Power take-off (PTO) Shaft

A power take-off (PTO) shaft transmits engine power from a tractor or vehicle to an attached implement or driven machine. It is one of the most fundamental mechanical interfaces in agricultural equipment — standardised in dimensions and operating speed to allow interchangeability across tractor and implement brands worldwide.

SMI manufactures PTO shafts, yokes, safety shields and associated driveline components to customer drawing and specification. Production covers casting, machining, surface treatment and export packaging — with finished assemblies supplied to agricultural equipment manufacturers and distributors in Europe and other global markets, including supply to customers in Germany.

Technical Background — PTO Standards and Configurations

Agricultural PTO shafts are standardised under ISO 500, which defines shaft dimensions, spline profiles, operating speeds and safety requirements. Three principal configurations are in common use:

SMI can manufacture to any of these standard configurations or to customer-specified non-standard profiles. Spline dimensions, shaft length, yoke type and safety shield configuration are all customisable to the specific implement or equipment requirement.

Components Supplied

PTO Shafts — Complete Assemblies

Complete PTO shaft assemblies comprising inner and outer telescoping tubes, universal joints, yokes and safety shields. Shaft length, tube diameter, joint angle capacity and safety shield type are specified to the customer’s implement design. Standard yellow finish or alternative surface treatments available.

Yokes and Quick-Release Connectors

Cast and forged yoke components in standard and custom configurations — including push-pin, bolt-on and quick-release locking types. Spline bore dimensions manufactured to ISO 500 or customer specification. Available in standard silver/natural finish or painted to customer colour requirement.

Safety Shields

Plastic safety shields for PTO shaft assemblies — manufactured to ISO 500 safety requirements. Standard black configuration or custom colour. Shield geometry designed to the specific shaft assembly dimensions.

Spare Parts and Sub-Components

Individual universal joints, cross kits, bearing cups and yoke components available as spare parts supply alongside complete shaft assemblies. All parts manufactured to the same drawing and specification as the original assembly.

Manufacturing and Export Capability

The gallery images above show SMI’s PTO shaft production and export preparation process — from painted shaft assemblies on the production line through to completed export packaging. Key manufacturing stages include:

• Casting and forging — yoke and component manufacture to dimensional drawing
• Machining — spline cutting, bore machining and surface finishing to specified tolerances
• Surface treatment — powder coating and paint finishing, standard yellow or customer-specified colour
• Assembly — complete shaft assembly with universal joints, safety shields and end fittings
• Export packaging — wooden frame pallet with plastic wrapping, labelled for export, ocean freight ready

Finished assemblies are manufactured in China and exported globally. SMI’s production capability supports both small development orders and large-volume OEM supply programmes.

OEM and Custom Supply

SMI’s PTO shaft manufacturing capability is available to agricultural equipment manufacturers and distributors requiring:

• OEM supply to drawing — shaft assemblies manufactured to the customer’s engineering drawing or CAD model
• Custom configuration — shaft length, spline profile, yoke type, joint angle, surface finish and shield colour to specification
• Branded packaging — customer branding on shaft assemblies and packaging
• Spare parts programmes — ongoing supply of replacement components alongside new shaft assemblies
• Development support — SMI can assist customers in specifying the correct shaft configuration for new implement designs

Typical Applications

• Rotary mowers and flail mowers
• Balers and forage harvesters
• Spreaders and sprayers
• Tillers and cultivators
• Pumps and generators driven from tractor PTO
• Industrial and truck-mounted applications — water pumps, blowers, winches, compactors

En Español — Ejes de Toma de Fuerza (PTO) para Maquinaria Agrícola

SMI fabrica ejes de toma de fuerza (PTO), yugos y componentes de transmisión según los planos y especificaciones del cliente. La producción cubre fundición, mecanizado, tratamiento de superficie y embalaje de exportación. Configuraciones compatibles con ISO 500 en los tres tipos estándar (540 RPM y 1000 RPM), así como perfiles de estrías personalizados. Suministro OEM disponible para fabricantes de equipos agrícolas. Para consultas, contacte al equipo de SMI →AMP

En Français — Arbres de Prise de Force (PTO) pour Matériel Agricole

SMI fabrique des arbres de prise de force (PTO), des fourches et des composants de transmission selon les plans et spécifications du client. La production comprend la fonderie, l’usinage, le traitement de surface et l’emballage pour l’exportation. Configurations compatibles ISO 500 dans les trois types standard (540 tr/min et 1000 tr/min), ainsi que des profils de cannelures personnalisés. Fourniture OEM disponible pour les fabricants de matériel agricole. Pour toute demande, contactez l’équipe SMI →AMP

Po Polsku — Wały Odbioru Mocy (WOM) do Maszyn Rolniczych

SMI produkuje wały odbioru mocy (WOM/PTO), widełki i komponenty napędowe według rysunków i specyfikacji klienta. Produkcja obejmuje odlewanie, obróbkę mechaniczną, obróbkę powierzchniową i pakowanie eksportowe. Konfiguracje zgodne z normą ISO 500 we wszystkich trzech typach standardowych (540 obr/min i 1000 obr/min), a także niestandardowe profile wielowypustów. Dostawa OEM dostępna dla producentów sprzętu rolniczego. W sprawie zapytań prosimy o kontakt z zespołem SMI →AMP

Türkçe — Tarım Makineleri için PTO Şaftları ve Güç Aktarma Bileşenleri

SMI, müşteri çizim ve teknik özelliklerine göre PTO şaftları, yoke bileşenleri ve tahrik milleri üretmektedir. Üretim; döküm, işleme, yüzey işlemi ve ihracat ambalajını kapsamaktadır. ISO 500 uyumlu üç standart konfigürasyon (540 devir/dak ve 1000 devir/dak) ile özel kanal profillerinde üretim yapılmaktadır. Tarım ekipmanı üreticileri için OEM tedarik mevcuttur. Sorularınız için SMI ekibiyle iletişime geçin →AMP

Related Products — SMI Agricultural Mechanical Components

• Agriculture Gearbox Design and ManufacturingAMP — rotary lawn mower gearbox series, custom configurations
• Contact SMI — PTO Shaft and Driveline EnquiryAMP

Request a Quotation

To enquire about PTO shaft or driveline component supply, please provide the following:

• Component type — complete shaft assembly, yoke, shield or spare parts
• PTO standard — ISO 500 type (540 RPM / 1000 RPM) or customer-specified
• Shaft length and tube diameter
• Spline profile and yoke type
• Surface finish and colour requirement
• Annual volume — units per year
• Drawing or specification if available

SMI will respond with a written technical assessment and commercial proposal. Contact SMI — PTO Shaft Enquiry →AMP