Description
EP-PTO Series | Agricultural Stone Crusher | agricultural stone crusher South Korea
EP-PTO Stone Crusher THOR 2.4 + KIT DRAWBAR — Heavy-Duty Tractor PTO Stone Crusher
The EP-PTO Stone Crusher THOR 2.4 + KIT DRAWBAR is a purpose-built, tractor-mounted rock crushing machine designed for agricultural land clearance, field reclamation, road-base preparation, and terrain management on demanding ground conditions. Powered entirely through the tractor’s Power Take-Off (PTO) shaft, this pto stone crusher eliminates the need for a separate hydraulic power unit or additional prime mover, allowing a single operator to mobilise a full-scale stone crushing operation using nothing more than a suitably powered agricultural tractor. With a working width of 2.4 metres and a minimum tractor engine requirement of 180 cv, the THOR 2.4 is positioned squarely in the heavy-duty tier of agricultural stone crusher equipment — a category that is growing rapidly in South Korea’s intensive farming and rural infrastructure development programmes, where field stones, hardpan, and subsurface rock are persistent obstacles to mechanised cultivation and land improvement.
1. Technical Specifications — PTO Stone Crusher THOR 2.4 + KIT DRAWBAR
The following table sets out the complete technical data for the EP-PTO Stone Crusher THOR 2.4 + KIT DRAWBAR. All dimensional values are in millimetres unless otherwise stated. The minimum tractor engine power requirement of 180 cv ensures sufficient PTO torque is available to drive the high-mass rotor through the full range of ground conditions this machine is designed to handle. Two hydraulic control valves must be available on the host tractor for depth adjustment and auxiliary function control.
| Technical Data | THOR 2.4 |
|---|---|
| Dimensions | |
| Length (mm) | 1546 |
| Width (mm) | 2481 |
| Height (mm) | 1212 |
| Weight | 2300 kg |
| Bottom Linkage Category | Category 2 |
| Working Width | 2.4 m |
| Tractor Requirements | |
| Engine Power (min.) | 180 cv |
| Working Speed | 3 km/h |
| Required Control Valves | 2 |
2. What Is the THOR 2.4 + KIT DRAWBAR PTO Stone Crusher?
The THOR 2.4 + KIT DRAWBAR is a self-contained pto driven stone crusher that attaches to the three-point bottom linkage (Category 2) of a tractor and draws its operating power from the tractor’s PTO output shaft. The KIT DRAWBAR designation indicates that this configuration includes a dedicated drawbar and running gear — a pair of transport wheels that support the rear of the machine when travelling between work sites and allow depth control during crushing passes. This makes it more versatile than a static three-point hitch-only model, as the transport wheels allow the machine to be towed at road speeds without needing to lift the full 2,300 kg implement weight on the tractor’s three-point linkage at all times.
The THOR 2.4’s crushing rotor spans 2.4 metres across its full working width, processing a swath of stone-laden ground in each pass. The rotor carries hardened crushing tools — fixed hammers and counter-cutters — that impact, fracture, and reduce surface and near-surface rocks to fragments small enough to be absorbed into the soil profile or collected for use as road base or drainage aggregate. Unlike conventional stone burying machines or stone rakes, which merely displace stones laterally or push them deeper, a tractor pto stone crusher like the THOR 2.4 reduces rock volume so thoroughly that treated ground can be directly re-cultivated or seeded without further preparation. This complete destruction of field stones is what differentiates professional pto stone crusher equipment from simpler land-clearance tools, and it is the primary reason Korean agricultural landowners and rural road-maintenance contractors are increasing adoption of this equipment category.
3. Five key advantages of the pto stone crusher
The 2.4-metre rotor width allows the THOR 2.4 to clear and crush a significantly wider swath per pass than smaller pto stone crusher models, reducing the number of passes required per hectare. On large-area land reclamation projects — typical of South Korean rural infrastructure and reservoir-perimeter development programmes — this productivity advantage directly reduces the tractor-hours and fuel required to bring stony ground into production or road-ready condition.
The integrated drawbar and transport wheel assembly allows the machine to be towed between job sites without the need to fully lift and carry the 2,300 kg unit on the tractor’s three-point hitch — a practical consideration when moving between fields on rural Korean roads. The wheels also provide consistent ground-following depth control during crushing passes, maintaining uniform rotor penetration depth across undulating terrain without continuous operator correction.
Where conventional agricultural stone crusher equipment merely displaces or buries stones, the THOR 2.4’s high-speed rotor reduces rock to fine aggregate in a single pass. The treated ground is immediately ready for cultivation, seeding, or road-base compaction without secondary preparation — a fundamental time and cost advantage for Korean contractors working under tight seasonal windows in rice paddy conversion, orchard establishment, or rural road maintenance projects.
As a pto driven stone crusher, the THOR 2.4 takes all its operating power directly from the host tractor’s PTO output shaft, requiring no separate engine, hydraulic power unit, or electrical supply. This simplifies the machine’s drive train, reduces maintenance points, and ensures that the total system is as fuel-efficient as the tractor’s power delivery system allows. For Korean agricultural contractors who already operate tractors with 180+ cv ratings, the THOR 2.4 adds stone crushing capability without adding another engine to their fleet.
The bottom linkage Category 2 specification is the standard three-point hitch category for tractors in the 80–180+ cv power range — the most widely distributed tractor class in Korean agricultural use. This compatibility means the THOR 2.4 can be paired with a broad range of suitable host tractors without bespoke adapter hardware, making it a practical purchase for both dedicated stone crushing contractors and mixed-use farm operations looking to expand their tractor’s productive capability.
4. How the PTO Stone Crusher Works
The THOR 2.4 operates on the principle of high-velocity impact crushing. When the tractor’s PTO shaft engages, rotational power is transferred through the machine’s driveline to a high-mass rotor that spans the full 2.4-metre working width. Hardened hammers and counter-cutters are mounted on the rotor at precisely calculated intervals; as the rotor accelerates to working speed, these tools strike surface and sub-surface rocks with sufficient kinetic energy to fracture, shatter, and reduce them to manageable fragment sizes. The crushed material passes through a sizing grate or rear deflector system that controls the maximum output fragment size, ensuring the finished surface meets the specification required — whether for immediate re-seeding, road base compaction, or aggregate recovery.
The working depth is controlled by the transport and depth-control wheels included in the KIT DRAWBAR configuration, which sets the rotor’s vertical position relative to the ground surface. As the tractor advances at the specified working speed of 3 km/h, the machine continuously processes a fresh strip of ground. The hydraulic system — requiring 2 control valves from the tractor’s remote hydraulic outlets — manages the depth-adjustment and any folding or transport functions, giving the operator active control from the cab without needing to dismount. The combination of precisely managed rotor speed, controlled ground speed, and adjustable working depth is what allows the pto stone crusher to deliver consistent output across variable ground conditions, from surface scatter of small field stones through to embedded boulders and rocky outcrops of the type encountered on South Korean hillside farmland conversion projects.
5. Materials & Construction of PTO Stone Crusher
The THOR 2.4’s structural integrity under sustained high-impact loading demands that every primary component be manufactured from materials capable of absorbing significant shock and abrasion without fatigue cracking or deformation. The main rotor shaft and bearing housings are manufactured from high-tensile alloy steel, precision-machined and dynamically balanced to minimise vibration at operating speeds. The machine frame, side panels, and rotor housing are fabricated from heavy-gauge structural steel, welded to heavy-section tolerances that maintain geometry even after years of work in rocky and abrasive ground conditions.
The crushing tools — the hammers and counter-cutters that perform the actual rock-breaking work — are made from hardened boron steel or chromium-carbide-overlay hardfacing material, selected for their ability to sustain thousands of high-velocity rock impacts before wearing to a level that requires replacement. The wear parts on agricultural stone crusher equipment are inherently consumable, and the THOR 2.4 is engineered so that hammers and counter-cutters can be replaced in the field with standard tooling without needing specialist workshop facilities — an important consideration for South Korean operators working in remote hillside or island farmland settings far from major service centres. The transport wheels and drawbar components of the KIT DRAWBAR are manufactured from structural steel with sealed bearing hubs designed to tolerate the contamination and loading of agricultural use without requiring frequent servicing.
All external steel surfaces receive a durable industrial paint system — typically epoxy primer plus polyurethane topcoat in a high-visibility colour — providing corrosion resistance in the wet and humid conditions encountered during the Korean rainy season and winter thaw periods. The overall construction philosophy prioritises field repairability and long structural service life over lightweight design, reflecting the working reality that heavy-duty tractor stone crusher equipment operates in environments where equipment downtime is immediately costly and access to specialist repairs may be limited.
6. Application Scenarios of PTO Stone Crusher
The THOR 2.4 + KIT DRAWBAR covers the full range of applications where surface and near-surface rock must be reduced, cleared, or processed to allow subsequent land use. The following scenarios represent the principal use cases encountered by operators of this agricultural stone crusher in South Korean and global agricultural and infrastructure markets.
Converting stony hillside or riverine terraced land into productive cultivation is one of the primary drivers of pto stone crusher adoption in South Korea. The THOR 2.4 processes field stones, sub-surface boulders, and rocky outcrops in a single pass, leaving soil immediately ready for tillage, planting, or mulching without the multiple-pass secondary preparation required by stone rakes or stone buriers. This is particularly relevant in Korea’s mountainous inland farming regions where arable land is scarce and land productivity per hectare is critical to farm economics.
Rural access roads in South Korea’s agricultural interior frequently traverse ground with surface or sub-surface rock that would damage vehicle tyres and road-maintenance equipment if left untreated. The tractor pto stone crusher processes the road corridor’s rock content into a compactable aggregate base layer, eliminating the need to import crushed stone for road-base construction and reducing rural road construction costs substantially. The stone crushing equipment’s 2.4 m working width allows it to process a full one-lane road width in a single pass.
New orchard and vineyard developments on stony South Korean hillside land require thorough stone clearance before permanent planting, since stones interfere with root development and mechanised under-tree cultivation. The pto stone crusher removes stones completely rather than relocating them, allowing orchard row spacing and irrigation trenching to proceed without encountering relocated stone deposits — a common problem when stone rakes or windrowers are used for site preparation.
South Korea’s extensive network of agricultural reservoirs and irrigation canals requires periodic maintenance of perimeter access tracks and embankment slopes, where frost heave and erosion continuously expose sub-surface rocks. The THOR 2.4 + KIT DRAWBAR’s transport wheels allow it to work on sloped embankment surfaces with better stability than linkage-only machines, and the drawbar configuration allows it to be repositioned quickly between reservoir sections using the host tractor alone.
Before hydroseeding or erosion-control blanket installation on rocky slopes, the stone surface must be crushed and broken up to provide a viable soil-seed contact zone. The portable stone crusher machine capability of the THOR 2.4 — combined with its KIT DRAWBAR mobility — allows it to be moved efficiently between slope sections during erosion control and land rehabilitation projects, common in South Korea’s post-landslide recovery and afforestation programmes.
On rural Korean construction sites where surface rock prevents excavator bucket penetration or conflicts with foundation depth requirements, the pto driven stone crusher can pre-process the site surface before excavation begins, reducing the rock to fragment sizes that conventional excavators and graders can handle. This pre-crushing approach avoids the costly use of rock-breaker hydraulic hammers for large shallow-rock sites where the THOR 2.4’s throughput rate is more cost-effective per square metre treated.
7. Applicable Regulations & Standards
Agricultural stone crushing equipment used with tractors is subject to machinery safety and agricultural equipment regulations in most markets. The following frameworks are relevant to the procurement and operation of the THOR 2.4 + KIT DRAWBAR across South Korea and other key global markets.
Agricultural machinery in South Korea is regulated under the Agricultural Mechanization Promotion Act (농업기계화 촉진법) and its implementing regulations, administered by the Rural Development Administration (RDA). PTO-driven implements must comply with safety standards for tractor-attached equipment, including PTO shaft guarding requirements under KCS (Korea Construction Standards) and MAFRA (Ministry of Agriculture, Food and Rural Affairs) safety guidelines. The Occupational Safety and Health Act (산업안전보건법) applies to operators of agricultural stone crushing equipment in commercial settings. Import of agricultural machinery may require KC (Korea Certification) mark assessment depending on equipment category.
PTO-driven agricultural machinery sold in the EU must comply with the Machinery Directive 2006/42/EC (transitioning to Machinery Regulation EU 2023/1230). CE marking is required. EN ISO 4254-1 (agricultural machinery — safety — general requirements) and EN 1152 (speeds, speeds and guards for PTO drives) establish the PTO driveshaft guarding and safety requirements. The PTO driveshaft guard must prevent operator contact with rotating components in accordance with EN ISO 11684 safety sign requirements.
OSHA 29 CFR 1928 governs agricultural operations safety, including PTO implement guarding. ASABE (American Society of Agricultural and Biological Engineers) standards ASABE S207 and ASABE EP455 address PTO shaft and implement safety. State-level agricultural equipment regulations may also apply depending on the state of operation. For road transport of the THOR 2.4 between job sites, state highway department oversize/overweight permit requirements apply if the 2,481 mm width exceeds the state’s standard vehicle width limit.
Safe Work Australia’s Model Code of Practice for Preventing and Responding to Workplace Bullying — and specifically Safe Work Australia’s guidance on agricultural machinery — requires PTO implement guarding, operator ROPS (roll-over protection structure) on the host tractor, and risk assessment for crushing and entanglement hazards. State-level Work Health and Safety Acts (WHS Acts) apply in each jurisdiction. Road transport of the machine requires compliance with the NHVR (National Heavy Vehicle Regulator) mass and dimension standards.
ISO 11684 series governs safety signs and hazard marking on agricultural machinery, including pto stone crusher equipment. ISO 4254-1 sets general safety requirements for agricultural machinery. ISO 500-1 through ISO 500-3 define PTO shaft dimensions and rotational speed standards (540 rpm and 1000 rpm categories) that must be matched between the host tractor and the crusher’s input driveline. Correct PTO speed category matching is essential for safe and efficient operation of the THOR 2.4.
ASEAN member states including Thailand, Vietnam, and Indonesia are developing agricultural mechanisation standards aligned with ISO and FAO (Food and Agriculture Organization) frameworks. Japan’s agricultural safety standard JIS B 9700 (equivalent to ISO 12100) applies to machinery safety design in the region. Taiwan’s Agricultural Machinery Safety Management Act and related regulations impose type-approval requirements for imported agricultural stone crushing equipment over defined power thresholds.
8. Complete Your Drive System — Compatible Accessories
The THOR 2.4 + KIT DRAWBAR is a complete system, but the surrounding drive train — from the tractor PTO to the machine input shaft, and from the machine output to downstream aggregate handling — benefits from correctly specified complementary components. We supply matching PTO shafts, gearboxes, and related power transmission parts that integrate directly with the THOR 2.4’s driveline, giving B2B buyers in South Korea and globally a one-stop procurement option for the complete stone crushing system.
Sprocket drives form part of the internal power transmission within the THOR 2.4’s rotor driveline, and matching sprocket specifications are required when servicing or rebuilding the machine’s drive chain assemblies. We supply a full range of agricultural sprockets in carbon steel and alloy steel, covering the pitch sizes and bore dimensions used in heavy-duty tractor-mounted stone crushing equipment. Sourcing sprockets from the same supplier as your stone crusher simplifies parts identification and ensures dimensional compatibility without trial-and-error substitution.
The input gearbox on a tractor pto stone crusher is one of the highest-stress components in the entire machine, absorbing the full impact reaction force every time the rotor strikes a large rock. Replacement or upgrade gearboxes for agricultural stone crushing equipment must be rated for the shock-load cycles characteristic of this application — continuous peak-torque events rather than the steady-state loading assumed in standard industrial gearbox ratings. Our agricultural gearbox range covers the input torque capacities and PTO speed configurations appropriate for the THOR 2.4 class of machine.
9. About Our Manufacturing & Supply Capability
We are an established manufacturer and global B2B supplier of heavy-duty agricultural stone crushing equipment and associated power transmission components, operating under quality management standards that ensure dimensional consistency, material traceability, and documentation readiness for regulatory compliance across multiple markets. Our THOR series pto stone crusher product range has been developed based on field feedback from operators in diverse terrain conditions — from the rocky hillside farmlands of East Asia to the stony riverine alluvium of South American agricultural regions — giving the design a robustness that purely laboratory-developed specifications cannot replicate.
For B2B customers in South Korea — including agricultural machinery importers, rural development contractors, land-clearance service providers, and government rural infrastructure procurement agencies — we provide full technical specification packages, including dimensional drawings, weight distribution data, PTO power and speed requirements, and where applicable, safety documentation referencing relevant Korean and international standards.
Frequently Asked Questions
Q1. What tractor power is required to run the THOR 2.4 pto stone crusher effectively on rocky hillside farmland in South Korea?
The THOR 2.4 + KIT DRAWBAR requires a minimum tractor engine power of 180 cv (approximately 177 hp). This minimum rating ensures sufficient PTO torque is available to drive the high-mass rotor through the range of rock sizes and ground conditions the machine is designed to handle, including embedded boulders and dense rocky outcrops. For particularly demanding Korean hillside conditions with high boulder density, a tractor in the 200–220 cv range provides an additional safety margin and allows the machine to maintain its 3 km/h working speed without PTO overloading on difficult ground sections.
Q2. How does the KIT DRAWBAR configuration differ from a standard three-point hitch pto stone crusher, and which is better for Korean road maintenance work?
A standard three-point hitch pto stone crusher is supported entirely by the tractor’s rear linkage and must be raised to transport position between passes. The KIT DRAWBAR configuration adds a pair of transport wheels and a drawbar that allows the machine to support its own weight during road transport and maintain a set working depth during passes without relying on linkage position control. For Korean rural road maintenance work — which often requires moving between road sections several kilometres apart — the KIT DRAWBAR’s ability to be towed at road speeds without full linkage lift is a practical advantage that reduces operator fatigue and tractor hydraulic wear on long repositioning runs.
Q3. What is the working speed of the THOR 2.4 pto stone crusher, and how many hectares per day can it process on typical Korean farmland?
The specified working speed is 3 km/h. At this speed across the 2.4 m working width, the theoretical area coverage is approximately 2.4 m × 3,000 m/h = 0.72 ha/hour or roughly 4–5 hectares per 6–7 working-hour day under continuous operation. Actual throughput will vary depending on stone density, embedded boulder frequency, soil conditions, and terrain slope — in very dense, rocky conditions, working speed may need to be reduced below 3 km/h to prevent PTO overloading, reducing daily area coverage proportionally.
Q4. Which type of pto stone crusher is best suited for preparing stony terraced rice paddy conversions in the Korean countryside?
For terraced rice paddy conversions in Korea’s highland agricultural zones, a tractor pto stone crusher in the 2.0–2.4 m working width range is typically most practical, as terrace widths rarely exceed 3 metres and the machine must operate within the terrace width without overhanging onto adjacent terraces or embankment edges. The THOR 2.4 at exactly 2.4 m working width is at the upper end of practical width for many Korean terraced field sites; the KIT DRAWBAR configuration’s depth-control wheels are particularly useful for maintaining consistent crushing depth on the uneven pad surfaces of older terraced paddy land.
Q5. How often do the crushing hammers and wear parts on an agricultural stone crusher need to be replaced during a typical Korean land reclamation project?
Wear part life depends heavily on the hardness and abrasiveness of the rock being processed. For typical Korean granite and metamorphic rock — harder than sedimentary limestone — hammer life is shorter than in softer-rock regions. As a general guide, crushing hammers on heavy-duty tractor stone crusher machines may require inspection after 50–100 operating hours and replacement after 150–300 hours under continuous hard-rock crushing conditions. We recommend carrying a set of replacement hammers on-site during major land reclamation projects to avoid delays when a hammer change is needed during a project phase.
Q6. Can the THOR 2.4 pto stone crusher be used on slopes and hillside terrain common in Korea’s mountainous agricultural regions?
The THOR 2.4 + KIT DRAWBAR is designed for use on typical agricultural terrain gradients, but slope operation requires careful assessment. The transport and depth-control wheels provide lateral stability benefit on moderate side-slopes, and the machine’s low centre of gravity (relative to its 2,300 kg weight and 2.4 m width) gives it reasonable slope stability. As a general guideline, tractor stone crusher for sale specifications typically quote maximum operating slopes of 15–20° depending on terrain surface and tractor stability limits. On steeper Korean hillside terrain, the host tractor’s stability characteristics — particularly its ROPS and ballasting — become the primary limiting factor for safe operation, and tractor rollover risk assessment should be conducted before working on steep slopes.
Q7. What maintenance is required on a pto driven stone crusher between seasons, and how can Korean operators prepare the THOR 2.4 for winter storage?
Between-season maintenance for the THOR 2.4 should include: inspection and replacement of worn crushing hammers and counter-cutters; greasing of all rotor bearing housing grease points; inspection of the PTO driveshaft universal joints and replacement of worn crosses; checking gearbox oil level and changing if contaminated; inspection of transport wheel bearing condition; and touch-up painting of any areas where stone impact has removed paint to prevent winter corrosion. For Korean winter storage — particularly in regions with severe freeze-thaw cycles — drain any accumulated water from the machine cavity, clean stone debris from the rotor housing, and store indoors or under cover to protect bearing seals from frost damage.
