The HC-9.310 agricultural gearbox is a precision-engineered power transmission solution designed for demanding field applications across the UK agricultural sector. Delivering 30HP at a 1:3 gear ratio with a rated input of 540 RPM, this unit is purpose-built to handle the torque loads associated with rotary cultivators, mowers, spreaders, and other PTO-driven implements. The 12/36 tooth configuration and a module of 3.45 translate to smooth, low-vibration power transfer — qualities that matter when you are working long shifts across variable terrain in British conditions.

With an input/output configuration of 13/8 Z6 and an optic axis option, the HC-9.310 agricultural gearbox suits a wide range of mounting orientations, giving machinery manufacturers and retrofit specialists flexibility that competing units rarely offer at this price point. Net weight of 18 kg keeps the assembly manageable for single-operator installation, while robust cast iron housing ensures the unit survives the moisture, mud, and temperature swings typical of UK harvest seasons.

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Gear Transmission Principle

The HC-9.310 agricultural gearbox operates on a single-stage helical gear mesh, where a 12-tooth driving pinion engages a 36-tooth output gear at module 3.45 to produce a precise 1:3 speed reduction. PTO shaft input at 540 RPM is stepped down while torque is multiplied, allowing implements to receive the high rotational force they need without over-stressing the tractor’s driveline. The optic axis output option means the rotational plane can be re-oriented during installation, making the unit compatible with both inline and offset drive layouts common on British farm machinery.

Materials & Construction

The housing is produced from high-grade cast iron — GG25 equivalent — machined to tight tolerances for gear alignment precision that directly affects noise, wear rate, and service life. Internal gears are manufactured from 20CrMnTi alloy steel, carburised and hardened to HRC 56–62, delivering surface hardness that resists pitting fatigue even under shock loading. All bearing seats are machined in a single clamping to maintain concentricity, and the unit is sealed with industrial-grade lip seals that retain gear oil in field environments where dust, crop debris, and water ingress are constant concerns for UK farmers.

Field Application Scenarios

This agricultural gearbox sees deployment across a broad range of UK crop and livestock operations. It powers the rotor assemblies of rotary tillers and power harrows used in autumn cultivation across the East Anglian arable belt. In grassland management, it drives drum mowers and flail mulchers on hill farms in Wales and the Scottish Borders. Fertiliser and lime spreaders fitted with ground-drive conveyor systems also rely on the 1:3 ratio to balance spreading width against material flow rate. Any application demanding a compact, bolt-on gearbox at the 30HP power band will find the HC-9.310 fits both dimensional and torque requirements without compromise.

✓ Compact Footprint

At 18 kg net weight, the unit retrofits to existing implement frames without structural modification, saving downtime during seasonal changeovers.

✓ High Torque Density

The hardened 20CrMnTi gear set delivers maximum torque output relative to unit volume, outperforming generic cast-steel alternatives in field endurance tests.

✓ Dual Output Flexibility

13/8 Z6 and optic axis outputs give integrators the freedom to route drive to either inline or angled implement shafts without additional adapter assemblies.

✓ Field-Sealed Design

Industrial-grade lip seals and precision-machined housing prevent oil leaks in wet, muddy operating environments — a common failure point in cheaper alternatives.

✓ 540 RPM PTO Compatibility

Factory-rated for standard 540 RPM PTO output found on tractors from 40HP upwards, ensuring plug-and-play compatibility across the majority of British farm fleets.

✓ Low Noise Operation

Precision gear lapping and consistent module sizing reduce mesh noise to levels that meet operator comfort expectations in enclosed cab environments.

HC-X30 Agricultural Gearbox

IL HC-X30 agricultural gearbox is designed for higher-power rotary applications requiring multi-speed outputs. It suits large-format cultivation machinery operating in the heavier clay soils found across much of the English Midlands and East Anglia, where tractor horsepower and ground engagement forces demand a robust gearbox platform.

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HC-RC61 Agricultural Gearbox

IL HC-RC61 agricultural gearbox is engineered specifically for rotary cutter and flail mower applications where shaft speed and cutting mass create high shock-load conditions. Its reinforced input flange and premium bearing arrangement make it a preferred choice for contractors maintaining roadside verges and land drainage channels across the UK.

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We spec the HC-9.310 agricultural gearbox into all our mid-range power harrow builds now. The dimensional consistency batch-to-batch is the biggest thing for us — we can’t afford to re-jig a production line because a casting dimension drifted. Not had a single dimensional reject in three years of purchasing.

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Ordered 12 units to cover a grassland contractor’s mower fleet in Dumfries. The 540 RPM compatibility was essential — some of those tractors are older John Deere 6-series with no 1,000 RPM option. All 12 went in without a single fitment issue. The quote turnaround from your team was also genuinely fast, which matters when we’re working to a season deadline.

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We integrated the HC-9.310 agricultural gearbox into our lime spreader ground-drive conversion kits. The 1:3 ratio sits exactly in the sweet spot for the spreading rate we target on heavy chalk soils in Kent. We’ve had units in continuous use for two full seasons now — the seals are holding, the noise level is low, and our customers haven’t called back once for warranty work.