Used Double Column Mill for sale (23,615)

Condition: used, Double-column hydraulic press SCHÖN Type SH 25 Machine no.: 4453 Year of manufacture: 1999 Pressing force: 25 tons Column width: 500 mm Lateral column clearance: 120 mm Table surface: 440 x 320 mm Fsdpfsw A Amrox Aategg Table opening: Ø 175 mm Ram surface: 360 x 220 mm Clamping pin bore: Ø 40 mm Max. ram stroke: 100 mm Max. installation height: 270 mm Table height above floor: 900 mm Motor power: 7.5 kW Connection voltage: 380 V, 50 Hz Equipment: - Safety light curtain SICK, type FGS 300-11 - Two-hand operation - Stroke counter - Rapid and working stroke - Stroke limitation dependent on pressure or position - Mechanically adjustable fixed stop - Pressing force regulation - Adjustable pressing time 1–10 s (pressure holding time) - Adjustable return stroke speed - Blow-off device electrically pre-wired, without air valve - Manual hydraulic tool safety, adjustable via handwheel Dimensions (L x W x H): 1300 x 1200 x 2200 mm Weight: approx. 1200 kg Good condition

Condition: used, Double-column hydraulic press SCHÖN Type UTE/B 50 Machine No. 5509 Year of manufacture: 1971 Pressing force: 50 tons Column span: 550 mm Column clearance (side): 150 mm Table size: 480 x 380 mm T-slot width in machine table: 18 mm Table opening: Ø 70 mm Ram area: 490 x 280 mm Clamping pin bore: Ø 40 mm Max. ram stroke: 150 mm Max. installation height: 390 mm Table height above floor: 890 mm Rapid approach speed: approx. 130 mm/sec Working speed: approx. 20 mm/sec Return speed: approx. 130 mm/sec Motor power: 4 kW Power supply: 380 Volt, 50 Hz - Stepless pressing force adjustment - Rapid and working stroke - Pressure or stroke-dependent stroke limitation - Adjustable pressure holding time, press time extension 0.5–6 s - Mechanically adjustable hard stop via handwheel on ram - SICK light barrier, Type LVU - Stroke counter - Double column guide on ram Fodpfjv Srfwox Aatjgg Space requirement (L x W x H): 1100 mm x 1050 mm x 2320 mm Weight: approx. 1.5 tons Good condition

Condition: used, Year of construction: 1969, press capacity 250 t spindle diameter 160 mm ram stroke range 180 mm stroke speed 71 Hub/min Fgedpfx Aoyt R Epjatog column daylight 450 mm table surface area 560x450 mm ram surface 450x400 mm total power requirement 12 kW weight of the machine ca. 9 t The tech. Data are manufacturer or operator information and therefore non- binding. We reserve the right to prior sale; Our terms and conditions of sale apply exclusively. About us More than 400 of our own machines in stock Over 15,000 m² of storage space, 70 t crane capacity More than 10,000 items and accessories for your workshop If you are interested in selling machines, production lines, or your business, please contact us. You can find further offers on our website. Tours are possible by appointment. We look forward to your visit. Your Markus Hirsch Team

Condition: used, faceplate diameter 2500 mm swing diameter 2700 mm turning height 1600 mm turning speed range - milling 1,18 - 32,5 U/min turning speed range - milling 4,25 - 117 U/min workpiece weight 10000 kg side head - cross travel 800 mm ram head - cross travel 45 degrees - 1000 mm ram head - cross travel 30 degrees - 1000 mm total power requirement 80 kW Fsdpeyuqidofx Aategg 2-Axis D.R.O. 5 positions turret

Condition: excellent (used), Year of construction: 2003, functionality: fully functional, feed length X-axis: 2,500 mm, feed length Y-axis: 1,400 mm, feed length Z-axis: 1,500 mm, spindle speed (max.): 4,000 rpm, table load: 5,000 kg, CNC: SELCA 4045PD AXES TRAVELS X-axis longitudinal travel: mm 2500 Y-axis transverse travel: mm 1400 Z-axis vertical travel: mm 1500 TABLE Table size: mm 1200X1200 Load capacity: kg 5000 Number of divisions: 360.000 T-slots: No. 7 – pitch mm 127 Table axis motor power: kw 6 KOSMO 5 AUTOMATIC BI-ROTARY HEAD Continuous power: kW 28 KOSMO head spindle speed: giri/min 4.000 Plane positioning with HIRTH serration Rear plane rotation: 2,5° Front plane rotation: 3° Tool taper: DIN 69871-A50 Drawbar: DIN 69872-28 (50) PALLET CHANGER: DCN 100 CP MACHINE COMPLETE WITH • Electronic handwheel • Electronic thermal expansion compensation device for the head • High-pressure through-spindle coolnat • Chip conveyor: Double front and rear chip conveyor Fodpfx Ajzg Hqyjatjgg • Sidesalpa tool machine – 40 positions • Full enclosure • Instruction manuals • CE declaration of conformity

Condition: used, Double-column Hydraulic Press SCHÖN Type SH 25 Machine No. 2440 Year of manufacture: 1979 Press force: 25 tons Column spacing: 630 mm Lateral passage between columns: 120 mm Table area: 580 x 320 mm Ram area: 360 x 220 mm Clamping pin hole: Ø 40 mm Maximum ram stroke: 100 mm Maximum installation height: 270 mm Table height above floor: 900 mm Motor power: 7.5 kW Power supply: 380 Volt, 50 Hz - Main cylinder overhauled in 2025 - SICK LUV 206 safety light curtain - Two-hand control - Stroke counter - Rapid stroke and working stroke - Stroke limitation dependent on pressure or position - Mechanically adjustable fixed stop - Press force regulation - Press time extension 1–10 s (pressure holding time) - No operating manual and no wiring diagrams Required space (L x W x H): 1450 x 1100 x 2200 mm Weight: 1200 kg Fgjdpsyz Dr Tsfx Aatog In good condition

Condition: excellent (used), Year of construction: 2001, Manufacturer: ROVETTA Model: S4-800 Year: 2001 Condition: Used Stock number: 0392 Builder: Rovetta Slide force: 800 tons Number of driving points: 4 Slide stroke: 700 mm Slide adjustment: 350 mm Strokes per minute: 10-24 Die height (low stroke, high slide adjustment): 1,100 mm Usable distance between front posts: 4,200 mm Bolster table size: 4,000 x 2,000 mm Slide dimensions: 4,000 x 2,000 mm Movable table height: 600 mm Fgedpfeyq Tdpox Aatjg Side window size: 3,400 x 1,900 mm Number of cushions: 1 Blankholder cushion - total force: 150 tons Lower blankholder cushion stroke: 250 mm Lower blankholder working area: 1,500 x 1,000 mm.

Condition: used, OTO MILLS Double decoiler with bottom/top hold-down roll Model AD508SD Scope of supply includes: - Double hydraulic expansible mandrel Fjdpfx Asymadzeategg - Hydraulic Mandrel rotation - Hydraulic Uncoiler rotation/lock - Hydraulic Uncoiler traverse for alignment - Brake pneumatically-operated disc OTO Mills Mandrel: Double hydraulic expansible mandrel Mandrel rotation: Hydraulic Uncoiler rotation/lock: Hydraulic Uncoiler traverse for alignment: Hydraulic Brake pneumatically-operated disc: OTO Mills

Condition: used, Eccentric stamping press HAULICK + ROOS, Type RVD 125 Double-column eccentric press Machine No. 212560, Year of manufacture 1981 Pressing force 125 tons Table size 880 x 800 mm Table opening 470 x 140 mm Column distance 900 mm Column distance, side 415 mm Ram stroke 45 mm Fgjdshlnzkjpfx Aatsg Ram adjustment range 0-80 mm Installed height as shown in the picture 340 mm Stroke rate 50 to 300 strokes/min Motor power, main drive 22 kW Power connection 380 volts, 50 Hz - Double connecting rod drive with 4-bearing eccentric shaft for off-center ram pressure load - Adjacent electrical cabinet - NC roller feed EBU, width 250 mm, year of manufacture 2003 - Adjacent control panel for the roller feed - Strip feed direction from left to right Space requirement (press) L x W x H 3000 x 2000 x 3020 mm Transport height 2950 mm Weight of the press approx. 11 tons

Condition: excellent (used), Year of construction: 2001, Manufacturer: ROVETTA Model: S4-1500 Link Drive Year: 2001 Condition: Used Stock number: 0391 Fsdsyq Tdispfx Aatsgg Manufacturer: Rovetta Number of strokes: 4 Ram force: 1500 tons Ram stroke: 763 mm Ram adjustment: 400 mm Daylight (bottom dead center, ram up): 1,200 mm Distance between front uprights: 5,700 mm Die bed dimensions: 5,500 x 2,500 mm Ram dimensions: 5,500 x 2,500 mm Moving table height: 600 mm Side window size: 3,400 x 1,900 mm Main motor power: 319 kW Blankholder (total force): 150 tons Blankholder stroke: 250 mm Blankholder working area: 2,000 x 1,200 mm Strokes per minute: 8-24

Condition: ready for operation (used), Year of construction: 1998, machine/vehicle number: 8900, functionality: fully functional, pressing force: 20 t, stroke length: 60 mm, throat depth: 176 mm, ram adjustment: 55 mm, stroke rate (max.): 155 1/min, TECHNICAL DETAILS Press force: 20 t Stroke rate: 155 strokes/min Ram stroke: 6 - 60 mm Ram adjustment: 55 mm Ram contact area: 130 x 248 mm Pin hole in ram: 25 x 65 mm Inclination: 28° Overhang: 176 mm Distance from table to ram: 270 mm Fgedpfx Aszb Du Hsatog Passage width: 470 mm Table dimensions: 300 x 450 mm Through hole in table: 90 mm Table height above floor: 775 mm Air pressure (required): 5.5 - 6 bar MACHINE DETAILS Total power consumption: 3.5 kW Control type: conventional Dimensions & Weight Machine dimensions (L x W x H): 1,300 x 1,100 x 1,950 m Machine weight: 1 t EQUIPMENT High-performance press Central lubrication with light curtain (monitored) Linuflex Stroke counter Steel plate (dimensions: 315 x 400 x 50 mm) with center hole (diameter: 63 mm)

Condition: used, Year of construction: 1997, Technical details: pressure: 160 t distance between columns: 1000 mm stroke: 250 mm dayligth: 600 mm distance table/ram: 600 mm table height over floor: 550 mm table surface area: 810 x 860 mm clamping surface ram: T x B: 720 x 580 mit T-Nuten mm total power requirement: 15 kW weight of the machine ca.: ca. 16,0 t The machine isn't installed yet. The pictures are from the origin location of the former owner. further details: - sideway passage W: 520 x H: 620mm - passage front side W:660mm x H: 600mm Fgedpfx Aeu Nfmmoateg equipment: - walkable platform arround the machine= height over floor approx. 2400mm, platform approx. 2700 x 2600 x 1050mm - hydraulic pack - oil cooler i.D. *

Condition: used, Year of construction: 1999, x-travel 12000 mm y-travel 3600 mm z-travel 1500 mm spindle turning speed range 3000 U/min Control: Heidenhain iTNC430 Milling head 2 axes, indexed 2.5° Vertical (Y-axis): 3600 mm Transverse (Z-axis): 1500 mm Longitudinal (X-axis): 12,000 mm Guide rail length: 14,700 mm Guide rail width: 1400 mm Lowest milling position of the spindle nose measured from the floor (head horizontal): 855 mm Low column design 870 x 900 x 2,625 mm: 3,000 kg High stand design 870x900x3,025 mm: 3,500 kg Fedpfexwdygex Aatjgg Motor power: 37 kW Mounting: ISO 50/ DIN 69871-A Speeds: 11.7:231:3000 rpm Feed range: 2:2500 mm/min Rapid traverse X-axis: 12000 mm/min Z-Y axis: 15000 mm/min Feed motor power X-axis: 55 Nm Z-axis: 37 Nm Y-axis: 37 Nm Accuracy Positioning accuracy: 0.025 mm Repeatability: 0.015 mm Weight: approx. 42,000 kg Air supply to the machine: 300 L/min at 4.5 bar NOTE: The clamping plates and chip conveyors are not included in the scope of delivery. However, we can offer you both used and new clamping plates and chip conveyors on request.

Condition: used, Year of construction: 1978, pressure 160 t no. of strokes 40 - 120 Hub/min sheet width mm total power requirement 40 kW Pressing capacity 160 ton Table clamping area 1,100 x 1,280 mm Ram clamping area 850 x 890 mm Fgedpfxet Hwz Nj Aatsg Distance between guides 1,120 mm Distance between columns (below guide ways) 1,350 mm Distance between Table and ram in upper position approx. 400 mm No. of strokes 40 - 120 /min Adjustment of stoke 67 / 115 / 160 mm Ram adjustment, motor driven 125 mm Ejector travel 50 mm Total electrical load, approx. 40 kW - 500 V - 50 Hz Weight, approx. 24,000 kg Accessories / Special Features * WEINGARTEN Sheet Metal Uncoiler with overhead loop control (space saving because it does not need a loop-pit). Strip width 375 mm. The loop control guides the strip-material from the uncoiler to the machine thru a straightening device with automatic supervision. * 8-track slide bearing guide. * Automatic oil-circulation lubrication. * Hydraulic overload protection in conjunction with the ORTLINGHAUS Clutch Brake * Safety doors. * Motor-driven ram adjustment 125 mm. * Required space: 4 x 2.2 m. Height max. 4.6 m (only press)

Condition: used, Year of construction: 1972, faceplate diameter 5000 mm swing diameter 6100 mm turning height 2300 mm Fsdsyqtilspfx Aatsgg control Siemens type Sinumerik840D mm 0 55 kW table load 55 t Rest 2 Drehsupporte ram head dimension 340x340 mm Table load 55000 kg turning speeds 280 U/min new control Siemens type Sinumerik 840D in 2015 Accessories and cabinets can be purchased optionally The tech. Data are manufacturer or operator information and therefore non- binding. We reserve the right to prior sale; Our terms and conditions of sale apply exclusively. About us More than 400 of our own machines in stock Over 15,000 m² of storage space, 70 t crane capacity More than 10,000 items and accessories for your workshop If you are interested in selling machines, production lines, or your business, please contact us. You can find further offers on our website. Tours are possible by appointment. We look forward to your visit. Your Markus Hirsch Team

Condition: used, Year of construction: 1965, faceplate diameter 3500 mm swing diameter 4000 mm turning height 3150 mm Fgodsyqtbuepfx Aateg slide adjustment 1700 mm table load 25 t digital readout Heidenhain Rest 2 total power requirement 90 kW weight of the machine ca. 95 t No. 6671024 The tech. Data are manufacturer or operator information and therefore non- binding. We reserve the right to prior sale; Our terms and conditions of sale apply exclusively. About us More than 400 of our own machines in stock Over 15,000 m² of storage space, 70 t crane capacity More than 10,000 items and accessories for your workshop If you are interested in selling machines, production lines, or your business, please contact us. You can find further offers on our website. Tours are possible by appointment. We look forward to your visit. Your Markus Hirsch Team

Condition: new, Year of construction: 2019, machine/vehicle number: DF0303, pressing force: 160 t, table length: 550 mm, table width: 500 mm, working height: 700 mm, pressure:160 t distance between columns:700 mm stroke:400 mm Return Capacity:16 t Engine Output:15 kW Travel:400 mm :600 mm Ram plate:700 x 600 mm table height over floor:850 mm Table size:700 x 600 mm speed of forward flow:10 mm/sec Pressing speed:10 mm/sec :10 mm/sec Oil cooling (electric):1,5 kW (max) Oil Tank Capacity:300 l weight of the machine ca.:4,2 t dimensions:950 x 2440 x 2400 m ejector:30 x 30 mm ejector stroke:150 mm pressure of ejector:15 t ejector speed:25 mm/sec no. of ejector pins:1 Stück heating plates :550 x 500 mm :6800 ? :2400 ? Fsdpsfxyh Refx Aatogg :1200 ? :1200 ?

Condition: new, Year of construction: 2019, machine/vehicle number: DF0303, pressing force: 160 t, table length: 550 mm, table width: 500 mm, working height: 550 mm, pressure:160 t distance between columns:700 mm stroke:400 mm Return Capacity:16 t Engine Output:15 kW Travel:400 mm :550 mm Ram plate:700 x 600 mm table height over floor:900 mm Table size:700 x 600 mm speed of forward flow:50 mm/sec Pressing speed:10 mm/sec :50 mm/sec Oil cooling (electric):1,5 kW (max) Oil Tank Capacity:300 l weight of the machine ca.:4,3 t dimensions:1150 x 2600 x 2400 m ejector:30 x 30 mm ejector stroke:150 mm pressure of ejector:15 t ejector speed:25 mm/sec no. of ejector pins:1 Stück Heating panels (L x B) with 2 measuring sensors diagonally:550 x 500 mm Fgsdpfxsfxygpo Aatog Siemens Control System:S7 1200 Monitor:12 Zoll :2400 ? :1200 ? :1200 ?

Year of construction: 2001, operating hours: 27,046 h, condition: excellent (used), functionality: fully functional, CNC traveling column milling machine in cast iron design Extremely stable design thanks to the X-axis with triple guidance and a fixed table. Machine will be delivered EXW. TECHNICAL DETAILS X-axis (longitudinal) linear guide: 5,300 mm (triple guidance) Y-axis (traverse) linear guide: 1,000 mm (double guidance) Z-axis (vertical) flat guide: 1,500 mm (double guidance) Fgsdpfx Aaelhqkhoteg Spindle speed range: 60 to 3,000 min-1 Tool holder: SK 50 Tool changer: 40-position Pull stud: DIN 69872-B Drive power: 30 kW Tool dimensions: max. L=350mm / D=200mm Table size: 6000x1000mm Heidenhain control: TNC426 with color screen and handwheel Rapid traverse X, Y, Z axes: 10,000 mm/min Clamping area: 6,000 x 1,000mm T-slots: 22 H12 / spacing 130mm Central T-slot: 22 H7 MACHINE DETAILS Operating time: 62,774 hours (as of 11/2022) External coolant pump: 1.1 kW with 50 l/min Machine weight: 43,000 kg EQUIPMENT - Electric handwheel Heidenhain - Swivel machining function monitored with light barriers - New X-axis covers - Chip conveyor, 2-stage - New milling head bearings, 2021 - Operating manual / documentation CONDITION - Service and maintenance have been performed according to schedule - Geometry is in good condition - Suitable for swivel machining Machine available from July-August

Condition: used, Technical details: pressure: 80 t distance between columns: 880 mm dayligth: 200 mm Table dimensions: 880x300 mm height over floor: 1000 mm distance between columns: 800 mm total power requirement: ca. 12 kW machine weight ab.: 2855 kg space requirements of the machine approx.: T:1,4xB:1,65xH:1,9 m Embossing - Hot Embossing application area: - for example: for foils, plastics, paper, hardboard materials etc. - stamp plate size: 600x310mm equipment: - counter - hydr. tank Accessories: - Mounting plate (600x300x90mm) not heatable. Sale as is. Fgjdju Icwtepfx Aateg *

Condition: used, Machine not operational - control system not functioning Available at a special price Double-column hydraulic press ALPHA TEC -- ALPHATEC Type RPS 5000 Factory No. 300487, Year of Manufacture 2006 Pressing force: 500 tons Distance between columns (front and rear): 2520 mm Table area: 2500 x 2500 mm Ram area: 2500 x 2500 mm Ram stroke: 600 mm Maximum installation height: 600 mm Table height above floor: approx. 900 mm Tank capacity: approx. 1000 liters Ram retraction force: approx. 22 tons Adjustable forward speed: 100-800 mm/s Pressure build-up to 5000 kN: approx. 0.7 sec. Return stroke speed: approx. 300 mm/s Main motor power: 75 kW Control pump motor power: 2.2 kW Power supply: 400 Volt, 50 Hz - 8-fold flat guide for the ram Fjdodzqptjpfx Aategg - Hydraulic ram locking in the top dead center position - Adjacent control cabinet (200 x 50 cm) - Electrical control system SIEMENS PLC S7-314 - Operation via SIEMENS OP 170-B (5.7") - 2-hand control panel located beside the machine - Floor-level installation - Table top 2510 x 2530 x 135 mm (approx. 6700 kg) - Central lubrication system - Operating manual with circuit diagrams Space requirement (L x W x H): 372 x 260 x 460 cm Space requirement for horizontal transport (L x W x H): 460 x 372 x 260 cm Weight: approx. 50 tons The machine was used for straightening heated steel flanges. From insolvency – in good condition.

Condition: excellent (used), Year of construction: 2003, Manufacturer: ROVETTA Fgedpfx Ajxlh Rfeateg Year: 2003 Condition: Used Stock number: 0385 Pressing force: 630 tons Number of connecting rods: 4 Slide stroke: 300 mm Slide adjustment: 250 mm Die clearance at BDC: 950 mm Strokes per minute: 15/65 Maximum front opening: 5,200 mm Table dimensions: 5,000 x 2,630 mm Slide dimensions: 5,000 x 2,630 mm Main motor power: 132 kW

Condition: like new (used), Year of construction: 2000, operating hours: 25,000 h, functionality: fully functional, travel distance X-axis: 10,300 mm, travel distance Y-axis: 2,000 mm, travel distance Z-axis: 1,800 mm, position of the milling head: 2.5 x 2.5 °, mount diameter: 50 mm, feed rate X-axis: 10 m/min, feed rate Y-axis: 10 m/min, feed rate Z-axis: 10 m/min, spindle speed (max.): 3,000 rpm, spindle speed (min.): 60 rpm, total width: 50,000 mm, total height: 48,750 mm, total length: 2,12,400 mm, table length: 12,000 mm, table width: 1,650 mm, power: 0.03 kW (0.04 HP), overall weight: 50,000 kg, X-axis: 10300mm Y-axis: 2000mm Z-Axis: 1800mm Table Length: 12000mm Table Width: 1650mm Fsdporx Rtrjfx Aatsgg Table load: 50000 Power on spindle: 22/30kW Spindle speeds: 60-3000Rpm Spindle Taper: 50ISO/Bt/Mk Feed rate X-Axis: 10000mm/min. Feed rate Y-Axis: 10000mm/min. Feed rate Z-Axis: 10000mm/min. Millinghead auto-index:2.5 x 2.5° Working hours: 25000H Length: 21240mm Width: 5000mm Height: 4875mm Weight: 50000kg

Condition: used, Year of construction: 2002, x-travel 16300 mm y-travel 2600 mm z-travel 1600 mm Control Heidenhain type TNC 430 Fodpsyq Swusfx Aategg tool taper ISO 50 spindle turning speed range 22-4000 U/min feed in x - axis 36000 mm/min feed in y - axis 24000 mm/min feed range Z-direction 24000 mm/min main drive motor 37 kW Tool changer 90 The tech. Data are manufacturer or operator information and therefore non- binding. We reserve the right to prior sale; Our terms and conditions of sale apply exclusively. About us More than 400 of our own machines in stock Over 15,000 m² of storage space, 70 t crane capacity More than 10,000 items and accessories for your workshop If you are interested in selling machines, production lines, or your business, please contact us. You can find further offers on our website. Tours are possible by appointment. We look forward to your visit. Your Markus Hirsch Team

Condition: ready for operation (used), Year of construction: 1970, functionality: fully functional, machine/vehicle number: 50052, Year of manufacture: 1970 Serial number: 50 052 The machine was overhauled in 2007. GENERAL CHARACTERISTICS OF THE MACHINE The machine features a fixed gantry with a moving table. The gantry is equipped with a height-adjustable crossbeam, which can be fitted with one or two vertical spindles in the VF 120 version. The gantry can also be fitted with one or two side-mounted (horizontal) VF 160 headstocks. The clamping surface consists of two interconnected clamping tables, which can also be used individually when disconnected (only one table can be operated at a time). Clamping Table: Dimensions of one table: 1,600 x 3,000 mm Total length of connected tables: 7,000 mm Clamping surface of connected tables: 6,500 mm Clamping T-slots (width x pitch x number): 28 mm x 160 mm x 9 pcs Table height from base: 900 mm Travel of one table: 3,000 mm (connected tables: 6,500 mm) Table feed rate: 20 – 2,000 mm/min Rapid traverse: 4,000 mm/min Gantry with height-adjustable crossbeam: Clearance between side columns: 2,020 mm Crossbeam height adjustment: 110 - 1,685 mm Crossbeam feed rate: 1,450 mm/min VF 160 Horizontal Headstock: Taper: ISO 60 Fodpfx Aoxxwy Ajategg Motor power: 30 kW Speed range: 15 – 710 rpm Feed rate: 10 – 2,000 mm/min Number of speeds: 16 VF 120 Vertical Headstock: Taper: ISO 50 Motor power: 18 kW Speed range: 28 – 910 rpm Number of speeds: 16 Overall machine dimensions (L x W x H): 14,780 mm x 5,650 mm x 4,800 mm