxes containing yellow metal (bronze or brass) thrust washers or bushings (GL-5 EP additives can attack copper alloys). Typical fill quantities: small mower gearbox 0.15\u20130.30 litres; medium tiller gearbox 0.3\u20130.8 litres; large PTO gearbox 0.5\u20131.5 litres. Check oil level before each season and after any rock-strike event that caused temporary stop \u2014 impact events can froth the oil and partially push it out through the breather. Drain and refill with fresh oil after every 200\u2013300 operating hours or at the end of the season, whichever comes first. Use food-grade oil (NSF H1 SAE 80W-90) for bevel gearboxes on vegetable crop implements where oil leakage risk could contact food produce.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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Explore Korea Ever-Power Gear Categories<\/h2>\n

Seven precision gear product lines for agricultural, industrial, automotive and specialist applications worldwide.<\/p>\n<\/div>\n

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\"spur<\/p>\n
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Spur Gears<\/a><\/p>\n

M1\u2013M20 \u00b7 tractor transmission \u00b7 20CrMnTi<\/p>\n<\/div>\n<\/div>\n

\"helical<\/p>\n
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Helical Gears<\/a><\/p>\n

Low noise \u00b7 gearbox \u00b7 agricultural machinery<\/p>\n<\/div>\n<\/div>\n

\"bevel<\/p>\n
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Engrenages coniques<\/a><\/p>\n

PTO right-angle \u00b7 mower \u00b7 combine \u00b7 tiller<\/p>\n<\/div>\n<\/div>\n

\"worm<\/p>\n
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Worm Gears<\/a><\/p>\n

High ratio \u00b7 self-locking \u00b7 valve, hoist<\/p>\n<\/div>\n<\/div>\n

\"ring<\/p>\n
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Ring Gears<\/a><\/p>\n

Internal \u00b7 planetary \u00b7 tractor final drive<\/p>\n<\/div>\n<\/div>\n

\"planetary<\/p>\n
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Planetary Gears<\/a><\/p>\n

Compact \u00b7 high torque \u00b7 tractor hub reduction<\/p>\n<\/div>\n<\/div>\n

\"plastic<\/p>\n
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Plastic Gears<\/a><\/p>\n

POM \u00b7 Nylon \u00b7 seeder \u00b7 self-lubricating<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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GET A QUOTATION \u00b7 KOREA EVER-POWER<\/p>\n

Need Bevel Gears for Agricultural Machinery?<\/h2>\n

Korea Ever-Power supplies C45, 20CrMnTi, SCM420H, and SAE 8620 bevel gears for all agricultural PTO implement applications \u2014 mowers, tillers, combine harvesters, seeders and spreaders. Cross-reference supply for Comer, Walterscheid, Bondioli&Pavesi and all major gearbox brands. Seasonal agricultural stock for immediate dispatch. OEM production for John Deere, CNH, AGCO, and Claas tier-1 supplier programmes. ISO 9001:2015 quality documentation included.<\/p>\n

Request a Quotation \u2192<\/a><\/p>\n<\/div>\n<\/div>\n

\u00c9diteur : Cxm<\/em><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

GEAR APPLICATION GUIDE \u00b7 BEVEL GEAR \u00b7 B03 Bevel Gears for Agricultural Machinery: PTO Drives, Gearboxes and Combine Harvesters Agricultural machinery uses bevel gears in nearly every power transmission application requiring a change of shaft direction \u2014 from tractor PTO angle gearboxes to combine harvester header drives, mower conditioner right-angle gearboxes, and seeder distribution drives. […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[4566],"tags":[],"class_list":["post-1870","post","type-post","status-publish","format-standard","hentry","category-application-of-gears"],"_links":{"self":[{"href":"https:\/\/gearrack.top\/fr\/wp-json\/wp\/v2\/posts\/1870","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gearrack.top\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gearrack.top\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gearrack.top\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gearrack.top\/fr\/wp-json\/wp\/v2\/comments?post=1870"}],"version-history":[{"count":1,"href":"https:\/\/gearrack.top\/fr\/wp-json\/wp\/v2\/posts\/1870\/revisions"}],"predecessor-version":[{"id":1872,"href":"https:\/\/gearrack.top\/fr\/wp-json\/wp\/v2\/posts\/1870\/revisions\/1872"}],"wp:attachment":[{"href":"https:\/\/gearrack.top\/fr\/wp-json\/wp\/v2\/media?parent=1870"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gearrack.top\/fr\/wp-json\/wp\/v2\/categories?post=1870"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gearrack.top\/fr\/wp-json\/wp\/v2\/tags?post=1870"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}