aoki japan used for sale

AOKI SBIII-350LL-40 injection stretch blow molding machine -Manufactured year : 2005 -Location : Korea

AOKI One step PET injection stretch blow molding machines for jar

AOKI SBIII-1000H-60 year `2014 for 18~25liter bottle

The machine is almost brand new. It was produced in 2021 February and installed in 2021 July it includes : - AL-250-50S ISBM machine - Mitsubishi RV-3SB , 5 axes take out robot with complete cell / conveyor , controller and teaching pendant - Wittmann Dry MAX E60 PET dryer (2013) The machine has the following extra options: - EN (European Norm compatibility) specification (value: JPY2,500,000) All the other options: (value: JPY960,000) -Blow clamping short stroke - blow core short stroke - Lip cooling circuit - blow & bottom mold chiller cooling, The machine will be in production until 2023 January. It is possible to see in running.

Nakata Zoki Kobe, Japan (Troester design) Duplex Extruder Unit Dual 150mm dia PIN Type Extruders, Year of manufacture: 1990, with Roller Feed, and duplex Die. L/D ratio 16:1 Number of Pins: 10 Rows x 8 Pieces, Spare Pins included. Screw Speed 45 r.p.m. Motors 185kw D.C. variable speed, 415 volt, 3ph, 50hz. Full Books and Drawings available. Thyristor Drives included. Starter and Control Panel for Lower Extruder only. Die usable Width 18\\, In good condition.

more tech. Details on request

FOR SALE COMPLETE T/C IHI-BBC VTR 454-32 FOR SALE COMPLETE T/C IHI BBC VTR 454-32 TO WHOM IT MAY CONCERN; WE VE USED COMPLETE IHI BBC VTR 454-32 AT OUR STOCK . PLS FIND SPECIFICATION T/ C AT BELOW. IHI BBC TYPE VTR 454-32 no xi 145203 N mmax 580C t mmax 290 revolutİon 17400RPM 01 1 17 01 2 04 1 13 12 1 10 03 1 16 14 1 00 01 1 00 16 MADE IN JAPAN TURBO CHARGER IS READY TO LOAD ON TRUCK . IZMIR /TURKEY EX STOCK IF YOU VE ANY QUESTIONS PLS DO NOT HESITATE TO CONTACT WITH US. Capt. Ayhan Ugurluba Best of regards; Aliaga marine services E mail: info@aliagamarine.com PHN/fax: +90 232 618 03 85 Mobile: + 905556084850 ABC.aliagamarine.com TURKEY

Qty. 1 Second-hand foil rolling mill plant Mfc.: World Co. (Japan) Type: 6-Hi – Non reversing mill Built: 2002 Application: Copper foil Width: 400 – 700 mm Coil weight: Max. 5 Ton Thickness Entry: 100 – 200 microns Exit: 5 – 100 microns Speed: 0-400/800 m/min. Thickness X-Ray unit AGC system Variable Crown Control Hydraulic servo equipment Main motor power: 200 kW DC Slitter line Mfc.: IHI Width: 150-700 mm Thickness 5 – 50 microns Degreasing line Mfc.: World Co. Strip width: 700 mm Thickness: 10-50 µm Treatment line Mfc.: Kawasaki Built: 2005 Width: 700 mm Thickness: 10-50 µm

CHIRON MODEL FZ18W MAGNUM 4 axisVertical machining center with rotopallet and double 4th axis20 TOOLSISO 40Toolchange: 2.1 sec Spindle: 20 - 8000 RPM, 18,5k kWX = 625Y = 400Z = 400Rapids 40m/minTable area: 2 x 900 x 470- TSUDAKOMA heavy duty double 4th axis (Japan) 360.000 pos.- original HAWE hydraulic unit - FANUC 0m be inspected under power in our warehouse.Mimu Machine tools Italy

Qty. 1 Second-hand taper pole pipe production line We have following taper pole pipe production line for sale Mfc.: CMF, Delem, Merkel, Bosch, Nachi, YSD, ESAB, (France, Korean, Japan and Chinese Manufacturer) Built: 2006 Stopped: 2012 3. Product Capacity: Profile 5,000 ton/year / Round pipes 10,000 ton/year i. (Capacity : Profile 6.9 pcs/Hr, Round 3.6 pcs/Hr) Price: Please provide us with your offer! (Further information can be submitted on request!) Production Description Size for Product Pole or Pipe type Conical Pole PolygonalPole Round Pipe Thickness mm 2.6,3.7,5.2,7.5 10 2.6,3.7,5.2,7.5 10~20 20~38 O.D mm ?190 ~ ?463 ?190 ~ ?820 22”~ 32” Length M 2.45 ~ 16.0 2.45 ~ 16.0 6.2 ~ 12.8 Rake About 0.43° About 0.43° Intensity Mpa T.S=510, Y.P=360 T.S=510, Y.P=360 T.S=650, Y.P= 50 ...

Fanuc 15 M control. 2x Pallets 1,600 x 1,800 mm. Pallet load 6 t. B-axis 0.001. X 3,300 mm. Y 1,800 mm. Z 1,300 mm W 700 mm. Eilgaenge X,Y,Z 10,000 mm/min. Drilling spindle diameter 130 mm. Spindle holder ISO 50. Spindle drive power 22/26 kW. Spindle speeds 5 - 2,500 rpm. tool changer. tool magazine positions 90 times. all-round cladding. ; Well

Qty. 1 Second-hand continuous galvanising line Mfc.: Koryo SanGi, WMS Co., Sumitomo, Dongyang GiGong, Myungshin Mach., Kanto TK, Hitachi, Yuyoung Industry, Cosmo Gas, Hankuk Yugong, Jungwon Mach., Bugong Ind., Hanhyung Industry, SeunJin Mach., Cheongsong Electrics, Jungbu Civil Gas, HK. ENG, Cosmo Construction, KyungJin Construction, Cheonsu Hwankyung Ind., Shinhyeung Built: 1983 Some revamp in 2005 Material: Cold Rolled mild steel FH Strip Width: 650 - 1.250 mm Thickness: 0.2 -1.6 mm Capacity: REF: 27 Ton / Zn 1.2 Ton = 1 Hour HMI Main Control Operation system Zn Coating Wf 80 gm – 220 gm (Both Side) Coil Out Diameter: 2.050 mm Line Speed Max: 150 m/min Entry Section: 195 m/min Process Section: Max. 150 m/min Exit Speed Max.: 195 m/min

Fanuc 15 M Control. 2x Pallets 1600 x 1800 mm. Pallet load max. 6t. B-Axis 0.001°. X 3300 mm. Y 1800 mm. Z 1300 mm. W 700 mm. Rapids to 10000 mm/min. Boring spindle diameter 130 mm. Spindle taper ISO 50. Spindle drive motor rating 22/26 KW. Spindle speeds 5 - 2500 rpm. Tool changer. 90 station tool magazine. Chip and splash guarding. ; Good

MORI SEIKI SH-500/40 Horizontal Machining Center was built in Japan in 1999 by MORI SEIKI CO., LTD. The machine is equipped with a numerical control type MORI SEIKI MSC-502. The milling machine has a table size of 500 x 500 mm and processes workpieces weighing up to 500 kg. The travel range of its X, Y, Z axes is 630 x 600 x 650 mm, respectively. The machine spindle rotates at 12,000 revolutions per minute. The milling machine is equipped with a magazine for forty tools with a maximum tool diameter of 150 mm, length 360 mm and a weight of 12 kg. The milling center is offered at a price with different types of holders. Technical parameters of the MORI SEIKI SH-500/40 CNC milling machine - CNC control: MORI SEIKI MSC-502 Travel range: - X axis (table travel length): 630 mm - Y axis (vertical movement of the spindle head): 600 mm - Z axis (cross table movement): 650 mm - distan ...

Cell with robot KAWASAKI RS005L A + band saw Year of construction / robot: 2010 Control: CNC 6-axis Max arm range: 903 mm Max load capacity: 5 kg Country of origin: Japan

Robot KAWASAKI MX 700 Year of construction: 2012 Control: CNC 6-axis Max arm range: 2 839 mm Max load: 700 kg Country of origin: Japan

GUK Slitting Machine RS 21/760 Technical details: -No double bows, false bows and no risk of mixing! -Insensitive to static charge -approx. 20% cost savings compared to processing batch goods -Automatic control of the cutting position -Synchronous control of the print mark -Installation of code readers additionally possible -Storage in maintenance-free needle and ball bearings -Paper roll on top, single or double roll stand -With and without integrated adhesive table -Drive left or right, with chain or timing belt -Smallest fold 15 mm -With automatic roller changer ARW 21 Specifications: -Min. format: (WxL) 60 mm x 105 mm -Format: (WxL) 210 mm x 315 mm -Roller outer diameter: max. 600 mm -Roll core diameter: Europe 70 mm USA and Japan 76 mm or 152.4 mm or 3 inch or 6 inch -Power: 300/minute, depending on section length -Capacity: For paper roll by. 600 mm, sectio ...

Pallet length: 400 mm Pallet width: 400 mm Longitudinal X: 560 mm Cross Y: 460 mm Vertical Z: 510 mm Number of pallets: 0   Positions ATC: 60   CNC Brand: Mazatrol MACH-id    6026 MAKE         Mazak Japan TYPE          H 400 YOP           1990 SPECIFICATIONS X - Travel        560 mm Y - Travel        460 mm Z - Travel         510 mm B-Axis indexing         360.000 ° Table Length             400 mm Table Width               400 mm Table load                   400 Kg Number of pallets       2 Feed rate X-Axis        &nbs ...

Qty. 1 Second-hand Duplex board paper mill Mfc.: Hasegawa, Yodogawa, Fuyo Japan, Valmet, Finland, Kumsun, Chung Korea Buil: 1984 Width: 3400 mm Speed: 330 m/min. Productivity: 450 ton/day max. 350 ton/day (average) GSM: Max.500 g/m2 -The number of HEAD BOX: 7 sets -Fourdriner type -Dryer: 77 ea (Air type+Electric type)

Stacking height: 50 mm Speed: 18 sec. Made in Japan

Turning diameter: 420 mm Turning length: 750 mm Turret positions: 10 CNC Brand: Mori Control CNC Model: Maps MACH-id      5025 MAKE           Mori Seiki Japan TYPE              NL 3000 MC / 750 YOP                 2007 SPECIFICATIONS Max. turning  Ø     420 mm X-Axis         280 mm Z-Axis          820 mm Spindle bore       105 mm Speedrange       3000 Rpm Spindle power        22 kW Subspindle speeds        5.5 Rpm ATC / revolver        10 Speed live tools         6000 Rpm Control         MAPS Chip conveyor  &nbs ...

Second-hand Hybrid forklifter LPG gas and petrol Loading capacity 3,000kg Engine K25 Japan Long forks 1.820mm lifting height 3,000mm solid tyres Colour red Including.: Duplex mast, side shifter, seat belt, rain cover, toolbox, manual

MAZAK CO2 Laser Cutting Machine STX510 MKIII 4kW -made in Japan- ! SOFORT EINSATZBEREIT ! over-recovered, very well-preserved MAZAK laser machine with 4000W Panel size: 3000mm x 1500mm minimum set-up area of 2.9m x 7.3m Puncture sensor Plasma sensor Burning Sensor automatic nozzle change Small parts conveyor belt Ball roller table Fast-punching fully encapsulated machine cover Cast bed, no foundation needed FE: up to 20mm VA: up to 15mm ALMG: up to 10mm Plastic, wood cutable incl. CAD / CAM Software 2020 Version incl. 12 months warranty (within Dtl.) incl. delivery incl. commissioning + training Testing under electricity ready for delivery immediately immediately ready for use =optional with fully automatic loading and unloading MAZAK CELL=

Hydraulic variable displacement pump KYB BO 200-1800 I HVFD-18A18-M S/N 320033 350 K Made in JAPAN single or completely with axle and cones gearbox SA P561 NQ 25 P 55 D About 1800 h, axle with 2 gears, integrated brakes as well as differential lock ------Jodau Environmental & Green Care Technology------- Used machinery for plant and sports field maintenance, garden & landscaping, cemetery & winter service, sweeping & disposal, environmental care, engines and more ...

Power: 12 t Thread diameter maximum: 50 mm Thread diameter minimum: 3 mm MACH-id   5405 MAKE       SENY - Japan TYPE         H-50-D YOP           90 er SPECIFICATIONS Miniumum pressure       0,5 T Maximum pressure         12,5 T Max. workpiece      50 Ø Min. workpiece        3 Ø Min. Threading lenght      130 mm Max. Threading length      170 mm Shaft Ø    54 mm Power      5 kW DIMENSIONS Length        1500 mm Width          1400 mm Height          1500 mm 1 set M4 x 0,7 x Ø 150 1 set M5 x 0,8 x Ø 150 1 set M6 x 1,0 x Ø 150 1 set M8 x 1,25 x Ø 150 1 set M8  ...

Cemax M2 Router X,Y,Z Working Area: 1300x2500x200mm X,Y,Z Traveling Positioning Accuracy: ±0.05mm X,Y,Z Repositioning Accuracy: ±0.05mm Table Surface: Vacuum table Max.Traveling speed: 60000mm/min Max. Working Speed: 25000mm/min X,Y axis transmission: Herion gear rack Z axis transmission: ball screw Reducer: Japan Xinbao reducer Spindle Power: Ronghua 6KW water cooling spindle Drive Motors: Leadshine 850W Servo motor Working Voltage: AC380V/50Hz/3PH Operating System: Ncstudio Control System

Turning diameter: 190 mm Turning length: 970 mm Turret positions: 12 Positions ATC: 0   Number controlled axis: 0   CNC Brand: Fanuc CNC Model: 18 iTB MACH-id    5186 MAKE         Nakamura Japan TYPE           Super NTJ YOP             2011 SPECIFICATIONS Max. turning diamter Ø    190 mm DBC Turning length        970 mm C-Axis       360.000 ° Spindle bore     65 mm Main Spindle speed      4500 Rpm ATC / revolver       12 Speed live tools     4500 Rpm Power live tools      15 kW Control        Fanuc 18i TB Chip conveyor       Yes Tool eye     Yes B Axis    -182  ...

Table length: 2000 mm Table width: 510 mm Longitudinal X: 1660 mm Cross Y: 510 mm Vertical Z: 510 mm Positions ATC: 24   Positions APC: 0   CNC Brand: Mazatrol CNC Model: 640 MACH-id     5065 MAKE          Mazak Japan TYPE           VTC 20-C YOP             1997 SPECIFICATIONS Spindle Taper ISO/Bt   40 kW power on spindle      11 kW X - Travel     1660 mm bed / plano / portal / moving column      moving column Controll     Mazatrol 640Y - Travel    510 mm Z - Travel     510 mm Table Length x Width        2000 x 510 mm Table load in kG        1000 Kg Spindle speeds / ranges       7000 Rpm ATC tool ch ...

Welding robot robot FANUC 100i OConstruction year: 1998 Country of origin: Japan Axis range: J1: +/-165° J2: +135 -75° J3: +150 -149° J4: +/-190° J5: +/-140° J6: +/-320° Max arm area: 1 368 mm Pallet: 850 x 810 mm Power source: OTC Max payload: 6 kg Control: CNC SYSTEM R-J2

Machine details Bearing number 1105-03062 Machine type Machining center - Horizontal Make MAZAK Type FH 680 Built in 1997 Control type CNC Warehouse FRANCE Country of origin Japan Delivery time immediately Freight base from location Technical details x-way 1050 mm y-path 800 mm z-way 880 mm Control MAZATROL M plus Pallet changer type 2-fold Pallet size 630 x 630 mm Tool changedevice 40 Tool holder bt 40 Table load 1 t Pallet change time 6 sec Rapid response 40 m/min Feed 1-40,000 mm/min Speed 35-7000 rpm Drive power 30 kW Workpiece dimensions max. 1000X 1000 mm Tool diameter 135/260 mm Tool length - max. 500 mm Tool weight max. 7 kg Total power requirement 45 kVA Machine weight approx. 15 t Space requirement approx. 19 m2 Information High-pressure cooling by spindle 20 bar MAZATROL m plus Synchronous thread cutting NC Round table 0.001° x 360,000 p ...

Turning diameter: 923 mm Turning length: 1250 mm Turret positions: 12 Positions ATC: 0   Number controlled axis: 4   CNC Brand: _Unknown / Other CNC Model: mAPS msx 850 III MACH-id    4462 MAKE         Mori Seiki Japan TYPE            NL 2500 Y 1250 YEAR           2008 SPECIFICATIONS Swing over bed    923 Swing   755      Distance between centres         1250 Power kW  live tools        5.5 X Axis       260 Z Axis        1345 Y Axis mm      100 C Axis         360.000 Control       MAPS MSX 850 - III Chip conveyor         Yes Tool eye     Ye ...

HYDRAULIC PUMPS - 3Nos MAKE: KAWASAKI HEAVY Ind. JAPAN TYPE: BZ732S215LH REGISTERED TYPE: R3041L-2SOL

MAKE:FUKUSHIMA LTD. TYPE:MGA-8B MAX WORKING PR. YEAR:1979 WEIGHT:1150 MFG NO.:29760 JAPAN E SEI NO.

MAKE:FUKUSHIMA LTD. TYPE:MGA-8B MAX WORKING PR. DATE OF MFG:1979 WEIGHT:1150 MFG NO.:29760 JAPAN E SEI NO.

Turning diameter: 840 mm Turning length: 2000 mm Turret positions: 0 CNC Brand: _Unknown / Other CNC Model: Matrix Nexus MAKE   Mazak - Japan TYPE     QUICK TURN NEXUS 450 II-M YEAR     2007 SPECIFICATIONS Swing over bed   Ø  840 mm Control                MATRIX NEXUS Swing over cross slide   580 mm Distance between centres        2.029 mm Spindle bore         184 mm Spindle speeds / ranges     2000 Rpm Power     37 Kw DIMENSIONS Length     5000 mm Width       1700 mm Height       2100 mm CNC Mazak Quick turn nexus 450 II M mill turn for sale

MAKE:FUKUSHIMA LTD. TYPE:MA10B MAX WORKING PR.:30 MFG NO.:29801 DATE OF MFG:1979 WEIGHT:1800 KG FUKOSHIMA LTD. JAPAN T SAITO

MAKE:FUKUSHIMA LTD. TYPE:MA10C MFG NO.:29807 Max. Working Pressure:30kg/cm2 WEIGHT:1800 KG FUKOSHIMA LTD. JAPAN T SAITO

Robot KAWASAKI ZX165U Built: 2009 Control: CNC 6-axis Max arm area: 2 651 mm Max payload: 165 kg Country of origin: Japan

Capacity: 50 t Folding length: 1270 mm CNC Brand: _Unknown / Other CNC Model: AB PAD Revolition Touch Screen MACH-id   3726 MAKE        AMADA Japan TYPE          HFE M2 5012 YEAR         2011 SPECIFICATIONS Controll     AB - PAD EVOLUTION TOCH SCREEN Pressbrake / Folding / Mech. / Hydr.     Pressbrake   Hydraulic Bending length    1270 mm Distance between column       1035 mm Press force             50 Ton Throat       100 mm Stroke          150 mm Die height    370 mm Number off controlled axis   R / Z Power   6 kW DIMENSIONS Length    2710 mm Width     2320 mm Height&n ...

Welding robot FANUC R-2000iA/165F Built: 2001 Control: CNC R-J3iB 6-axis Max arm area: 2 650 mm Max payload: 165 kg Country of origin: Japan You can buy the robot without the welding head

Welding robot FANUC S-430iW Built: 2000 Control: CNC R-J3 6-axis Max arm area: 2 643 mm Max payload: 165 kg Country of origin: Japan You can buy the robot without the welding head

Yanmar Diesel Generator Set 7 kVA E-Start - AVR - 230 / 400 Volt - - - - - Engine: - Manufacturer: Yanmar (Japan) - Model: L100AE - 1 cylinder - Diesel - Air-cooled - Power: 10 hp - - - - - Generator: - Manufacturer: Linz (Italy) - 6 / 7 kVA - 230 / 400 volts - 50 Hertz - - - - Equipment: - Electric start - AVR controller - 1x 230V 16A socket - 1x 400V 16A socket - incl. hedging - Voltmeter - - - - - Other data: - Dimensions: 78 x 57 cm - Weight: 122 kg - Consumption: 1.8 ltr. / h (75%) - - - - - Scope of delivery: - Yanmar diesel generator 6 / 7 KVA - with electric start - Tank - Exhaust - Battery - Sockets - - - - - Transport: - A Germany-wide transport including unloading by truck with lifting platform and pallet truck is possible for an extra charge - Freight price on request - - - - - Price, invoice and payment: ...

Key data: 1150 , 650 , 500

Machine details Bearing number 1105-02989 Machine type Machining Center - Vertical Make MAZAK Type VTC 20 B Built in 1996 Control type CNC Warehouse FRANCE Country of origin Japan Delivery time immediately Freight base from stock Technical details Information CNC control MAZATROL M PLUS , 24 X-fold tool changer, coolant device 10000 R/MIN

Machine Details Warehouse number 1105-03539 Machine type CNC lathe Mori SEIKI brand Type SL 15 MC Year of construction 1995 Control type CNC Control fanuc 16 T Storage location FRANCE Country of origin Japan Delivery time immediately Freight base from stock Price Technical details Turning diameter 420 mm Turning length 560 mm Control fanuc 16 T Vibration diameter 455 mm Rapid traverse in X and Z direction 18/24 m/min Travel x/z 220 / 520 mm Rod diameter 45 mm Spindle motor 11 / 7.5 kW Spindle speed 50 - 5000 rpm Spindle torque 143 Nm Spindle nose JIS A2-5 Revolver Stations 12 Tailstock pinole holder MK 4 Tailstock pinole stroke 80 mm Tailstock pinole diameter 75 mm Tailstock travel 450 mm Total power requirement 25 kW Information - CNC - Control MSG 516 fanuc 16 3 BAKE FOOD KITAGAWA DIA 165 - Coolant device SPAENEFOERDERER

High Speed Precision Press Maker Obata (Japan) Year of manufacturing - 1981 Capacity 10 t Stroke length 22 mm Speed 100-400 stroke/min price 6000 EUR

The laser WUXI CHEERON QY-LC1500-2540 FIBER was produced in 2020 by the brand Wuxi Cheeron Qingyuan Laser Technology Co. The machine is new, it was only included for a test run after the purchase. The machine uses an IPG Photonics (Germany) laser source. The 3-axis fiber optic laser cutter has a power of 1500 W and a large working area of ​​4000 x 2500 mm. The modern design of the laser guarantees many processing possibilities, thanks to the fact that it is equipped with two automatic sheet metal loading tables, a cutting chamber, a large LCD screen, and extensive equipment. Laser technical parameters: - two automatic feeding tables: 4000 x 2500 mm - cutting working surface: 4000 x 2500 mm - closed, illuminated cutting chamber, with strong gas extraction - HD cameras for viewing in the cutting chamber and external viewing of loading tables - a closed container with a control  ...

Machine Details Warehouse number 1105-03576 Machine type CNC lathe - inclined bed machine LeadWELL brand Type T 6 L Year of construction 2011 Control type CNC Control FANUC O ITB Storage location HAGUENAU Country of origin Japan Delivery time by appointment Freight base EX WORK Technical details Turning diameter 210 mm Turning length 400 mm Control FANUC OI TC Travel - x 125 mm Travel - z1 460 mm Rod passage: 50 mm Number of revolvers: 1 piece Number of tools in revolver 1 12 pieces Speed range main spindle: 5000 rpm Drive power 7.5 kW Spindle nose A2-5 Feed range 1 - 15000 mm/min Rapid traverses 25 m/min Information CNC CONTROL FANUC OI TC 12 COMPARTMENT TURRET CHUCK + TAILSTOCK+ SWARF CONVOYER

Product number: 1959WB Type: TPJ630 Serial number: 4T210793 Year of construction: 1999 Belt width: 630 mm Power: 3 x 380V, 50Hz Dimensions: 2700 x 1250 x 2100 mm For standard crumbs and japanese crumbs

Machine Details Warehouse number 1105-03446 Machine type machining center - Horizontal Haas brand Type HCE 400 P Year of construction 2000 Control type CNC Haas control system Storage location FRANCE Country of origin Japan Delivery time by arrangement Freight base EXW (Incoterms 2000) Price Technical details x-displacement 560 mm y-way 635 mm z-path 560 mm Haas control system Pallet size 400x400 mm Table load 400 kg Spindle motor 22 kW Spindle speed 8100 1/min Rapid speed 36 m/min Pallet changer type 2-fold rotation Table indexing 360000° ° Tool magazine: 30 x BT 40 Total power requirement 54 kVA Machine weight approx. 8 t Space requirement approx. 2.8 x 5.5 m Accessories Conveyor Information Still very precise horizontal center full B AXIS 30X BT 40 TOOL CHANGER CNC HAAS 2 PALLETS 400 X 400 MM