Used Chamber Washing Machine for sale (66,943)

Year of construction: 2020, condition: ready for operation (used), A Guggenberger chamber washing machine is available. Number of wash carts: 8, wash cart capacity: 8 pallets, pallet dimensions X/Y/Z: 1200mm/800mm/160mm, spray pump power: 11kW, fan capacity: 4000m³/h, operating hours: approx. 4350h. Including rotary nozzles, spin drying unit, tilting device, exhaust fan with steam damper, condensate separator, gloss drying, tank heating with booster, compact belt filter system, oil skimmer and steam condensator. Documentation available. An on-site inspection is possible. Kedpfx Ajzlt N Hefkona

Condition: excellent (used), With acid-resistant section, with high pressure nozzles, equipped with a conveyor Overall Size: 9,5 x 1,15 x 1,9 m Opening size: 530 x 250 mm Chemical tank (heated): 0,5m³ Rinse tank (heated): 0,3 m³ Drying fans: 12db Voltage: 380 V Knjdpfx Aet Ity Dofkoa

Condition: new, Year of construction: 2025, functionality: fully functional, CONSTMACH bucket-type sand washers are designed to effectively separate clay, dust, and foreign matter from aggregate materials, thereby improving material quality. Their durable construction and simple design ensure both long-lasting use and easy maintenance. The bucket system consumes minimal energy while washing the material through water circulation and significantly reduces water consumption. This provides an environmentally friendly solution and lowers operating costs. Standing out for their ease of installation and use, CONSTMACH bucket (Wheeled) sand washers are an ideal choice for improving aggregate quality in stationary or mobile crushing and screening plants. CBW-80 Bucket (Wheeled) Sand Washer Technical Specifications Motor Power: 5.5 kW Capacity: 80 – 90 m³/hour Bucket Size: 800 x 550 mm Rotation Speed: 2.5 rpm Wheel Diameter: 3,000 mm Number of Buckets: 40 CBW-100 Bucket (Wheeled) Sand Washer Technical Specifications Motor Power: 7.5 kW Capacity: 110 – 120 m³/hour Bucket Size: 1,000 x 550 mm Rotation Speed: 2.5 rpm Wheel Diameter: 3,000 mm Number of Buckets: 40 Why Choose CONSTMACH Bucket Washers? CONSTMACH is a leading brand offering reliable, efficient, and long-lasting solutions in the stone crushing and screening industry. Manufactured to high engineering standards, our bucket (Wheeled) sand washer models stand out with their minimal maintenance requirements, low operating costs, and high performance. Our professional approach to spare parts supply, technical support, and after-sales service ensures maximum efficiency for our users. By choosing CONSTMACH bucket washers, you can increase quality in your production processes and gain a sustainable production advantage by saving energy and water. Kodpfxoxp Urwo Afksna What Do We Do at Constmach? Constmach is a leading machine manufacturer serving the construction and mining industries with a wide range of products tailored to their needs. Our product portfolio includes concrete block making machines, stationary and mobile concrete plants, stone crushing machines, stone crushing and screening plants, sand washing machines, sand making machines, asphalt plants, conveyor belt systems, jaw crushers, and mobile crushing plants. With its high quality standards, innovative production approach, and customer-focused solutions, Constmach stands out as a reliable brand in both national and international markets. Our products continue to be the preferred choice of industry professionals due to their durability, efficiency, and long-lasting use.

Year of construction: 2025, condition: new, DOLFİN- VDL series Drum (Spiral) parts washing machines are used particularly for the purpose of cleaning small parts that are manufactured in large quantities and in bulk. The materials that are poured from the inlet part of the spiral drum in the device are directed towards the outlet part of the drum with the spirals inside the drum. While the drum moves in its own axis according to the set rotation speed, it subjects its parts to, respectively, washing (degreasing), rinsing, passivation and drying processes (varies per the model). Since these processes are sequential and continuous, all processes are completed quickly and effectively within a single device. Full penetration is ensured by pressurized spraying and dipping effects in each section. It is a very functional model of us that is used particularly for washing the bolts, nuts, washers, or such small parts, fittings, nipples, couplers and fittings that are processed in CNC and automated machines in high quantities. Regardless of the metal type of the parts to be washed, they are fully compatible with steel, brass, aluminum copper or stainless steel materials. Knsdpfx Aev S Dk Sofkea Since Dolfin Parts washing machines operate as closed loop, new water and new detergent are not used every time. While washing is performed for several times with the same tank, all the dirt remains in the washing cell. With this feature, it protects both nature and employees. Due to its high efficiency and performance, saves energy, water and labor. The device operates continuously in accordance with the values of the washing parameters that have been entered from the control panel before operation. Parts that come out of production in bulk can be loaded into our device in 3 different manners. 1. With Vibrating Loading Chamber, 2.With Lift Conveyor, 3. By coupling to our Customer's existing system, Do not hesitate to contact for more information. We produce for you with 40+ years of experience! We export to more than 30+ countries with quality and trust.

Condition: new, Year of construction: 2025, operating hours: 24 h, functionality: fully functional, DOLFİN-PYM2 series parts washing machines are industrial purposed parts cleaning devices that are used before and after revision, particularly in repair and maintenance services. While the parts that are placed in the device are rotated on their own axis by means of the washing basket, pressurized detergent hot water is sprayed. With the pressure, temperature and chemical effect, all oil and contamination on the part is cleaned. Since Dolfin Parts washing machines operate as closed loop, new water and new detergent are not used every time. While washing is performed for several times with the same tank, all the dirt remains in the washing cell. With this feature, it protects both nature and employees. Due to its high efficiency and performance, saves energy, water and labour. It works automatically in accordance with the temperature and time values that are set during operation. Knjdpfx Afsv Sa I Tsksa In order to load, particularly the heavy items into the washing basket or to remove them from the basket, the washing basket can be taken on a carrier trolley, in other words, from the device when required. It can be transferred to any point of the workshop with this trolley.

Condition: new, Year of construction: 2025, functionality: fully functional, CONSTMACH bucket-type sand washers are designed to effectively separate clay, dust, and foreign matter from aggregate materials, thereby improving material quality. Their durable construction and simple design ensure both long-lasting use and easy maintenance. The bucket system consumes minimal energy while washing the material through water circulation and significantly reduces water consumption. This provides an environmentally friendly solution and lowers operating costs. Standing out for their ease of installation and use, CONSTMACH bucket (Wheeled) sand washers are an ideal choice for improving aggregate quality in stationary or mobile crushing and screening plants. CBW-80 Bucket (Wheeled) Sand Washer Technical Specifications Motor Power: 5.5 kW Capacity: 80 – 90 m³/hour Bucket Size: 800 x 550 mm Rotation Speed: 2.5 rpm Wheel Diameter: 3,000 mm Number of Buckets: 40 CBW-100 Bucket (Wheeled) Sand Washer Technical Specifications Motor Power: 7.5 kW Capacity: 110 – 120 m³/hour Bucket Size: 1,000 x 550 mm Rotation Speed: 2.5 rpm Wheel Diameter: 3,000 mm Number of Buckets: 40 Why Choose CONSTMACH Bucket Washers? CONSTMACH is a leading brand offering reliable, efficient, and long-lasting solutions in the stone crushing and screening industry. Manufactured to high engineering standards, our bucket (Wheeled) sand washer models stand out with their minimal maintenance requirements, low operating costs, and high performance. Our professional approach to spare parts supply, technical support, and after-sales service ensures maximum efficiency for our users. By choosing CONSTMACH bucket washers, you can increase quality in your production processes and gain a sustainable production advantage by saving energy and water. What Do We Do at Constmach? Kjdpfx Aexpyfvofksna Constmach is a leading machine manufacturer serving the construction and mining industries with a wide range of products tailored to their needs. Our product portfolio includes concrete block making machines, stationary and mobile concrete plants, stone crushing machines, stone crushing and screening plants, sand washing machines, sand making machines, asphalt plants, conveyor belt systems, jaw crushers, and mobile crushing plants. With its high quality standards, innovative production approach, and customer-focused solutions, Constmach stands out as a reliable brand in both national and international markets. Our products continue to be the preferred choice of industry professionals due to their durability, efficiency, and long-lasting use.

Condition: new, Year of construction: 2025, functionality: fully functional, CONSTMACH log washer (Pallet Washer) is a high-performance washing machine developed specifically for cleaning large aggregates with high clay content. Designed to deliver maximum efficiency under demanding working conditions, this system effectively removes dirt from the material, ensuring high-quality aggregate production in construction, mining, and recycling facilities. Its twin-shaft design creates a powerful scrubbing effect on the material, breaking down even the most stubborn dirt and ensuring clean, ready-to-use material. The CONSTMACH pallet washer offers operators high flexibility with its adjustable shaft angle and speed control, enabling optimal washing performance for different types of aggregates. Its robust body, high-strength material usage, and easy maintenance ensure long-lasting operation. Furthermore, it can process hundreds of tons of material per hour without compromising cleaning quality, even in facilities requiring high capacity. This equipment improves the quality of aggregates used in construction projects, optimizes mineral separation processes in mining, and contributes to the production of reusable materials in recycling plants. Effective removal of foreign matter extends the life of subsequent crushing and screening equipment and reduces operating costs. Log Washer (Pallet Washer – Coarse Material Washer) Technical Specifications Knsdpfx Afexp Urdjksa Machine Size: 2000 x 7000 mm (Double Shaft) Electric Motor Power: 2 x 37 kW, GAMAK Brand, IE3 Efficiency Class, 1500 rpm Feed Size: 0 - 50 mm Main Body Material: S235JR A1 Quality, 8 mm Rolled Sheet Rotation Speed: 15 - 25 rpm Helix: Double Shaft Spiral Pallets, S235JR, 8 mm Sheet, Cast Arms Resistant to Wear and Hardox Coating Shaft: Cr-Ni-Mo Alloy Steel Body: GS52 Steel Casting Bearings: SKF or FAG, Heavy Duty Roller Bearings Production Capacity: 200 - 400 t/h Weight: 24,000 kg Why Should You Choose CONSTMACH Log Washer (Pallet Washer – Coarse Material Washer)? CONSTMACH combines quality, durability, and efficiency with its log washer systems developed through years of experience. Each component is designed for long life and minimal maintenance. Thanks to its high-capacity washing performance, energy efficiency, and ease of use, you will get the most out of your investment in the shortest time possible. CONSTMACH also guarantees the uninterrupted operation of your business with its after-sales support and spare parts services. If you are looking for a reliable solution for clean, solid, and high-quality aggregates, the CONSTMACH pallet washer is the right choice. What Do We Do at Constmach? Constmach is a leading machine manufacturer offering a wide range of products tailored to the needs of the construction and mining industries. Our product portfolio includes concrete block making machines, stationary and mobile concrete plants, stone crushing machines, stone crushing and screening plants, sand washing machines, sand making machines, asphalt plants, conveyor belt systems, jaw crushers, and mobile crushing plants. With its high quality standards, innovative production approach, and customer-focused solutions, Constmach stands out as a reliable brand in both national and international markets. Our products continue to be the preferred choice of industry professionals due to their durability, efficiency, and long-lasting

Condition: new, Year of construction: 2025, functionality: fully functional, CONSTMACH log washer (Pallet Washer) is a high-performance washing machine developed specifically for cleaning large aggregates with high clay content. Designed to deliver maximum efficiency under demanding working conditions, this system effectively removes dirt from the material, ensuring high-quality aggregate production in construction, mining, and recycling facilities. Its twin-shaft design creates a powerful scrubbing effect on the material, breaking down even the most stubborn dirt and ensuring clean, ready-to-use material. The CONSTMACH pallet washer offers operators high flexibility with its adjustable shaft angle and speed control, enabling optimal washing performance for different types of aggregates. Its robust body, high-strength material usage, and easy maintenance ensure long-lasting operation. Furthermore, it can process hundreds of tons of material per hour without compromising cleaning quality, even in facilities requiring high capacity. This equipment improves the quality of aggregates used in construction projects, optimizes mineral separation processes in mining, and contributes to the production of reusable materials in recycling plants. Effective removal of foreign matter extends the life of subsequent crushing and screening equipment and reduces operating costs. Log Washer (Pallet Washer – Coarse Material Washer) Technical Specifications Machine Size: 2000 x 7000 mm (Double Shaft) Electric Motor Power: 2 x 37 kW, GAMAK Brand, IE3 Efficiency Class, 1500 rpm Feed Size: 0 - 50 mm Main Body Material: S235JR A1 Quality, 8 mm Rolled Sheet Rotation Speed: 15 - 25 rpm Helix: Double Shaft Spiral Pallets, S235JR, 8 mm Sheet, Cast Arms Resistant to Wear and Hardox Coating Ksdpoxpxyrsfx Afkona Shaft: Cr-Ni-Mo Alloy Steel Body: GS52 Steel Casting Bearings: SKF or FAG, Heavy Duty Roller Bearings Production Capacity: 200 - 400 t/h Weight: 24,000 kg Why Should You Choose CONSTMACH Log Washer (Pallet Washer – Coarse Material Washer)? CONSTMACH combines quality, durability, and efficiency with its log washer systems developed through years of experience. Each component is designed for long life and minimal maintenance. Thanks to its high-capacity washing performance, energy efficiency, and ease of use, you will get the most out of your investment in the shortest time possible. CONSTMACH also guarantees the uninterrupted operation of your business with its after-sales support and spare parts services. If you are looking for a reliable solution for clean, solid, and high-quality aggregates, the CONSTMACH pallet washer is the right choice. What Do We Do at Constmach? Constmach is a leading machine manufacturer offering a wide range of products tailored to the needs of the construction and mining industries. Our product portfolio includes concrete block making machines, stationary and mobile concrete plants, stone crushing machines, stone crushing and screening plants, sand washing machines, sand making machines, asphalt plants, conveyor belt systems, jaw crushers, and mobile crushing plants. With its high quality standards, innovative production approach, and customer-focused solutions, Constmach stands out as a reliable brand in both national and international markets. Our products continue to be the preferred choice of industry professionals due to their durability, efficiency, and long-lasting

Condition: excellent (used), machine/vehicle number: 577EK51, REF: MM6187 1 x Webomatic double chamber vacuum packing machine supplied with 16 x filler plates. Technical specification ⚙️ Knodpfx Afsxn Rz Eoksa ✅ Model - ED 120. ✅ Serial number - 577EK51. ✅ Sealing bars - 4 x 640mm long. ✅ Distance between sealing bars - 580mm. ✅ Vacuum pump - Busch RA 0100 E 5Z1. ✅ Electrical requirements - 400 V / 50 hz / 3 phase. ✅ Power - 2.2 kW / 5.4 Amps.

Condition: used, Year of construction: 2006, Manufacturer: Kronen Knodpfxjzumawo Afkea Model: GEWA 3800 V Year: 2006 Condition: Used Serial Number: 379 Stock Number: 3368 Capacity max.: 1800 kg/hr Water inlet: 2 3/4" Water outlet: 2 x 2" Infeed height: 1103 mm Outfeed height: 771 mm Power: 3 x 400V, 50Hz, 5.9kW Dimensions: 3800 x 1000 x 1500 mm Weight: 583 kg

Condition: used, This Eillert vegetable washing machine is suitable for washing both light vegetables (leafy greens, baby leaf, rocket/arugula, lamb’s lettuce) and heavier vegetables (carrots, peppers, cabbage, tomatoes). The washing machine is equipped with a single water screw propulsion system (immersion washing), which keeps the product submerged throughout the entire length of the washer. The water pressure can be adjusted using the valves. After the washing process, the products are discharged via a mesh conveyor belt into a centrifuge. The optimal washing effect and mixing action make it possible to process product combinations such as salad mixes, raw vegetable mixes, stir-fry vegetables, and soup vegetables. Production capacity: 400 kg/h (depending on product type and washing time) Equipped with: Mesh conveyor belt with blower Voltage: 400 V (3 + N, 50 Hz) Power: 2.75 kW Weight: 240 kg Year of manufacture: 2014 Machine dimensions (W x D x H): 1660 x 950 x 1670 mm Kedpfezumakox Afkena

Condition: used, Year of construction: 1999, Technical details: pass through height: 2000 mm tank capacity: 800 l Heating: 45 KW cycle time: - sec Heating capacity: 45 kW container volume: 800 l electrics - voltage/frequency: 400/50 V/Hz lifting capacity: 2000 kg temperature range: max. 65 °C total power requirement: 70 KW daylight opening: 2000 mm space requirements of the machine approx.: 3.8 x 3,3 m dimensions of the machine approx. HxWxD: 3,1 x 3,3 x 3,72 m internal dimension: 1,8 x 1,0 x 1,0 m Kodpfx Aoymc Txjfkjna *

Condition: excellent (used), functionality: fully functional, JEROS 5110 Knedpfx Ajv Iz Aqefkja ID.NO. 2926 Jeros type 5110 dishwasher in very good condition previously in a small meat shop. Electric heating completely in stainless steel. Dimensions 80 x 75 cm H 160 cm.

Condition: good (used), Year of construction: 1997, Rust size: 700 x 650 x 1.100 mm (W x H x L) Kjdpfx Aezvfkwjfksna batch weight: 350 kg heating: electrical, 70 kW temperature: max. 80°C

Condition: used, Year of construction: 2015, Dimensions (L/W/H) ca. 4020 x 2460 x 2600 mm total power requirement 78 kW filling amount 1200 l carrying capacity max. 0,5 bath temperature 65 °C heating capacity 54 kW In our opinion, the machine is in good used condition and can be inspected under power by appointment. Accessories, tools and clamping devices shown are only part of the scope of delivery if this is noted in the additional information. Changes and errors in the technical data and information as well as Kjdpozq Hlxjfx Afksna Subject to prior sale!

Year of construction: 2015, operating hours: 100 h, condition: excellent (used), functionality: fully functional, machine/vehicle number: 4S 10kN 2268/000 1215 902, Dyna-Mess TP 10kN HF Cyclic Testing Machine / Endurance Vibration Test Stand – Top Condition, including temperature chamber (up to 120°C) & software Description: Manufacturer: DYNA-MESS Prüfsysteme GmbH Model: TP 10kN HF (Servopneumatic/Servoelectric High-Frequency Cyclic Testing Machine) Maximum test force: 10 kN (Static and dynamic range) Knsdpfx Afezunz Njkja Maximum machine travel: 12mm Date of purchase: December 2015 Condition: Almost new, very little use, immediately ready for operation (Plug & Play) Availability: Immediate For sale is a compact, high-precision cyclic testing machine from the premium manufacturer DYNA-MESS with a 10 kN nominal load and 12mm stroke. The system was acquired for dynamic endurance vibration tests and lifetime determination as part of a research project and has not been used since. It is in excellent, virtually new condition both visually and technically. The complete package includes a matching temperature chamber with controller up to 120°C. This enables standard-compliant, dynamic testing of components and materials under realistic thermal ambient conditions. System & Scope of Delivery: Load frame Dyna-Mess TP 10kN HF with highly accurate force and displacement sensors. Complete PC including installed and calibrated control software DYNA-TCC under Windows 7. The system operates completely autonomously and is immediately ready for operation. Temperature chamber with external control unit for tests up to 120°C. All associated documentation and connection cables. The machine is perfectly suited for laboratories, universities or quality assurance departments looking for a reliable system for fatigue and endurance tests without incurring the budget of new equipment. Inspection of the machine is possible by prior arrangement. As this is a commercial sale, the item is sold ex-works without warranty or guarantee. The sale is preferably to buyers who can collect the item themselves (dismantling and transport must be organized by the buyer). Price: €24,500 negotiable plus VAT.

Condition: excellent (used), Washing machine which can wash a tote bin and its lid at the same time. Excellent condition. Ksdpfx Afsv Ihgvjkjna

Year of construction: 2016, condition: excellent (used), Belimed WD 290 Washing machine / cleaning and disinfection unit This device, made of stainless steel – with an exhaust air condenser (option with a higher design) – is specifically designed for cleaning laboratory glassware, infusion bottles, production parts, and similar items. The WD 290 is available with two automatically operated, vertically moving full-glass sliding doors for visual inspection during the entire processing cycle. Continuous process reliability is also ensured. The machine itself monitors all relevant performance parameters via an independent process data monitoring system. Loading is done manually through a vertical glass sliding door located on the front of the machine. The items to be cleaned (laboratory utensils, laboratory bottles, etc.) are placed on the loading carrier (nozzle car). The nozzle system consists of two rotating external washing arms (top and bottom), through which the individual media, such as washing, rinsing, and cleaning solutions, are passed. The rinsing medium is located externally and fed in depending on the program selection. The WD 290 is equipped with an electric heater for the washing chamber (22 kW) and the dryer (10.5 kW). The usable interior space of 69 x 63 x 80 cm has a capacity of approximately 350 liters (gross: 430 liters). Operating consumption values: Potable water approx. 40 l/min Kjdpjzrfrasfx Afkena Hot water approx. 40 l/min Cold water approx. 40 l/min The system is operated via the panel on the front of the machine. English and German are available as operating languages. By default, 9 pre-programmed cleaning programs are stored.

Year of construction: 2002, condition: ready for operation (used), Basket diameter: 790mm, usable height: 500mm, loading height: 930mm, max. basket load: 300kg, liquid volume: 150l, pump capacity: 1.5kW, heating capacity: 6kW, machine dimensions X/Y/Z: approx. 1200mm/1000mm/1200mm, weight: approx. 220kg. Documentation available. On-site inspection is possible. Ksdpswg E Aqofx Afksna

Year of construction: 1998, condition: ready for operation (used), A glass bottle washing machine PAC Swiss is available. Washing capacity: 7500bottles/h, cycle time: 6.72s, throughput time: approx. 12min, bottle types: Euro/NRW/Ale, bottles per row: 14, max. bottles in the machine: 1456, bottle volume: 330ml/500ml, process: preheating/caustic treatment/recooling/spraying, machine dimensions X/Y/Z: approx. 7050mm/1800mm/2300mm, operating hours: approx. 14175h. Documentation available. On-site inspection is possible. Kjdpfeyhgniex Afkona

Year of construction: 2019, condition: ready for operation (used), A belt washing machine is available for pre-washing and feeding food into downstream machines. Input height: 1000mm, output height: 1000mm, machine dimensions X/Y/Z: approx. 4600mm/1500mm/1500mm, weight: approx. 1000kg. Documentation available. On-site inspection is possible. Knedpfeu Tiyvjx Afksa

Year of construction: 2008, condition: ready for operation (used), A vertical washing and drying system for flat glass is offered: 3 cleaning zones, 6 roller brushes, drying zone (warm air), warm water treatment (heating tank), quartz sand filter, recirculation system, suitable for: float glass, laminated glass, load capacity: 150kg/m², glass thickness: up to 15mm, working height: approx. 2000mm. Inspection possible by arrangement. Ksdpsx Hff Sefx Afkjna

Year of construction: 1999, condition: ready for operation (used), Offered is a continuous parts cleaning system for metal parts. Control system: conventional. Equipped with conveyor belt, integrated filter and pump units, control cabinet, steam damage extraction blower. Weight: approx. 1800kg, overall dimensions X/Y/Z: approx. 4500mm/1600mm/2100mm. Inspection possible by arrangement. Kodpfey Ulmxex Afkona

Year of construction: 2012, condition: ready for operation (used), A glass processing plant with several production lines is available. 1) Cutting line with automatic breaking system 2) Cutting line with automatic breaking system 3) Glass scrap disposal line 4) Glass scrap disposal line 5) Double-sided glass grinding and washing machine Scheppach 2500 C4/0E with washing machine T 4516 133 6) Double-sided glass grinding and washing machine Scheppach 2500 C4/0E with washing machine T 4516 133 and portal drilling machine, max. glass dimensions: 2600x2200mm 7) Control system 8) Water supply system for washing machines with circulation water treatment, sludge dewatering, chemical supply, and additional components 9) Horizontal tempering furnace Tamglass ProE-2442-ABS-20 10) Domino D550+ 10 (55W and 10mm scanner). A large number of spare parts, complete spare robots, and numerous glass racks in various formats are also available for purchase. Complete documentation available. On-site inspection is possible. Kedpfxexcx A To Afkena

Condition: used, TECHNICAL DETAILS - Machine equipped for cleaning polishing paste for luxury industry parts - Module 1 : 2 ultrasonic washing tanks with agitation, 2 rinsing tanks - Module 2 : 1 ultrasonic washing tank, 2 rinsing tanks - FIMM Chemicals M46 and M48 Detergents - Baskets per hour : 8 - Max. weight of basket + parts : 10 [kg] Knodpfx Afjw Ihtaekoa - Heating power : 6 [kW] EQUIPMENT - Ultrasonic generator, model USM 14, power: 1,400 W - Ultrasonic generator, model USM 14 Q, power: 1,400 W - Ultrasonic generator, model SRX 800 P 40, power: 800 W - Automatic lids - Submersible baskets with oscillation capability - Tank dimensions : 300 x 570 x 550 (h) [mm] - With robot