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EP-RockMaster Series — Heavy-Duty Agricultural Stone Crusher Line
EP-RockMaster Agricultural Stone Crusher
PTO-driven tractor stone crusher engineered for high-horsepower operations. Crushes stones up to 500 mm diameter to a working depth of 250 mm — built for the most demanding land-clearing, field reclamation, and road-subbase preparation tasks.
1. Technical Specifications — SC Series Agricultural Stone Crusher
The table below covers the complete dimensional and performance data for all three EP-RockMaster Agricultural Stone Crusher models. All dimensions are in millimeters unless otherwise stated.
| Parameter | SC 200 | SC 225 | SC 250 |
|---|---|---|---|
| Tractor Power (hp) | 280–400 | 280–400 | 280–400 |
| PTO Speed (rpm) | 1000 | 1000 | 1000 |
| Working Width (mm) | 2080 | 2320 | 2560 |
| Total Width (mm) | 2566 | 2806 | 3046 |
| Weight (kg) | 4850 | 5050 | 5250 |
| Rotor Diameter (mm) | 700 | 700 | 700 |
| Max Shredding Diameter (mm) | 500 | 500 | 500 |
| Max Working Depth (mm) | 250 | 250 | 250 |
| No. Teeth — type STC/3 + STC/3/HD + STC/FP | 50+4+4 | 56+4+4 | 62+4+4 |
2. What Is the EP-RockMaster Agricultural Stone Crusher?
The EP-RockMaster is a heavy-duty agricultural stone crusher designed for tractor-mounted, PTO-driven operation across large-scale land preparation and reclamation projects. Belonging to the SC series, this machine operates at the top end of the stone-crushing spectrum — matched to tractors in the 280 to 400 hp range and driven at a PTO speed of 1000 rpm. Whether you are clearing rocky pasture in Korea’s mountainous interior, breaking down limestone outcrops before cultivation, or preparing compacted gravel sub-bases for rural road construction, the EP-RockMaster Agricultural Stone Crusher delivers the consistent throughput and mechanical durability that demanding terrain requires.
Unlike lighter-duty tractor stone crushers designed for occasional surface clearing, the SC series EP-RockMaster Agricultural Stone Crusher is engineered for continuous-duty use across extended working sessions. Its 700 mm rotor diameter, triple-type tooth configuration (STC/3 + STC/3/HD + STC/FP), and maximum shredding diameter of 500 mm place it in a class that handles not just agricultural field stones but also hard-rock quarry material, construction site debris, and forestry clear-cut operations where stumps and subsurface rock coexist. Three working widths — 2080 mm (SC 200), 2320 mm (SC 225), and 2560 mm (SC 250) — allow project managers to select the model that best matches their tractor’s horsepower and the site’s productivity requirements.
2. Five Key Advantages of the EP-RockMaster Agricultural Stone Crusher
Extreme Stone Clearance Capacity
The 700 mm rotor and a maximum shredding diameter of 500 mm allow the EP-RockMaster Agricultural Stone Crusher to process stones that would stall or damage lighter equipment. This capacity makes it the correct tool for rocky hillside reclamation, boulder-strewn pasture recovery, and pre-cultivation clearing on land that has never been farmed — situations common in Korea’s Gyeonggi, Gangwon, and North Chungcheong provinces where volcanic and metamorphic rock outcrops are frequent.
Triple-Type Tooth System
The rotor carries three distinct tooth types simultaneously — STC/3 standard picks for soil penetration and general crushing, STC/3/HD heavy-duty picks for hard rock and sub-surface boulders, and STC/FP flat-profile finishing picks that level the crushed material and prepare a uniform seedbed surface. This combined approach eliminates the need to make multiple passes with different machines, reducing fuel consumption and total operating hours per hectare.
Wide Working Width Selection
With three models covering working widths from 2080 mm to 2560 mm, the EP-RockMaster Agricultural Stone Crusher series scales to the available horsepower and the field dimensions. Larger working widths mean fewer tractor passes per hectare, directly reducing the cost and time per unit area. For large agricultural operations and land developers sourcing a tractor mounted stone crusher for multi-hectare projects, the SC 250 at 2560 mm working width delivers the highest area productivity in the series.
PTO-Driven — No Separate Power Source Required
The EP-RockMaster takes power directly from the tractor’s PTO at 1000 rpm, eliminating the need for a separate engine, fuel system, or hydraulic power unit on the implement. This simplifies field logistics significantly: the operator engages the PTO from the tractor cab, and the machine runs. This is a primary advantage for operators comparing the كسارة الحجارة PTO format against self-propelled alternatives, particularly where transport between fields or loading onto trailers is a regular part of the workflow.
250 mm Maximum Working Depth
A maximum working depth of 250 mm puts the EP-RockMaster Agricultural Stone Crusher well into the sub-topsoil layer, reaching stones that shallower machines miss and leave behind to damage subsequent cultivation equipment. This depth is particularly relevant for land that has been ploughed previously but never properly cleared, where frost heave and seasonal movement continuously push fresh stones to the surface. The ability to work at full depth on a single pass reduces the number of repeat visits a field requires before it is truly cleared.
3. How the EP-RockMaster Stone Crusher Works
The EP-RockMaster Agricultural Stone Crusher operates on a high-speed rotor-and-tooth impact principle. Power from the tractor’s PTO shaft is transmitted through the machine’s gearbox to a horizontal rotor shaft running the full width of the implement. Mounted on this shaft is the rotor drum — 700 mm in diameter — which carries the three interleaved tooth types in a precisely calculated pattern across its circumference and face width.
As the tractor moves forward, the rotor rotates at high speed and the teeth engage the ground. The leading STC/3 picks fracture and lift stones from the soil matrix. The STC/3/HD heavy-duty picks then attack the harder, larger material — boulders up to 500 mm in diameter that the standard picks have loosened from the ground. Impact energy from the rotor drives these picks into the stone surface, creating fracture planes that progressively reduce the rock to gravel-sized fragments. The STC/FP flat-profile picks work behind the primary picks, breaking the crushed fragments further and redistributing the material evenly across the worked surface.
A robust rear deflector plate controls the trajectory of crushed material, preventing stones from being thrown beyond the machine’s footprint and ensuring the processed material stays within the worked zone. The result is a uniform layer of crushed gravel mixed into the upper 250 mm of soil — ready for further cultivation, seeding, or compaction depending on the application. This is precisely what agricultural land developers mean when they ask what is a rock crusher in the context of field preparation — not merely breaking stone, but integrating the crushed material into the soil profile in a single, controlled operation.
4. Materials & Construction of Agricultural Stone Crusher
The EP-RockMaster Agricultural Stone Crusher is built to survive the harshest conditions that a stone crusher machine will ever encounter. The structural frame is fabricated from high-tensile structural steel, welded and stress-relieved to resist the high cyclic loading inherent in rock-impact applications. Frame sections and side panels are dimensioned to distribute the reaction forces from rotor impacts without fatigue cracking — a common failure mode in lesser-built implements that have insufficient plate thickness or inadequate weld preparation.
The rotor drum itself is constructed from a large-diameter steel tube with machined surfaces for accurate tooth holder placement. Tooth holders are manufactured from cast-alloy steel, heat-treated to achieve the hardness needed to retain the picks under repeated impact loading. The picks — STC/3, STC/3/HD, and STC/FP — are carbide-tipped, meaning the cutting surface that contacts stone is tungsten carbide rather than steel. Tungsten carbide has approximately three times the hardness of hardened steel and more than ten times the wear resistance in abrasive rock contact, which directly translates into extended pick life and fewer replacement cycles per season.
The gearbox housing is cast iron for rigidity and vibration damping. Internal gears are case-hardened alloy steel, lubricated by a splash-oiling system with an integrated oil-level sight glass accessible for routine inspection without tools. All external steel surfaces receive a multi-layer coating system: phosphate conversion treatment for base adhesion, a zinc-rich primer layer for galvanic corrosion protection, and a polyurethane topcoat in agricultural green — durable under UV exposure and chemical fertilizer contact. Fasteners throughout are grade 10.9 or higher, with locking features on critical joints subject to vibration loosening during operation.
5. Application Scenarios of Agricultural Stone Crusher
The EP-RockMaster agricultural stone crusher serves a wide range of industries and site conditions. Below are the primary deployment contexts where operators and land developers find the most value from the SC series.
Agricultural Field Reclamation
Rocky hillside and terraced farmland in Korea’s mountain provinces — particularly in Gangwon-do and Gyeongbuk — frequently carries dense subsurface rock that prevents normal cultivation depth. The EP-RockMaster crushes in-situ boulders at working depths up to 250 mm, effectively converting unworkable rocky ground into cultivable soil in a single pass. This makes it the preferred tractor pto stone crusher choice for cooperatives expanding their arable area without resorting to blasting or manual rock removal.
Orchard & Vineyard Land Preparation
Before planting permanent crops such as fruit trees, grape vines, or persimmons — all economically important in Korea’s Chungcheongnam-do and Jeollanam-do provinces — the planting zone must be cleared of surface and sub-surface stones to prevent root deflection and implement damage during future cultivation operations. A single EP-RockMaster pass creates a stone-free planting bed that allows mechanical trenching and transplanting machinery to operate without obstruction through the orchard’s productive life.
Rural Road & Track Sub-Base Preparation
Agricultural road construction and farm track rehabilitation require a stable, compacted sub-base. The EP-RockMaster’s ability to crush existing surface rock and mix the fragments into the top 250 mm of subgrade creates an in-situ crushed aggregate layer that, once compacted, provides structural support for vehicle loads. This technique — sometimes called stone burying in Korean farm engineering practice — eliminates the cost of importing crushed aggregate from quarries for short rural track sections.
Forestry & Land-Use Change Operations
Converting former forestry land or scrubland into agricultural use in Korea requires dealing with shallow root systems, accumulated organic debris, and near-surface rock at the same time. The EP-RockMaster’s high-energy rotor impact handles root fragments and rock simultaneously, processing the mixed material into a uniform layer suitable for subsequent disc cultivation and seeding. Where the stone crushing industry typically uses static jaw or cone crushers for quarry material, the EP-RockMaster brings a mobile, tractor-integrated solution directly to the forest edge.
Construction Site Clearing
Residential, industrial, and infrastructure development projects in rocky terrain require surface clearing before earthwork begins. The EP-RockMaster serves as a cost-effective alternative to manual breaking or imported crushing equipment for sites where surface stone volume is high but quarry-scale processing is not justified. Project developers who need a portable stone crusher machine approach — using their existing tractor fleet — find the SC series considerably more economical than mobilizing specialist crushing contractors for site clearing tasks.
Pasture Renovation & Grassland Improvement
Livestock farmers across Korea’s cattle and dairy belts deal with stones that persistently re-emerge in grazed pastures — damaging mowing equipment, causing animal lameness, and reducing effective stocking density. A periodic EP-RockMaster pass — typically every three to five years on actively stoned pastures — keeps surface stone levels below the threshold where they affect machinery operation or animal welfare. The crushed fragments are worked into the soil profile, gradually reducing the total stone population in the top layers over successive treatments.
6. Regulatory Compliance & Industry Standards
Agricultural machinery incorporating PTO drives and high-energy rotating components is subject to machinery safety regulations in all major markets. Understanding the applicable framework is essential before purchasing and deploying a pto driven stone crusher in any jurisdiction.
Korea — RDA & KOSHA Standards
In South Korea, agricultural machinery is regulated under the Agricultural Machinery Act (농업기계화촉진법) administered by the Rural Development Administration (RDA / 농촌진흥청). PTO-driven implements must comply with Korean Industrial Standards (KS) for tractor-implement coupling and PTO shaft safety covers — specifically KS B ISO 5674 for PTO shaft guarding. The Korea Occupational Safety and Health Agency (KOSHA) further requires that PTO shafts operating above 540 rpm carry CE-equivalent guarding, and that operators receive documented equipment safety training before use. Importers must register implements with the RDA before commercial distribution within Korean territory.
European Union — Machinery Directive & EN Standards
EU customers must confirm compliance with the Machinery Directive 2006/42/EC (and its successor Machinery Regulation (EU) 2023/1230, applicable from 2027). Agricultural stone crushers are classified as non-road mobile machinery; they must carry a CE declaration of conformity and comply with EN ISO 4254-1 for agricultural machinery general safety. The PTO shaft must meet EN ISO 5674 guarding requirements, and the machine’s noise emissions must be measured and declared under EN ISO 11684 signage standards. Specific emission regulations (e.g., Stage V) apply to self-propelled versions but not to PTO-driven tractor implements.
United States — ASABE & OSHA Standards
In the US, PTO-driven implements follow ASABE Standard S203 for PTO shaft dimensions and S401 for tractor-implement coupling. OSHA 29 CFR 1910.217 covers mechanical power transmission guarding broadly, while OSHA’s agricultural standards (29 CFR Part 1928) apply specifically to farm machinery. California’s CARB regulations apply only to engine-powered equipment; PTO implements are outside scope. State-by-state right-of-way width limits (typically 4.2 m maximum for transport on public roads) must be observed when transporting the SC 250 model, whose total width of 3046 mm approaches common transport limits.
Australia, Japan & Other Asia-Pacific Markets
In Australia, agricultural machinery safety is addressed by AS/NZS 4024.3502 (safeguarding of machinery) and state-based WHS regulations. Japan’s Ministry of Agriculture, Forestry and Fisheries regulates imported agricultural machinery under the Agricultural Mechanization Promotion Law; PTO implements require conformity confirmation before distribution. Taiwan’s Bureau of Standards, Metrology and Inspection (BSMI) mandates CNS-standard compliance for imported agricultural equipment. In all cases, confirming local registration and safety marking requirements with the importer or local agricultural authority before deploying a tractor driven stone crusher is strongly recommended.
The EP-RockMaster is supplied with a PTO shaft guard conforming to ISO 5674, a rear safety deflector chain curtain to limit stone-throw distance, and a clearly visible operator warning panel per EN ISO 11684. Documentation for customs declaration and equipment registration is provided on request.
7. About Us – Agricultural Stone Crusher Manufacturer
We are a dedicated manufacturer of professional-grade PTO stone crushers and agricultural land preparation equipment, with a production record covering the full range from compact small pto stone crusher models for smaller tractors through to the heavy SC series EP-RockMaster for high-horsepower operators. Our engineering team designs every machine component with field durability as the primary criterion — because equipment that fails in remote terrain creates costs that far exceed any initial price saving.
We supply B2B customers globally, including agricultural cooperatives, land development contractors, government infrastructure agencies, and equipment rental companies. Our Asia-Pacific supply network services Korean importers directly, with technical documentation available in Korean on request. From initial specification enquiry through spare-parts support during the machine’s working life, we provide the full-service relationship that professional buyers need when sourcing capital equipment for long-term deployment.
Whether you are evaluating a pto stone crusher for sale for the first time or replacing an end-of-life machine in an existing fleet, our technical team can assist with model selection, tractor compatibility confirmation, and logistics coordination to your port of choice. Contact us for a technical datasheet or to discuss your project requirements directly.
8. Related Products — Complete System Supply
A stone crusher for tractor is only as reliable as the drivetrain components connecting it to the tractor’s power output. We manufacture a full range of compatible PTO shafts and gearboxes, allowing you to source the crusher and its driveline components from a single supplier — eliminating compatibility uncertainty and simplifying spare-parts management across the machine’s working life.
PTO Shafts & Gearboxes
The EP-RockMaster’s 1000 rpm PTO drive requires a precisely rated driveshaft and gearbox matched to the torque load generated during stone impact. We supply rated PTO shafts in a range of lengths and cross-joint configurations, along with gearbox assemblies for the SC series. Using matched components from the same source ensures warranty validity and eliminates the dimensional mismatches that cause premature driveshaft failure.
Frequently Asked Questions
Editor: PXY
