Used Koenig & Bauer Cylindrical Grinding Machine for sale (66,293)

Condition: excellent (used), KELLENBERGER PRECISION UNIVERSAL CYLINDRICAL GRINDING MACHINE TYPE: 600 U YEAR OF MANUFACTURE: 2003 PARTIAL OVERHAUL: 2026 (Technical data see attached documents) Center height: 175 mm (without height adjustment) Grinding length: 600 mm Equipment: - Standard accessories - Internal grinding device for D: 80 mm max. incl. coolant supply through the workpiece spindle - Grinding wheel equipment left for D: 400 x 50 x 127 mm (standard) - Grinding wheel equipment right for D: 300 x 40 x 127 - Grinding wheel flange for wheels D: 400 x 50 x 127 mm (left) and D: 300 x 40 x 127 (right), balancing weights outside (3 pieces left, 2 pieces right) - Variable spindle drive with Danfoss frequency converter - Balancing device for dynamic balancing, type ELASO MANOBALANCE 750/EB 2000 - RENAUD internal grinding spindle type REN 828 (grease-lubricated with compressed air lock) - Various internal grinding mandrels for REN 828 – 1235, 1645, 2060, 2575 (4 pieces) - Various chucks HJNZ 28 for HJN 828 with 2 collets D: 3 mm and D: 6 mm - Tailstock standard MK 5 with adapter flange DIN 55027 size 5” Bore D: 38.2 mm (standard) - Sine bar on the tailstock - Tailstock with manual retraction for quill travel - Micrometer adjustment on the tailstock - Pneumatic relief of the tailstock - FORKARDT planetary three-jaw chuck D: 200 mm Psdpfx Aszhma Def Ssgt - REISHAUER wedge-bar three-jaw chuck D: 160 mm - Permanent magnet chuck D: 200 mm - Collet chuck for Schaublin B32 - Set of 59 collets Schaublin B32, D: 1.0 – 30.0 mm, graduation 0.5 mm - Set of 8 workpiece supports incl. holder - Three-jaw steady rest, 175 mm, foldable, D: 3-120 mm - Swiveling dressing tool for dressing during external, surface or internal grinding - Side and angled dressing tool for side and angled dressing of the grinding wheels - Dial indicator stop for table swiveling with dial indicator 1/100 mm - Dial indicator stop for table longitudinal movement with dial indicator 1/100 mm - Dressing stop for internal grinding - HEIDENHAIN Digital length measuring system for the X and Z axes - STREULI paper band filter SPB 3, 90 l/min at 0.26 bar, tank volume 240 l - WALDMANN machine lamp - Set of vibration-damping pads - Three-color paint finish (light gray RAL 7035/blue RAL 5012/dark gray RAL 7016) - New acceptance test report according to KELLENBERGER standard - CE conformity - Documentation Condition: very good, machine geometrically and mechanically overhauled (see geometry report)

Condition: used, grinding diameter 350 mm grinding length 1500 mm centre height 175 mm Grinding wheel left 500mm diameter Grinding wheel head fix. No swivelling possible. With new control. With new enclosure Overhauled according to Kellenberger protocoll Pgsdpfx Afjt Ii Rfo Sot

Condition: refurbished (used), machine/vehicle number: 3439.39, Universal cylindrical grinding machine for external and internal cylindrical grinding. • Distance between centers: 650 mm Psdpfxexxy A Ts Af Segt • Height between centers: 175 mm • Completely overhauled (refurbished) – The machine was completely disassembled and rebuilt component by component. Guide rails were reconditioned, bearings were replaced, new control cabinet and new electrical installation, complete new paint job, and geometrical readjustment for maximum precision. • Equipped with a digital measuring system (Fagor). • Machine condition comparable to a new machine, ready for immediate use. • Extensive accessories included in the scope of delivery, as shown in the photos. • Demonstration under power and test run possible at any time. Availability: Available for immediate delivery!

Condition: used, Year of construction: 1995, grinding diameter 350 mm grinding length 1000 mm centre height 175 mm Teilüberholte Maschine mit Messprotokoll nach Neumaschinentoleranz NEUE Steuerung Eckelmann ENC mit BEMA Schleifsoftware KEL-ASSIST für Kelco 90 numerisch gesteuerte B-Achse Innnschleifrinrichtung Dia 80mm Schleifscheibe links Durchmesser 400mm Schleifscheibe rechts Durchmesser 300mm Innenschleifspindel HJN 828 Pedjyatx Sjpfx Af Sjgt hydraulischer Reitstock Mikroverstellung KEL SET Messsystem

Condition: good (used), Tos Hostivar cylindrical grinding machine Type: 1U X-path: 900 mm bed: 900 x 140 mm Turning diameter bed: 260 mm Chuck diameter: 120 mm Diameter grinding stone max: 320 mm Dimensions: 150x105x140 cm LxWxH Pedpfoq H Ap Nex Af Segt

Condition: used, Maximum grinding length: 1000 mm Psdpev Taafjfx Af Ssgt Maximum wheel diameter: 320 mm Bore: 30 mm Manufacturer: TOS

Condition: used, grinding diameter 250,350,450 mm grinding length 1500 mm centre height 125,175,225 mm grinding wheel diameter 400 mm grinding wheel width 50 mm bore 127 mm MK5 work piece spindle speed 20-400 U/min grinding head swivelling 360 ° Pgsdpfx Afsd Ih Dwo Sjt grinding spindle head - swivable 180 + - ° grinding spindle speed 1500,1700,2200 U/min 0,001-0,030 mm/Ø 0-0,95 mm/Ø ± 6 ° longitudinal feed of the table 1750 mm table speeds 0,02-6 m/min 130 kg 130 inkl. Spannugkg kg 80 mm total power requirement 6,5 kW weight of the machine ca. 2,9 t dimensions of the machine ca. 5,6 x 2,0 m Overhauled with geometric KELLENBERGER protocoll. Pictures of a similar 1000mm machine. -New electrical cabinet -Modern workhead -Modern tailstock -Modern hydraulic power unit -air lift for grindingwheeel head -modern internal grinding device Extension of the upper table swivel to 10° Optional: -Swivel angle digital read out upper table -Swivel angle digital read out workhead -Swivel angle digital read out grindingwhell head -Splash protection door z-axis -Splash protection housing x-axis etc. ADDITIONAL: -we can offer service for the machines -we can offer technical advice -we can offer training -we have spare parts -we have accessories

Condition: used, machine/vehicle number: 48457-57, type of input current: three-phase, input voltage: 380 V, Stationary Disc Sanding Machine Ø 410 mm Professional stationary disc sanding machine for woodworking applications. Robust and stable industrial design, suitable for sanding edges and end surfaces of wood, MDF, plywood, and other panel materials. Technical specifications: Sanding disc diameter: 410 mm Motor power: 1.5 kW / 2 HP Motor speed: approximately 1,400 rpm Electrical connection: three-phase, motor plate 220/380 V, 50 Hz Adjustable metal worktable Stable metal stand included Overall dimensions: approximately 640 × 450 × 1,300 mm The machine is used and shows normal signs of wear and tear. It is in working condition and ready for operation. Pgodsz Dwhbepfx Af Sst Suitable for carpentry shops, furniture manufacturers, woodworking workshops, and individual craftsmen. Inspection and functional testing are possible by prior arrangement. The machine is located in Latvia, near Riga. Loading onto the buyer’s vehicle can be arranged. Price: EUR 490 net, plus VAT. Internal reference number: 48457-57

Condition: ready for operation (used), A Joerg CNC precision cylindrical grinding machine for tools and rotationally symmetrical precision parts is available. Workpiece diameter range: 0.1mm-16mm, Speed: 10000rpm, Workpiece holding: W20/W25, Max. workpiece length: 250mm. Machine dimensions X/Y/Z: approx. 1900mm/2000mm/1950mm, Weight: approx. 3000kg. Documentation available. An on-site inspection is possible. Pgjdpezhb Ebefx Af Sjt

Condition: excellent (used), functionality: fully functional, center height: 125 mm, grinding length: 600 mm, grinding diameter: 249 mm, control cabinet length: 1,200 mm, control cabinet width: 40 mm, grinding spindle speed: 1,530 rpm, control cabinet height: 1,500 mm, overall weight: 3,250 kg, For sale is a cylindrical grinding machine manufactured by Kellenberger. The machine is in very good condition. Make: Kellenberger Model: R 125x600 Technical Specifications: Centre distance: 600 mm Centre height: 125 mm Workpiece diameter: 249 mm Power requirement: 10 kW Table: Travel: 700 mm Travel per handwheel turn, coarse/fine: 20/2.5 mm Speed, hydraulically adjustable: 0.02–6 m/min Minimum reversing travel: 1.5 mm Dwell time at reversal, adjustable: 0–5 sec Swivel range: 11 degrees Cross slide: Travel with feed handwheel, coarse/fine: 220 mm Travel per handwheel turn, coarse/fine: 4/0.5 mm Rapid traverse and return, hydraulic: 50 mm Feed, electro-mechanical with stepper motor: 0–9.99 mm/Ø Micro-stop of feed, per graduation: 1 µm/Ø Plunge grinding: Feed rate coarse/fine: 1–49/0.2–2.8 µm/sec Grinding spindle head: Pgsdpfoyyn Ehsx Af Set Grinding wheel, diameter x width x bore: 500 x 80 x 203.2 mm Motor rating: 5.5 kW Grinding spindle speeds: 1220, 1360, 1530 rpm Workpiece spindle head: Swivel range: 360 degrees Speeds, steplessly adjustable: 20–400 rpm Spindle internal taper: Morse 5 Motor rating: 0.9 kW Tailstock: Quill internal taper: Morse 3 Quill travel: 30 mm Machine dimensions: 2800 x 1850 mm Weight: approx. 3000 kg

Condition: good (used), Year of construction: 2011, Maximum grinding diameter 290mm, maximum grinding length 800mm, grinding wheel size 290mm x 63mm bore. Control Fanuc 21i-TB, workhead speed 1,000rpm, spindle power 5Kw, table swivel +6/-3.5 degrees, Pedpfx Afstudfde Sjgt workhead swivel angle 0-90 degrees. internal spindle motor 1.5kw. fitted with coolant.

Condition: refurbished (used), Year of construction: 2025, operating hours: 50 h, machine/vehicle number: 3018-04, Country of manufacture: Switzerland Voltage: 380/50/3 Net weight: 3100 kg Overall dimensions: 230x155x170 cm Installed power: 13 kVA Customs tariff position: 8460.2920 TECHNICAL SPECIFICATIONS MAIN DIMENSIONS Distance between centers: 650 mm Grinding capacity SpW+bs: -80 Stroke: 700 LONGITUDINAL SLIDE Max stroke: SpW+50 mm Minimum automatic feed: 1.5 mm Speed: 50-5500 mm/min Reversal delay: 0-6 sec Maximum table swivel: 12°/10°/8.5°/6° Pneumatic relief for table and workhead CROSS SLIDE Pedpjw T Sd Tefx Af Segt Max stroke: 300 mm Rapid traverse: 60 mm Plunge grinding depth in diameter: 3.4 mm Feed 1: 0.012-6 mm/min Feed 2: 0.012-1.2 mm/min Feed per pulse: 0.001-0.05 mm GRINDING WHEEL HEADSTOCK Left-side wheel, external grinding: 400x80x127 mm Drive power: 5.5 kW Peripheral speed: 35 m/s RPM: 1670/2110 min-1 Internal grinding device for belt-driven spindles, including drive unit: 1.5 kW WORKHEAD Swivel range: 0-90° Continuously variable RPM: 30-1000 min-1 Internal taper: Morse 5 Collets: W-25 Drive power: 0.55 kW Maximum workpiece weight between centers: 130 kg Grinding load between centers: 100 Nm TAILSTOCK Internal taper: Morse 3 Quill stroke: 35 mm Fine adjustment for cylindricity correction: ± 40 μm TECHNICAL CHARACTERISTICS: GUARANTEED WORKING ACCURACY Straightness of the generator over 630 mm: 0.003 mm Roundness during chuck grinding: 0.0003 mm CONNECTION VALUES Maximum absorbed power: 13 kVA Maximum permitted voltage fluctuation: -15%/+10% Maximum permitted frequency variation: ± 3% Required compressed air pressure: 5 bar Unless otherwise stated or in case of error or omission, these technical details are provided without engagement.

Condition: used, Year of construction: 2000, grinding diameter 500 mm grinding length 1000 mm centre height 250 mm -major maintenance -New table geometry -partial painting of the interior grinding wheel equipment LEFT 400x63x127mm (standard) grinding wheel equipment RIGHT 300x40x127mm Internal grinding unit Ø120mm for HF spindles CNC control KELCO 120 C-axis for non-circular grinding. Kel-Poly B-AXIS: CNC-controlled B-axis Pgedexzk Nijpfx Af Sst KELCO 120: v constant 35m/s or 45m/s High-frequency internal grinding spindle Operating unit for MFV and MFZ spindles Hydraulic quill retraction for the tailstock NO micro-adjustment on the tailstock Spring-loaded quill insert Top table cooling Standard workpiece headstock MK 5 DIN 55026 size 5" Micro-adjustment for the standard workhead Dressing device on the lower table Active longitudinal positioning KELPOS, MARPOSS, mounted on the grinding head Tool measuring system KELSET, MARPOSS MARPOSS gate sensor Measuring control MARPOSS Minialsar prepared Paper belt filter

Condition: used, Year of construction: 2010, grinding diameter 350 mm grinding length 1000 mm centre height 175 mm Control Fanuc 310is CNC control GE Fanuc 310is Hand panel for CNC control GE Fanuc Wenger loader optional Turned part with automatic indexing 1° Grinding head UR 1-2-3 Grinding wheel equipment left 500 x 80 mm Grinding wheel equipment right 400 x 63 mm Operating unit for one high-speed internal grinding spindle MFV / MFZ High-frequency internal grinding spindle MFN 1090 Coolant supply through the workpiece spindle Dressing unit on the upper table Swivelling holder for PCD diamond plates Basic module for KEL-TOUCH gate sensor and KEL-BALANCE balancing devices KEL-TOUCH lead sensor for universal grinding head variants R / RS / UR / URS KEL-TOUCH on the workpiece headstock for internal and external grinding Preparations for Movomatic ESZ 400 or Marposs P7 ME measuring controls Preparation for external filters Cooling lubricant switch-off for table devices Full casing emulsion Emulsion sanding mist extraction system Maintenance unit for additional pneumatic functions Preparation for KEL-VITA gantry loader KEL-POS, MOVOMATIC: C25 measuring probe Hydraulic preparation for arobo bezel Podpsy U N Hisfx Af Sjgt

Condition: used, grinding diameter 350 mm grinding length 1000 mm centre height 175 mm grinding wheel diameter 400 mm grinding wheel width 50 mm bore 127 mm MK5 work piece spindle speed 20-400 U/min Podpeuxfupsfx Af Sjgt grinding head swivelling 360 ° grinding spindle head - swivable 180 + - ° grinding spindle speed 1500,1700,2200 U/min 0-9,99 mm/Ø 0-9,99 mm/Ø ±8 ° longitudinal feed of the table 1100 mm table speeds 0,02-6 m/min 130 kg cross travel max. 270 mm 130 inkl. Spannung kg 80 mm tailstock quill taper MT 3 quill travel 30 mm total power requirement 6,5 kW weight of the machine ca. 3,05 t dimensions of the machine ca. 4 x 2 m Overhauled according to Kellenberger guidelines including new, modern and future-proof control system. Photo of already delivered machine in centre distance 1000mm. -Operation via the touch panel is extremely simple. -The symbols on the control panel are practically identical to the original original control system, so there is no need for familiarisation. -Diagnostic function with display of PLC messages and digital I/O -Dressing function can be extended or changed at the customer's request. -Orientated spindle stop of the workpiece spindle possible on request. -New maximum infeed of 40 mm can be extended on request. -Digital display in 2 axes. Resolution x-axis 0.5my Options: -Encoder with digital display in the workpiece headstock -Rotary encoder with digital display in the grinding headstock (no height adjustment with spindle possible) with spindle possible) -New stable internal grinding device diameter 80mm or 100mm with height adjustment. -Increase of the centre height to max. 225mm -Speed control for the grinding spindle Included: -Operating tool -Clamping tube for chuck Further accessories on request. The x-axis of the machine has an electronically controlled infeed system with stepper motor drive. Hydraulic longitudinal and rapid traverse table movement. Versatile application in production for external cylindrical and internal internal grinding or for external, face and internal grinding in one clamping clamping of individual parts. Possible options: -Semi-automatic dressing cycles for external and internal grinding -automatic dressing compensation. -Measuring control

Condition: used, Year of construction: 2010, grinding diameter 350 mm grinding length 1000 mm centre height 175 mm Control Fanuc 310is Completely machanically overhauled with grinding process and setup of one part. Original photo taken on the EMO 2010. CNC control GE Fanuc 310is Hand panel for CNC control GE Fanuc Wenger loader optional Turned part with automatic indexing 1° Grinding head UR 1-2-3 Grinding wheel equipment left 500 x 80 mm Grinding wheel equipment right 400 x 63 mm Operating unit for one high-speed internal grinding spindle MFV / MFZ High-frequency internal grinding spindle MFN 1090 Coolant supply through the workpiece spindle Dressing unit on the upper table Swivelling holder for PCD diamond plates Basic module for KEL-TOUCH gate sensor and KEL-BALANCE balancing devices KEL-TOUCH lead sensor for universal grinding head variants R / RS / UR / URS KEL-TOUCH on the workpiece headstock for internal and external grinding Preparations for Movomatic ESZ 400 or Marposs P7 ME measuring controls Preparation for external filters Cooling lubricant switch-off for table devices Full casing emulsion Emulsion sanding mist extraction system Pedpfovdk N Esx Af Sjgt Maintenance unit for additional pneumatic functions Preparation for KEL-VITA gantry loader KEL-POS, MOVOMATIC: C25 measuring probe Hydraulic preparation for arobo bezel

Condition: good (used), functionality: fully functional, Mitutoyo length measuring system, model KA 12 (for longitudinal and transverse movement) Retrofitting with a CNC control system for the draw-in device, including air conditioning unit, Center distance: 630 mm, the machine has no tailstock and was specifically used for chucking operations, Max. grinding diameter: 280 mm, Psdpfxezv Uhrj Af Sogt Max. grinding wheel size: 400 x 40 x 127 mm (not included in the scope of supply), Grinding spindle speed: 2040 rpm, 6 speed stages of the tool spindle: 22.4 to 280 rpm, Drive motor: 4 kW, Accuracy / smallest division value: 0.001 mm, Taper in tailstock and tool spindle: Morse 4 Largest table longitudinal travel: 760 mm, Weight between centers: 120 kg, Total power consumption: approx. 9.3 kW, Machine weight: approx. 2600 kg, Machine dimensions: L 3075 x W 1650 x H 1500 mm Year of manufacture: corresponds to the serial number: 1989 - 1991 Swiveling headstock (± 90°) and grinding head (± 45°), Hydraulic table movement and automatic feed, Cooling system, Machine lighting, Operating manual in German and electrical diagrams.

Condition: used, Year of construction: 2004, functionality: fully functional, center height: 125 mm, overall weight: 4,700 kg, We are offering this used Kellenberger KEL-VISION cylindrical grinding machine, manufactured in 2004, for sale. Pgjdpfoy Uriaex Af Sst Type: KEL-VISION Weight (max.): 4700 kg Year of manufacture: 2004 Machine No.: 665100 Includes a Universal Robots UR5 robot. If you have any questions or require further information, please feel free to send us a message or call us.

Condition: used, grinding diameter 350 mm grinding length 1500 mm centre height 175 mm grinding wheel diameter 400 mm grinding wheel width 50 mm bore 127 mm MK5 work piece spindle speed 20-400 U/min grinding head swivelling 360 ° grinding spindle head - swivable 180 + - ° grinding spindle speed 1500,1700,2200 U/min 0-40 mm/Ø 0-40 mm/Ø ±6,5 ° longitudinal feed of the table 1530 mm table speeds 0,02-6 m/min 130 kg 130 inkl. Spannung kg cross travel max. 270 mm 80 mm tailstock quill taper MT 3 quill travel 30 mm total power requirement 6,5 kW weight of the machine ca. 3,05 t dimensions of the machine ca. 4 x 2 m Overhauled according to Kellenberger guidelines including new, modern and future-proof control system. Photo of machine already delivered with special options -Operation via the touch panel is extremely simple. -The symbols on the control panel are practically identical to the original original control system, so there is no need for familiarisation. -Diagnostic function with display of PLC messages and digital I/O -Dressing function can be extended or changed at the customer's request. -Orientated spindle stop of the workpiece spindle possible on request. -New maximum infeed of 40 mm can be extended on request. -Digital display in 2 axes. Resolution x-axis 0.5my Options: -Encoder with digital display in the workpiece headstock -Rotary encoder with digital display in the grinding headstock (no height adjustment with spindle possible) with spindle possible) -New stable internal grinding device diameter 80mm or 100mm with height adjustment. -Increase of the centre height to max. 225mm -Speed control for the grinding spindle Included: -Operating tool -Clamping tube for chuck Further accessories on request. The x-axis of the machine has an electronically controlled infeed system with stepper motor drive. Hydraulic longitudinal and rapid traverse table movement. Versatile application in production for external cylindrical and internal internal grinding or for external, face and internal grinding in one clamping clamping of individual parts. Possible options: -Semi-automatic dressing cycles for external and internal grinding Podouxftrepfx Af Sjgt -automatic dressing compensation. -Measuring control

Condition: ready for operation (used), Workpiece diameter with/without steady rest: 400mm/250mm, max. workpiece length: 750mm, spindle head load: 400kg, max. internal grinding diameter: 350mm, max. grinding depth: 500mm, travel X/Z: 300mm/1000mm, max. traverse speed: 15m/min, control system: Siemens Sinumerik. Documentation available. On-site inspection is possible. Pedpfsx Uq T Djx Af Segt

Year of construction: 1985, condition: ready for operation (used), Offered is a conventional cylindrical grinding machine. Set to ZRO 40.10, protection class: IP54/IP32, control system: Erfurt electronic. Equipped with integrated control cabinet, workpiece feed system, separate control panel, coolant system. Weight: approx. 380kg, overall dimensions X/Y/Z: approx. 2500mm/1800mm/2000mm. Inspection possible by arrangement. Pgedpfx Afey Ulm Ss Set

Condition: ready for operation (used), Year of construction: 2012, functionality: fully functional, machine/vehicle number: 155847, Round grinding machine Knuth RSM 1000, year of manufacture 2012, fully functional, with internal grinding attachment. Condition: fully functional Year of manufacture: 2012 Location: West Saxony Price: on request Technical data: Manufacturer: Knuth Werkzeugmaschinen GmbH Type: RSM 1000 Serial number: 155847 Power: 9.5 kW Grinding length: 1,000 mm Grinding diameter: up to 320 mm Center height: 180 mm Dimensions: L 3,600 × W 1,650 × H 1,800 mm Machine weight: approx. 3.7 t Equipment: Digital 2-axis position display (DRO) Pgjdpfxjzyltmo Af Set Internal grinding attachment (standard) Steady rest (standard equipment) Central lubrication system Coolant system Description: For sale is a Knuth RSM 1000 round grinding machine, manufactured in 2012, with a digital 2-axis position display. With a grinding length of 1,000 mm and a grinding diameter of up to 320 mm, the machine is suitable for both single-part machining and small-batch production. It comes standard with an internal grinding attachment and a steady rest for machining long workpieces. The machine is fully functional. Inspection and test run possible at the location in West Saxony by appointment. Price: on request Other machines available from site liquidation Takeover of the location negotiable.

Condition: good (used), Cylindrical grinding machine, external cylindrical grinding machine, internal cylindrical grinding machine, centering grinding machine, center grinding machine -Max. shaft diameter: 320 mm -Max. grinding length: 345 mm -Chuck size: Ø 133 mm Psdpfxeduiw As Af Segt -Dimensions: 1925/1135/H1755 mm -Weight: 1592 kg -functionally tested

Condition: used, Cylindrical grinding machine, external cylindrical grinding machine, internal cylindrical grinding machine, centering grinding machine, center grinding machine -Precision universal cylindrical grinding machine Podofig Suepfx Af Sogt -Max. Shaft diameter: 203 mm -Max. Grinding length: 490 mm -Collet: Ø 32 x 87 mm -Grinding wheels diameter: 160 mm -Dimensions: 1660/1500/H1500 mm -Weight: 1802 kg

Condition: used, Year of construction: 2004, grinding diameter 250 mm grinding length 650 mm centre height 125 mm Maschine wird mit Wartung und neuer Geometrie verkauft Betriebsstunden bisher 12260 Reitstock mit Feinverstellung Schleifspindelstock schwenkbar mit 5° Hirtverzahnung Papierbandfilter Marposs Messeinrichtung Innenschleifeinrichtung Pgjdpfxsywntyj Af Sjt