Used crushing units for sale (129)

Condition: as good as new (ex-display), Year of construction: 2024, Special price: €29,970 net One machine is currently available for immediate delivery. This machine is ideal for shredding bulky, lightweight aluminum chips or turning chips. Not suitable for heavier aluminum parts. Included: + Optimized cutting geometry + Adapted slide control + Load-dependent controlled hydraulic slide (which presses the chips against the cutting mechanism) Motor: 18.5 kW; 400 V - 50 Hz - 3 phase Knives: 40x40mm, multi-rotatable Rotor diameter: 260 mm Control: Omron PLC Cutting mechanism opening: 600 x 800 mm Hopper volume: approx. 0.6 m³ Hydraulically actuated slide Screen size selectable (15 - 40mm) Suction nozzle Ø 160 mm Weight approx. 1,300 kg Dimensions (l x w x h) approx. 1737 x 1167 x 1650 mm The following options are available at an extra cost: - Raise the shredder by 30 cm (preparation for conveyor belt) + €2,990 net - Inclined conveyor belt (discharge height approx. 220 cm) + €9,770 net - Overband magnet + €6,980 net - Control for conveyor belt and overband magnet + €2,750 net (Start and stop synchronized with the shredder) Njdpfegmh H Tsx Aftscw We would be happy to provide a free test with your material. We invite you to visit us in Neckartailfingen for this purpose. Alternatively, you can send us your material via a freight forwarder, and we will document the test with photos and videos.

Condition: as good as new (ex-display), Year of construction: 2025, Demonstration machine with approximately 9 operating hours Another machine, available immediately (ex works Neckartailfingen) Ncjdpeb Ny Eyofx Aftow *Options available at an extra charge - see below Included: + Profile rotor for higher throughput We would be happy to provide a free test with your material. We invite you to visit us in Neckartailfingen for this purpose. Alternatively, you can send us your material via a freight forwarder, and we will document the test with photos and videos. Motor: 18.5 kW; 400 V - 50 Hz - 3-phase Knives: 15 pieces, reversible Option: double knife row + €995 net Rotor diameter: 260 mm Control: Siemens S7-1200 PLC Cutting chamber opening: 630 x 820 mm Hopper volume: approx. 0.6 m³ Hydraulically actuated slide Screen mesh size as desired (10 - 40 mm) Suction nozzle Ø 160 mm Weight: approx. 1,300 kg Dimensions (L x W x H): approx. 1737 x 1167 x 1650 mm Moisture content: < 30% (dry basis) . Standard included: - V-rotor for maximum throughput - Control cabinet with Siemens PLC control - Automatic star/delta start - Fast hydraulics - Auto. OFF when the rotor is idle - Speed 70-90 RPM for high throughput - Cycle control to avoid idle times - Performance-enhancing stepped control of the hydraulic slide - Pertinax guides for hydraulic slide - Vibration-damping machine feet - CE compliant . Optional shredder features at an extra charge: - Raise the shredder by 30 cm (preparation for a conveyor belt) + €2,080 net - Eco-rings: + €1,980 net (recommended for more than 20% hardwood) - Double knife row + €995 net - Special scraper + €990 net (recommended when shredding veneer or paper, or items with a material thickness of less than 3 mm) - Articulating conveyor belt + €8,770 net Angle: adjustable from 0-60 degrees Discharge height: approx. 2000 mm - Automatic overband magnet + €5,980 net Alternatively, a fixed magnet block above the conveyor belt for regular manual removal + €990 net (in case of low metal content) - Control for conveyor belt and overband magnet + €2,750 net (Start and stop synchronized with the shredder) alternatively, manual start and stop of the belts + €595 net . Requirements for the raw material: - The moisture content (dry basis) must be below 30% - Installation temperature: temperature-controlled room at a minimum of +5°C - Metals and mineral contaminants such as sand, stones, etc. lead to increased wear

Condition: new, Year of construction: 2026, Your advantages: + extremely large cutting unit opening with 1300x1200mm + special rotor suitable for hardwood and softwood + Energy-efficient and powerful with 37 kW at start-up Technical specifications: Ncodpfx Aegbkkroftow Colour: grey / blue Feed opening (mm): 1,300 x 1,200 Hopper capacity (cbm): 1.6 m³ Rotor diameter (mm): 368 Rotor speed (rpm): 65 - 125 Power requirement (kW): 37 Screen perforation (mm): 30 - 50 mm - selectable Tools: 37/70 knives Extraction nozzle Ø (mm): 200 mm Dimensions: 2430x2410x1735 mm (lxwxh) Weight (approx. Kg): 3,920 Optional for a surcharge: * to shred veneer or paper (anything thinner than 3 mm) - we recommend a segment floor. The machine in preproduction has not yet installed this. Special option at an additional cost. - 2nd row of knives, for up to 30% more throughput - Fast hydraulics, for increased throughput - Preparation for conveyor belt removal - conveyor belt - HAWK-EYE overbelt magnet --- Optimal pallet size with the option slide extension = 1200x1400 (option slide extension, the cutting unit opening 1300x1700 surcharge + 12,975.00) * is associated with significantly longer production time. * larger machines on request --- Requirements for the raw material: - The moisture content (atro) must be below 30% - The loading must be free of metals and mineral impurities. This can result in damage to the tools and / or increased wear

Condition: as good as new (ex-display), Year of construction: 2023, Ideal for shredding polystyrene or similar materials. Throughput is highly dependent on the screen and the input material: - up to 60 kg/h for EPS with a 15 mm screen Ncodpfsh S H T Usx Aftjw *the coarser the screen, the higher the throughput. Motor 9.2 / 11 kW - 400 Volts, sturdy steel construction, hardened cutting blades, screen with interchangeable inserts, optional hole sizes: (8), (10), 15, 22, 26, 30, 40, or 60 mm with electric drive, star-delta starter, overload protection, and 8 m power cable, ready for connection, discharge nozzle 150 mm, optional for plastic or corrugated pipes, blowing distance approx. 12 m, chassis with 2 running wheels Ø 380 mm, and one swiveling support wheel Ø 125 mm, all wheels with solid rubber tires, dimensions approx. 1200 x 900 x 1270/1400 mm (l x w x h) weight approx. 240 kg, Spare parts prices and options: 24 hardened blades, €9.90 each (net) 6 bolts, €14.90 each (net) 1 screen, €475 (net) 1 cover, €290 (net)

Condition: new, Year of construction: 2026, Single-shaft shredder MRZ 530 Included: + Profile rotor for increased throughput Options: Double knife row + €895 net Veneer and paper scraper + €970 net * recommended for extremely thin materials with a thickness of less than 3 mm Our mütek single-shaft shredder MRZ 530 shreds a wide variety of materials, such as residual wood of all kinds, softwood, chipboard and hardboard, pallets, construction timber, demolition wood, carpet, cables, paper, cardboard and plastics. The machine is characterized by a robust design, which guarantees consistent quality in continuous operation. We would be happy to provide you with a free test using your material. We invite you to visit us in Neckartailfingen for this purpose. Alternatively, you can send us your material by freight forwarder, and we will document the test with pictures and videos. Machine data: Motor: 15 kW; 400 V - 50 Hz - 3 phase, Knives: multiple rotation, Rotor diameter: 260 mm, Control: Siemens S7-1200 PLC, Hopper (mm) 510 x 810 mm, Hopper volume approx. 0.4 m³, Throughput 1 - 5 hopper loads / h, Hydraulically operated slide, Screen size as required (10 - 40 mm), Suction nozzle Ø 160 mm, Weight approx. 1,000 kg, Dimensions approx. 1550 x 1100 x 1640 mm, Moisture content of the raw material: must be below 30% (oven-dry). Standard included: • Fast hydraulics • Profile rotor • Control cabinet with Siemens PLC control • Automatic star/delta start • Automatic OFF when the rotor is idle • Removable suction chute • Speed 70 - 100 rpm for higher throughput • Cyclic control to avoid idle times • Performance-enhancing step control of the hydraulic slide • Stable guides for the hydraulic slide Further shredder options: - Raise the shredder by 30 cm (preparation for conveyor belt) + €1,980 net - Inclined conveyor belt + €8,770 net Horizontal part: 1200 mm Ascending part: 2500 mm Nedpod Db N Isfx Aftscw Angle: adjustable from 0-60 degrees Discharge height: approx. 2000 mm + - 100 mm - Overband magnet + €5,980 net - Control of conveyor belt and overband magnet + €2,750 net (Start and stop synchronized with the shredder) Requirements for the input/raw material: - The moisture content (oven-dry) must be below 30% - Metals and mineral impurities such as sand, stones, etc. lead to increased wear.

Condition: new, Year of construction: 2026, Delivery time approx. 3-4 months Shredder MRZ 830 Commodity code: 84659600 Feed opening 800x1000 mm Motor: 18.5/22 kW; 400 V - 50 Hz - 3-phase Blades: multiple, rotatable Hydraulically operated slide Screen opening as desired (10 - 40 mm) Njdpfx Asd Dgw Usftecw Suction nozzle Ø 200 mm Weight approx. 1,600 kg Dimensions (l x w x h) approx. 2290 x 1420 x 1750 mm Turbo coupling Standard features include: - Automatic star/delta starter - Fast hydraulics - Auto. OFF when the rotor is idle - Speed 70-90 rpm for high throughput - Cycle control to avoid idle times - Performance-enhancing stepped control of the hydraulic slide - Pertinax guides for the hydraulic slide - Vibration-damping machine feet - CE compliant The shredder is designed for shredding untreated wood, chipboard and MDF boards, and other materials after testing and approval by the manufacturer. Additional shredder options: - Raise shredder by 30 cm (preparation for conveyor belt) + €2,140 net - Articulating conveyor belt + €8,770 net Horizontal section: 1200 mm Rising section: 2500 mm Angle: adjustable from 0-60 degrees Discharge height: approx. 2000 mm + - 100 mm - Over-band magnet + €5,980 net - Control system for conveyor belt and over-band magnet + €2,750 net (Start and stop synchronized with the shredder) Requirements for the raw material: - Moisture content (as received) must be below 30% - Installation temperature: temperature-controlled room at a minimum of +5°C - Metals and mineral contaminants such as sand, stones, etc. will lead to increased wear.

Condition: new, Year of construction: 2026, The ideal machine for shredding softwood. Motor: 11/15 kW; 400 V - 50 Hz - 3 ph, Rotor diameter: 260 mm, Hydraulically actuated pusher Screen perforation to choice (12 - 40 mm) Ncjdpfx Afswzarcjtsw Extraction port Ø 160 mm Weight approx. 1,100 kg Dimensions (LxWxH) approx. 1805 x 1118 x 1650 mm Colour: blue / grey Requirements for raw material: - Moisture content (atro) must be below 30% - Metal and mineral contaminants such as sand, stones, etc. lead to increased wear. We are pleased to offer a free test with your material. You are welcome to visit us in Neckartailfingen for this purpose. Alternatively, you can send us your material by freight and we will document the test with photos and videos.

Condition: as good as new (ex-display), Year of construction: 2025, showroom machine machine available Advantages: + special rotor with reduced knife protrusion + Motor 22 kW + effective square knife * for pallets: up to 10 pallets per hour * depending on the sieve and material. With smaller residual wood, significantly more. Engine: 22 kW; 400 V - 50 Hz - 3 ph, Sieve: 15/20 mm Nsdpfxodv Eu He Aftecw hydraulically operated slide Current screen perforation (15/20 mm) * can be exchanged Extraction nozzle Ø 200 mm. Feed opening 1000x1000 mm Dimensions: 2000x1800x1645mm Example image above: The color of the system may vary Weight: 1920 kg. Included as standard: - Control cabinet with PLC control - automatic star / delta start - fast hydraulics - automobile. OFF when the rotor is idling - Speed ​​70-90 rpm for high throughput - cycle control to avoid idle times, - performance-increasing step control of the hydraulic slide, - Pertinax guides for hydraulic slides, - vibration-damping machine feet, - CE conform. The following options are available at an additional cost: - Additional row of knives + € 2,790 - segment bottom + € 6,890 (recommended for materials with a wall thickness thinner than 3 mm) - Special K-rotor storage + € 3,480 If necessary, consider shredding plastic with sieves smaller than 15 mm or with a lot of fines. If the bearings are lubricated with grease every approx. 4 weeks in operation, this is not necessary) - Raise the shredder by 30 cm (preparation for conveyor belt) + € 2.480 net - Angled conveyor belt (discharge height approx. 220 cm) + € 12.980 net - Overbelt magnet + € 5.980 net - Control conveyor belt and overbelt magnet + € 2.750 net (Start and stop synchronized with the hacker) - Exhibition hopper 1500x1500 mm + € 3.480 net Requirements for the raw material: - The moisture content (atro) must be below 30% - The loading must be free of metals and mineral impurities. This can result in damage to the tools and / or increased wear

Condition: used, Shredding Machine MGZ 1330, 37 kW Operating hours: 275 Included: - Second knife row - Fast hydraulics for increased throughput - Preparation for conveyor belt Optional: - Conveyor belt with automatic metal separator Your advantages: + Extremely large cutting chamber opening; top: 1300x1200mm + Special rotor suitable for both hardwood and softwood + Energy-efficient and powerful, 37 kW start-up power Technical data: Feed opening, top (mm): 1,300 x 1,200 Hopper capacity (cbm): 1.6 m³ Rotor diameter (mm): 368 Rotor speed (rpm): 65 - 125 Power requirement (kW): 37 Ncedpfx Afox Tfdhstsw Screen hole size (mm): configurable Tools: 37/70 knives Extraction connection diameter (mm): 200 mm Dimensions: 2430x2410x1735 mm (LxWxH) Weight (approx. kg): 3,500 --- Feedstock requirements: - The moisture content (atro) must be below 20% - The feed material must be free of metals and mineral contamination. Damage to the tools and/or increased wear may result.

Condition: used, Included container 28,5 m3 Ncodpfsv Hpn Ssx Aftow

Condition: excellent (used), total power requirement 31,7 kW main drive 7,5 kW Input width 550 mm ca. 25/75 mm ventilator 22kW / 10.800 m³/h Industrial shredder or shredding line equipped with carbide blades for shredding various materials such as wood, cardboard, fiberglass mats, or similar items, e.g., as a pre-treatment step for recycling processes. The system consists of two feed conveyors, the shredder, a transport fan, and a soundproof enclosure. Nsdpfoyvvtrox Aftocw

Condition: like new (used), We offer a comprehensive spare parts package for the machine types Doppstadt DW 3060 and Doppstadt AK 430/435/560. These are new and as-new parts! Please request our list! Do you have a problem with your bevel helical or planetary gearbox? We offer qualified repair service, spare parts, and new gearboxes! We will accept your defective gearbox as part exchange after inspection! Please send us your enquiry! Ncedoqx Ur Dopfx Aftjw

Condition: used, Year of construction: 2004, Force Presscylinder: 4000 KN Steel, Gush: 4-6 to/h Aluminium: 3-4 to/h Driving Power: 1x22 kW Arrangement Surface 7x4, 2x4, 1 mxm Machnie weight: 23 to Place: Austria Available immediately Nodolhqc Nspfx Aftjcw

Condition: excellent (used), functionality: fully functional, Used Sandvik CV217 VSI Crusher Year 2012 All New Wear Parts Shotblasted and Painted 185kW Electric Motor Complete With Electric Control Panel Ncedpfxoy Swime Aftsw Complete With Support Legs Approx Weight 9,5000 Kgs Excellent Condition

Condition: used, Year of construction: 2014, operating hours: 17,000 h, overall weight: 52,500 kg, power: 328 kW (445.96 HP), With FABO Guarantee Purchased & Overhauled by FABO: The machine was purchased by our company and has undergone all necessary inspections. Comprehensive Maintenance: All service and maintenance procedures have been meticulously completed. Replaced Wear Parts: All worn-out wear parts have been replaced to meet original quality standards. Nedpfx Afjy Rx Rvjtscw Ready for Immediate Use: The machine is in stock and can be shipped to your construction site the same day it is purchased. Technical Specifications: Model: Sandvik QI441 Serial Number: 1884BG14205 Operating Hours: 17,000 hours Capacity: 300 – 500 tons/hour Crusher Dimensions: 1380 x 800 mm Motor : CAT 328 kW Weight: 52,500 kg Year of Manufacture: 2014

Condition: like new (used), Year of construction: 2019, functionality: unexamined, machine/vehicle number: J-45-1.5, total height: 104 mm, total width: 69 mm, total length: 79 mm, input voltage: 220 V, Unused Allegheny Shredder for “high capacity, built for heavier use” Ncedpfx Afewnbr Rstsw Model: J-45-1.5 Manufacturer: Allegheny Paper Shredders Corporation Year of manufacture: 2019 Dimensions: 79cm x 69cm x 104 cm (LxWxH) Shredder motor: 1.5 hp

Condition: new, Year of construction: 2026, Creating a cheap portable or mobile sand making plant involves optimizing costs while maintaining functionality and efficiency. Here's a basic outline of components and considerations for designing a cost-effective portable sand making plant: 1. Portable Sand Making Machine: - Select a cost-effective sand making machine that meets your production requirements. Consider factors like capacity, efficiency, and maintenance costs. - Look for options that offer good performance at a lower initial investment. 2. Screening Equipment: - Choose a portable screening unit to separate the sand into different sizes. This is crucial for producing high-quality sand with the desired particle size distribution. - Consider modular screening units that are easy to transport and set up. 3. Conveyor Systems: - Utilize conveyors to transport raw materials between different components of the plant. Opt for simple and reliable conveyor systems. - Explore cost-effective conveyor options that are easy to maintain. 4. Hopper and Feeder: - Incorporate a hopper and feeder system to ensure a continuous flow of raw materials to the sand making machine. This helps optimize the production process. - Choose a design that minimizes material spillage and wastage. 5. Power Source: - Consider energy-efficient power sources to reduce operational costs. This could include using generators or connecting to the electrical grid, depending on the availability and cost of electricity in your location. 6. Chassis and Mobility: - Opt for a simple and robust chassis design that allows for easy transportation. Depending on your needs, choose between wheels or tracks for mobility. - Aim for a design that facilitates quick setup and dismantling to save time and labor costs. 7. Control System: - Implement a user-friendly control system that enables operators to monitor and adjust the sand making process efficiently. - Consider automation features that enhance control and reduce the need for constant manual intervention. 8. Dust Control and Environmental Considerations: - Integrate effective dust control measures to comply with environmental regulations and ensure a safe working environment. - Explore environmentally friendly features to align with sustainability goals. 9. Modular Design: - Consider a modular design for easy customization and scalability. This allows you to adapt the plant to varying production needs over time. 10. Used Equipment: Ncjdpfxoq N Ud Io Aftow - Explore the possibility of using refurbished or used equipment to cut down on initial costs. Ensure that the used equipment is in good working condition and can meet your production requirements. Remember that while cost optimization is important, it's crucial to maintain the quality and efficiency of the sand making process. Additionally, compliance with environmental regulations should be a priority. Always consider the specific requirements of your project and seek professional advice if needed.

Condition: new, Year of construction: 2026, functionality: fully functional, power: 75 kW (101.97 HP), Jaw crusher for stone & ore crushing in quarry and mining fields Model: PE600X900 Max input size: 500mm Capacity: 80-135 t/h Motor: 75KW Ncsdpfxoq H Shco Aftew Weight: 15T Besides this models, we also have the other models like PE900X1200, PE500X750, PE250X400, PE400X600, etc, and we also have impact crusher, cone crusher, hammer crusher, vsi crusher, more important we can also provide complete stone crushing screening plant with capacity 30-1000 t/h, welcome to contact us for more details if you want a different model or the other type of crushing machine. You can leave us a message if you need a different model or a different type of crusher.

Condition: new, Year of construction: 2026, functionality: fully functional, FABO Log Washers are designed to remove woods, plastic clay contaminants and other harmful materials from gravel, stone and hard ore feeds. Designed to successfully clean the most difficult materials, FABO Log Washers allow the user to obtain valuable products from what was once considered waste. When selecting a Log Washer, the variety of feed material must be taken into consideration. The volume and shape of the feed material can influence the capacity of a particular size fraction. FABO can provide a list of capacities and water requirements based on the user's material. Ncedjy I Nugepfx Aftsw Key benefits to the buyer include improved wear characteristics, reduced costs and the ability to efficiently wash aggregates and drift out clays/sands/lights (wood/plastics) on one chassis.

Condition: ready for operation (used), Year of construction: 2016, operating hours: 2,100 h, functionality: fully functional, overall weight: 50,500 kg, Sandvik QJ341 jaw crusher 2016 year 2100 hours on crusher 4700 hours on engine CAT C9.3 engine Inlet 1200x750 mm CSS range from 0-65 to 0-150 mm Capacity 150-250 tons per hour depend on material Weight 50,5 tons Fitted with side conveyor Fitted with overband magnet Ncodpfx Afoyn Inkstjw Machine in great working condition, ready for work like NEW

Condition: new, Year of construction: 2026, functionality: fully functional, *All of our products are made with care and covered for 1 year warranty! *Installation and Operator Training FREE Nsdpoy H Aizjfx Aftocw • Model: FABO HY-600 • Type: Double Helix Screw Washer • Capacity: 60 ton per hour • Dimension: 1400 x 6650x1800 mm • Screw Size: Ø 600x6000 mm • Speed: 22 rev/min • Motor: 2 x 5.5 kW Heavy duty Gamak • Water Consumption: 55-205 m3 • Including chassis, motor and safety guards. FOR FURTHER INFORMATION PLEASE FEEL FREE TO CALL US!!!

Condition: new, Year of construction: 2026, functionality: fully functional, overall weight: 50,000 kg, power: 360 kW (489.46 HP), *All of our products are made with care and covered for 1 year warranty! *Installation and Operator Training FREE Fabo tracked impact crusher FTI-110s is a complete mobile system which moves on hydraulicly driven tracked system with 1 km/h speed and combination of a vibrated grizzly feeder, an Impact crusher, foldable stockpile conveyors, control unit and electric generator. In today's conditions and technological processes, businesses are beginning to think about how to make their field of activity more efficient. As they make it more efficient, they always take into consideration factors such as the operationality of the machines they use, their low cost and staffing needs. Our Tracked Crushers can crush with high performance even on the most demanding mine sites with its specially designed body and compact structure. Customization can be done to our tracked systems by Jaw Crusher, Primary and Secondary Impact or Cone Crusher. Advantages of Tracked Crushers; -Heavy-duty walking trackes can reach places where ordinary machines can not reach. -It has the appropriate dimensions and sound level to crush construction waste in the city. -The fuel consumption of the generator and walking track units are very economical. -System maintenance and management is very easy with latest technology control software. TECHNICAL SPECIFICATIONS: Model: FTI-110s Production Capacity: 130-240 tons per hour Maximum Feeding: 500 mm Crusher Type: Impact Crusher SIZE: 1100x1000 mm CSS Setting: 0-50 mm Nodpfoy H Af Njx Aftocw Total Power: 360 kva Vibrating Screen: 1500x2700 mm Weight: 50 tons Dimensions: 2900x3180x14760mm - Low investment and operation cost – Zero substructure preparation – Easiness at usage and maintenance – Easy assembly and disassembly FOR FURTHER INFORMATION PLEASE FEEL FREE TO CALL US!!!

Condition: ready for operation (used), Year of construction: 1999, functionality: fully functional, opening width: 650 mm, power: 36.77 kW (49.99 HP), broyeur à lames . 2 lames fixes / 5 lames mobiles Ncjdpfxeq R Sqlo Aftjw moteur 37kw largeur utile 700 - rotor plein grille 12 mm (possibilité de changer la maille) sortie par ventilation ou visse

Condition: like new (used), Year of construction: 2019, operating hours: 39 h, functionality: fully functional, machine/vehicle number: MZ-7321/19 / 11024, total height: 2,198 mm, total width: 1,648 mm, total length: 3,500 mm, overall weight: 3,500 kg, rotor diameter: 400 mm, rotor width: 850 mm, type of input current: AC, input voltage: 400 V, rotational speed (max.): 100 rpm, power: 30 kW (40.79 HP), As-new single-shaft shredder / size reduction system with minor signs of use. Used solely for testing purposes. The rotor shaft is equipped with a heavy-duty wear protection. Cassette system for rotor knives, 34 x 34 mm. Electric motor 30 kW, total installed power 37 kW, hydraulic power 3.75 kW, 400 V, 3-phase. Additional new rotor and stator knives included as spare parts. German operating manual. Three-part, adjustable stator knives. Hopper lockable, perforated screen 40 mm. The machine can be demonstrated under power. No warranty after purchase. Free loading from factory premises – Raesfeld. Detailed photos available on request. Subject to prior sale. Prices are net prices. Ncsdpfx Afey E S S Aetjw

Condition: new, Year of construction: 2025, Capacity: 1000 - 1500 kg/hour Electric Motor Power: 15 kW Machine Weight: 1800 kg Nedpfod Im Adsx Aftocw