Used Promatec Chips Center for sale (17,683)

Condition: excellent (used), Year of construction: 2012, machine/vehicle number: 242536, travel distance X-axis: 1,050 mm, travel distance Y-axis: 530 mm, travel distance Z-axis: 510 mm, table load: 1,200 kg, spindle speed (max.): 12,000 rpm, number of slots in tool magazine: 30, Equipment: chip conveyor, documentation/manual, MACHINE INFORMATION Manufacturer: Mazak Model: VCS 530C Year: 2012 Condition: (Used) Great Serial Number: 242536 Control: Mazatrol Smart Accessories: 4th Axis, Renishaw Spindle Probe, and Tool probe. Pgedpfx Akjz D Euvjiou MACHINE SPECIFICATIONS Control: Mazatrol Smart X Axis Travel: 1050mm Y Axis Travel: 530mm Z Axis Travel: 510mm Max Workpiece Weight: 1200KG Spindle Speed: 12,000rpm Table Size: 1300 x 550mm Tool Change Capacity: 30 ATC Tool Size: BT40

Condition: good (used), Year of construction: 2011, functionality: fully functional, 5-axis machining center Hedelius RS 805 K Control system: Heidenhain iTNC 530 Pgedpfoz Iw Tfex Akiou Year of manufacture: 2011 Internal machine number: 78 Travel ranges: X-axis 1,500 mm Y-axis 800 mm Z-axis 600 mm Tool holder: SK 40 Tool magazine: 30 positions Spindle speed: 12,000 rpm Accessories: - Inclined bed coolant system SKM 900 - Internal coolant system 25 bar - Chip conveyor - Operating panel - Air blow guns - Flushing guns

Condition: used, Year of construction: 2010, x-travel 1.035 mm y-travel 560 mm z-travel 510 mm control 810 D 3D ShopMill Siemens turning speed range - main spindle 20 - 8.000 min/-1 Pgsdpez I Dy Eefx Akiju power capacity - main spindel 13 / 9 kW max. Torque 83 / 57 Nm tool taper SK 40 DIN 69871 table surface area 1.200 x 560 mm max. table load 1.000 kg table height over floor 720 mm number of toolpositions 20 pos. max. tool diameter 80 mm max. tool-dia with free toolbox 130 mm max. tool length 300 mm change time 1,6 sec change-time chip to chip 7,0 sec rapid traverse 25 m/min total power requirement 17 kVA weight of the machine ca. 4,1 t dimensions of the machine ca. 4,0 x 4,0 x 2,5 m CNC - Machining Center Vertical DECKEL MAHO - DMC 1035 V Ecoline - only 2,300 spindle hours - only 13,700 power-on hours

Condition: excellent (used), Year of construction: 2001, functionality: fully functional, overall weight: 6,700 kg, MAZAK FJV-250 CNC Vertical Machining Center For sale is a robust and powerful Mazak FJV-250 with a double-column/gantry design. Pgjdpfxez Ihxls Akiou Technical specifications: Manufacturer: MAZAK Model: FJV-250 Year of manufacture: 2001 Control: Mazatrol PC Fusion 640 M Travel ranges: X-axis: 1,020 mm Y-axis: 510 mm Z-axis: 460 mm Table size: approx. 1,200 × 550 mm Max. spindle speed: 12,000 rpm Tool holder: SK40 / ISO40 3-axis CNC machining center The FJV-250 is designed for precise and demanding milling operations thanks to its stable double-column construction. The generous work area allows for the machining of larger and heavier workpieces. The Mazatrol PC Fusion 640 M control system enables both comfortable Mazatrol dialog programming and the processing of CNC programs. The machine can be inspected and demonstrated under power by arrangement. Location: 78120 Furtwangen, Germany Subject to prior sale and errors in the technical specifications.

Condition: used, CNC machining center Manufacturer: SCM Type: Morbidelli Author 430S Year of manufacture: 2006 Psdez Inkbspfx Akiogu Technical data - Working area: 1300x3600x180 mm - Equipped with milling spindle, drilling unit, and saw - Horizontal machining units - Original SCM software - The machine is in good working condition. Note: The technical data and descriptions are copies of the original order confirmation. The information is provided for informational purposes only and is not binding.

Condition: ready for operation (used), Year of construction: 2006, operating hours: 3,010 h, functionality: fully functional, travel distance X-axis: 1,000 mm, travel distance Y-axis: 530 mm, travel distance Z-axis: 510 mm, controller model: Fanuc Oi-MC, spindle speed (max.): 10,000 rpm, TECHNICAL DETAILS Travel range, X-axis: 1,000 mm Travel range, Y-axis: 530 mm Travel range, Z-axis: 510 mm Table length: 1,200 mm Table width: 510 mm Podpfx Aksz Ebb Ueijgu Orientation: Horizontal Tool interface: ISO 40 Max. spindle speed: 10,000 rpm Tool positions: 24 MACHINE DETAILS Control: CNC Control system: Fanuc Oi-MC Number of axes: 3 Power: 11 kW Dimensions & Weight Dimensions (L x W x H): 2,850 x 2,150 x 2,300 mm Net weight: 6,000 kg Shipping packages: 3 Operating hours: 3,010 h EQUIPMENT Spindle cooling Documentation CE marking External cooling Tool magazine Chip conveyor Tools included

Condition: good (used), Year of construction: 2005, functionality: fully functional, Technical details x-travel 1040 mm y-travel 600 mm z-travel 500 mm Control Heidenhain iTNC 530 table surface area 1250 x 600 mm table load 600 kg tool taper SK 40 spindle turning speed range 1 - 8000 U/min max. torque on the spindle (S1/S6) 140/200 Nm feed range 40000 mm/min rapid power traverse in X-and Z direction 70 m/min rapid motion - y-axis 40 m/min spindle drive (100/40 % ED) 13/19 kW total power requirement 39 kVA weight of the machine ca. 8,9 t Additional information Operating hours 70294 Spindle hours 23335 Please note the enclosed geometry measurement report with the tool pull-in force measurement. Equipment: CNC control Heidenhain iTNC 530 Electronic handwheel Heidenhain HR 410 Motor spindle with increased torque Direct path measuring system in Y-Z axis Preparation for measuring probe 30-station tool changer, tool diameter 100/140 mm, length 300, weight 7 kg ROTOCLEAR Production package 2 Internal coolant supply through the spindle 20 bar Coolant system with paper belt filter Cooling device blown air through the spindle center selectable via M function Chip conveyor Bed flushing Linear drive in the X-axis Operating mode 4 Program check with extended manual intervention Machine documentation Psdpfx Asz D Aquekisgu Transport dimensions: 4100 x 2500 x 3000 mm

Condition: used, Year of construction: 2000, x-travel 1120 mm y-travel 510 mm z-travel 510 mm control Mazatrol 640 M Pgsdpfx Ajztfu Dokiou

Condition: good (used), Year of construction: 2008, functionality: fully functional, travel distance X-axis: 600 mm, travel distance Y-axis: 540 mm, travel distance Z-axis: 540 mm, Manufacturer: Bridgeport / Hardinge Model: GX 600 Year of construction: 2008 Control system: Siemens 810D Machine type: CNC vertical machining center Axes: 3 (X, Y, Z) Travel distances: X-axis: 600 mm Y-axis: 540 mm Z-axis: 540 mm Psdpsz Rz Igefx Akisgu Distance from spindle nose to table: 145–685 mm Work table: Table dimensions: 750 × 540 mm Max. table load: 700 kg T-slots: 3 × 18 mm Main spindle: Spindle speed: 8,000 rpm Spindle power: approx. 15 kW Tool holder: SK40 Tool changer: Tool magazine: 20 positions Max. tool diameter: 94 mm Max. tool length: 250 mm Max. tool weight: 6 kg Tool change time: approx. 6 seconds Feed rates: Rapid traverse X/Y/Z: 36 m/min Max. working feed rate: 12,000 mm/min Accuracy: Positioning accuracy: 0.010 mm according to ISO 230-2 Machine data: Machine weight: approx. 5,260 kg Coolant tank: 230 liters Compressed air supply: approx. 5 bar

Condition: ready for operation (used), Year of construction: 1995, input voltage: 400 V, number of axes: 5, number of slots in tool magazine: 24, controller manufacturer: BWO, MAKA HC 57 R (Robot) CNC Machining Center 5-Axis Type HC-57 R / Machine No. 420 747 / Year of manufacture 1995 / Circuit diagram no. 320 177 The machine is operational and exceptionally robustly constructed (milling spindle, tool changer, vacuum pump, support, etc.) and equipped with existing electronics (control unit, circuit boards, transformer). It shows age-related wear in areas such as wiring, pneumatic lines, central lubrication lines, etc. It runs and is ready for operation, but due to the above-mentioned wear, it is being offered as a source of spare parts or for refurbishment. Collection from 41334 Nettetal, workshop edge. Price negotiable. If no buyer is found for the assembled, complete machine, the machining center will be dismantled. The spare parts will then be offered individually. Podpjz R Dqqofx Akisgu Interested parties in MAKA spare parts can contact us in advance regarding details or spare parts inquiries.

Condition: used, Year of construction: 2003, Technical details: x-travel: 800 mm y-travel: 400 mm z-travel: 350 mm total power requirement: 44 kW weight of the machine ca.: 8,8 t dimensions of the machine ca.: 6,1 x 4,1 x 3,3 m Pgodpfouqq Uqox Akieu tool taper: HSK63 number of spindle speeds: 36-12.000 Number of tools: 2 x 21 St. rotary table diameter: 1340 mm

Condition: good (used), Year of construction: 2009, CNC Machining Center Fanuc Robodrill α-T21iFa Pjdpfexflr Hsx Akijgu TECHNICAL SPECIFICATIONS Manufacturer: Fanuc Model: Robodrill α-T21iFa Year of manufacture: 2009 Control: Fanuc Series 31i-MODEL A5 Spindle speed: up to 24,000 rpm Travel X-axis: 500 mm Travel Y-axis: 400 mm Travel Z-axis: 330 mm Rapid traverse X, Y, Z: 54 m/min Tool magazine: 21 positions Max. tool weight: 2 kg Total tool weight: 23 kg Max. tool diameter at 150–12,000 rpm: 80 mm Max. tool diameter at 12,000–15,000 rpm: 60 mm Max. tool diameter at 15,000–20,000 rpm: 45 mm Max. tool diameter at 20,000–24,000 rpm: 40 mm Permissible table load: 300 kg SCOPE OF DELIVERY Includes (not limited to): CNC machining center Fanuc Robodrill α-T21iFa Rotary unit for 4th and 5th axis Coolant pump and chip tray Exact scope of delivery according to photo series The Fanuc Robodrill α-T21iFa, built in 2009, is a versatile CNC machining center equipped with an additional 4th and 5th axis through the integrated rotary unit. This extension enables demanding multi-axis machining applications and significantly increases production flexibility. With a spindle speed of up to 24,000 rpm and travels of 500 x 400 x 330 mm, this machine provides ideal conditions for precise milling operations with high productivity. The 21-position tool magazine reduces setup times and allows for rapid tool changes. Thanks to its robust construction, a table load capacity of up to 300 kg, and the powerful Fanuc 31i control unit, this machine is perfectly suited for both series production and complex single parts. The integrated coolant system ensures process reliability and long tool life. No guarantee is given for the accuracy, completeness, or currency of the information provided.

Condition: reconditioned (used), Year of construction: 2013, functionality: fully functional, CNC vertical machining center "KUNZMANN BA 1000 SK" Pgodpfeyx Ua Ajx Akisu Equipped with Heidenhain iTNC 530 path control. Year of manufacture: 2013 Travel ranges: X 1020 mm, Y 620 mm, Z 920 mm Spindle speed range: 1 – 14,000 rpm, stepless With the following accessories: - Fixed angular table, 1200 mm x 610 mm clamping surface - NC attachment rotary table WALTER, diameter 500 mm - B-axis swivel head (torque drive), +30 / -120 degrees - Vertical tool changer with 40 magazine positions (SK 40) - 3D Heidenhain touch probe - Electronic handwheel - Fixed full enclosure with internal lighting - Coolant through spindle (IKZ system) - Coolant system - Oil mist extraction - Chip conveyor - Operating manual

Condition: used, Year of construction: 2015, functionality: fully functional, JESSEY CHAMPION CP 1540 VS Guide and Lead Screw Lathe Manufacturer: Jessey Type: Champion CP 1540 VS Year of manufacture: 2015 Condition: used Scope of supply: - Coolant system - Machine light Pgodpfx Akozminuoisu - Machine feet - Documentation - Chuck jaws - Digital display - MultiFix B Further information available upon request.

Condition: used, Year of construction: 1963, Technical details: turning diameter over bed: 1000 mm turning diameter over support: 620 mm turning length: 3150 mm centre distance: 3150 mm turning diameter in the gap: 1200 mm length of gap: 800 mm Pedpfx Aju Ix Arjkiegu weight of the machine ca.: 11,5 t dimension machine approx.LxWxH: 7,5 x 1,5 x 1,7 m incl. 2x steady rests and various tips *

Condition: used, Year of construction: 1955, Technical details: turning diameter over bed: 420 mm turning diameter over support: 240 mm Psdou Ix D Aepfx Akiogu turning length: 1100 mm turning dia. in gap: 600 mm range of revolution per miute: 24 - 900 / 8 step U/min spindle bore: 41 mm range of feed in x - axis: 0,0120 - 0,1000 mm/U range of feed in y - axis: 0,0062 - 0,0302 mm/U tailstock quill taper MT: 3 tailstock quill adjustment: 220 mm total power requirement: ca. 4,0 (ohne Gewähr) kW weight of the machine ca.: 1,2 t dimension machine xH: 2,3 x 0,9 x 1,3 m Equipment: 3-jaw chuck Ø 200mm Tool holder 4-way, swivelling 30° right/left T-slot for copying device Driving disc *

Condition: used, Technical details: turning diameter over bed: 340 mm turning diameter over support: 190 mm Pedpfou Ixw Asx Akiegu turning length: 700 mm centre distance: 700 mm revolution per minute: 55 - 2350 / 8 step mechanisch U/min spindle bore of work spindle: 50 mm tailstock quill adjustment:: 120 mm tailstock quill: MK3 mm max. torque on the spindle: 350 Nm max. workpiece weight -without tailstock: 50 kg total power requirement: 3,0 kVA weight of the machine ca.: 0,79 t dimension machine xH: 1,6 x 0,9 x 1,4 m The machine has seen very little use and was operated only in a repair workshop. Accessories: comparable in the picture 2x steady rest (1x closed and 1x open) various tips various lathe chucks and jaw pairs *

Condition: used, Year of construction: 1999, Technical details: Pgsdpju Ixzbefx Akieu turning diameter over bed: 460 mm turning diameter over support: 388 mm turning length: 1016 mm centre distance: 1016 mm center height measured in bed: 230 mm turning dia. in gap: 640 mm spindle bore of work spindle: 52 mm range of revolution per miute: 30 - 2000 / 12 step U/min feeds:: längs: 0,032 - 0,898 mm/U feeds:: plan: 0,016 - 0,449 mm/U tailstock quill taper MT: 4 tailstock quill adjustment:: 120 mm total power requirement: 3,75 kW weight of the machine ca.: 1,6 t dimension machine xH: 2,1 x 1,1 x 1,5 m Switchable gearbox Quantum 3-way length measuring system Top slide adjustment +/-90° Multifix quick-change steel holder 3-jaw chuck Ø 200mm rotating center in tailstock Threads: Inch thread; Metric thread; Trapezoidal thread; Module thread Accessories: Change gears, machine feet, 1x fixed quill tip *

Condition: used, Year of construction: 1987, Technical details: x-travel: 700 mm y-travel: 500 mm z-travel: 600 mm table swivelling +/-: A-Achse: 20° / 60° Grad table rotating: B-Achse: 360° Grad control: Maho 432 (3-D Bahnsteuerung) Max. Milling-capacity: ST: 60 und GG: 22 mm tool changer with: 24 Plätze number of spindle speeds: 20 - 6300 U/min. max. table load: 200 kg spindle taper MT: ISO 40 (hydr. Spannung) spindle head swivable left - right: 90° (manuell) ° quill stroke: 80 mm feed range: X/Z: 1 - 3000 und Y: 1 - 4000 und B: 0,1 - 3000°/min. mm/min rapid traverse:: X/Z: 10 und Y: 8 und B: 20 U/min. m/min control voltage: 110/220 V total power requirement: ca. 20 kVA Weight approx.: 5,5 t dimension machine xH: 3,0 x 2,4 x 2,25 m space requirements of the machine approx.: 5,2 x 5,0 x H: 2,3 m NC rotary table Ø 520 mm with A and B axes Adjustable three-phase motor with 4-stage reduction gear Working spindle can be swiveled out for horizontal spindle Pgodpou Idbyofx Akisu Equipment: -manual control unit -coolant device -machine ilumination *

Condition: used, Year of construction: 2001, Technical details: x-travel: 630 mm y-travel: 560 mm z-travel: 560 mm c-axis: Tisch 360° ° b-axis: Spindel=rechts:90/links=10° manuell ° control: Heidenhain TNC 430 MillPlusM Podpfxou Idgco Akiegu table-size: 1000x600 mm table load capacity: 400 kg tool taper: SK 40 Revolution per minute: 20 - 12 000 U/min. feed speeds infinitely variable: x/y/z= 20 - 10.000 mm/min tool changer: 2 Magazine tool changer with: 12 place pro Magazin spindle hours: 21 212 h operating hours - idle run: 49 845 h total power requirement: 20,6 kW Weight approx.: 6,7 t dimension machine xH: 3,0 x 2,0 x 2,15 m Equipment: - AC motors for x/y and z-axis - Tool clamping hydraulic/mechanical - Chip conveyor with separator (screw conveyor) - seperately working indexing head Ø 300mm with manual control unit for B-axis table tilting -10° / +95° and C-axis table turning 360° (not interpolable, electric selectable via manual control unit) - Coolant unit 8 m³/h (dimensions: L:1,1 x W: 0,54 x H:1,2m) - control unit *

Condition: used, Year of construction: 1996, Technical details: x-travel: 762 mm y-travel: 510 mm z-travel: 560 mm control: Heidenhain TNC 415 OR 360 Pgjdpeu Idmvjfx Akieu tool changer with: 21 place table clamping surface:: 865 x 510 mm table load: 455 kg tool taper: SK40 spindle revolutions per minute : 60 - 8000 U/min feed:: X/Y/Z; 15 000 mm/min rapid traverse : X/Y/Z: 24 m/min compressed air: Bedarf: 5,5 bar Total power requirement: 30 kVA motor capacity: Spindelmotor: 11,0 kW max. torque on the spindle: konstant: von 60 - 750 KN Weight approx.: 4,3 t dimension machine xH: 2,6 x 2,8 x 2,6 m dimension coolant device: L: 2,7 x B: 0,8 x H: 0,8 m Machining center with automatic tool changer IKZ and coolant supply through nozzles Chip and coolant tray Lubrication system through ball screws Manual control unit Heidenhain TNC 415 - dialog or according to ISO (machining cycles: deep hole drilling; tapping; slot milling; rectangular pocket and circular pocket milling; SL cycles), up to 100 programs in file management Machine can be visited with pleasure under power. i.D. *

Condition: good (used), Year of construction: 1998, Manufacturer: SAEILO Model: CONTUR TV 1000 Year of manufacture: 1996 Control system: Heidenhain Number of axes: 3 Travel distances: X-axis: 1,016 mm Y-axis: 610 mm Z-axis: 508 mm Work table: Table size: 1,080 × 580 mm Maximum table load: 600 kg Main spindle: Spindle speed: 5–8,000 rpm Spindle power: 11 / 16.5 kW Tool holder: SK40 Spindle gearbox: 2-stage Tool changer: Automatic tool changer Tool magazine: 40 positions Tool holder: SK40 Feed rate: Working feed rate: 0.25–5,080 mm/min Rapid traverse rate X/Y: 20,000 mm/min Pgsdpfez R I Stox Akisu Machine weight: Approx. 6,000 kg Equipment and accessories The machine features extensive equipment. - Heidenhain CNC control system - Automatic 40-position tool changer - SK40 tool holder - Electronic handwheel - 3D probe - 3-jaw chuck - Machine vice

Condition: used, Year of construction: 1975, Technical details: turning diameter over bed: 500 mm turning diameter over support: 260 mm turning length: 950 mm center height measured in bed: 220 mm centre distance: 1000 mm revolution per minute: 11,2 - 2240 / 24 step U/min spindle bore of work spindle: 62 mm tailstock quill adjustment:: 210 mm longitudinal feeds:: 0,045 - 1,6 mm/U - 32 step cross feed: 0,02 - 0,71 mm/U - 32 step total power requirement: 11 kW weight of the machine ca.: k.A. t dimension machine xH: 3,3 x 1,2 x 1,6 m The machine is in a very good condition (very quiet spindle run) in Leipzig. Top slide rotatable 360° 3-jaw lathe chuck Ø 315mm with jaws (inside/outside) for speed 2000 rpm. Thread cutting: metric, modular thread, inch Chip protection wall Chuck protection (mechanical) MULTIFIX steel holder with Ø 40mm drill steel holder Chip collection tray Pgodpfxov A Sqhj Akisu Coolant supply with pump Protective device for lead screw Machine base UVV is pre-equipped ( UVV=Accident Prevention Regulations) *

Condition: repair required (used), Year of construction: 2013, functionality: unexamined, machine/vehicle number: GM 5251/01-01 NEU 4541/01-08 ALT, travel distance X-axis: 550 mm, travel distance Y-axis: 655 mm, travel distance Z-axis: 685 mm, feed rate X-axis: 90 m/min, feed rate Y-axis: 75 m/min, feed rate Z-axis: 90 m/min, nominal power (apparent): 58 kVA, torque: 197 Nm, total height: 3,100 mm, total length: 4,000 mm, total width: 2,700 mm, table width: 1,300 mm, table length: 800 mm, table load: 1,070 kg, rotational speed (max.): 8,000 rpm, overall weight: 15,000 kg, spindle motor power: 25,000 W, spindle mount: MK 0, number of spindles: 2, number of slots in tool magazine: 72, tool length: 300 mm, tool diameter: 160 mm, tool weight: 8 g, input voltage: 400 V, type of input current: AC, Equipment: rotational speed infinitely variable, GROB G320EA22K – CNC Double-Spindle Horizontal Machining Center, 4 Axes The machine is stored in Hamburg. No CE marking, as it was originally intended for use in China. For sale is a GROB G320EA22K CNC horizontal machining center with two spindles and 4-axis machining. The machine is equipped with a Siemens 840D sl control system and is suitable for precise and efficient machining in industrial production. Technical data: Manufacturer: GROB Machine type: G320EA22K Machine type: CNC horizontal machining center Control system: Siemens 840D sl Number of axes: 4 Number of spindles: 2 Spindle distance: 550 mm Spindle manufacturer: Kessler Max. spindle speed: 8,000 rpm Spindle power: 20 kW (S1) / 25 kW (S6) Spindle torque: 159 Nm (S1) / 197 Nm (S6) Tool holder: HSK-A63 Tool magazine: 2 × 49 slots (98 tools) Max. tool diameter: 86 mm / 160 mm with limitations Max. tool length: 300 mm Max. tool weight: 8 kg Tool change time chip-to-chip: 2.7 seconds Travel distances X/Y/Z: 550 × 655 × 685 mm Rapid traverse X/Y/Z: 65 / 55 / 90 m/min NC rotary table: Ø 800 / 1,300 mm Max. workpiece weight on the rotary table: 1,070 kg Rotary table speed: 25 rpm Positioning accuracy of axes: 0.006 mm Repeatability of axes: 0.004 mm High-pressure coolant system: 80 bar Coolant temperature control: available Filter fineness: 30 µm Machine dimensions (L × W × H): approx. 4,000 × 2,700 × 3,100 mm Machine weight: approx. 15,000 kg Pgedpfoz R Upfjx Akiou Installed power: 58 kW Compressed air requirement: 15 Nm³/h at 5 bar Additional equipment: Fully enclosed machine Closed-loop control of the axes Temperature monitoring and water cooling of the spindles Automatic tool changer Tool cleaning system Central lubrication for guides and ball screws Automatic, reversible high-pressure coolant filtration No CE certification, as it was originally intended for use in China.

Condition: used, Year of construction: 2007, Technical details: Pgsdpfxsw A I Uus Akiou x-travel: 635 mm y-travel: 460 mm z-travel: 510 mm control: 3D Heidenhain i TNC 530 table-size: 790 x 560 mm table load capacity: 600 kg tool taper: SK 40 Revolution per minute: 20 - 10.000 U/min. tool changer with: 20 place spindle hours: 36.050 h operating hours - idle run: 91.000 h total power requirement: 13,9 kW Weight approx.: 3,6 t tool taper: SK 40 Tool changer: 20-fach dimension machine approx.LxWxH: 3,0 x 2,0 x 2,15 m