Used Kunzmann Wf 600 Cnc for sale (18,770)

Condition: excellent (used), Year of construction: 2012, functionality: fully functional, Tool milling machine Kunzmann WF 600 CNC with Heidenhain iTNC 530 control – CE compliant!! Technical data: >> Year of manufacture 2012, machine no. 610149 >> Fixed angular table Hedpfx Aezl D Itsm Tjr >> Speed up to 5000 rpm >> Feed rate, stepless in 3 axes, from 0 to 2000 mm/min >> Travel distances X/Y/Z: 600/400/400 mm >> Table area: 800 x 425 mm >> Table load: 250 kg >> Vertical quill stroke: 60 mm >> Vertical and horizontal quill – SK40 >> Hydraulic clamping system >> Weight approx. 2200 kg >> Space requirement approx.: 2.4 x 2.2 x 2.1 m >> Power 18 kVA Accessories and equipment: >> Heidenhain iTNC 530 control >> Hydraulic chuck, vertical and horizontal >> Automatic central lubrication >> Spindle brake >> Technical documentation, spare parts diagrams, operating manual for the control and programming examples >> Coolant system >> Enclosure >> Machine feet About the machine: Offered for sale is a Kunzmann WF600 CNC tool milling machine with a Heidenhain iTNC 530 control. This universal milling machine is in very good condition. It features a very easy-to-use control system. Furthermore, the machine has a hydraulic chuck for both vertical and horizontal operation. Switching from vertical to horizontal operation is very easy by folding down the vertical head. The guides are regularly lubricated via the central lubrication system. The Kunzmann has been mechanically and electrically inspected by us. Take advantage of the opportunity to inspect and test the Kunzmann on-site while it is powered up.

Condition: used, Year of construction: 1990, Motor output 5 kW Hedpswgnz Njfx Am Tsr Weight 1.500 kg Control cnc

Condition: excellent (used), Year of construction: 2012, functionality: fully functional, Kunzmann WF 600 M milling machine (2012) Manufacturer: Kunzmann Type: WF 600 M Year of manufacture: 2012 Condition: used, very good Control: Heidenhain TNC 124 X-axis 600 mm Y-axis 400 mm Z-axis 400 mm Table length 650 mm Table width 350 mm Spindle speed 4500 rpm Vertical spindle and horizontal spindle - SK40 Hydraulic tightening system Main drive motor: 5.5 kW Hjdpfey S Ez Djx Am Ter Dimensions approx.: 2 x 2 x 2 m Weight approx. 2000 kg Coolant system Scope of delivery: - Documentation - Machine light - Machine feet - Machine vice

Condition: excellent (used), Year of construction: 2014, Kunzmann WF 600 M Tool Milling Machine Kunzmann WF 600 M with Heidenhain TNC 124 Control Year of manufacture 2014 Excellent CONDITION CE-compliant!! Technical Data: Year of manufacture: 2014 Fixed angle table Spindle speed: continuously variable up to 4000 rpm Feeds: stepless in 3 axes from 0 to 2000 mm/min Travel X/Y/Z: 600/400/400 mm Rapid traverse x/y/z: 5 / 5 / 4 m/min Table size: 650 x 350 mm Table load: 250 kg Vertical quill travel: 60 mm Vertical and horizontal spindle, SK40 Hydraulic clamping system Weight approx. 1700 kg Space requirement approx.: 2.3 x 2 x 2 m Drive power: 12 KVA Accessories and Equipment: Heidenhain TNC 124 control Hydraulic clamping vertical and horizontal Automatic central lubrication Hsdoy Sihzopfx Am Ter Spindle brake Technical documentation, spare parts diagrams, operating manual for the control and programming examples Handwheels, coolant unit, tool holders, vise About the Machine: Offered here is a Kunzmann WF 600 M tool milling machine equipped with a Heidenhain TNC 124 control. This universal milling machine is in very good original condition. It comes from a facility where it was only lightly used for training purposes. The control is very easy to operate. Furthermore, the machine features hydraulic clamping both vertically and horizontally. Converting from vertical to horizontal is straightforward, simply by swinging away the vertical head. The guides are reliably lubricated via central lubrication. The Kunzmann has been mechanically and electrically tested at our facility. Take the opportunity to inspect and test the Kunzmann under power at our premises. You can find more milling machines from renowned manufacturers on our website.

Condition: excellent (used), Year of construction: 2002, Used CNC tool milling machine Year of manufacture: 2002 Control manufacturer: Heidenhain Control type: TNC 426 Working area: X: 400 mm Y: 350 mm Z: 400 mm Clamping surface: 650 x 350 mm (fixed table) Milling spindle tool holder: SK40 Spindle speed range: 5 – 5000 rpm Feed rate: 0–2 m/min Tool changer: none Hodpfexz Rkyox Am Tor Accessories: Standard, chip tray, handwheel & documentation including declaration of conformity and data backup

Condition: ready for operation (used), Year of construction: 1999, travel distance X-axis: 900 mm, controller manufacturer: HEIDENHAIN, controller model: TNC 410M, spindle speed (max.): 5,000 rpm, number of axes: 3, This 3-axis KUNZMANN WF9 CNC was manufactured in 1999. It features a reliable Heidenhain TNC 410M control system, ensuring precision and efficiency in operations. If you are looking to get high-quality machining capabilities, consider the KUNZMANN WF9 CNC vertical machining centre we have for sale. Contact us for further details. Hodpjzbu Nzefx Am Tsr • Condition: Good / Fully operational • Control System: Heidenhain TNC 410M

Condition: used, Year of construction: 1990, x-travel 400 mm y-travel 330 mm z-travel 350 mm Hsdpfjt Hxbwjx Am Tor total power requirement 6,3 kW weight of the machine ca. 2 t dimensions of the machine ca. 736 m

Condition: like new (used), Year of construction: 2015, functionality: fully functional, Tool Milling Machine Kunzmann WF 600M with Heidenhain TNC 128 Control System | Excellent Condition | CE-Compliant! Technical Data: - Year of manufacture: 2015 | Machine No. 610398 - Milling table clamping surface: 800 x 425 mm - Clamping slots: 6 - Slot width: 14 H7 - Slot spacing: 63 mm - Maximum load: 300 kg - Spindle speed range: 1 – 4500 rpm Hedpfjwz Eu Nox Am Tor - Infinitely variable feed: 0–2000 mm/min - Rapid traverse (X and Y axis): 5000 mm/min - Z axis: 4000 mm/min - Travel (X/Y/Z): 600/400/400 mm - Vertical and horizontal quill: SK40 - Hydraulic clamping system - Weight: approx. 2025 kg - Dimensions (L x W x H): approx. 2 x 2 x 2 m - Main drive motor: AC three-phase motor - Power rating at 100% duty cycle Accessories and Equipment: - Heidenhain TNC 128 control system - Hydraulic clamping, vertical and horizontal - Automatic central lubrication - Spindle brake - Technical documentation, spare parts diagrams, operating manual - Coolant system About the Machine: Offered here is a tool milling machine Kunzmann WF 600M equipped with a Heidenhain TNC 128 control system. The TNC 128 provides numerous dialog-guided cycles with graphical simulation for quick and easy data entry, such as various drilling cycles, tapping, bolt circles, linear hole patterns, rectangular pockets, rectangular tenons, and surface facing. This universal milling machine is in like-new condition. The control system is very easy to operate. Additionally, the machine features hydraulic clamping for both vertical and horizontal operation. Switching from vertical to horizontal is very simple by swiveling the vertical head to the side. The guides are regularly lubricated by the central lubrication system. The Kunzmann has been mechanically and electrically tested at our facility. You are welcome to view and test the Kunzmann under power on-site.

Condition: ready for operation (used), Year of construction: 2025, operating hours: 58 h, travel distance X-axis: 650 mm, travel distance Y-axis: 500 mm, travel distance Z-axis: 450 mm, controller manufacturer: HEIDENHAIN, controller model: TNC 640 HSCI, total height: 2,900 mm, total width: 2,650 mm, table width: 398 mm, table length: 398 mm, table load: 300 kg, overall weight: 5,500 kg, spindle speed (max.): 12,000 rpm, spindle motor power: 22,000 W, number of slots in tool magazine: 40, tool weight: 8,000 g, positioning accuracy: 0.005 mm, product length (max.): 2,900 mm, number of axes: 5, This 5-axis KUNZMANN WF 650 5AX was manufactured in 2025. It features a maximum spindle speed of 12,000 rpm and a tool magazine capacity of 40 tools. The machine has an impressive X-axis travel of 650 mm, Y-axis travel of 500 mm, and Z-axis travel of 450 mm. If you are looking to get high-quality machining capabilities, consider the KUNZMANN WF 650 5AX vertical machining centre we have for sale. Contact us for further details. • Control Unit Brand: HEIDENHAIN • Control Unit Model: TNC 640 HSCI • A-Axis Travel: +105° / -120° • C-Axis Travel: ±360° • Table Diameter: 398 mm • Maximum Spindle Speed: 12000 rpm • Tool Magazine Capacity: 40 tools • Rapid Feed X/Y: 25 m/min • Rapid Feed Z: 20 m/min • A-Axis Max. Speed: 25 rpm • C-Axis Max. Speed: 25 rpm • A-Axis Positioning Accuracy: ±5 arcsec • C-Axis Positioning Accuracy: ±5 arcsec • A-Axis Torque: 700 Nm • C-Axis Torque: 450 Nm • Control: HEIDENHAIN Conversational / DIN-ISO Programming • Machine Configuration: CNC Swivel Rotary Table (A/C Axis) • Spindle Cooling: Liquid Cooled Motor Spindle • Operating Hours (Program Run): 58 h Accessories: • 19" Touchscreen • HEIDENHAIN HR 510 FS Electronic Handwheel • Automatic Tool Changer • External Coolant System • Internal Coolant Through Spindle (Optional) • HEIDENHAIN TS460 Probe Preparation • TT460 Tool Measurement Preparation • SE661 Probe Receiver Extra Information Hodpjzphg Ijfx Am Tor • Showroom Machine • 12-Month Warranty • Retrofitting and Commissioning Available on Request (Additional Cost) Technical Specification Taper Size SK 40 Through-spindle Coolant No

Condition: ready for operation (used), Year of construction: 2019, travel distance X-axis: 410 mm, travel distance Y-axis: 350 mm, travel distance Z-axis: 450 mm, controller manufacturer: HEIDENHAIN, controller model: TNC 620 FS, table width: 375 mm, table length: 650 mm, table load: 250 kg, overall weight: 1,800 kg, spindle speed (max.): 5,000 rpm, spindle motor power: 6,800 W, number of axes: 3, This 3-axis KUNZMANN WF 410 MC was manufactured in 2019. It features an X-axis travel of 410 mm, Y-axis travel of 350 mm, and Z-axis travel of 450 mm. The machine includes a table size of 650 × 375 mm and a maximum table load of 250 kg. If you are looking to get high-quality machining capabilities, consider the KUNZMANN WF 410 MC vertical machining centre we have for sale. Contact us for further details. • Control Unit Brand: HEIDENHAIN • Control Unit Model: TNC 620 FS • Table Size: 650 × 375 mm • Maximum Table Load: 250 kg • Spindle Taper: SK40 DIN ISO 7388-1 Form AD • Maximum Spindle Speed: 5,000 rpm • Spindle Power: 6.8 kW • Rapid Feed X/Y/Z: 5 / 5 / 5 m/min • Quill Stroke: 70 mm • Operating Voltage: 400 V • Mains Frequency: 50 Hz • Number of Phases: 3 • Connection Power: 13 kVA • Rated Current: 18 A • Main Fuse: 25 A • Short-Circuit Breaking Capacity: 10 kA • Control Voltage: 24 V Hjdpfx Aezpaytsm Tjr • Machine Weight: Approx. 1,800 kg • Maximum Transport Weight: 2,025 kg Accessories: • Machine Enclosure with Safety Doors • Machine Light (LED Flexible Arm) • Central Lubrication System • Coolant System (66 L Tank) • Automatic Mechanical Tool Clamping • Electronic Feed and Spindle Override Potentiometers • Electronic Handwheel HEIDENHAIN HR 510 FS • Probe Preparation Kit for TS 220 / TS 260 • 4th Axis Preparation Kit Extra Information: • Machine only used in training workshop • Fully refurbished in 2026 • 6-month warranty • Retrofitting and commissioning available on request at an additional cost Technical Specification Taper Size SK 40

Condition: excellent (used), Year of construction: 2017, functionality: fully functional, Kunzmann WF 610 MC tool milling machine with Heidenhain TNC 620 control – in SUPER condition, CE compliant! Technical data: >> Year of manufacture 12/2017, machine no. 610759 >> Fixed angular table >> Speed up to 5000 rpm >> Feed rate, continuously adjustable in 3 axes, from 0 to 2000 mm/min >> Travel ranges X/Y/Z: 610/400/450 mm Hjdpfxezl D S Se Am Tor >> Table surface: 800 x 425 mm >> Table load: 300 kg >> Vertical quill stroke: 70 mm >> Vertical and horizontal quill – SK40 >> Hydraulic clamping system >> Weight approx. 2000 kg >> Space requirement approx.: 1.8 x 1.9 x 2.3 m >> Power: 23 kVA Accessories and equipment: >> Heidenhain TNC 620 control >> Hydraulic clamping, vertical and horizontal >> PC additional keyboard for TNC 620 >> Automatic central lubrication >> Spindle brake >> Technical documentation, spare parts diagrams, operating manual for the control and programming examples >> Handwheels >> Electronic handwheel HR510 FS >> Coolant system >> Cabin >> Machine feet About the machine: Offered is a Kunzmann WF600 MC tool milling machine with a Heidenhain TNC 620 control. This universal milling machine is in very good condition. It features a very user-friendly control system. Furthermore, the machine has hydraulic clamping both vertically and horizontally. Changing from vertical to horizontal configuration is very easy, thanks to the fold-away vertical head. The guideways are regularly lubricated by the central lubrication system. The Kunzmann has been mechanically and electrically inspected by us. Take advantage of the opportunity to inspect and test the Kunzmann on-site while it is powered up.

Condition: good (used), Cross support, cross support, cross table, cross-sliding table -Manufacturer: Kunzmann, top head from milling machine type UFV 600 -Dimensions: 530/420/H730 mm -Weight: 80 kg Hodpfx Amsg Dg Rpj Tsr

Condition: used, z-travel:380 mm y-travel:400 mm x-travel:500 mm tool taper:SK 40 vertical head swivelling:beidseitig 90 Grad table-size:LxB 700x425 mm dimensions of the machine ca.:2x2x2 m quill stroke:60 mm groove width:14H7 mm Hjdocxxmqopfx Am Tsr flute distance:63 mm weight of the machine ca.:2 t total power requirement:10 kW Speed range of live tooling:5 - 3000 min -1 Loading:max. 250 kg clamping slots:6 power capacity - milling spindle:5,5 kW

Condition: excellent (used), Year of construction: 2011, Vertical milling head with quill Horizontal spindle Sturdy cast iron frame with flat guides in all axes (hardened) Ball screw spindles Automatic axis clamping Hsdpfszlak Rsx Am Tjr Hydraulic tool clamping Automatic gear shifting Collision protection coupling, Z-axis Distance-coded linear scale measuring systems Mechanical handwheels Automatic central lubrication Chip collection tray Coolant system, free-standing, 70 liters Machine light Leveling elements Chip splash guard Control system: Heidenhain TNC 124 Travel ranges X / Y / Z: 400 / 350 / 400 mm Feed rate X / Y / Z: 0 - 2000 mm/min Rapid traverse X / Y / Z: 5,000 / 5,000 / 4,000 mm/min Table size W x D: 650 x 350 mm Spindle speed: 1 - 4000 rpm Tool holder: ISO 40 / DIN 69871 Weight: approx. 2050 kg Dimensions W x D x H: approx. 1916 x 1868 x 2220 mm Accessories: various tool holders

Condition: new, Year of construction: 2024, Universal milling and drilling machine Kunzmann WF 610 M with Heidenhain TNC 128 control system Paths X/Y/Z = 610/400/450 mm Speed 1-4500 rpm Power 8.5 kW at 100 % ED Spindle SK40 DIN 69871 (form AD) with tightening bolt DIN 69872 Fixed angle table 800x 425 mm 6 x 14 H7 T-slots coolant device 66 liters electric handwheel HEIDENHAIN HR 510 FS Further technical data is available on request. The machine is located at our premises in 71334 Waiblingen-Beinstein, is immediately available and can also be inspected. Please register in advance. Hsdpfx Amsuf Sv Do Tjr

Condition: good (used), Year of construction: 2001, Heidenhain TNC 310 cnc control electronical hand wheel coolant device Hsdjit Tr Tepfx Am Ter Technische Daten: Längsweg (X-Achse) / X-travel longitudinal 600 mm Querweg (Y-Achse) / Y-travel cross 400 mm Senkrechtweg (Z-Achse) / Z-travel vertical 400 mm Werkzeugaufnahme / spindle taper SK 40 Drehzahlbereich / spindle speed range 60-5000 UpM Vorschub / feed 0-2000 mm/min. Eilgang längs + quer / rapid feed x/y 5 m/min. Eilgang senkrecht / rapid feed z 4 m/min. Antriebsleistung gesamt / drice capacity 7 kW Gewicht ca. / weight ca. 2000 kg Technische Daten, Zubehör und Beschreibung der Maschine sind unverbindlich - Technical data, accessories and description of the machine are not binding.

Condition: like new (used), Year of construction: 2010, The machine comes from the Daimler Benz technical center and has 150 operating hours. X 650 mm Y 500 mm Z 450 mm Table size 1,100 x 600 mm Table load 450 kg Spindle speed range 6,500 rpm Spindle taper SK 40 Tool changer 24 positions Control system Siemens 840 D Total power 20 kW Machine weight 5,500 kg Bm9zrnafs87 Space requirement (W x D x H) 2.3 x 3.1 x 2.3 m Hjdjtdfbmopfx Am Tsr Condition: very good

Condition: excellent (used), Year of construction: 1999, x-travel 400 mm y-travel 320 mm z-travel 400 mm Control HEIDENHAIN TNC 410 spindle turning speed - stepless 0 - 4000 U/min quill stroke 60 mm tool taper SK 40 table surface area 650 x 350 mm total power requirement 6,5 kW weight of the machine ca. 1,8 t dimensions of the machine ca. 2,5 x 1,8 x 2,0 m Electric handwheel HR 410 Hodpfx Amount Ihs Tsr Probe MP 11, automatic tool measurement TT 120 Cabin, tool holders,...

Condition: excellent (used), Year of construction: 2009, operating hours: 2,542 h, functionality: fully functional, Kunzmann WF 4/3 Milling Machine TNC 320 Manufacturer: Kunzmann Model: WF 4/3 Milling Machine Year of manufacture: 2009 Hjdpfoy S E Ahsx Am Ter Condition: Used, from training workshop, cleaned, powered on, ready for demonstration Spindle hours: 2,542 h X travel: 400 mm Y travel: 350 mm Z travel: 400 mm Tool holder: SK 40 Spindle speeds: 1,000 – 4,500 rpm Feeds: 0 – 2,000 mm/min Quill stroke: 60.0 mm Table size: 650 x 350 mm T-slots: 14 H7 Control: TNC 320 Motor power: 5.5 kW Weight: 1,920 kg Space requirement: approx. 2,000 x 2,000 x 2,100 mm Total connected load: approx. 7 kVA Central lubrication Coolant system CE compliant Scope of delivery: – Technical documentation – Full safety enclosure – LED machine lamp

Condition: good (used), Year of construction: 2001, functionality: fully functional, Kunzmann WF 7 CNC milling machine TNC 410 control Manufacturer: Kunzmann Type: WF 7 Year of manufacture: 2001 Hedpfx Amoy S E Abe Tsr Condition: used, under power Control: Heidenhain TNC 410 X-path 610 Y-path 400 Z-path 400 SK 40 housing Speed 1-5000rpm Tilt/swivel table Scope of delivery: - Underlays - Various tool holders

Condition: excellent (used), Year of construction: 2009, operating hours: 12,959 h, functionality: fully functional, travel distance X-axis: 650 mm, travel distance Y-axis: 500 mm, travel distance Z-axis: 450 mm, spindle speed (max.): 12,000 rpm, total height: 2,450 mm, total width: 2,400 mm, total length: 3,100 mm, table width: 630 mm, table length: 630 mm, table load: 350 kg, overall weight: 6,800 kg, Kunzmann WF 650 5-Axis Simultaneous Machining Center (2009) Manufacturer: Kunzmann Type: WF 650 5-Axis Simultaneous Machining Center Year of manufacture: 2007 Commissioned: 2009 Condition: Used, very good Machine ON: 46,181 h Spindle hours: 12,959 h Control: Heidenhain iTNC 530 Software Package 1 for iTNC 530 X-axis 650 mm Y-axis 500 mm Z-axis 450 mm Vertical milling head tilting range: -5° + 95° Hjdey S Ez Rjpfx Am Ter NC built-in rotary table Ø 630 mm Table load: 350 kg Spindle speed: 12,000 rpm Tool holder: SK40 Tool changer with 20 spindles Tools Internal coolant supply: Tool clamp with coolant supply and blow-out device through the spindle. Flow rate 25 l/min at 40 bar Optional water/air through the spindle Paper belt filter Controlled CNC milling head (B-axis) Mounting kit for TS 640 probe head 3D probe with infrared transmission Dimensions LxWxH approx.: 3.1 x 2.4 x 2.45 m Weight approx. 6,800 kg Coolant system LxWxH approx.: 1.6 x 2.00 x 0.50 m Scope of delivery: – Documentation – Machine feet – Machine light

Condition: ready for operation (used), Year of construction: 2005, Make: KUNZMANN Type of machine: WF 650 Year of manufacture: 2005 Control system: HEIDENHAIN iTNC 530 Machine's weight: 4.000 kg Tool holder: SK40 x-travel: 650 mm Hsdpjzawibefx Am Ter y-travel: 500 mm z-travel: 450 mm Speed range: 10.000 U/min max. Table load: 350 kg Overall dimensions: 3,0 x 2,5 x 2,6 m Table dimensions: 900 x 500 mm

Condition: reconditioned (used), Year of construction: 2002, Universal tool milling machine Make: KUNZMANN Model: WF 4/3 Year of manufacture: 2002 - partially overhauled, newly painted, RAL7035 light gray / RAL3027 raspberry red RAL7016 anthracite gray Mach. no.: 344025 with guarantee geometric acceptance with test report Hjdpfjm Nbwtox Am Ter Accessories: - HEIDENHAIN TNC 124 path control - HEIDENHAIN HR 410 electronic handwheel - HEIDENHAIN KT 130 electronic 3D touch probe system for recording the workpiece position for determining workpiece reference points for measuring a finished part incl. Weldon chuck SK40/Ø 16 mm - universal table 650 x 395 mm (T-slot: 14 mm) can be swiveled around 3 axes can be rotated 360° (as 4th axis digital displayed in the control) pivotable +/- 30° tilting range towards the machine 45° tilting range away from the machine 15° centering hole Ø 32 mm table load 150 kg - vertical milling head SK 40 with hydraulic tightening system DIN 69872 - central lubrication, electric - coolant system - splash guard cabin, travelling, electrically secured - operating instructions used as seen The machine is technically corresponding to the state of the year it was built.

Condition: reconditioned (used), Year of construction: 2011, Universal tool milling machine Make: KUNZMANN Model: WF 400 MC Year of manufacture: 2011 - partially overhauled, newly painted, RAL7035 light gray / RAL3027 raspberry red RAL7016 anthracite gray Mach. no.: 410016 with guarantee geometric acceptance with test report Hedpfx Ajvdrx Ujm Tor Accessories: - HEIDENHAIN TNC 320 contouring control - HEIDENHAIN HR 410 electronic handwheel - attachment kit for TS 220 probe head with taper on the control panel and spindle lock - fixed table 650 x 375 (T-slot: 14 mm) - vertical milling head SK 40 with hydraulic tightening system DIN 69872 - central lubrication, electric - coolant system - splash guard cabin, travelling, electrically secured - rope left window of the spike protection cabin removable, electrically secured - control panel on the substructure - operating instructions used as seen The machine corresponds technically to the standard of the year of manufacture.

Condition: reconditioned (used), Year of construction: 2008, Universal tool milling machine Manufacturer: KUNZMANN Model: WF 4/3 Year of manufacture: 2008 - partially overhauled, newly painted, RAL 7035 light gray / RAL 3027 raspberry red Machine no.: 344349 Warranty: 6 months Geometric acceptance with test report Accessories: - HEIDENHAIN TNC 124 linear control system - HEIDENHAIN HR 410 electronic handwheel - Fixed table 650 x 350 (T-slot: 14 mm) - Vertical milling head SK 40 with hydraulic clamping system DIN 69872 Hedpjhikrrjfx Am Tor - Central lubrication, electric - Coolant system - Chip tray - Operating manual - used, as is -