Used Nakamura As 200 for sale (49)

Condition: used, TECHNICAL DETAILS - Number of axes : 4 MAIN SPINDLE - Spindle nose : A2-6" - Spindle power : 11/15 [kW] - Torque : 51/110 [Nm] - Spindle speeds : 4500 [rpm] - Max. bar diameter : 66 [mm] - Max. turning diameter : 340 [mm] - Max. diameter on bench : 400 [mm] - Max. chuck diameter : 190 [mm] - C axis indexing precision : 0.001 [°] TURRET - Number of positions : 12 - Number of motorized positions : 12 - X/Z stroke : 227.5 [mm] - Y stroke : +/- 41 [mm] - Live tools speed : 6000 [rpm] - Live tools power : 3.7/5.5 [kW] POWER SUPPLY - Supply voltage : 400 [V] - Total installed power : 21 [kW] WEIGHT & DIMENSIONS - Machine floor space : 2000 X 1600 [mm] - Machine height : 1850 [mm] - Machine weight : 4300 [kg] EQUIPMENT - CNC : Fanuc - Interface : Ethernet / RS232 / USB / PCMCIA - Coolant tank - Chips conveyor - Oil mist extractor : DONALDSON Hedpfxovzt Hbj Aa Usi - Tool probe - Parts catcher - Parts conveying strip - Fire extinguisher * : SIEMENS * NB : working order not guaranteed. To have it checked by a qualified organization of the buyer. - Number of turning tool holders : 2 - Number of fixed tool holders : 4 - Collet chuck : EROWA

Condition: used, TECHNICAL DETAILS - Number of axes : 4 MAIN SPINDLE - Spindle nose : A2-6" - Spindle power : 11/15 [kW] - Torque : 218/258 [Nm] - Spindle speeds : 4500 [rpm] - Max. bar diameter : 66 [mm] - Max. turning diameter : 340 [mm] - Max. diameter on bench : 400 [mm] - Max. chuck diameter : 190 [mm] - C axis indexing precision : 0.001 [°] TURRET - Number of positions : 12 - Number of motorized positions : 12 - X/Z stroke : 227.5 [mm] - Y stroke : +/- 41 [mm] - Live tools speed : 6000 [rpm] - Live tools power : 3.7/5.5 [kW] POWER SUPPLY Hodpju Uu R Nofx Aa Usi - Supply voltage : 400 [V] - Total installed power : 21 [kW] WEIGHT & DIMENSIONS - Machine floor space : 2000 X 1600 [mm] - Machine height : 1850 [mm] - Machine weight : 4800 [kg] MACHINE HOURS - Number of hours under power : 69240 [h] EQUIPMENT - CNC : Fanuc - Interface : Ethernet / RS232 / USB / PCMCIA - Coolant tank - Chips conveyor - Oil mist extractor : DONALDSON - Tool probe - Parts catcher - Fire extinguisher * : SIEMENS * NB : working order not guaranteed. To have it checked by a qualified organization of the buyer. - Number of turning tool holders : 1 - Number of fixed tool holders : 4 - Collet chuck : EROWA

Condition: ready for operation (used), Year of construction: 2001, functionality: fully functional, turning length: 555 mm, travel distance X-axis: 195 mm, travel distance Y-axis: 82 mm, travel distance Z-axis: 600 mm, workpiece diameter (max.): 250 mm, TECHNICAL DETAILS Counter-spindle speed: 59–4,500 rpm Bar capacity main spindle: 65 mm Bar capacity counter-spindle: 51 mm Travel X1/X2 axis: 195 mm Travel Y axis: ± 41 mm Travel Z axis: 600 mm Max. workpiece diameter: 250 mm Max. turning length: 555 mm Number of tool stations upper turret: 12 Number of tool stations lower turret: 12 All tools driven Main spindle nose: A 2-6 Counter-spindle nose: A 2-5 Hodsynhihopfx Aa Uji Feed power X1/X2/Y axis: 1 kW Feed power Z1/Z2 axis: 2.1 kW Maximum loading length: 6,200 mm MACHINE DETAILS Control model: Fanuc 18 IT Main spindle power: 18.5 kW / 15 kW Counter-spindle power: 11 kW / 7.5 kW Bar feeder Max. bar length: 6 m 8 channels with diameters: 22 mm, 27 mm, 32 mm, 37 mm, 42 mm, 47 mm, 57 mm, 67 mm 8 pushers with pusher cone Intermediate sizes can also be loaded Unload magazine Max. bar length: 2 m EQUIPMENT Coolant tank Chip conveyor from 10/2021 Last overhaul of bar feeder 09/2020 (channel replacement, replacement of various bearings, replacement of push rods and spindle liners, including maintenance)

Condition: good (used), functionality: fully functional, turning length: 350 mm, turning diameter: 220 mm, spindle bore: 50 mm, Nakamura Tome CNC Lathe Model: TMC 20 Hodpfx Aaoygkzdo Uji Control: Fanuc OTC Capacity: 220 x 350mm With: 200mm 3 Jaw Power Chuck Spindle Bore 50mm

Year of construction: 2006, condition: excellent (used), Turning capacity: Max. turning diameter: 190 mm – 200 mm Max. turning length: 620 mm – 780 mm Bar capacity: 51 mm / 65 mm Spindles (main & sub-spindle): Spindle speed: 4,500 – 6,000 rpm Drive power (main spindle): 15/11 kW Spindle nose: A2-5 / A2-6 Turret & axes: Number of turrets: 2 (upper turret with B-axis, lower turret) B-axis swivel range: (or approx. total) Y-axis (stroke): (total) Number of axes: total 9 Dimensions & Weight: Footprint: approx. (width x depth) Hjdpfx Aaeymqx No Uji Machine weight: approx. 12,500 kg – 13,500 kg

Year of construction: 2011, condition: excellent (used), 2 units Technical Data (Overview): Bar capacity: 42 mm Max. turning diameter: approx. 190 mm Max. turning length: approx. 500 mm Spindle speed (main & sub-spindle): 6,000 rpm Hedpfeymqxiox Aa Uji Spindle motor power: 11/7.5 kW Turret: 2x 12 stations (often driven) Y-axis: Upper, mm Control: Fanuc 31i/T (or NT SmartX) Machine weight: approx. 5,650 kg

Condition: ready for operation (used), Year of construction: 2017, operating hours: 24,140 h, overall weight: 10,000 kg, controller manufacturer: FANUC, controller model: 31i-NT-SmartX, number of axes: 9, This 9-axis Nakamura NTJ100 turn-mill centre was manufactured in 2017, featuring a bar capacity up to 65 mm and dual spindles with maximum speeds of 4500 and 5000 rpm respectively. It includes a Samsys bar loader, Absolent extraction system, and a variety of automated features such as coolant supply through the spindle, parts catcher, and automatic tool setting devices. Consider the opportunity to buy this Nakamura NTJ100 turn-mill centre. Contact us for more information about this machine. • Increased bar capacity: 65 mm left, 51 mm right • Workpiece measurement: han-bei measuring probe for automatic workpiece measurement (infrared or radio type) for left and right spindle • Left + right, with auto swing-in type and 2x 4 measuring directions for quick and precise tool setting via the nc function. • Operating time 43399h • Coolant system: coolant through spindle (CTS); coolant float switch for machine stop on low level; additional coolant flushing via the spindle (left and right) • Bar capacity: Ø 51 mm • Parts catcher type A with collecting tray, max. Ø 65 x 150 mm, 3.0 kg, spindle side, left, with plastic lining • Chuck blow-out device for left spindle • Automatic power shut-off • Preparation for oil mist extraction system with connection nozzle Ø 150 mm • Robot/automation prep: pneumatic flap for robot handling on top of the door, opening approx. 400 x 400 mm • Handwheel for manual tracking of defined contours • Data server with 1 GB ATA memory card • Interface for KNOLL system • Triple signal lightSamsys bar loader with a 1.5 m bar loading capacity has the following dimensions: Length: 225 cm + 43 cm intermediate guide Width: 120 cm (including loading ramp and control panel) Height: 145 cm or 180 cm with the flap openThe machine was mainly used to process aluminium (95%). Additional equipment • Samsys bar loader, including extension Hjdpfxjx D Iuzj Aa Uji • Absolent extraction system • Slat-belt chip conveyor with interface, time-interval control, and alarm evaluation

Condition: used, Year of construction: 2008, functionality: fully functional, Turning / milling center with counter spindle with 10 CNC axes (X1, X2, Z1, Z2, Y1, Y2, B1, B2, C1, C2) Control: FANUC 31:iA Main Spindle Power: 15/11 kW bar material dia.: 51 mm spindle revolution: 5.000 min-1 Counter Spindle Power: 11/7,5 kW Hsdpsynk Tcsfx Aa Uoi bar material dia.: 51 mm spindle revolution: 5.000 min-1 Turning and milling spindle Power: 7,5/3,7 kW Turning and milling spindle speed: 12.000 min-1 max. rotation length turret bottom: 1.005 mm Slide cross X1 / X2 / Z1 / Z2 / B2: 455 / 222,5 /1.090 / 1.005 / 1.008 mm Slide cross Y1 / Y2: +/- 70 / +20, -50 mm Swivel range B1 axis: +/- 95 ° Linear rack magazine incl. support robot CNC support steady rest Coolant cyclone filter system incl. 2 pcs. coolant pumping spindle oil cooler

Condition: like new (used), Year of construction: 2006, spindle motor power: 15 W, travel distance X-axis: 177 mm, travel distance Y-axis: 41 mm, travel distance Z-axis: 550 mm, rotational speed (min.): 5,000 rpm, total height: 2,065 mm, total length: 4,390 mm, total width: 1,741 mm, overall weight: 5,000 kg, CNC controller: Nakamura-Tome FANUC Capacity X-axis travel mm: 177,5 Y-axis travel mm: ± 41 Z-axis travel mm: 550 B-axis travel mm: 689 C-axis: 360º (0,001º) Hedox Dbxgjpfx Aa Uei Turning length mm: 500 Max. turning diameter mm: ø: 190 Distance between spindle centers mm: 780 Bar work capacity mm: 51 Upper turret Tool holder: VDI-30 Number of tool slots St .: 12 Speed driven tools RPM: 3.600 Drive power driven tools kW: 5.5 / 3.7 Main spindle Speed spindle rpm: 5.000 Drive power spindle kW: 15 / 11 Maximun torque Nm: 47,2 Counter spindle Speed spindle rpm: 5.000 Drive power spindle kW: 11 Equipment Chip conveyor Part catcher Bar Loader RBK 10016 Milling function Working time hours Potencial nominal kVA: 31,43 Basic machine dimensions / weight Length mm: 4.390 Width mm: 1.741 Height mm: 2.065 Weight kg: 5.000

Condition: good (used), Year of construction: 2011, functionality: fully functional, number of driven tool stations in tool turret 1: 48, number of driven tool stations in tool turret 2: 12, Available immediately and can be viewed under power. Upper X Y Z ballscrews fully refurbished mid 2023 by UK company. Included as shown in pictures -- Live tooling turret NA44A/BMT44 -- Capto C4 milling -- Capto C4 turning holders -- Capto C4 extensions -- 3 x Dual Capto C4 for turret -- Various other turret holders as pictured -- See attached spreadsheet (PDF below), for included holders. -- Renishaw arm -- Part catcher arm + converyor (not used for a long time) -- Old version of CAMplete TurnMill with USB dongle TECHNICAL DETAILS - Number of axes : 9 - Number of spindles : 2 MAIN SPINDLE - Spindle nose : A2-5 - Spindle power : 11 [kW] - Spindle speeds : 4500 [rpm] - Max. bar diameter : 65 [mm] - Max. turning diameter : 200 [mm] - C axis indexing precision : 0,001 [°] COUNTER-SPINDLE - Spindle nose : A2-5 - Spindle power : 11 [kW] - Spindle speeds : 5000 [rpm] - Max. bar diameter : 51 [mm] - Max. turning diameter : 200 [mm] Hodpeycl Epsfx Aa Uei - C axis indexing precision : 0,001 [°] - Travel : 780 [mm] - Spindle / counter-spindle distance : 980 [mm] TURNING-MILLING SPINDLE - X/Z stroke : 570/1297 [mm] - Y stroke : +/- 100 [mm] - B Axis stroke : 190 (+/-95) [°] - Tool type : Capto C4 - Spindle speeds : 12000 [rpm] - Spindle power : 7,5 [kW]

Condition: excellent (used), Year of construction: 2020, Sub-spindle, Y-axis, C-axis FANUC 31i B5-NT-SmartX control Turning diameter max 305mm Turning length -870 mm Main-spindle speeds 6'000 rpm Sub-spindle speeds 6'000 rpm Milling head B-axis +/- 95 ° Tool changer with 72 positions Turret head: 24 positions with 12 driven positions Tool presetting device Workpiece pick-up attachement Tool breakage control device Bar loader Misc. accessories MARCELS MASCHINEN CH Hedpfeyla Spjx Aa Usi

Condition: excellent (used), Year of construction: 2019, functionality: fully functional, The machine is currently operating in an Italian high-end facility specializing in individual components and custom manufacturing for Formula 1 as well as the aerospace sector. The machine is in exceptional condition. Photos are available upon individual request and under strict confidentiality. CNC turning/milling center (multitasking) with full 5-axis simultaneous machining - 2 turning spindles (main spindle + sub spindle) - B-axis milling head (swivelling milling head) + C-axes on both turning spindles - Designed for complete machining (turning + milling + drilling + threading + contouring) Working area / capacities: - Max. turning diameter: 640 mm - Max. turning length: 1,100 mm Hodpfeynmgljx Aa Usi - Distance between spindle noses (min./max.): 250 / 1,350 mm - Distance between centers (min./max.): 125 / 1,225 mm - Bar capacity / spindle bore: 71 mm - Chuck diameter (typical for A2-8 configuration): 254 mm (10") Main spindle (left): - Spindle nose: A2-8 - Bar capacity: 71 mm - Speed range: stepless up to 4,500 rpm - Spindle power (depending on spindle package): approx. 22/18.5 kW (alternatively 15/11 kW available depending on package) Sub spindle (right): - Design: fully-fledged sub spindle (workpiece transfer/complete machining) - C-axis available (for milling/indexing operations) - Clamping device: hydraulic chuck (compatible with A2-8 configuration, typically 10") Milling unit / 5-axis kinematics: - B-axis swivel range: 225° (−120° / +105°) - Y-axis: ±125 mm (250 mm total) - X/Y “square stroke” / machining window: 250 mm × 250 mm - X-axis undercut below spindle center: 125 mm (for extended machining range) - C-axis on main and sub spindle (C1/C2) Tool / milling spindle (typical version): - Milling spindle in B-head for drilling/milling/threading/simultaneous machining - Speed (depending on package): approx. 8,000 rpm (higher speeds optionally available) - Power (depending on package): typically up to 18.5 kW (package dependent) Tool handling: - Automatic tool magazine (ATC): 120 positions - Automatic tool changer (magazine/ATC) Control / software: - Nakamura NT-Smart X user interface / process management - 5-axis capable CNC platform (CAM-compatible complete machining, simultaneous machining) Typical applications and process capability (for your listing): - Complete “done-in-one” machining: turning + milling + drilling + threading + 5-axis contours

Condition: used, Year of construction: 1992, serial number 31302 control Fanuc Hodpshn T D Iofx Aa Uoi with double spindles x turning diameter max. 600 mm x-travel 1000 mm with magazine x extensive accessories ca. 100 Aufnahmen, auch angetrieben weight of the machine ca. 13 t +++++ Please note: The machine is dismantled and ready for loading. It is not possible to show it under power or make a video. Our offer includes already the best pictures. So we don’t have and won’t send additional pictures. +++++

Condition: ready for operation (used), Year of construction: 2023, number of axes: 9, This 9-axis NAKAMURA-TOME WY150 was manufactured in 2023, featuring a turn-mill centre with a comprehensive toolholder setup including 6 external, 4 internal, 3 radial rotating, and 12 axial rotating holders, plus a collet chuck and a 3-jaw chuck. Consider the opportunity to buy this NAKAMURA-TOME WY150 turn-mill centre. Contact us for more information. Additional equipment • 6 external toolholders • 4 internal toolholders Hjdpsyb Sakofx Aa Uoi • 3 radial rotating (driven) toolholders • 12 axial rotating (driven) toolholders • 1 collet chuck • 1 three-jaw chuck

Condition: excellent (used), Year of construction: 2015, Maximum cutting diameter 640mm, maximum cutting length 1100mm, bar capacity 80mm, B axis -120/+105 degrees, Hodpfx Astt Nrtea Uoi C axis 0.001 degrees, Spindle power 18.5Kw, spindle speed 3,500 rpm, milling power 15Kw, milling speed 12,000 rpm, sub spindle speed 3,500 rpm, 40 station ATC, Y axis travel -/+ 125mm, Fanuc 31i control, magazine barfeed, swarf conveyor, parts catcher.

Condition: ready for operation (used), Year of construction: 2000, spindle speed (max.): 3,500 rpm, travel distance X-axis: 400 mm, travel distance Z-axis: 1,550 mm, total height: 3,200 mm, overall weight: 22,000 kg, controller manufacturer: FANUC, controller model: 16i-TA, number of axes: 9, This 9-axis Nakamura-Tome STW-40 was manufactured in 2000, featuring a max. turning diameter of 570 mm and a turning length up to 1550 mm. It boasts spindle speeds up to 3500 rpm and rapid traverse rates of 25 m/min on X-axes and 30 m/min on Z-axes. Ideal for complex machining tasks, it includes a 80-fold WZG magazine and a hinged belt chip conveyor. Contact us for more information about this machine. Additional equipment • 12000 rpm for upper WZG spindle with 11/7.5 kW drive power and 79/47 Nm torque • 80-fold WZG magazine • Automatic start-up and shut-down of the machine with warm-up program function • WZG breakage control with scanning flag for upper WZG spindle • 2 HD - Brinkmann pumps for upper WZG spindle and lower turret (pump capacity = 45 liters per minute) • Hinged belt chip conveyor with ejection to the right Machine Benefits Technical Machine Benefits • Max turning diameter upper wzg spindle: 570 mm // max turning diameter turret lower left and right: 400 mm • Standard turning diameter: 300 mm Hjdsyaqpuspfx Aa Uoi • Max turning length turret-bottom left and right: 500 mm • Max turning length upper wzg spindle: 1550 mm • Distance between spindle noses: 1900 mm • Distance between 2 3-jaw chucks: 1500 mm • Power requirement: total connected load of 160 kva • Air consumption: approximately 500 liters per minute • C1 + c2: 400 rpm • B-axis: 12. 5 r/min Extra Information Left / Right spindle: Driving power and torque: 22/15 kW Torque: 500/794 Nm Spindle speed: 30-3500 rpm Spindle nose: A1-8 Inside diameter in front bearing: 130 mm Spindle bore: 85 mm Max bar capacity: 71 mm Max chuck size: 315 mm C - Axis 3 axes simultaneous: X, Z, C Switch-on time: 0.5 sec Rapid traverse speed: 400 rpm (144000 °/min) Feed rate: 1 - 4800 °/min Graduation accuracy: 0.011° (30 angular sec) Repeatability: ± 0.006° (± 20 angular sec) Spindle disk brake torque: 25 kgfm Milling and Bphr drive for upper WZG spindle: CAPTO-C6 Drive power: 15/11 kW from 800 rpm Motor speed: 60 to 6000 rpm Torque: WeldonS, 10, 12, 14, 16, 20, 25 Clamping fixtures attached tools: ER-25/ER-32 collet chuck Dimensions Machine Depth 6200 mm

Condition: used, Year of construction: 2011, turning diameter: 170 mm, spindle bore: 42 mm, CNC Lathe with 2nd Spindle, 2 turrets and Y-axis (7-axis) Hsdpfx Aajx N S Hzo Uji Control: Fanuc 31i-A Turning diameter: 170 mm Turning length: 503 mm Spindlebore diameter: 42 mm Spindle Nose: A2-5 Spindle nose sub-spindle: A2-5 Spindle (left) speed 6.000 1/min Spindle (right) speed 6.000 1/min Movement X-axis: X1: 135 / X2: 135 mm Movement Y-axis: +/- 31 mm Movement Z-axis: Z1: 503 / Z2: 503 mm Min indexing C-axis right spindle 0,001 ° Min indexing C-axis left spindle 0,001 ° Number of tools on turret 2x12 Tool Type: BMT 44 Bar Feeder: Iemca Boss 525E (Year 2011) Machine weight: 5,650 kg. If you have any questions concerning the machine, please do not hesitate to contact us by phone or e-mail. Feel free to view our other advertisements for a complete overview of our stock.

Condition: ready for operation (used), Year of construction: 1988, controller manufacturer: FANUC, number of axes: 2, This NAKAMURA TMC-15 was manufactured in 1988. It's a horizontal turning machine featuring a hollow of 34 mm. If you are looking to get high-quality turning capabilities, consider the NAKAMURA TMC-15 machine we have for sale. Contact us for more information. Machine Benefits Technical Machine Benefits Hedpfoyaim Sex Aa Usi • Hollow: 34 mm Extra Information Machine still under power

Condition: excellent (used), Year of construction: 2018, Sub-spindle, Y-axis, C-axis FANUC 31i B-NT-SmartX control Turning diameter max 225 mm Turning length -656 mm Hodpfovwkirsx Aa Uei Chuck Diameter -210 mm Main-spindle speeds 4'500 rpm Sub-spindle speeds 6'000 rpm Turret head 1+2: 24 positions with 12 driven positions each Robot for workpiece loading Tool presetting device Misc. accessories MARCELS MASCHINEN CH

Condition: new, Year of construction: 2022, functionality: fully functional, The tool holder is completely new and still in its original packaging. There is a second one, which is used but shows no signs of wear. (see picture) Spindle MTSK-40 Gear ratio 1:1 Max rpm. 6000 Maximum torque [Nm] 50 External cooling Yes Internal cooling Yes Internal cooling P=30 BAR Hsdpjuzwutjfx Aa Uoi The holder can also be used for the following CMZ machines. CMZ - TA15M/Y/MS/MY/YS 15 PCS. CMZ - TX52 Y2 QUATTRO CMZ - TX52 Y2 TWIN CMZ - TX66 Y2 QUATTRO CMZ - TX66 Y2 TWIN CMZ - TX66 Y3 CMZ - TA20M/Y/MS/MY/YS 15 PCS. CMZ - TA25M/Y/MS/MY/YS 15 PCS. CMZ - TA30M/Y/MS/MY/YS 15 PCS. CMZ - TTL 52 CMZ - TTL 66 CMZ - TX52 Y3

Condition: used, Year of construction: 2003, NAKAMURA TOME SUPER NTJ CNC LATHE MAKE NAKAMURA TOME, MADE IN JAPAN MODEL SUPER NTJ YEAR 2003 CONTROL FANUC 18 iT B CHUCK SIZE 210.0 mm MAX TURNING DIA. 200.0 mm BETWEEN CENTRES 780.0 mm DRAW TUBE DIA. 80.0 mm TRAVELS: X AXIS: 750.0 mm Z AXIS: 130.0 mm TURRET 2 x 12 STATIONS SPINDLE SPEED Up to 5,000 rpm SPINDLE BORE 65.00 mm SPINDLE NOSE A2-6 PLUS CNC SHORT MAGAZINE BARFEED TURRET TOOLING SWARF CONVEYOR Hedpsv I Tx Refx Aa Uji MANUALS

Condition: excellent (used), The machine is in very good condition and has low operating hours. Hodoydvi Iopfx Aa Usi

Condition: used, Year of construction: 2003, turning diameter 190 mm turning length 620 mm Hodpfx Aexiy Auea Uoi control Fanuc Series 18i-TB total power requirement 15 kW weight of the machine ca. 13,5 t dimensions of the machine ca. 5350X3350x2395 m

Condition: ready for operation (used), Year of construction: 1987, turning length: 260 mm, turning diameter: 180 mm, Fanuc OT 10-position turret Hedpsx Ikunefx Aa Uji maximum spindle speed 4500 rpm weight 2300 kg

Condition: ready for operation (used), Year of construction: 2022, spindle motor power: 5,500 W, spindle speed (max.): 6,000 rpm, total height: 1,858 mm, product length (max.): 3,675 mm, number of axes: 7, General Data Measurements height 1858 mm Dimensions Machine Length 3675 mm Main Drive Number of axis 7 Spindle Speed 6000 RPM Spindle motor power 5.5 kW Technical Specification Driven Tools yes Hedpfx Aox Ixigea Uji This 7-axis NAKAMURA Tome WT150 II was manufactured in 2020, featuring dual 12-tool turrets and motorized positions for enhanced flexibility. It includes a high-pressure coolant pump and a bar feeder interface with an LNS Quick Load Servo 80 S2. Ideal for complex turn-mill operations, consider the opportunity to buy this NAKAMURA Tome WT150 II turn-mill centre. Contact us for more information about this machine. Application Types Turning