Used Double Wheel Grinding Machine - Vertic. for sale (81,922)

Condition: good (used), Year of construction: 2015, operating hours: 250 h, functionality: fully functional, For Sale: Guideway Grinding Machine (Retrofitted from Metal Planing Machine) We offer a robust guideway grinding machine, which has been professionally converted from an original metal planing machine. The main advantage lies in its relatively compact footprint in relation to the workpiece capacity. Technical Specifications: • External dimensions (LxWxH): 4,800 x 2,500 x 2,000 mm • Required floor space: 4,800 x 3,500 x 2,700 mm (+ control cabinet, coolant tank, access) • Table size: 2,000 x 800 mm • Distance between columns: 1,000 mm • Travel paths (X/Y/Z): 2,000 / 1,000 / 600 mm Upgrades & Features: • New ball screw spindles and bearings Bwsdpoxx Uudjfx Airen • 2 new motors + 2 overhauled motors • 3 new frequency inverters • New Siemens SINUMERIK 802C baseline CNC system • Large grinding spindle: 2,840 rpm – refurbished + new motor • Small grinding spindle: 18,000 rpm – refurbished • Including control cabinet, coolant tank with pump, and separate, wall-mounted inverter for small spindle Inspection and trial run possible by appointment. Please contact us for more information.

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 Bodpfexpyfvox Airjwn 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? 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 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 Bodpfxoxp Urwe Airewn 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? 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, Roll forming metal siding “double façade panel” machine SPM-2 Bsdsxghngopfx Airewn Roll forming metal siding “double façade panel” machine SPM-2 is new design product of our company for façade and wall metal panels forming with the necessary configuration. These double façade panels are very popular in construction business of cladding residential buildings and industrial structures, for the construction of fences of various configurations, gazebos, roofing elements, etc. The SPM-2 metal siding production line is fully automatic and consists of a rolling part of the machine, an automation system and guillotine cutting shears at the machine exit. The line can have as additional parts a manual or automatic uncoiler for metal rolls, depending on the customer's needs. As standard version, this metal siding double façade panels roll forming machine SPM-2 makes a flat panel profile, but with the additional equipment, it is possible to roll panels with a microwave or rib shape profile. To start rolling, it is necessary to install a roll of metal to the decoiler and to put the end of the strip to the first rolling rollers of the equipment and feed it into them. After step by step, to put the metal to the next rollers, adjusting it if necessary. When metal comes to the cutting device of machine you need to feed metal into cutting knives and to make “zero” cut. After such step, equipment can move to automatic operation mode. The control panel of machine has the ability to set the number of tasks and the length of products, single tasks or to work in multitasking mode. After setting up necessary parameters the machine will automatically roll the metal cladding wall panels and cut them into necessary sizes. Thus, the customer will receive final product as quickly as possible and with the highest possible result. The roll forming speed is adjustable and can be up to 10-15 meters per minute. The SPM-2 metal wall cladding panels production line has special tools for punching out fastening holes on the side of the panel. It makes possible for the customer to get more interesting solution options and to offer a wider range of products to the end user. The rolling part of the machine has 18 pairs of forming steps, ensuring high quality of final product. You can get machine with protective cover or without it as per your request preferences. Specifications Material width (mm) 416 The material thickness (mm) 0,4-0,5 Engine power (kW) 3 + 1,1 Rolling speed (m/min) 10-15

Condition: new, functionality: fully functional, power: 11 kW (14.96 HP), Year of construction: 2025, A spiral-type sand washer machine, also known as a spiral sand washing machine or screw sand washer, is a piece of equipment designed for washing, classifying, and dewatering sand and other granular materials. This type of sand washer typically features a spiral or screw-shaped structure for the purpose of lifting, conveying, and washing materials. Here are key features and aspects of a spiral-type sand washer machine: 1. Spiral Structure: The core component of the machine is a spiral or screw-shaped structure, often enclosed within a tub or trough. This spiral impeller is responsible for lifting, conveying, and washing the sand as it rotates. 2. Tub or Trough Design: The spiral structure is usually housed within a tub or trough that holds the water and sand mixture. This design allows for efficient washing and separation of impurities from the sand. 3. Multiple Blades: The spiral impeller typically has multiple blades or flights that provide mechanical agitation to the sand, ensuring thorough cleaning. 4. Water Injection: Water is injected into the tub or trough to aid in the washing process. The combination of water and the rotating spiral helps to remove impurities from the sand. 5. Adjustable Weirs: Some spiral-type sand washers have adjustable weirs or gates that control the flow of water and the retention time of the sand in the machine, allowing for customization of the washing process. 6. Classification and Dewatering: Spiral sand washers often include features for classifying and dewatering the sand. This may involve the use of a separate compartment or mechanism for fine sand recovery and water drainage. 7. Variable Speed: The rotational speed of the spiral can often be adjusted to optimize the washing process for different types of materials and particle sizes. 8. Capacity: The capacity of a spiral-type sand washer is influenced by factors such as the size of the machine, the pitch of the spiral, and the efficiency of the washing process. Different models are available to suit various production requirements. 9. Materials Handling: Spiral sand washers are commonly used in applications such as aggregate processing, mining, concrete production, and other industries where the removal of impurities from sand is essential. Bodeq Nf S Repfx Airewn 10. Ease of Maintenance: Many spiral-type sand washers are designed for easy maintenance, with accessible components and inspection points. Spiral-type sand washer machines are efficient tools for cleaning and processing sand, ensuring that the final product meets quality standards for use in construction, concrete production, and other applications. The specific features and capabilities of these machines can vary between different models and manufacturers.

Condition: ready for operation (used), Year of construction: 2002, functionality: fully functional, travel distance X-axis: 850 mm, travel distance Y-axis: 500 mm, travel distance Z-axis: 450 mm, controller model: Fagor 8055/FL, spindle speed (max.): 1,200 rpm, No minimum price – guaranteed sale to the highest bidder! TECHNICAL DETAILS Travel range, X-axis: 850 mm Travel range, Y-axis: 500 mm Travel range, Z-axis: 450 mm Spindle speed (max.): 1,200 rpm Spindle speed (min.): 30 rpm Bwodpfx Aoy Tv Auoirsn Table width: 530 mm Table length: 900 mm T-slots: 14 mm wide, spaced at 60 mm Table load capacity: max. 400 kg MACHINE DETAILS Control system: Fagor 8055/FL Input voltage: 380 V Input current: Three-phase Connected power: 56 kW EQUIPMENT Documentation/Manual Various tool holders and tools

Condition: ready for operation (used), Year of construction: 2012, functionality: fully functional, machine/vehicle number: GD12002, workpiece weight (max.): 150 kg, grinding length: 1,000 mm, grinding diameter: 360 mm, overall weight: 4,700 kg, No minimum price – guaranteed sale to the highest bidder! TECHNICAL DETAILS Grinding diameter max.: 360 mm Bwjdpfxoy Ukz Uo Airen Grinding length max.: 1,000 mm Workpiece weight max.: 150 kg MACHINE DETAILS Power of the main drive: 5 kW Dimensions & Weight Dimensions (L x W x H): 3,030 x 2,250 x 2,030 mm Weight: 4,700 kg EQUIPMENT PLC controlled Tailstock Work spindle Grinding spindle with flange and grinding wheel Internal grinding device Wet grinding system Electric handwheel Work light Center point Chuck Manual

Condition: used, Year of construction: 2001, Control GE Fanuc Power Mate workpiece dia. 1,5 - 120 mm Bjdpszbvmbofx Airewn grinding length 254 mm dimensions of grinding wheel 610 x 254 x 304,8 mm Grinding wheel peripheral speed 35/50 m/s 305 x 254 x 127 mm engine 22/30 kW weight ca. 6.500 kg range L-W-H 4,10 x 2,25 x 2,40 m In our assessment, the machine is in good used condition and can be inspected under power by appointment. Accessories, tools, and clamping devices shown are only included in the scope of delivery if this is noted in the additional information. Technical data and specifications are subject to change without notice and errors. Prior sale is reserved.

Condition: used, Year of construction: 2015, Technical details: x-travel: 500 mm y-travel: 400 mm z-travel: 330 mm control: FANUC 31i B5 tool change unit: 21 fach rapid traverse in x-y-z axis: 54 m/min taper ISO: BT 30 turning speed range:: 10.000 1 / min spindle drive: 11 / 3,7 kW max. table load: 300 kg surface area: 600x 400 mm Dimensions (L/W/H): 1,6 x 2,1 x 2,25 m rapid traverse: 48 m/min total power requirement: 11 kVA weight of the machine ca.: 2,1 t vertical CNC-milling-drilling machining center, Infrared Touch probe, el. handwheel, autom. door on right side, no internal Coolant Supply, Approx. 65.500 hours "machine on", approx. 8.200 hours "machine run" Bjdsugpk Uopfx Airswn *

Condition: excellent (used), functionality: fully functional, grinding length: 600 mm, grinding width: 500 mm, total height: 1,840 mm, total length: 2,900 mm, total width: 1,840 mm, grinding height: 230 mm, table length: 600 mm, table load: 200 kg, table width: 200 mm, For sale is a DUE Grind surface grinding machine, brand Asyst, model A525 PNC 100. This machine has been completely overhauled from a Jung 525 surface grinder. A key feature of this machine is its ability to operate both conventionally as well as with CNC control. The machine is in very good, near-unused condition and is ready for immediate use. Technical Data: Year of manufacture: Table length: 600 mm Table width: 200 mm X-axis traverse (stroke): 600 mm Y-axis (grinding height): 500 mm Z-axis travel, end positions +/-: 230 mm Table speed X-axis: 0.3-25 m/min Magnetic chuck dimensions: 600x200 mm Optional 3-point dresser: 350x200 mm Max. workpiece weight (incl. magnet): 200 kg Working area: 400 mm Y-axis traverse speed: 0-1,000 mm/min Z-axis traverse speed: 0-1,000 mm/min Y-axis positioning accuracy: 0.001 mm Z-axis positioning accuracy: 0.001 mm Y-axis measuring system resolution: 0.0001 mm Grinding wheel dimensions: 250x30x51 mm Spindle speed: 100-3,800 rpm Bwsdpfsyx D Ipex Airjn Spindle motor power: 100-3,800 kW Automatic dressing with stationary diamond unit TA 3/5 Machine dimensions: 2,900x2,320x1,840 mm Weight: 2,300 kg Transport and loading can be organized Europe-wide at an additional cost if desired. Prices net plus VAT. Viewing is possible by appointment. Please contact us—our team looks forward to assisting you. Trade-in or exchange is possible! Machines Purchase / Sale BUYING & SELLING OF PRODUCTION & METALWORKING MACHINES AND MORE. Are you looking for a high-quality yet affordable metalworking machine for your production, or would you like to sell your equipment? For more information or contact options, please visit our website.

Condition: used, functionality: fully functional, grinding length: 450 mm, grinding width: 175 mm, For sale is a reliable surface grinding machine from the renowned manufacturer ELB-Schliff, type SW4/6HA. The machine is in used but functional condition. "Includes the original, external dust extraction system for effective reduction of grinding dust and sparks directly at the workpiece." Bwedpfx Aijzbr R Nsrjn Technical details: Manufacturer: ELB-Schliff Type: SW4/6HA Machine no.: 29770462 Dimensions of magnetic table: 450 x 175 mm Upon request, transport and loading can be arranged throughout Europe for an additional charge. Prices plus VAT. Inspection possible by appointment. Contact us, and our team will be happy to assist you. Trade-in or exchange possible! Machine purchase/sale PURCHASE / SALE OF PRODUCTION & METALWORKING MACHINES AND MORE. Do you need a high-quality, yet affordable, metalworking machine for your production? Or do you want to sell yours? For more information or contact options, please visit our website.

Condition: good (used), functionality: fully functional, grinding length: 500 mm, grinding width: 350 mm, total height: 2,350 mm, total length: 2,400 mm, total width: 1,900 mm, table length: 900 mm, table width: 300 mm, For sale is an ELB surface grinding machine, model SW 5 VA 1, manufactured in 1972 (machine no. 112630972). It is equipped with a robust hydraulic table drive and, despite its age, is in remarkably well-maintained and immediately operational condition. Technical data: Grinding length (X-axis): 500 mm Grinding width (Y-axis): 350 mm Workpiece height (Z-axis): 300 mm Table clamping area: 900 x 300 mm Magnetic plate: 500 x 250 mm or 400 x 200 mm Table speed: 2 – 25 m/min Grinding wheel dimensions: Ø 300 x 50 x 76 mm Spindle speed: 2,800 rpm Spindle drive power: 4.5 – 5.5 kW Bjdpfx Ajzbrykjirjwn Dimensions & Weight: Footprint (L x W x H): approx. 2,400 x 1,900 x 2,350 mm Machine weight: approx. 2,500 – 2,700 kg Hydraulics: Stepless longitudinal movement of the table for optimal grinding results. Transverse feed: Automatically and manually adjustable. Vertical feed: Manual handwheel feed (fine feed). Documentation: Original operating manual available. Upon request, transport and loading can be arranged for an additional fee, throughout Europe. Prices are exclusive of VAT. Inspection is possible by appointment. Contact us, our team will be happy to assist you. Trade-in or exchange is possible! Machine buying/selling PURCHASE/SALE OF PRODUCTION & METALWORKING MACHINES, ETC. Do you need a high-quality but affordable metalworking machine for your production? Or do you want to sell yours? For more information or to contact us, please visit our website.

Condition: excellent (used), Working travels 860 x 560 x 600 mm Table size 1000 x 560 mm Spindle taper SK40 Spindle speeds -10'000 rpm Tool changer 24 Pos. Bjdpfxezbrrts Airown Control HEIDENHAIN iTNC-530 Coolant through spindle 3D measuring tracer Tool lenght measuring device Misc. accessories MARCELS MASCHINEN CH

Condition: used, Year of construction: 2017, functionality: fully functional, SCHIATTI FPS SME 8 – Year 2017 STRAIGHT GRINDING MACHINE, 8 Wheels Minimum workable size: 80 x 80 mm Thickness: 3–30 mm Speed: 0.5 – 5.5 m/min Power: 14 kW Variable angle: 0–45° 180,000 linear meters processed Bodpfx Aijzbrkiorown

Condition: ready for operation (used), Year of construction: 2021, - USED - 3-AXIS BRIDGE-TYPE VERTICAL MACHINING CENTRE       X-AXIS TRAVEL: 3000 mm Y-AXIS TRAVEL: 2000 mm Z-AXIS TRAVEL: 1000 mm DISTANCE SPINDLE NOSE-TABLE: 350 - 1350 mm RAPID FEEDS X-Y-Z: 20 - 18 - 16 m/min SPINDLE: 6000 rpm; 30 kW; ISO 50 - DIN TABLE SIZE: 3000 x 1800 mm MAX ADMITTED LOAD: 10000 Kg HIGH PRESSURE COOLANT: 25 Bar TOOL MAGAZINE: CHAIN-TYPE ; 60 POS Bedpfx Aozbnrieirswn MAX TOOL DIAMETER: 125 mm MAX TOOL WEIGHT: 20 Kg CONTROL UNIT: HEIDENHAIN TNC 640 WEIGHT: 32706 Kg ACCESSORIES: SWARF CONVEYOR ; PAPER FILTER ; MAGNETIC FILTER ; TOOL SETTER ; LINEAR SCALES ; TOUCH PROBE ; PORTABLE HANDWHEEL

Condition: ready for operation (used), Year of construction: 2000, - USED - 3-AXIS VERTICAL MACHINING CENTRE WITH PALLET CHANGER X-AXIS TRAVEL: 1250 mm Y-AXIS TRAVEL: 700 mm Z-AXIS TRAVEL: 750 mm DISTANCE SPINDLE NOSE-TABLE: 100 - 850 mm RAPID FEEDS X-Y-Z: 15 m/min SPINDLE: 4000 rpm; 26 kW; ISO 50 - DIN PALLET: N.2 TABLE SIZE: 650 x 1400 mm MAX ADMITTED LOAD: 1500 Kg Bedpeyvlxkofx Airewn HIGH PRESSURE COOLANT: 30 Bar TOOL MAGAZINE: CHAIN-TYPE ; 41 POS MAX TOOL DIAMETER: 120 (200) mm MAX TOOL LENGHT: 400 mm MAX TOOL WEIGHT: 20 Kg CONTROL UNIT: FANUC 16i-M WEIGHT: 16750 Kg OVERALL DIMENSIONS: 7135 x 5300 x 3426 mm ACCESSORIES: GEAR BOX ; SWARF CONVEYOR

Condition: excellent (used), Year of construction: 2004, TECHNICAL SPECIFICATIONS Model: ROSILIO C 450 Numerical control – CNC unit – FAGOR 8055 CNC control Bedpfx Aioyl Ng Ajrswn Table dimensions: 770 x 300 mm Travel: X: 450 mm, Y: 400 mm, Z: 450 mm Taper: BT 40 Power: 7.5 kW Spindle speed: 8,000 rpm Machine dimensions: 1900 x 1600 x 2150 mm Weight: 2,900 kg

Condition: used, Year of construction: 2012, turning diameter 320 mm turning height 750 mm Control Siemens max. turning speeds 4500 min/-1 drive capacity - main spindle 26,8 / 20,9 kW max. torque 256 / 200 Nm spindle bore 52 mm spindle head KK A6 (DIN 55026) chucking diameter max. 315 mm number of tool places 8 Pos. tool taper Capto C5 max. workpiece diameter 50 mm max. workpiece weight 0,5 kg x-axis 450 mm z-axis 300 mm rapid traverse x 45 / z 40 m/min total power requirement 68,3 kW weight of the machine ca. 11,0 t dimensions of the machine ca. L 3,7/4,2 x B 1,6 x H 3,0 m In our opinion, the machine is in very good condition condition and can be inspected under power by appointment. Bwjdpfxezbmzpj Airen 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 Subject to prior sale!

Condition: excellent (used), Year of construction: 2020, Table size 1630 x 760 mm, table load 1500 kgs, Traverses XYZ 1525 x 762 x 625 mm, Bjdpfezbkm Nsx Airown rapid feedrates 30m/min, Spindle power 24Kw, spindle speed 12,000rpm, 30 station ATC, spindle taper BT40, through spindle coolant, swarf conveyor, spindle probe , heidenhain tnc 640control.

Condition: good (used), Year of construction: 2018, Traverses X Y Z: 660mm x 406mm x 508mm, table size 762mm x 356mm, 10000rpm spindle, 20 station ATC, BT40 spindle taper, Hurco WINMAX control, Bodpfezbitzex Airjwn coolant.

Condition: excellent (used), Year of construction: 2021, Traverses X Y Z: 660 x 450 x 500mm, Table size 720mm x 420mm, table load 500kgs, spindle speed 12,000rpm, spindle motor power 28Hp, Siemens 828D Control with Shopmill, rapid feed XYZ axis 24m/min, Spindle taper BT40, Bedpfx Aiozbitusrjwn 12 station ATC

Condition: used, machine/vehicle number: 007818, Type of edging: Thin edge, Thick edge Gluing System: EVA Hotmelt Corner Rounding Unit: yes Combination Squaring Edgebanding Machine: First and Second Pass Max Panel Width: 3000 mm Max feed speed: 40 m/min Bsdpfx Aewu Ab Toirjwn Operating Units Right Side: 12 nr Operating Units Left Side: 12 nr

Condition: excellent (used), Year of construction: 2018, Traverses X Y Z 800 x 450 x 510mm, table size 1000 x 450 mm, table load 600KGS, spindle taper BT40, spindle speed 12,000rpm, Bodpfszbhv Iox Airswn 30 station ATC, spindle power 18.5/11Kw, Through spindle coolant, Siemens 828D control

Condition: good (used), Year of construction: 1974, internal diameter 25 - 300 mm grinding depth 250 mm swing diameter 50 mm centre height 300 mm internal grinding diameter 25 - 300 mm spindle bore 70 mm spindle speeds 45 - 450 mm inclination 30 ° table movement in milling step automatic 600 mm/min table speed - backwards 0 - 10 m/min Bwodpfezbc I Sox Airjn spindle turning speed range 3000 - 18000 U/min spindle diameter 120 mm total power requirement 12 kW weight of the machine ca. 4,5 t dimensions of the machine ca. 4,0 x 1,9 x 1,8 m

Condition: excellent (used), grinding diameter 155 mm grinding length 400 mm centre height 80 mm Bsdpfxezbczxs Airswn