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agriculturalgearboxes.top · UK Agricultural Drive Technology · Est. Custom Engineering
Feed Mixer Gearbox C3A — 1:1 & 1.8:1
Direct Replacement for Comer Code C3A · 92 kW / 540 RPM Rated · Cast Iron Housing · UK Supply
Purpose-Built Power Transmission for UK Mixing Wagons
When the original Comer C3A gearbox on your mixing wagon reaches the end of its service life, the choice of replacement directly determines how long your operation runs without unplanned downtime. The Feed Mixer Gearbox C3A supplied by agriculturalgearboxes.top is a precision-engineered drop-in replacement that matches every critical dimension, shaft specification, and performance parameter of the original Comer Code C3A unit. Available in both the 1:1 gear ratio for balanced speed and torque output and the 1.8:1 ratio for demanding, high-torque total mixed ration applications, this feed mixer gearbox meets the full range of requirements encountered by livestock, dairy, and mixed-arable operations across England, Scotland, Wales, and Northern Ireland. It is rated to a maximum input power of 92 kW at 540 RPM, making it fully compatible with the PTO output of modern mid-range tractors commonly operated on British farms. The cast iron housing brings the structural rigidity and corrosion resistance that UK field conditions demand, and both connection shafts are machined to 1‑3/4 inch outside diameter with 20 splines — the exact Comer original specification — ensuring a clean first-fit installation without modification or adapters.
Verified compatibility with machine and vehicle brands including Aksa, DAF Agro, Falke Maschinenbau, Euromilk, and Metal-Fach makes the C3A gearbox a reliable choice for a wide cross-section of the UK’s mixing wagon fleet. The unit is delivered dry, ready for SAE 90 gear oil — widely stocked by British agricultural merchants — and comes with a clearly documented maintenance schedule designed to protect the gearbox investment across years of demanding seasonal service.
Technical Specifications at a Glance
Every workshop engineer and purchasing officer specifying a C3A replacement needs full parameter visibility before committing to a supplier. The table below consolidates the rated mechanical data, connection geometry, lubrication requirements, and machine compatibility for this feed mixer gearbox. These figures are directly aligned with the original Comer C3A factory specification, allowing confident selection without the need for prototype testing or dimensional verification on arrival.
| Parametri | Tekniset tiedot |
|---|---|
| Malli | C3A (Comer C-3A Replacement) |
| Available Gear Ratios | 1:1 / 1.8:1 |
| Suurin tuloteho | 92 kW |
| Max. Input Rotation Speed | 540 r/min |
| Kotelon materiaali | Valurauta |
| Connection Type (Both Shafts) | Splined |
| Connection Outside Diameter | 1-3/4 inch (both connections) |
| Number of Splines | 20 (both connections) |
| Oil Grade (SAE Viscosity) | SAE 90 |
| Ensimmäinen öljynvaihtoväli | 50 – 70 operating hours |
| Seuraava öljynvaihtoväli | Every 500 – 700 hours or annually |
| Compatible Machine Brands | Aksa, DAF Agro, Falke Maschinenbau, Euromilk, Metal-Fach |
| Hakemus | Mixing Wagon (TMR, silage, fertiliser blending, soil amendment) |
| Toimitetaan öljyn kanssa | No — order SAE 90 oil separately |
Dimensional Drawing — C3A Feed Mixer Gearbox
Why UK Operators Specify This Feed Mixer Gearbox
Replacing a failed or worn Comer C3A vaihdelaatikko during the feeding season is a high-stakes task. A poorly matched aftermarket unit can fail within weeks, stranding the wagon mid-season and forcing costly emergency repairs at exactly the wrong time. The C3A feed mixer gearbox from agriculturalgearboxes.top is designed to eliminate that risk. It is built to the same dimensional and performance standard as the OEM unit it replaces, tested under load before despatch, and supported by a technical team with over 18 years of specialised experience in agricultural power transmission. Below are the defining characteristics that set this gearbox apart from lower-specification alternatives available in the UK aftermarket.
Dual Gear Ratio Flexibility
Select the 1:1 ratio for standard blending duty, or switch to 1.8:1 when maximum torque is needed for dense silage, straw bale, or TMR loads. Both share identical mounting geometry, so the correct ratio can be specified at the point of order without any engineering changes on the wagon.
Cast Iron Housing Built for UK Conditions
The cast iron housing absorbs the vibration, thermal cycling, and impact loads that come with year-round UK farm operation. It retains structural integrity in the wet, muddy, and chemically active environments typical of British livestock yards, offering substantially longer surface life than aluminium-cased alternatives.
92 kW Rated Power Headroom
Rated to 92 kW input power at 540 RPM, this gearbox comfortably handles the full PTO output of the mid-range tractors most commonly paired with mixing wagons on UK farms. There is no need to de-rate the tractor or manage PTO slip to protect the gearbox during intensive mixing cycles.
Multi-Brand Machine Compatibility
Confirmed fitment on Aksa, DAF Agro, Falke Maschinenbau, Euromilk, and Metal-Fach mixing wagons eliminates guesswork at installation. If your machine is one of these makes, the gearbox drops directly into place using the existing mounting points and shaft connections, with no additional fabrication required.
Precision-Machined Splined Shafts
Input and output shafts are CNC-machined to 1-3/4 inch OD with 20 splines, matching the Comer C3A original to the micron. This level of dimensional accuracy eliminates shaft play, reduces drivetrain vibration, and extends bearing and seal life considerably compared with loosely-toleranced aftermarket copies.
Simple, Low-Cost Maintenance Schedule
The first oil change at 50 to 70 hours is quickly completed, and subsequent intervals of 500 to 700 hours align neatly with a pre-winter service schedule on most UK livestock farms. SAE 90 gear oil is available from virtually every agricultural merchant in England, Scotland, and Wales, keeping servicing costs predictable and low.
Where the C3A Gearbox Is Relied Upon Across UK Agriculture
Across the UK, the feed mixer gearbox C3A earns most of its operating hours in total mixed ration preparation, where dairy and beef units demand a single, consistent blend of forages, grains, protein meals, minerals, and liquid additives per day. In this application, the 1.8:1 gear ratio option is particularly valued because it provides the additional mechanical advantage needed to break open whole bales and process high dry matter silage without stalling the PTO. Beyond TMR, the C3A gearbox is regularly specified for silage processing wagons, where the cast iron housing resists the aggressive moisture and organic acids present in fermented forage materials, and for fertiliser blending rigs, where granular or powdered inputs must be uniformly distributed before field application. Agricultural contractors operating throughout Scotland and Northern England put the C3A to work in soil amendment mixers that combine compost, lime, and mineral supplements ahead of spring cultivation. The thread connecting all these applications is the gearbox’s ability to sustain torque delivery under variable, often unpredictable load conditions that characterise real-world farm operation, without requiring operator intervention between tasks.
🌿 TMR Feed Mixing
Balanced nutrition delivery for dairy and beef herds, 1:1 or 1.8:1 ratio selected to suit ration dry matter content.
🌿 Silage Processing
Corn, grass, and legume silage handled under high torque at 1.8:1, with cast iron housing resisting fermentation moisture.
⚙️ Fertiliser Blending
Uniform granular mixing ahead of field application, common on arable and mixed-farming operations across East Anglia and the Midlands.
🌿 Soil Amendment Mixing
Compost, lime, and mineral supplement blending for improved soil fertility ahead of spring drilling, used by contractors across Scotland and Northern England.
Customer Success Stories from UK Agricultural Operations
Dairy TMR Operation
Thornbury Livestock, Wensleydale — 450-Cow Holstein Unit
The original Comer C3A gearbox on Thornbury Livestock’s Metal-Fach mixing wagon failed in February 2023, mid-way through the winter feeding period, after seven years of intensive daily service. The farm manager contacted agriculturalgearboxes.top directly, specified a C3A replacement at the 1.8:1 ratio, and received the unit within three working days. Workshop staff completed the installation in under two hours using existing tools and no machined modifications. The wagon has since completed two full winter feeding cycles, processing an average of 14 tonnes of TMR per day at peak demand. The farm manager noted a measurable reduction in drivetrain vibration compared with the previous unit, and reported that the SAE 90 oil maintenance schedule integrates easily into the farm’s standard pre-season service.
Agricultural Contracting
Caledonian Agri Services, Perthshire — Contract Feed Mixing Across 12 Farms
Caledonian Agri Services operates a contract feed mixing service across 12 farms in Perthshire and Angus, running Euromilk wagons up to ten hours per day during the winter months. A previous aftermarket gearbox failed catastrophically at just 300 operating hours, disrupting client schedules and triggering an urgent replacement search. The company switched to the C3A gearbox from agriculturalgearboxes.top and has since logged over 1,200 hours across 14 months of commercial contracting. Two oil changes have been completed on schedule. The operations director specifically noted that the cast iron housing showed no surface degradation despite sustained exposure to the wet, acidic conditions characteristic of Scottish lowland silage yards — a persistent weakness in the previously fitted aluminium-housed unit.
Mixed Beef & Arable
Brynmor Farm Supplies, Carmarthenshire — Dual-Season Mixer Wagon Use
Brynmor Farm Supplies manages 200 head of beef cattle alongside 600 acres of arable ground in South Wales. Their DAF Agro mixer wagon serves a dual function: cattle TMR preparation throughout autumn and winter, and fertiliser granule blending ahead of spring drilling. This unusual combination of applications places varied demands on the gearbox across the calendar year. A C3A gearbox at the 1:1 ratio was sourced in 2022, and after 18 months of dual-purpose operation the unit remains in perfect working order, handling both light granular blending and dense forage mixing without overheating or unusual noise. The owner noted that the clearly documented SAE 90 oil specification allowed the local agricultural merchant in Llandeilo to supply the correct lubricant immediately, without delays caused by ambiguous or incomplete product documentation.
Pairing Your C3A Gearbox with the Right Agricultural PTO Shaft
The feed mixer gearbox C3A receives its drive from the tractor PTO, and the quality of that connection matters as much as the gearbox itself. A PTO shaft that is poorly matched in length, joint angle, or torque rating introduces vibration and wear that reduces gearbox service life regardless of how well the C3A is built. Our agricultural PTO shafts are available in lengths suited to the full range of hitch and wagon configurations common across UK farm machinery, and all units are supplied with correctly rated universal joints and compliant shielding to satisfy UK health and safety requirements for PTO-driven equipment. If you are replacing the C3A gearbox as part of a broader drivetrain refurbishment, specifying a matched PTO shaft at the same time ensures the complete system operates within its design parameters from day one, maximising both efficiency and service life across the following feeding seasons.
Manufacturing Precision & Custom Engineering Capability
Every C3A feed mixer gearbox that leaves our facility is the product of over 18 years of focused engineering in agricultural power transmission. Our production lines use CNC machining centres calibrated to micron-level tolerances, with gear sets cut from high-alloy steel and thermally treated for the hardness and fatigue resistance required in heavy agricultural drivetrain applications. Bearing housings, shaft bores, and spline profiles are all dimensionally inspected at each machining stage. Each finished unit is tested under load before packing, so the performance data it carries on arrival matches what it will deliver in service on your mixing wagon. This is not a warehoused commodity product; it is a manufactured component held to a defined quality standard at every production step.
Beyond the standard C3A supply, our engineering team provides a comprehensive custom gearbox design service for applications where a catalogue unit does not match the specific requirements of a machine or platform. Custom options available to UK agricultural machinery manufacturers, OEM integrators, and specialist wagon builders include alternative gear ratios, modified shaft diameters, non-standard spline counts, extended or shortened housings, adapted mounting flanges, and sealed configurations for particularly aggressive operating environments. We can supply engineering drawings, 3D CAD files, material certification, and prototype units within agreed lead times. Whether you need a small batch of modified gearboxes for a fleet rebuild programme or a long-term supply agreement for a new wagon model entering the UK market, our production capacity and engineering resource are ready to support your programme from specification through to series delivery.
C3A Gearbox In the Field
Usein kysytyt kysymykset
What is the best feed mixer gearbox to replace an original Comer C3A unit on a mixing wagon used in UK livestock farming?
The direct replacement is a C3A feed mixer gearbox matched to the same gear ratio as the original — 1:1 for standard duty or 1.8:1 if your wagon handles dense TMR or bale silage. Our unit shares the identical spline specification (1-3/4 inch, 20 splines) and housing dimensions as the Comer C-3A original, meaning installation is straightforward for any competent farm workshop team in England, Scotland, Wales, or Northern Ireland without additional machining or adapters.
How much does a Comer C3A replacement feed mixer gearbox cost, and where can I get a price quote for supply to my UK agricultural operation?
Pricing depends on gear ratio, order quantity, and any customisation required. We supply single replacement units and batch orders to UK farming operations, agricultural contractors, and machinery dealers throughout Great Britain and Northern Ireland. To receive a prompt, accurate quotation, email [email protected] with your wagon make and model, the gear ratio required, and your delivery location. Our technical sales team aims to respond to all UK enquiries within one working day.
Which gear ratio — 1:1 or 1.8:1 — should I specify for a TMR mixing wagon on a high-output UK dairy farm?
For wagons processing heavy, high dry matter loads such as whole bale silage or straw-based TMR rations, the 1.8:1 ratio is the stronger choice because it delivers significantly greater auger torque at the same PTO input speed. Where the wagon primarily handles pre-chopped or pre-processed lighter materials, the 1:1 ratio provides adequate output at a slightly higher auger speed. If you are unsure, contact our engineers with your wagon model, typical load volume, and tractor PTO horsepower and we will advise the correct specification for your operation.
Where can I find a trusted UK supplier of agricultural feed mixer gearboxes compatible with Euromilk or Metal-Fach mixing wagons?
agriculturalgearboxes.top supplies C3A feed mixer gearboxes directly to UK farming operations and machinery dealers, with confirmed compatibility for Euromilk, Metal-Fach, Aksa, DAF Agro, and Falke Maschinenbau wagons. We handle enquiries from across the UK, including remote locations in the Scottish Highlands, mid-Wales, and Northern Ireland. Send your machine details and delivery address to [email protected] and we will confirm availability and lead time promptly.
How often should I change the oil in my C3A feed mixer gearbox, and what grade of oil is recommended for UK farming conditions throughout the year?
The specified lubricant is SAE 90 gear oil, available from most UK agricultural merchants. The first oil change should be done at 50 to 70 operating hours to flush any initial wear particles or machining residues. After that, changes are required every 500 to 700 operating hours or at least once per year. For most UK livestock operations, an annual oil change aligned with the pre-winter wagon service fits neatly into existing maintenance routines and provides adequate protection through the heavy feeding season that follows.
Can I order a custom-designed feed mixer gearbox if the standard C3A specification does not match the shaft dimensions or mounting configuration of my mixing wagon?
Yes. Our engineering team designs and manufactures bespoke gearboxes for applications where the standard C3A unit does not provide an exact match. Options include alternative gear ratios, different shaft diameters, non-standard spline counts, custom mounting flanges, and modified housing configurations. UK agricultural machinery manufacturers and wagon builders developing new or adapted platforms are particularly welcome to discuss custom supply. Email your technical specification to [email protected] and we will arrange a consultation with our engineering team.
Other Agricultural Gearboxes We Supply to UK Customers
Alongside the C3A feed mixer gearbox, agriculturalgearboxes.top supplies the full breadth of agricultural power transmission components to UK buyers: rotary cutter gearboxes, fertiliser spreader gearboxes, lawn mower gearboxes, post hole digger gearboxes, rotary tiller gearboxes, corn header gearboxes, flail mower gearboxes, square and round baler gearboxes, manure spreader gearboxes, rotary rake gearboxes, hay tedder gearboxes, irrigation reel gearboxes, and universal gearbox configurations. Our technical team can reconfigure an existing design or develop a fully custom solution where no standard catalogue product meets your application. Contact us to discuss your requirements.
Ready to order, or need a technical recommendation on the right C3A gearbox for your wagon?
UK enquiries responded to within one working day · Standard and custom supply available
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