SMI has been manufacturing agricultural gearboxes since 1996 — covering rotary mower series, rotary tiller series, rice harvester series and grain transportation and storage series across a power range from 30HP to 300HP. Finished gearboxes and OEM components are supplied to agricultural equipment manufacturers and distributors in North America, Australia, Europe and Asia-Pacific.
All gearbox configurations are produced to customer drawing or specification. Standard series configurations are available, and custom ratios, shaft dimensions, mounting geometry and power ratings are offered to meet the specific requirements of each customer’s equipment design.
SMI’s rotary mower gearbox series covers the full power range from 30HP to 300HP in multiple shaft configurations — horizontal dual shaft, right-angle drive, vertical output shaft and splitter configurations. Standard input shaft is 1¾” — 20 spline (ISO 500 1000 RPM PTO) with alternative input configurations available to customer specification. Gear ratios are customisable across the series. Applications include rotary cutters, rotary slashers, rotary mowers and power dividers for tractor-mounted and self-propelled equipment.
Standard agricultural splitter gearbox series with power capacity up to 120HP. Input shaft: 1¾” — 20 spline. Gear ratio customisable to customer requirement. Used in multi-blade rotary mower configurations where a single PTO input drives multiple output shafts to separate cutting deck sections.
Gearboxes for rotary tiller and cultivator applications — designed for the high-torque, high-shock-load conditions of soil engagement. Configurations include right-angle and inline drive layouts to suit different tiller designs and tractor PTO connection geometries.
Specialised gearbox configurations for rice harvester and combine harvester applications — covering threshing drum drives, cutter bar drives and grain handling transmission components. Produced to customer drawing for integration into harvester assembly lines.
Gearbox and drive components for grain augers, conveyors and handling equipment — covering the drive system requirements of grain storage and transportation machinery in both on-farm and commercial grain handling applications.
The gallery above shows SMI’s agricultural gearbox production process — from individual components through batch machining, shaft manufacture and assembly to finished gearbox units ready for despatch. Key manufacturing stages include:
Finished agricultural gearboxes are inspected, labelled and packed for export in wooden cases or cartons to ocean freight standard. SMI’s export packaging has supported deliveries to agricultural equipment manufacturers and distributors in Canada, Australia, India, Poland and other markets across North America, Asia-Pacific and Europe.
The images above show SMI’s manufacturing facilities — machining workshop, assembly area and heat treatment furnace. The heat treatment capability shown is directly relevant to the gear and shaft components that determine the service life and load capacity of the finished gearbox.
| Parameter | Standard Range | Custom |
|---|---|---|
| Power range | 30HP — 300HP | Available on request |
| Splitter series max power | Up to 120HP | Higher ratings on request |
| Standard input shaft | 1¾” — 20 spline (ISO 500) | Alternative profiles available |
| Gear ratio | Customisable across all series | To customer specification |
| Output shaft configuration | Horizontal, vertical, right-angle, splitter | Custom geometry available |
| Housing material | Grey iron, ductile iron | Alternative materials on request |
| OEM branding | Available | Packaging and labelling to customer spec |
SMI fabrica cajas de engranajes agrícolas desde 1996 — cubriendo series de cortadoras rotativas, series de fresadoras rotativas, series de cosechadoras de arroz y series de transporte y almacenamiento de granos, en un rango de potencia de 30HP a 300HP. Suministro OEM según planos y especificaciones del cliente. Exportado a América del Norte, Australia, Europa y Asia-Pacífico. Para consultas, contacte al equipo de SMI →
SMI fabrique des boîtes de vitesses agricoles depuis 1996 — couvrant les séries de faucheuses rotatives, les séries de motoculteurs rotatifs, les séries de moissonneuses de riz et les séries de transport et de stockage de céréales, dans une plage de puissance de 30CV à 300CV. Fourniture OEM selon les plans et spécifications du client. Exporté vers l’Amérique du Nord, l’Australie, l’Europe et l’Asie-Pacifique. Pour toute demande, contactez l’équipe SMI →
SMI produkuje przekładnie rolnicze od 1996 roku — obejmujące serie kosiarek rotacyjnych, serie glebogryzarek, serie kombajnów do ryżu oraz serie transportu i magazynowania zboża, w zakresie mocy od 30KM do 300KM. Dostawa OEM według rysunków i specyfikacji klienta. Eksportowane do Ameryki Północnej, Australii, Europy i Azji i Pacyfiku. W sprawie zapytań, skontaktuj się z zespołem SMI →
SMI, 1996’dan bu yana tarım dişli kutuları üretmektedir — döner biçerdöver serileri, döner çapa makinesi serileri, pirinç hasat makinesi serileri ve tahıl taşıma ve depolama serilerini 30HP ile 300HP güç aralığında kapsamaktadır. Müşteri çizim ve teknik özelliklerine göre OEM tedarik mevcuttur. Kuzey Amerika, Avustralya, Avrupa ve Asya-Pasifik’e ihraç edilmektedir. Sorularınız için SMI ekibiyle iletişime geçin →
To discuss agricultural gearbox supply for your equipment, please provide the following at enquiry stage:
SMI will respond with a written technical assessment and commercial proposal. Contact SMI — Agricultural Gearbox Enquiry →
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