Used Kunzmann Universal Machining Center for sale (69,108)

Condition: like new (used), Year of construction: 2023, functionality: fully functional, DMG CMX 50 Year of manufacture: 2023 Spindle hours: approx. 1,300 h Spindle: 15,000 rpm inlineMASTER Tool holder: SK40 Psdpfx Agey Em Ure Degk Tool stations: 30 slots Control: Siemens 840D sl X travel: 500 mm Y travel: 450 mm Z travel: 400 mm Weight: 4,700 kg

Condition: good (used), Year of construction: 2012, Control Heidenhain iTNC 530 Working area: 800 mm x 1020 mm x 970 mm (x/y/z) Table diameter: 630 x 630 mm Pgjdsrx N Tzepfx Ag Dok Table load: 700 kg Workpiece diameter - max.: 900 mm Rotary table (A-/B-axis) A-axis: -185 / +45 ° B-axis: 360 ° Total power requirement: 42 kVA Machine weight approx.: 22 t Chip conveyor Belt filter system - Motor spindle: 16,000 rpm Drive power: 25/35 kw Max. Torque: 160/223 Nm Spindle holder: HSK-A63 Tool changer: 120-position - Measuring probe - Kinematics package - Tool length checking device - BLUM laser measuring system Tool monitoring - electric handwheel - Suction - 80 bar IKZ system

Condition: excellent (used), Year of construction: 2011, Verfahrwege: X850 x Y500 x Z610 mm 2-Achsen Schwenk-Rundtisch FIBRO HEIDENHAIN iTNC 530 Tischdurchmesser 400 mm HEIDENHAIN Messlineale x,y,z Sperrluft Handrad HR-410 Pgedpeg N Adbefx Ag Dok Wasserpistole Hauptspindel 12.000 Upm mit Direktantrieb 10/17 kW Luftkühlung durch die Spindel 40-fach Werkzeugwechsler SK 40 Schneckenförderer links und rechts Späneförderer Vertikale Schutzabdeckung aus Stahllamellen bis zum Dach M&H Infrarot Messtaster

Condition: good (used), Year of construction: 2002, travel distance X-axis: 1,800 mm, travel distance Y-axis: 2,000 mm, travel distance Z-axis: 1,100 mm, rapid traverse X-axis: 60 m/min, rapid traverse Y-axis: 40 m/min, rapid traverse Z-axis: 40 m/min, rotary table diameter: 1,700 mm, rotational speed (max.): 10,000 rpm, coolant supply: 40 bar, Equipment: chip conveyor, documentation/manual, rotational speed infinitely variable, Universal Machining Center Machine type: DMG DMU 200 P Control: Heidenhain TNC 430 M Year of manufacture: 2002 TECHNICAL DATA: Travel paths: X-axis: 1,800 mm Y-axis: 2,000 mm Z-axis: 1,100 mm B-axis: 0.001° C-axis: 0.001° Number of controlled axes: 5 Speed range: 10,000 rpm Drive power: 44 kW Tool holder: SK 50 Tool changer Tool stations: 60 NC rotary table Table size: 1,700 x 1,400 mm Max. table load: 5,000 kg Equipment features: Chip conveyor Internal coolant supply (IKZ): 40 bar Paper band filter Measuring probe Pgsdpfx Agexuqn Sj Djk Electronic handwheel

Condition: excellent (used), Year of construction: 2016, operating hours: 8,737 h, functionality: fully functional, travel distance X-axis: 3,000 mm, travel distance Y-axis: 800 mm, travel distance Z-axis: 800 mm, rapid traverse X-axis: 30 m/min, rapid traverse Y-axis: 30 m/min, rapid traverse Z-axis: 30 m/min, Matec 30HV 3000x800x800 mm NC swing head +/- 105° swiveling Heidenhain TNC640 Handwheel Motor spindle 15,000 rpm / 30 kW / 198 Nm Tool holder HSK 63A 48 tool pockets Pgedpfoyaa Sfjx Ag Djk ICS (internal coolant supply) 40 bar Belt filter system 450 liters Air through spindle Oil mist extraction (left and right) Partition wall for pendulum operation Side loading door Prepared for additional NC axis 3D triggering probe Renishaw RMP60 Tool breakage control (laser) Clamping hydraulics 100 bar / 10 l/min 2 x clamping circuits, clamping, releasing, manual and via M-function Robot interface The machine has very low operating hours and has always been perfectly maintained. The complete (maintenance) history is known to us. Tools and vices can be taken over if required.

Condition: new, Year of construction: 2024, operating hours: 25 h, SPINNER VC850 high-performance machining center Travels X850, Y510, Z510 mm in "Advanced" version with patented guide cover concept High-precision MILLING SPINDLE up to 12,000 rpm / 15.2KW / 97Nm (max) as in-line spindle with direct drive without belt Tool holder on spindle SK40 DIN69871 TOOL MAGAZINE with 32 tool stations MAGAZINE CLAP pneumatic in the working area DIRECT MEASURING SYSTEMS in X/Y/Z axis CONTROL FANUC 0i-F Plus with the following basic functions: - Contouring control with Fanuc iHMI user interface - Fanuc 15" LCD touch screen, - User memory 2MB, max. 1000 program numbers - USB interface for NC program data exchange, Ethernet interface - max. 4 axes can be interpolated simultaneously - 6+48 workpiece coordinate systems available - 400 tool compensation pairs, with tool life monitoring - with G-code & M-code guidance functions - Comprehensive Fanuc cycle package "Milling" as standard, as G-code and under MGi - e.g. tapping without compensating chuck, thread cutting and engraving. Helical and cylindrical interpolation functions - with scaling, mirroring and coordinate system rotation functions - Parallel programming in the background - Runtime and piece counter - Inch-metric changeover - Electronic handwheel as standard - Dialog language for control trilingual German/English/French UNIVERSAL CHIP CONVEYOR VC850 exiting the machine to the RIGHT PREPARING THE SPINDLE FOR HIGH PRESSURE to use the additional tank up to 22 bar HIGH PRESSURE TANK 22 bar with paper belt filter for flushing centrally through the spindle PREPARATION SPINNER-STANDARDMESSTASTER Blum Cordless SPINDELTASTER Spinner-Blum with tool holder suitable for the milling spindle ADDITIONAL HOOD on top for closed working area, required for high-pressure rinsing or highly atomizing processes or extraction STANDARD DOCUMENTATION GERMAN consisting of machine manual and CNC manuals supplied in digital form on the control unit. Paper manuals for an additional charge RING EYES for crane unloading, set consisting of 4 pcs. absolutely necessary for crane transportation STANDARD PAINTING two-colored in light grey RAL7035 and blue grey RAL5008 Electrical version EUROPA-STANDARD as follows: Operating voltage 3x400V +/-10% Mains frequency 50Hz (+/-2%) TN mains (5-wire) Remarks: The price includes warranty services only within Germany. Pgodpok Raywefx Ag Dok For new and demo machines, the pictures are not necessarily the pictures of the individual machine but of comparison machines The accessories shown, such as clamping devices or tool holders, are only included in the scope of delivery to the extent listed in the technical description. Ask for a detailed offer ex works. Visit our factory near Munich or one of our showrooms. GGF we have other offers of comparable machines. Subject to prior sale.

Condition: excellent (used), Year of construction: 2016, operating hours: 10,250 h, functionality: fully functional, travel distance X-axis: 800 mm, travel distance Y-axis: 800 mm, travel distance Z-axis: 550 mm, rapid traverse X-axis: 60 m/min, rapid traverse Y-axis: 60 m/min, rapid traverse Z-axis: 60 m/min, table width: 800 mm, table length: 630 mm, table load: 1,400 kg, overall weight: 12,500 kg, spindle speed (min.): 20 rpm, spindle speed (max.): 18,000 rpm, operating hours of spindle: 10,250 h, coolant supply: 80 bar, Equipment: chip conveyor, documentation/manual, rotational speed infinitely variable, For sale: Hermle C42U Dynamic in excellent, well-maintained condition. Travel Paths: X: 800 mm Y: 800 mm Z: 550 mm A: +/-130 degrees C: 360 degrees Equipment: Control: Heidenhain TNC 640 Spindle interface: HSK-A63 Spindle speed: 18,000 rpm Large machine table: 800 mm x 630 mm Swivel rotary table with tandem drive Pgedeyma Nkjpfx Ag Dok C-axis with torque drive Dynamic version linear axes IKZ (internal coolant supply) 80 bar with variovalve Scraper belt conveyor Tool changer plus Additional tool magazine ZM50 for a total of 92 tool stations Manual cabin door Manual cabin roof Laminated safety glass window Comfort operator panel External minimum-quantity lubrication Tool measurement A2 Blum (tool breakage/measurement) 3D probe M&H Internal air blow External air blow Bed flushing Handte Compact extraction unit Electronic handwheel Purge air for glass scales Electronic thermal compensation with control functions HIMS basic package Special stop block Interpolation turning TNC 640 Rotoclear visibility aid and more… The machine can be inspected under power by prior arrangement. Machine is immediately available! Loading will be handled by us!

Condition: used, Year of construction: 2004, Technical details: x-travel: 750 mm y-travel: 600 mm z-travel: 520 mm table surface area: D 700 x 500 mm turning speeds: 30000 1/min tool taper: HSK E50 control: HEIDENHAIN iTNC 530 Psdpfx Agey D Tvme Degk tool change unit: 60 pos. rapid traverse: 50 m/min table load capacity - central/maximum: 350 kg total power requirement: 50 kVA weight of the machine ca.: 9 t dimensions of the machine ca.: 3,2 x 2,65 x 2,8 m 5-axis simultaneously HSC-machining center, NC-round-swivelling table B-axis 180°, C-axis 360°, chip conveyor, prepared for 3D touchprobe HEIDENHAIN TS 641 (without touchprobe), mode 4, spindle chiller, no internal coolant supply, approx. 124.200 hours "machine on", approx. 60.600 hours "spindle on" in total *

Condition: excellent (used), Year of construction: 2001, x travel 1600 mm y travel 1000 mm z travel 780 mm Psdpjy Ez Elefx Ag Djgk - number of processing axes (excl parallel axes) 5 - X-axis travel 1600 mm - Y-axis travel 1000 mm - Z-axis travel 780 mm - table surface (left-right) 1000 mm - table surface (front-back) 1000 mm - workpiece load (max) 6000 kg - - positioning/indexing 0.001 ° - - positioning/indexing 2.5 ° - - positioning/indexing 2.5 ° - spindle revolutions (max) 2500 /min - drive power 22 kW - number of positions 60 - number of store positions 2 - pallet length 1000 mm - pallet width 1000 mm - number of pallets 2 - space requirements -left/right- 6400 mm - space requirements -front/back- 6900 mm - total height 4000 mm - total weight approx. 26000 kg control HEIDENHAIN TNC 426 The machine is in very good condition and available immediately.

Condition: like new (used), Year of construction: 2010, functionality: fully functional, CNC machining center Kunzmann WF 7/3 Control: Heidenhain TNC 124 Year of manufacture: 2010 Internal machine no. 53 Pgedjy A Hrfopfx Ag Dsk Machine from training workshop / as-new condition Travel paths: X-axis 600 mm Y-axis 400 mm Z-axis 400 mm Table: 800 x 425 mm Mounting: SK 40 Accessories: - Vice - Tools

Condition: used, Year of construction: 2003, x-travel 800 mm y-travel 700 mm z-travel 600 mm Pgsdpjy A Tdnsfx Ag Dek turning speeds 12000 1 U/min control Heidenhain total power requirement 59 kW weight of the machine ca. 10,6 t

Condition: good (used), Year of construction: 2008, Universal Machining Center Machine type: DMG HSC 75 linear Control: Heidenhain i-TNC530 Year of manufacture: 2008 New spindle: 2025 Power-on hours: 63,133 h Spindle operating hours: 28,596 h TECHNICAL DATA: Travel distances: X-axis: 750 mm Y-axis: 600 mm Z-axis: 560 mm Feed rate (X/Y/Z): 90 m/min Rapid traverse (X/Y/Z): 90 / 90 / 90 m/min A-axis: -10° B-axis: +110° C-axis: 360° Spindle speed range: 28,000 rpm Pedpfx Agjyq H Arj Degk Tool changer Tool holder: HSK-A63 Tool stations: 60 Tool diameter: 80 / 140 mm Tool length: 300 mm NC rotary table: Ø 750 mm Max. table load: 800 kg Table size: fixed table: 950 x 650 mm Max. table load: 1,000 kg Equipment features: Chip conveyor Internal coolant supply (IKZ): [bar] Oil mist extraction Tool breakage control: Blum Laser Measuring probe Mode of operation: 4 Electronic handwheel

Condition: used, Year of construction: 2007, B-axis swival range +/- -90° / +12 ° C-axis 360 ° control HEIDENHAIN - Millplus number of spindle speeds 12.000 U/min numbers of positions in the tool changer 60 tool taper SK40 NC rotary table diameter 600 mm fixed clamping table 1.000 x 600 mm max. table load 500 kg 5-axis simultaneous machining center | DMG - DMU 60 monoBlock equipped with ITC (40bar), a 60-way tool changer, NC - rotary table, Renishaw measuring probe and chip conveyor. Additional equipment information: Pedpfoy A Tbyox Ag Dsgk - NC swivelling head B-axis - NC rotary table C-axis integrated in the fixed table - Direct position measuring system in X/Y/Z (glass scales) - Extraction system - 3D Quickset - Handwheel HR 410 The machine is in a well-maintained condition and can be inspected at any time under power. The machine video from the production plant will be shared on request. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - #Tags: DMU60monoBlock | DMU60 monoBlock | DMU60 | 60 monoBlock

Condition: used, Year of construction: 1996, x-travel 1020 mm Pedpfxjy Apg Ee Ag Dogk y-travel 510 mm z-travel 510 mm weight of the machine ca. 9000 kg

Condition: reconditioned (used), Year of construction: 2014, Immediately available: Traveling column machine FS 1200 • Total travel X=12,000 mm, ideal for flexible large-scale machining Pgjdpfxey Dvthe Ag Dok • Travel X=12,000 mm, Y=1,500 mm; Z=3500mm • Control iTNC 530 with wireless radio handwheel HR 550 FS, operator cabin on the traveling column • 2-axis NC universal drilling, milling head, fully simultaneous and positioning operation per traveling column • Spindle HSK-A 100, 10,000 rpm, 220 Nm spindle torque • IKZ air up to 6 bar • Dust protection packages to protect the guides and drives • BA 4 per traveling column • Radio measuring probe RMP 60, Renishaw make • Work area monitoring with network camera and monitor on the back of the system • Process monitoring ToolScope basic system • Additional control panel on the back of the system • Partial housing consisting of work area and sheet metal door, back with protective fence with a clear view into the work area • incl. fixators • Cooling units • incl. internal tool cooling (closed cooling circuit) with Cooling unit • short delivery time, available immediately, ---subject to prior sale--- Viewing possible by arrangement Spindle hours: approx. 9079 SPECIAL PRICE!

Condition: used, Year of construction: 2003, Universal CNC machining center Manufacturer: AXA Model: VPC 40 U Year of manufacture: 2003 CNC control: Heidenhain TNC 430 Travel (X/Y/Z): 2,300 x 1,200 x 600 mm NC rotary table dimensions: 1,100 x 1,100 mm Fixed table dimensions: 1,100 x 1,100 mm Tool holder: SK40 Tool magazine: 60-fold Spindle speed: 10,000 rpm Psdpfjwwt Nmox Ag Djgk Weight: approx. 20 tons.

Condition: used, Year of construction: 2006, x-travel 1.250 mm y-travel 1.000 mm z-travel 1.000 mm Control MillPlus B-axis (head) -10 - +180 x 0,001 ° C-axis (table) 360 x 0,001 ° feed X/Y/Z/-axis 20 - 10.000 mm/min rapid traverse X/Y/Z 60,00 m/min tool taper HSK 100 spindle turning speed - stepless 20 - 10.000 U/min Pjdpoyui Ncofx Ag Djgk power capacity at 100 % load 25,00 kW power capacity at 40 % load 38,00 KW max. torque at 40% / 100% load 288 / 187 Nm table surface area Ø 1.100 mm table load 1,50 t toolpiece magazine: chain magazine 120 Stück tool diameter 110 mm tool diameter with 2 vacant positions 230 mm tool length - max. 500 mm weight of tools max. 30,00 kg rotary table speeds infinitely variable 10 - 500 U/min total power requirement 85,00 kW weight of the machine ca. 25,00 t dimensions of the machine ca. 9,00 x 6,50 x H3,50m m 5-axis turning/milling machining center with MillPlus IT FD control; dual pallet changer; coolant system; coolant through the spindle; chip conveyor; rotating viewing window; electronic handwheel. Spindle new 10/2025 Turning-table overhaul 2022

Condition: good (used), Year of construction: 2008, functionality: fully functional, Universal machining center Machine type: DMG DMU 60 monoblock Control system: Heidenhain iTNC 530 Year of manufacture: 2008 Availability: immediately / now TECHNICAL DATA: Travel distances: X-axis: 730 mm Y-axis: 560 mm Z-axis: 560 mm Podey Ai Rdjpfx Ag Degk B-axis: +30 / -120° C-axis: 0.001° Number of controlled axes: 5 Spindle speed range: 12,000 rpm Tool holder: SK 40 Tool changer Number of tool stations: 60 NC rotary table: Ø 600 Table size: 1,000 x 600 mm Max. table load: 500 kg Features: Chip conveyor Internal coolant (IKZ): bar Paper band filter Measuring probe: Heidenhain TS 649 Roto Clear Tool breakage monitoring Chip flushing gun Oil mist extraction Operating mode: 4

Condition: reconditioned (used), Year of construction: 2005, functionality: fully functional, CNC Universal Milling & Drilling Machine DECKEL MAHO DMU 80 monoBlock Pgodpsy A Sf Rofx Ag Dok With Heidenhain iTNC 530 path control Year of manufacture: 2005 Travel distances: X 980 Y 630 Z 630 Speed range: 0 – 18,000 rpm stepless (HSK 63) With the following accessories: Rigid angle table, 1250 mm x 700 mm clamping surface 3D measuring probe Heidenhain Tool measurement in the working area via BLUM Laser Vertical tool changer with 32 magazine slots (HSK 63) Full protection enclosure with sliding doors and internal lighting Electronic handwheel Operating modes 3 + 4 Chip conveyor Coolant system 3 height-adjustable machine mounts Spindle oil cooler Control cabinet cooling unit (Rittal) Operating manuals

Condition: used, Year of construction: 2004, Rotary table from DMU 50eV / Series 1104..... including C/B motors and Heidenhain measuring devices Pgodpoy Amkzjfx Ag Dek The rotary table was overhauled in 2023 all bearings and seals are new hoses etc. are also new

Condition: used, Year of construction: 2003, functionality: fully functional, travel distance X-axis: 3,200 mm, travel distance Y-axis: 150 mm, travel distance Z-axis: 115 mm, feed length X-axis: 3,200 mm, feed length Y-axis: 150 mm, feed length Z-axis: 115 mm, spindle speed (max.): 18,000 rpm, We offer this used Tekna 426 universal machining center, year of manufacture 2003. Manufacturer: Tekna Model: 426 Pgodpfx Asyzfc Teg Dok Year: 2003 Machining range: X-axis: 3200 mm Y-axis: 150 mm Z-axis: 115 mm C-axis: -90° to +90° The machine is currently operational. Various spare parts are included. If you have any questions or require more information, please feel free to send us a message or give us a call.

Condition: used, Year of construction: 2005, Technical details: x-travel: 800 mm y-travel: 700 mm z-travel: 600 mm table load capacity: 800 kg control: SIEMENS 840D shopmill turning speeds: 12.000 1/min tool adaptor: HSK 63 rapid traverse: 50 m/min tool change unit: 30 Pos. electr. connected load with add. coolant: 56 kVA weight of the machine ca.: 9,5 t transport measurements machine: 4 x 2,5 x 2,75 m 5 Axis simultaneously machining center, Baxis (NC-head) and NC- rotary-swivelling-table dia 900/630mm, internal cooling device 40 bar, 600l prepared for 3D-touchprobe HEIDENHAIN TS 641 (without touchprobe), Pgjdpfx Agey Ai Nae Dok prepared for el. handwheel (without handwheel), mode 4, approx. 85.000 h mainswich ON , approx. 55.000 h Spindle ON (last spindle change in nJuly 2021 at approx. 50.000h) *

Condition: excellent (used), Year of construction: 2019, functionality: fully functional, The machine can be used as a fully-fledged universal machining centre! We offer you: Manufacturer: DMG MORI Type: Lasertec 125 3D Hybrid Year of manufacture: 2019 Control: Celos with Siemens 840D sl Operate Technical specifications: Travels: X-axis: 1,335 mm Y-axis: 1,250 mm Z-axis: 900 mm Rotary range: 360° Swivel range: +/- 120° Main spindle: Max. speed - main spindle: 20,000 rpm Drive power - main spindle (100/40%): 35 / 25 kW Max. torque: 130 / 86 Nm Rotary table: Table diameter: C-axis 1,250 x 1,000 mm, integrated in fixed table 1,400 x 1,000 mm Max. table load: 2,000 kg Tool changer: Tool holder: HSK-63A Number of tool stations: 60 positions Max. tool diameter: 80 / 160 mm Max. tool length: 500 mm Tool change time (chip-to-chip): 6.5 sec Feed rates: Rapid traverse: 40 m/min Laser specification: Laser type: Fibre-guided diode laser Power: 2,500 W Fibre diameter: 600 μm, NA 0.22 Wavelength: 1,030 +/- 10 nm Focal length: 200 mm Beam quality: 66 mm mrad Power stability: max +/- 2% (2h) Incl. pilot laser: 600 – 700 nm Operating hours: approx. 4,500 h Spindle hours: approx. 1,910 h Technical features & accessories: - Automated changing of the laser processing head for laser deposition or milling operations - Production package, consisting of: - Scraper-belt chip conveyor Pgjdpfsyz Si Tox Ag Dek - Coolant system, 600 l tank - Paper band filter - High-pressure coolant (IKZ) 40 bar - Chip rinsing in the work area door - Rinse gun, 3 bar - Oil and emulsion mist extraction system - Blown air cooling device through spindle centre - Infrared probe, make Renishaw PP60 optical (OMP60) - Tool measurement in the work area, make Blum Laser - Preparation for 3D quickSET - MPC – Machine Protection Control - 4-color signal lamp - Optical powder feed rate sensor - Automatic work area door - Grating footboard - Laser, consisting of: - Processing optics with focusing lens - Focal length 200 mm - Processing nozzle for 3 mm spot diameter - Water-air chiller for laser and processing head - Second collimation optic for 1.6 mm laser spot diameter - Alignment camera for laser/nozzle adjustment - incl. adaptive process control - incl. extraction system with post-filter stage - Active laser safety window - Extended powder feeder, consisting of: - Twin system (dual-channel material feed) - Material capacity (2x): 5 l, feed rate: 0.5 – 15 g/min - 2x mass flow controllers for consistent material build-up - Automatic switching or mixing via simultaneous operation of both powder containers by NC commands - Powder monitoring and laser camera - Electronic handwheel - DECKEL MAHO MDynamics package - ATC (Application Tuning Cycle) - Safety package for power failure Accessories, depicted tools and clamping devices are included in delivery only if specified in the additional information. Modifications and errors in technical data and details, as well as prior sale, are subject to change!

Condition: used, Year of construction: 2002, operating hours: 22,552 h, functionality: fully functional, machine/vehicle number: 11140002063, travel distance X-axis: 1,080 mm, travel distance Y-axis: 710 mm, travel distance Z-axis: 710 mm, controller manufacturer: Heidenhain, controller model: TNC 430, table load: 550 kg, spindle speed (max.): 12,000 rpm, spindle motor power: 15,000 W, number of slots in tool magazine: 32, Equipment: chip conveyor, documentation/manual, rotational speed infinitely variable, 5-axis milling machine, SK 40. Drive amplifier and hard disk "new" January 2025, ball screw "new" 2024. Pgodoy Ahxtspfx Ag Dsk

Condition: used, Year of construction: 2004, operating hours: 47,288 h, functionality: fully functional, machine/vehicle number: 11120011383, travel distance X-axis: 630 mm, travel distance Y-axis: 560 mm, travel distance Z-axis: 560 mm, controller manufacturer: Heidenhain, controller model: iTNC530, table width: 600 mm, table length: 1,000 mm, table load: 350 kg, spindle speed (max.): 12,000 rpm, operating hours of spindle: 15,344 h, coolant supply: 17 bar, spindle motor power: 15,000 W, number of slots in tool magazine: 24, Equipment: chip conveyor, documentation/manual, rotational speed infinitely variable, 5-axis milling machine with production package IKZ 17 bar, active motor spindle cooling Pedpfxsy Ahw Ns Ag Dogk