EP-1.46:1 Ratio 23HP 540 RPM Aluminum Gearbox

① Lightweight Aluminum Housing

The die-cast aluminum gearbox housing reduces overall unit weight by up to 40% compared to conventional cast iron housings, simplifying installation on tractors and implements and reducing structural fatigue on mounted brackets over long operating seasons.

② Precise 1.46:1 Gear Ratio

With 19/13 tooth geometry and a Module 5 specification, this aluminum right angle gearbox achieves accurate torque multiplication at 1.46:1, making it an ideal match for standard 540 RPM PTO output from tractors ranging from 18 HP to 30 HP. Speed consistency is maintained even under fluctuating load demands.

③ Corrosion-Resistant Design

The aluminum alloy body offers inherent resistance to rust and oxidation in humid, wet, or chemically exposed field environments. Unlike cast iron equivalents, learning how to clean aluminum gearbox components after a season is straightforward — a simple wipe-down and oil check is usually all that is needed, keeping total ownership cost low.

④ High-Power, Compact Build

Despite delivering a rated 23 HP through a compact envelope (overall dimensions: 219.5 × 149 × 108 mm), this unit provides excellent power density. The 1 3/8" Z6 spline shaft interface is the global standard for agricultural implements, ensuring direct compatibility with most PTO drive shaft configurations across North America, Europe, and Asia-Pacific markets.

⑤ ISO-Compliant & Globally Deployable

Manufactured under ISO 9001:2015 quality management protocols, every unit goes through dimensional inspection and load testing prior to shipment. The design aligns with CE mechanical safety directives applicable in EU member states, ASABE standards used across North American agriculture, and AS/NZS mechanical equipment standards observed in Australia and New Zealand. This makes the gearbox suitable for immediate deployment across regulated international markets without additional modification.

Housing — Cast Aluminum Alloy

The outer shell is precision die-cast from high-strength aluminum alloy, giving the housing a density roughly one-third that of cast iron while retaining adequate stiffness to resist gear-separation forces at maximum rated torque. Surface roughness on mating faces is held within Ra 1.6 µm to ensure a reliable oil-tight seal without gasket compound in most installations.

Gears — Alloy Steel, Induction Hardened

Both the drive and driven bevel gears are hobbed from 20CrMnTi alloy steel, then carburized and induction-hardened to 58–62 HRC on the working flanks. This surface hardness supports full 23 HP loads without pitting, while the tougher core absorbs shock loads from implement engagement without fracture.

Shafts — Carbon Steel, Ground Finish

Input and output shafts are CNC-turned and ground from 45# carbon steel. The 1 3/8" Z6 spline profile is machined to DIN 5480 tolerances, guaranteeing interchangeability with any standard agricultural PTO drive shaft — a key concern for aluminum gearbox replacement scenarios on existing equipment.

Bearings & Seals

Tapered roller bearings from Tier-1 bearing suppliers are used at all shaft positions, pre-adjusted for a defined axial preload to eliminate rattle and extend service intervals. Shaft seals are dual-lip NBR rubber rated to –40°C/+120°C, covering the full operating temperature range encountered across Canadian winters and Australian summer harvests alike.

🌾 Rotary Mowers & Flail Cutters

The most widespread use of this aluminium gearbox format. The 1.46:1 step-up provides rotor blades with the higher tip-speed needed to cut standing grass, roadside brush, and orchard understory without stalling the tractor PTO under intermittent load spikes from dense patches.

💦 Irrigation Pump Drives

Small centrifugal and piston pumps on irrigation rigs in the Netherlands, Australia, and the UK frequently use a compact aluminum right angle gearbox to redirect tractor PTO torque at 90° while stepping up shaft speed to match pump design speed, simplifying pipeline layouts on flat paddock installations.

🌱 Spreader & Seeder Drives

Fertilizer spreaders and grain seeders in Brazil and Colombia use this gearbox to drive distribution discs or augers from the tractor PTO. The lightweight aluminum gearbox housing keeps mounted weight low, which is essential on front-mounted toolbar systems where balance is critical during field operation.

⚙️ Conveyors & Auger Systems

Grain handling conveyors and forage augers in Canadian and US farms benefit from the moderate speed increase this unit provides. The robust bearing arrangement handles the cantilever loading typical of auger-tube installations, and the aluminum body resists the mild alkali environment found inside grain storage facilities.

🔧 Light Industrial Machinery

Beyond pure agriculture, this model is found on small woodchippers, composting turners, and material-handling conveyors in South Korea and the UK where the combination of a compact aluminum body, standardised spline interface, and reliable 23 HP rating meets both weight-sensitive mounting requirements and moderate power demands.

🌿 Orchard & Vineyard Equipment

Narrow-row orchard platforms and vineyard undervine mowers in the Netherlands and Australian wine regions increasingly specify lightweight power transmission components to reduce soil compaction. At 7.2 kg, this aluminum gearbox imposes minimal added mass on compact tractor lift arms and three-point hitches operating in restricted row widths.

European Union (CE / Machinery Directive 2006/42/EC)

Gearbox assemblies sold into EU member states — including the Netherlands, Germany, France, and Spain — must comply with the Machinery Directive, which covers mechanical risk, guarding requirements for rotating shafts, and noise declaration. Our spline shaft design aligns with ISO 500 for PTO coupling zones, a requirement enforced across all EU tractor-implement combinations.

United States & Canada (ASABE / OSHA)

ASABE Standard S203.12 defines PTO shaft and coupling geometry for North American agricultural equipment. The 1 3/8" Z6 spline on this unit conforms to those dimensions. OSHA 1910.217 addresses mechanical power transmission guarding in industrial settings, relevant for conveyor and processing applications in US facilities. Canadian CSA B11 standards for machinery safety apply in industrial installations across provinces.

Australia & New Zealand (AS/NZS)

The AS 4024 series (Safety of Machinery) governs rotating equipment used in Australian and New Zealand workplaces. Specifically, AS 4024.3302 addresses PTO-driven machinery design and guarding. Equipment importing aluminum gearbox replacement units into Australia must also comply with the Agricultural and Veterinary Chemicals Act regarding contamination prevention in crop contact zones.

Brazil & South America (ABNT)

Brazil's ABNT NBR 9690 standard covers agricultural tractor PTO dimensions and is harmonized with ISO 500, meaning the Z6 spline profile used on this unit achieves direct compliance. Colombia's ICONTEC standards for agricultural machinery also reference ISO 500 PTO geometry, supporting straightforward importation into the Andean market for sugarcane and coffee farm equipment applications.

South Korea (KS Standards)

Korean Standard KS B ISO 500 governs PTO shafts and is directly aligned with the international ISO framework. Agricultural machinery imported for use in South Korea's rice, vegetable, and fruit farming sectors must comply with the Agricultural Mechanisation Promotion Act, which requires mechanical safety and reliability certification for commercially operated implements.

United Kingdom (PSSR / PUWER)

Post-Brexit, the UK maintains its own Provision and Use of Work Equipment Regulations (PUWER 1998) and the Supply of Machinery (Safety) Regulations 2008. Both require that agricultural gearboxes sold in the UK market carry a declaration of conformity and meet minimum guarding standards for all rotating parts accessible to operators. Our units include guarding provision mounting points on the housing.

PTO Drive Shaft

A matched PTO Mili completes the driveline between your tractor and this aluminum gearbox. Our shaft range covers both telescoping and fixed-length designs with overrunning clutches and shear bolt torque limiters, all pre-sized to the 1 3/8" Z6 spline standard used on this gearbox input. Matching your PTO shaft from the same supplier eliminates the fitting uncertainty common in multi-brand assemblies and ensures the driveline runs true without excessive vibration across its full operating length.

Full Range Agricultural Gearbox

The EP-1.46:1 is one unit in a comprehensive Tarım Dişli Kutusu series covering ratios from 1:1 to 6:1, power ratings from 10 HP to 150 HP, and housing materials including cast iron, ductile iron, and aluminum. Whether your application requires a higher ratio for low-speed high-torque drives or a larger aluminum gearbox for a commercial-scale implement, the full range provides matching specifications across multiple equipment generations and implement types — all sourced, specified, and supported from a single supply point.