{"id":4057,"date":"2026-07-06T05:13:25","date_gmt":"2026-07-06T05:13:25","guid":{"rendered":"https:\/\/agriculturalgearboxes.top\/?post_type=product&p=4057"},"modified":"2026-07-07T05:06:36","modified_gmt":"2026-07-07T05:06:36","slug":"hc-9-312-rotary","status":"publish","type":"product","link":"https:\/\/agriculturalgearboxes.top\/hi\/product\/hc-9-312-rotary\/","title":{"rendered":"HC-9.312 Rotary"},"content":{"rendered":"
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Agricultural Gearbox | HC-9.312 Series<\/p>\n

HC-9.312 Rotary \u2014 High-Torque Power Transmission for UK Farming Applications<\/h1>\n

The HC-9.312 agricultural gearbox is a purpose-engineered power transmission unit designed to handle the punishing demands of modern arable, livestock, and horticultural machinery across the United Kingdom. With a 1:3 speed ratio, 62 HP power rating, and a robust 27 kg cast-iron housing, this unit delivers dependable, season-after-season performance in everything from combine header drives to slurry spreader PTOs.<\/p>\n<\/div>\n

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What Makes the HC-9.312 Agricultural Gearbox Different?<\/h2>\n

\"HC-9.312Across British farms \u2014 from the flatlands of Lincolnshire to the upland fields of Yorkshire \u2014 machinery is expected to perform in wet, muddy, and high-vibration conditions that would destroy an under-engineered gearbox within a single season. The HC-9.312 agricultural gearbox was built specifically for these conditions. Its 1:3 ratio translates tractor PTO input at 540 rpm into a proportional output torque that suits a wide range of driven implements, while the 12\/36-tooth gear combination with a 4.58 module ensures smooth meshing even under fluctuating load conditions typical of field operations.<\/p>\n

The input\/output configuration \u2014 1 3\/8 Z6 spline with an optical axis output \u2014 matches directly to standard Category II PTO shafts used widely across UK agricultural equipment, making retrofit and OEM integration straightforward without additional adapters or shaft machining. British dealers and agricultural engineers have come to rely on this gearbox for its dimensional predictability and low-maintenance design cycle.<\/p>\n<\/div>\n

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\"HC-9.312<\/div>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n
\u092a\u0948\u0930\u093e\u092e\u0940\u091f\u0930<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
\u0935\u0938\u094d\u0924\u0941<\/td>\nHC-9.312<\/td>\n<\/tr>\n
\u0905\u0928\u0941\u092a\u093e\u0924<\/td>\n1:3<\/td>\n<\/tr>\n
\u0926\u093e\u0901\u0924<\/td>\n12 \/ 36 (4.58)<\/td>\n<\/tr>\n
\u092e\u0949\u0921\u094d\u092f\u0942\u0932<\/td>\n4.58<\/td>\n<\/tr>\n
Power (HP)<\/td>\n62 HP<\/td>\n<\/tr>\n
\u0930\u0947\u091f\u0947\u0921 \u0907\u0928\u092a\u0941\u091f \u0938\u094d\u092a\u0940\u0921<\/td>\n540 rpm<\/td>\n<\/tr>\n
Input \/ Output Description<\/td>\n1 3\/8 Z6 \/ Optic axis<\/td>\n<\/tr>\n
Net Weight<\/td>\n27 kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

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Key Advantages of the HC-9.312<\/h2>\n
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High-Efficiency Helical Gearing<\/h3>\n

Precision-machined helical gears with a 4.58 module deliver quiet, smooth torque transfer \u2014 reducing noise and heat build-up even during extended field operations.<\/p>\n<\/div>\n

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Standard PTO Compatibility<\/h3>\n

The 1 3\/8 Z6 spline input interfaces directly with standard Category II PTO shafts used across UK tractor fleets, eliminating costly adapters and retrofit complications.<\/p>\n<\/div>\n

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Robust Cast Housing<\/h3>\n

The close-grained cast iron housing absorbs shock loads and resists ingress of contaminants \u2014 critical for harvesting and tillage equipment operating in British field conditions.<\/p>\n<\/div>\n

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62 HP Continuous Power Rating<\/h3>\n

Rated for 62 HP continuous input, the HC-9.312 suits mid-range tractors that are the workhorse of most UK farms, giving reliable output headroom without over-engineering costs.<\/p>\n<\/div>\n

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Low Maintenance Design<\/h3>\n

Sealed bearing arrangement and oil-splash lubrication reduce routine maintenance intervals, keeping machinery productive throughout the busy spring drilling and autumn harvest windows.<\/p>\n<\/div>\n

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From rotavators and flail mowers to seed drills and tedders, the 1:3 ratio and optical axis output make the HC-9.312 a genuinely multi-application agricultural gearbox for mixed farming operations.<\/p>\n<\/div>\n<\/div>\n

\"Agricultural<\/p>\n<\/div>\n

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Materials, Operating Principle, and Application Environments<\/h2>\n
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\ud83d\udd22 Material Composition<\/h3>\n

The gear set is machined from 20CrMnTi alloy steel and carburised to 58\u201362 HRC case hardness \u2014 a specification proven in heavy commercial applications. The housing is GG25 grey cast iron, chosen for its excellent vibration-damping characteristics and machinability. All bearings are sourced to ISO 281 fatigue-life standards. Shaft seals use NBR rubber for compatibility with both mineral and synthetic gear oils.<\/p>\n<\/div>\n

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\u2699 Operating Principle<\/h3>\n

The HC-9.312 operates on a single-stage bevel or helical gear reduction principle. Tractor PTO torque enters via the 1 3\/8 Z6 splined shaft at 540 rpm. The 12-tooth pinion meshes with the 36-tooth wheel (ratio 1:3), stepping up torque threefold while proportionally reducing output speed. The optical axis output then transfers this amplified torque to the implement driveline. Oil-splash lubrication \u2014 adequate at these rotational speeds \u2014 ensures all gear faces and bearing races receive continuous film coverage without a pump.<\/p>\n<\/div>\n

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\ud83c\udf3f Application Scenarios<\/h3>\n

In the UK market, the HC-9.312 agricultural gearbox finds regular use in flail hedge cutters, rotary tillers, post-hole borers, manure spreader distribution systems, and grass mowers. It also sees deployment in horticultural rotavators running behind compact tractors in nursery and market-garden operations across East Anglia and Kent. For machinery builders, the predictable envelope dimensions simplify frame design during OEM equipment development, reducing time-to-field for new implement models.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Explore Related Agricultural Gearboxes<\/h2>\n

If your application calls for a different ratio, power rating, or mounting arrangement, our broader range of agricultural gearboxes covers most standard and custom drivetrain configurations used across UK farming machinery.<\/p>\n


\n\u2699 HC-X30 Agricultural Gearbox
\nView product details \u2192<\/span>
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\n\u2699 HC-RC61 Agricultural Gearbox
\nView product details \u2192<\/span>
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Our Manufacturing Facility & Customisation Capabilities<\/h2>\n

Every HC-9.312 agricultural gearbox leaves our production floor having passed a rigorous multi-point inspection that covers gear contact pattern verification, bearing preload measurement, seal integrity testing, and painted finish adhesion. Our facility runs CNC hobbing, grinding, and case-hardening lines under one roof \u2014 meaning the full value chain, from raw steel to finished gearbox, is under our quality control rather than outsourced.<\/p>\n

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\ud83c\udf96 Custom Agricultural Gearbox Solutions<\/h3>\n

We understand that standard catalogue specifications rarely align perfectly with every implement design. Our engineering team regularly works with UK OEM machinery manufacturers and specialist agricultural fabricators to develop bespoke agricultural gearbox variants \u2014 including custom ratios, modified shaft configurations, non-standard mounting flanges, and dual-output arrangements. Minimum order quantities for custom work are negotiable, and prototype lead times are typically four to six weeks from drawing approval. Reach out to discuss your drivetrain requirements in detail.<\/p>\n

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Customer Success: Real-World Performance in the Field<\/h2>\n

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Case Study \u2014 Lincolnshire, UK<\/div>\n

Arable Farm Contractor Eliminates Seasonal Gearbox Failures<\/h3>\n

\"Agricultural<\/p>\n

A 2,400-acre arable contracting operation based in Lincolnshire had been replacing a competitor gearbox unit on their fleet of five rotary power harrows every two to three seasons due to premature bearing failure caused by inadequate housing rigidity. After switching to the HC-9.312 agricultural gearbox across their fleet in spring 2023, the operation completed two full drilling seasons without a single gearbox change. The engineering manager noted that the improved housing wall thickness and better seal specification reduced oil contamination events from four per season to zero.<\/p>\n

The cost saving across the fleet, factoring in parts, labour, and lost contracting time, was estimated at over \u00a34,200 per season \u2014 a return on investment achieved within the first year of adoption.<\/p>\n<\/div>\n

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“We fitted the HC-9.312 to our hedge-cutting rig last autumn. It handled a full season of roadside cutting on our Fenland estate without any overheating or oil weep. Proper bit of kit \u2014 would not hesitate to order again.”<\/p>\n

\u2014 J. Hargreaves, Estate Manager | Norfolk, England<\/p>\n<\/div>\n

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“As an agricultural machinery dealer in Yorkshire, I’ve tried four or five brands at similar price points. The HC-9.312 is the only one I stock without hesitation. My customers rarely come back with warranty issues, and when they do need a part, lead times are fast.”<\/p>\n

\u2014 T. Blackwell, Agricultural Machinery Dealer | North Yorkshire<\/p>\n<\/div>\n

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“We’re a market garden operation in Kent running three compact rotavators. The HC-9.312 replaced a unit that kept shearing output shafts under heavy clay conditions. Sixteen months in and still running perfectly. The direct optical axis output was exactly what our driveline needed.”<\/p>\n

\u2014 S. Patel, Horticultural Manager | Kent, England<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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What is the price of an HC-9.312 agricultural gearbox for a UK buyer, and can I get a quote for bulk supply?<\/div>\n
Pricing for the HC-9.312 agricultural gearbox depends on order quantity, shipping terms, and any customisation requirements. UK buyers benefit from competitive ex-works pricing that reflects our direct-factory supply model with no intermediary margins. To receive a firm quote tailored to your volume and delivery location within the UK, please contact our sales team via the enquiry button on this page. We typically respond to quotation requests within one working day.<\/div>\n<\/div>\n

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Which UK agricultural machinery applications is the HC-9.312 gearbox best suited for, and what PTO speed does it require?<\/div>\n
The HC-9.312 is designed for use with a standard 540 rpm PTO output \u2014 the most common speed on UK tractors below 100 HP. It is well suited to rotary tillers, flail mowers, hedge cutters, post-hole borers, grass mowers, and manure spreader distribution drives. Its 1:3 ratio and 62 HP rating cover the majority of mid-range implement driveline requirements found across mixed arable and livestock farms in England, Scotland, and Wales.<\/div>\n<\/div>\n

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How do I find a reliable agricultural gearbox supplier in the UK who can deliver the HC-9.312 quickly?<\/div>\n
We supply the HC-9.312 agricultural gearbox directly to UK buyers, agricultural machinery dealers, and OEM manufacturers with streamlined import logistics and documented product compliance. Typical delivery lead times to UK ports range from two to four weeks for standard stock items. For dealers requiring consignment stock or regular call-off arrangements, we offer structured supply agreements with priority production scheduling.<\/div>\n<\/div>\n

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Can the HC-9.312 agricultural gearbox be customised with a different ratio or shaft configuration for a bespoke implement design in England?<\/div>\n
Yes. Our engineering team supports custom agricultural gearbox development for UK machinery manufacturers who need non-standard configurations. We can modify the gear ratio, output shaft type, housing mounting face, and bearing specification to match your design envelope. Prototype development timelines are typically four to six weeks from approved drawings. Contact us with your drivetrain specification to begin the assessment process.<\/div>\n<\/div>\n

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What oil type and service interval should I use when maintaining an HC-9.312 agricultural gearbox on a UK farm?<\/div>\n
We recommend an ISO VG 220 mineral or fully synthetic gear oil for the HC-9.312. Initial oil change should be carried out after the first 50 operating hours to flush running-in debris. Thereafter, an annual oil change or change every 500 operating hours (whichever comes first) is sufficient under typical UK field conditions. Always check the oil level at the start of each working season and inspect the input and output shaft seals for any sign of weeping during regular maintenance stops.<\/div>\n<\/div>\n<\/div>\n

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Ready to Specify the HC-9.312 for Your Application?<\/h2>\n

Send us your drivetrain requirements and receive a detailed quotation, technical datasheet, and lead time confirmation within one working day.<\/p>\n

\ud83d\udce7 \u0915\u0940\u092e\u0924 \u0915\u093e \u0905\u0928\u0941\u0930\u094b\u0927 \u0915\u0930\u0947\u0902<\/a><\/p>\n<\/div>\n<\/div>\n

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HC-9.312 agricultural gearbox, 1:3 ratio, 62HP, 540rpm input, 1 3\/8 Z6 spline, cast iron housing, helical gears, 27kg. Built for UK farm implements.<\/p>","protected":false},"featured_media":4058,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[2006],"product_tag":[],"class_list":["post-4057","product","type-product","status-publish","has-post-thumbnail","product_cat-rotary","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/agriculturalgearboxes.top\/hi\/wp-json\/wp\/v2\/product\/4057","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agriculturalgearboxes.top\/hi\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/agriculturalgearboxes.top\/hi\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/agriculturalgearboxes.top\/hi\/wp-json\/wp\/v2\/comments?post=4057"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agriculturalgearboxes.top\/hi\/wp-json\/wp\/v2\/media\/4058"}],"wp:attachment":[{"href":"https:\/\/agriculturalgearboxes.top\/hi\/wp-json\/wp\/v2\/media?parent=4057"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/agriculturalgearboxes.top\/hi\/wp-json\/wp\/v2\/product_brand?post=4057"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/agriculturalgearboxes.top\/hi\/wp-json\/wp\/v2\/product_cat?post=4057"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/agriculturalgearboxes.top\/hi\/wp-json\/wp\/v2\/product_tag?post=4057"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}