Used Circular Sawing Machine - Automatic for sale (76,974)

Condition: new, saw blade diameter 370 mm capacity 90 degrees: round 120 mm capacity 90 degrees: square 100 mm 180x100 mm Working height 925 mm saw blade turning speeds 17 - 70 U/min total power requirement 3,0 kW Ledpfxed Iin Ej Amtjad dimensions of the machine ca. 1,9 x 1,45 x 2,1 m SPECIAL PRICE!!! High-performance vertical circular saw Hydropneumatic fully automatic. (20195) · miter left 60° + right 45° · Hydro-pneumatic control of the saw unit · Electro-pneumatic material feed unit · Smooth-running, powerful worm drive with large Transmission ratio, integrated in a stable cast housing for Achieving optimal cutting results · Vice with double clamping arm for low-burr cuts Lateral quick shift when changing the miter · Precision prism guide of the gear head, laterally adjustable · Particularly stable base frame with built-in automatic cooling system · Large chip drawer · Chip removal brush in the saw blade protective hood CNC control: · With button for over 90 different sawing programs with 99 sub-programs for length, quantity and angle · Automatic feed unit 2,000 mm via ball screw Incremental feed with automatic length compensation. Adjustable for cutting lengths from 25 - 9,999 mm. · Fully hydraulic control of saw frame and clamping devices · Pre-selection of 3 different material feed speeds · Visualization of the entire workflow with simple data entry ATTENTION: Price is without saw blade!!! (saw blade price EUR 204)

Condition: new, saw blade diameter 370 mm capacity 90 degrees: round 120 mm capacity 90 degrees: square 100 mm 180x100 mm Working height 925 mm saw blade turning speeds 15 - 70 U/min total power requirement 1,8/2,2 kW weight of the machine ca. 0,71 t dimensions of the machine ca. 1,9 x 1,45 x 2,1 m ACTION PRICE!!! High-performance vertical circular saw hydropneumatic fully automatic.(20192) · miter left 60° + right 45° · Hydro-pneumatic control of the saw unit · Electro-pneumatic material feed unit · Smooth-running, powerful worm drive with large Transmission ratio, integrated in a stable cast housing for Achieving optimal cutting results · Vice with double clamping arm for low-burr cuts Lateral quick shift when changing the miter · Precision prism guide of the gear head, laterally adjustable · Particularly stable base frame with built-in automatic cooling system · Large chip drawer · Chip removal brush in the saw blade protective hood MPS control: · Save cut start/end · Display of current consumption, number of pieces, cutting time... · Adjustable water cooling · Cutting pressure regulator ATTENTION: Price is without saw blade!!! (saw blade price EUR 204) Lajdpfjd Iin Hex Amtsd

Year of construction: 1987, condition: not inspected (used), Sharpening machine for metal and segmented circular saws. Circular saw blade diameter from 80 - 710 mm. Tooth pitch adjustable. Tooth height 1.2 - 14 mm. Working speed steplessly adjustable, 15 - 180 teeth/min. Laodpfx Amslmkpfjtod Wet grinding system, NC controlled.

Condition: good (used), Year of construction: 1994, functionality: fully functional, Format circular saw Altendorf F 45 Year of manufacture: 1994 S/N 94.09-172 Manufacturer: Wilhelm Altendorf GmbH & Co. KG General Information Machine type: Format circular saw Version: Without scorer Technical Data Aluminum sliding table 3000 mm Main saw blade diameter: max. 450 mm (recommended: 300–350 mm for standard work) Cutting height at 90°: up to approx. 150 mm (dependent on saw blade diameter) Cutting length (sliding table): depending on version, typically 3000 mm Cutting width at rip fence: approx. 1000 mm Main saw speed: Multi-stage – approx. 3000 / 4000 / 5000 rpm Main saw motor power: approx. 4 kW (optionally up to 5.5 kW) Saw blade tilting: 0–45° (manually adjustable) Height adjustment: manual via handwheel Equipment Massive, ball-bearing aluminum sliding carriage (precision-guided) Crosscut fence with adjustable angle stop and flip stops Lsdpfx Amewrfmaetjad Robust rip fence with fine adjustment and digital display Table extension (depending on configuration) Mechanical height protection / saw blade guard Features No scorer: The machine is especially suitable for solid wood and rough cutting of panel materials. Solid industrial quality – durable solid mechanics, easy maintenance Cast iron machine table for high smoothness and precision EXTRA: Altendorf Digit X readout unit at the rip fence Weight 1,100 kg L x W x H = 3.0 m x 1.6 m x 1.5 m

Condition: used, Technical specifications to follow Lodpfxeml H Ne Amtead

Condition: new, Year of construction: 2026, Highly efficient series production Clamp – enter the cutting dimension – start. Automatic saws with loading are a standard of rational series processing of bar and bundle material. Cutting area max. up to 290 x 320 mm. Furnishing Automatic hydraulic sawing machine with NC control for cutting from 0° to 60° right, complying with all CE safety standards The device has 9 programs, each of which composed of 99 individual steps, with a total number of approx. 890 cutting positions, with corresponding piece counter Function: material feed closing fixed vice Blade rotation, distribution of emulsifiable liquid, temple lowering until the end of the cut and return of the feed carriage until specified amount bail return and stop the blade rotation by cooling liquid distribution cycle repetition Hydraulic feed cut by cut with no length limit Numerical control of quantity and length of cut Hydraulic control center with cutting pressure adjustment The saw blade is tensioned electro-mechanically by means of Microswitch monitored. Device with brush for belt cleaning Bimetallic strip 3200 x 27 x 0.9 mm Section thickness 1.2 mm Material feed stroke 600 mm Motor hydraulic center 0.75 kW Electric pump 0.09 kW to cool the belt It is always possible for you to inspect the desired system in our production/demonstration hall. Lasdpsfww Sqsfx Amtod Please do not hesitate to contact us.

Condition: new, Year of construction: 2026, Aluminium Circular Saw UK 600 HA 90°, Semi-Automatic The semi-automatic circular saw UK 600 HA 90° is an upcut machine, primarily used for cutting profile materials made of cast aluminium, copper, and hard plastics (limited suitability for solid material). The machine is characterized by its easy operation and quick, convenient material changes. This model only allows for 90° cuts! The saw feed operates automatically at the press of a button, and material clamping is achieved via two pneumatically controlled vertical and two horizontal clamping cylinders. Standard features include a minimum quantity lubrication system and an air spray gun for machine cleaning. This machine is equipped with connections for a chip extraction system. Additionally, it can be optionally fitted with a digital mitre angle display, a layout laser, and pneumatic lifting for the protective hood. Equipment: - Large support table, high-performance drive motor - Two-button control for initiating the sawing process (optional single-button control available) - Intuitive control panel - Two vertical and two horizontal pneumatic clamping cylinders - Hydro-pneumatic saw blade lifting with oil level indicator - Fixed material back jaw can be moved rearwards to increase cutting capacity - Large protective hood covers the entire working area Lodpfx Aspa Nxdomtsad - Minimum quantity lubrication system with 2-litre reservoir - Adjustable saw blade feed speed - Air gun for machine cleaning - Saw blade diameter: 600 mm Work Sequence: 1. Set the cutting angle 2. Insert the material 3. Adjust lift speed 4. Bring clamping cylinders up to 20 mm from the material 5. Clamp the material 6. Press the start button – the machine is ready for operation 7. Press and hold both SAW buttons to initiate cutting 8. After cycle completion, release SAW buttons and press the STOP button 9. Open the clamping fixture and remove or advance the material For technical data such as cutting range, performance, etc., please refer to the data sheet in the email attachment. We look forward to your inquiry! Plantec Maschinen GmbH

Condition: new, Year of construction: 2026, Aluminum circular saw UK 650 HA, semi-automatic The UK 650 HA semi-automatic circular saw is an "upcut" machine and is used predominantly Used to cut profile materials made of cast aluminum, copper and hard plastics (limited solid material). The machine is characterized by easy handling and fast Lajdpfx Asidun Djmtjd easy changing of the material as well as easy adjustment of the miter angle. The UK 650 HA has an infinitely adjustable miter range left and right up to 20° (pivoting range twice 70°). The saw feed takes place independently at the push of a button, the material is clamped takes place via two pneumatically controlled vertical and horizontal clamping cylinders. By default this machine includes a minimum lubrication system and an air spray gun for cleaning the machine! Connections for a chip extraction system are available on this machine. Of Furthermore, this machine can optionally be equipped with a digital miter angle display, a marking laser and pneumatics to lift the protective hood! equipment Double miter 20° - 90° - 20°, large support plate, powerful drive motor Two-button control for triggering the saw cut (optionally also available as a one-button control) Clear control panel Sheet or cutting feed adjustable Two vertical and two horizontal pneumatic clamping cylinders Hydropneumatic lifting of the saw blade, with oil level indicator Fixed material feed jaw can be used to enlarge the cutting performance can be shifted backwards large protective hood, covers the entire work area Minimum lubrication system with 2 liter reservoir Air gun to clean the machine Saw blade ø 650 mm workflow 1. Setting the cutting angle 2. Inserting the material 3. Adjusting the lifting speed 4. Bring the clamping cylinder up to 20 mm on the material 5. Clamp the material 6. By pressing the Start button, the machine is ready for use. 7. Press and hold the two SAWS keys, das Material is sawn. 8. When the cycle is complete, release both SAW buttons and the Press the STOP button 9. Open the vice and remove or push the material further It is always possible for you to inspect the desired system in our production/demonstration hall. Please do not hesitate to contact us.

Condition: new, Year of construction: 2026, The semi-automatic circular saw UK 352 HA is an “upcut” machine and is primarily used for cutting profile materials made of aluminum castings, copper, and hard plastics (partially solid materials). The machine is characterized by its ease of use, quick and convenient material changes, and simple miter angle adjustment. The UK 352 HA has a continuously adjustable miter range of up to 45° to the left and up to 0° to the right. The saw feed is automatically activated by pressing a button, and the material is clamped using two pneumatically controlled vertical clamping cylinders. A minimal lubrication system and an air spray gun for cleaning the machine are included as standard with this machine! Connections for a chip extraction system are also available on this machine. Equipment: • Precision under-table circular saw Ledpfegwt Rrex Amtoad • Miter adjustment: left 45º / 90º / right -45º • Incl. 2 pneumatic clamping cylinders (vertical) • Saw blade feed continuously adjustable • Two-hand safety control • Adjustable material stop (rear) • Extraction device - chip extraction system • Mist spray device for air-oil cooling • Air gun with spiral hose • Incl. maintenance unit with pressure reducer • Ergonomically arranged control panel • Max. cutting height 125 mm • Saw blade 350mm • Saw blade not included! You can visit our production facility/showroom at any time to view the desired system. Please feel free to contact us for this purpose. We look forward to hearing from you! Plantec Maschinen GmbH

Condition: new, Year of construction: 2026, The UK-400-A semi-automatic circular saw is an "upcut" machine and is mainly used to cut profile materials made of cast aluminium, copper and hard plastics (requires solid material). The machine is characterized by easy handling and fast, convenient changing of the material as well as simple adjustment of the miter angle. The UK-400 A has an infinitely adjustable miter range left and right up to 20° (swivel range twice 70°). The saw feed takes place independently at the push of a button, the material is clamped via two pneumatically controlled vertical and horizontal clamping cylinders. This machine comes standard with a minimum lubrication system and an air spray gun for cleaning the machine! Connections for a chip extraction system are available on this machine. Furthermore, this machine can optionally be equipped with a digital miter angle display, a marking laser and pneumatics for lifting the protective hood! Furnishing Laodpfogwt Rnsx Amted • Precision underfloor circular saw • Miter adjustment 0º/ 45º/ 90º/ -45º / -60º continuously • incl. 2 pneumatic vices (vertical) • Infinitely adjustable saw blade feed • Two-hand safety control • Adjustable material stop (rear) • Suction device-swarf extraction system • Mist spray device for air-oil cooling • Air gun with spiral hose • incl. maintenance unit with pressure reducer • Ergonomically arranged control panel • maximum cutting height 130mm • Saw blade 400mm • Saw blade not included! It is always possible for you to inspect the desired system in our production/demonstration hall. Please do not hesitate to contact us.

Condition: new, Year of construction: 2026, The semi-automatic circular saw UK 352 HA is an "upcut" machine and is mainly used to cut profile materials made of cast aluminium, copper and hard plastics (requires solid material). The machine is characterized by easy handling and fast, convenient changing of the material as well as simple adjustment of the miter angle. The UK 352 HA has an infinitely adjustable miter range of up to 45° on the left and 0° on the right. The saw feed takes place automatically at the push of a button, the material is clamped using two pneumatically controlled vertical clamping cylinders. This machine comes standard with a minimum lubrication system and an air spray gun for cleaning the machine! Connections for a chip extraction system are available on this machine. Furnishing • Precision underfloor circular saw • Miter adjustment left 45º / 90º / right-45º degrees • incl. 2 pneumatic vices (vertical) • Infinitely adjustable saw blade feed • Two-hand safety control • Adjustable material stop (rear) • Suction device-swarf extraction system • Mist spray device for air-oil cooling • Air gun with spiral hose • incl. maintenance unit with pressure reducer • Ergonomically arranged control panel Lasdpfjgwt Ryex Amtod • maximum cutting height 125 mm • Saw blade 350mm • Saw blade not included!

Condition: new, Year of construction: 2026, pressure: 6 bar, The UK-600-A semi-automatic circular saw is an "upcut" machine and is mainly used to cut profile materials made of cast aluminium, copper and hard plastics (requires solid material). The machine is characterized by easy handling and fast, convenient changing of the material as well as simple adjustment of the miter angle. The UK-600 A has an infinitely adjustable miter range left and right up to 20° (swivel range two times 70°). The saw feed takes place independently at the push of a button, the material is clamped via two pneumatically controlled vertical and horizontal clamping cylinders. This machine comes standard with a minimum lubrication system and an air spray gun for cleaning the machine! Connections for a chip extraction system are available on this machine. Furthermore, this machine can optionally be equipped with a digital miter angle display, a marking laser and pneumatics for lifting the protective hood! Lodpfogcbwgox Amtjad

Condition: new, Year of construction: 2026, The UK 500 HA semi-automatic circular saw is an "upcut" machine and is mainly used to cut profile materials made of cast aluminium, copper and hard plastics (requires solid material). The machine is characterized by easy handling and fast, convenient changing of the material as well as simple adjustment of the miter angle. The UK 500 HA has an infinitely adjustable miter range of up to 30° on the left and 0° on the right. The saw feed takes place independently at the push of a button, the material is clamped via two pneumatically controlled vertical and horizontal clamping cylinders. This machine comes standard with a minimum lubrication system and an air spray gun for cleaning the machine! Connections for a chip extraction system are available on this machine. Furnishing • Precision underfloor circular saw • Miter adjustment 0º/ 45º/ 90º/ -45º / -60º continuously • incl. 2 pneumatic vices (vertical) • Infinitely adjustable saw blade feed • Two-hand safety control • Adjustable material stop (rear) Laodpfogwt R Djx Amtjd • Suction device-swarf extraction system • Mist spray device for air-oil cooling • Air gun with spiral hose • incl. maintenance unit with pressure reducer • Ergonomically arranged control panel • maximum cutting height 180 mm • Saw blade 500mm • Saw blade not included! It is always possible for you to inspect the desired system in our production/demonstration hall. Please do not hesitate to contact us.

Condition: like new (used), Year of construction: 2018, functionality: fully functional, saw blade diameter: 450 mm, cutting height (max.): 150 mm, warranty duration: 6 months, Equipment: rotational speed infinitely variable, Kaltenbach KKS 450E – very neat used machine from 2018 with 6 months warranty. Extra options: * Micro-dosing system & wet cooling * Horizontal (hydraulic) clamping cylinder 1 x The KKS 450E is a semi-automatic mitre saw for ferrous and non-ferrous metals such as: steel, stainless steel, chrome steel, brass, copper, bronze, etc. Benefits at a glance: - Clamping, sawing, reversing and releasing – all with a single lever - Saw height adjustable via a lever - User-friendly mechanical controls mounted directly on the machine - Excellent accessibility for saw blade changes and maintenance - Workpiece clamping device on both sides of the saw blade - Two cutting speeds for virtually all applications - Ergonomically positioned controls for user comfort - Adjustable sawing stroke limitation and rapid saw blade return All pre-owned Kaltenbach machines are supplied with a 6-month warranty as standard. Transport and installation available throughout the Benelux. Laedpfxeyr S Szs Amtod

Condition: new, Year of construction: 2026, Aluminum circular saw BC 450 HA, semi-automatic (MG FRONT-450) The BC 450 HA is a double miter saw with a swivel range of 45° to the left and 22.5° to the right and an automatic mitre adjustment via stop functions. The saw stroke runs automatically and the material is clamped pneumatically. The saw blade (450 x 30 mm) runs horizontally. can also be optionally equipped with a digital mitre angle display, a scribing laser and pneumatics for lifting the protective hood! Equipment Double mitre machine with powerful drive motor Two-button control for triggering the saw cut (optionally also available as one-button control) Lasdpfxspa Nxaj Amted Large mitre range from -22.5° to +45°, Swivel range 67.5° - 0° - 45° Automatic miter adjustment, fixed stop functions at -45° / 90° / +45° and two variable stop functions adjustable to the desired angle! Two horizontal pneumatic clamping cylinders Clearly arranged control panel Large protective hood covers the entire working area, is lifted pneumatically Adjustable blade and cutting feed Connections for extraction system Minimal lubrication system Air gun for cleaning the machine Saw blade ø 450 mm Work sequence 1. setting the cutting angle 2. inserting the material 3. adjusting the stroke speed 4. bring the clamping cylinder to within 20 mm of the material 5. clamp the material 6. press the The machine is ready for operation by pressing the start button. 7. press and hold the two SAW buttons, the material is sawn. 8. 8. at the end of the cycle, release both SAW buttons and press the STOP button 9. 9. open the clamping vice and remove or advance the material Plantec Maschinen GmbH

Condition: new, Year of construction: 2026, Aluminum circular saw UK 800 HA, semi-automatic The UK 800 HA semi-automatic circular saw is an "upcut" machine and is used predominantly Used to cut profile materials made of cast aluminum, copper and hard plastics (limited solid material). The machine is characterized by easy handling and fast easy changing of the material as well as easy adjustment of the miter angle. The UK 800 HA has an infinitely adjustable miter range left and right up to 20° (pivoting range twice 70°). The saw feed takes place independently at the push of a button, the material is clamped takes place via two pneumatically controlled vertical and horizontal clamping cylinders. By default this machine includes a minimum lubrication system and an air spray gun for cleaning the machine! Connections for a chip extraction system are available on this machine. Of Furthermore, this machine can optionally be equipped with a digital miter angle display, a marking laser and pneumatics to lift the protective hood! Lajdpfx Ajidun Ismted equipment Double miter 20° - 90° - 20°, large support plate, powerful drive motor Two-button control for triggering the saw cut (optionally also available as a one-button control) Clear control panel Sheet or cutting feed adjustable Two vertical and two horizontal pneumatic clamping cylinders Hydropneumatic lifting of the saw blade, with oil level indicator Fixed material feed jaw can be used to enlarge the cutting performance can be shifted backwards large protective hood, covers the entire work area Minimum lubrication system with 2 liter reservoir Air gun to clean the machine Saw blade ø 800 mm workflow 1. Setting the cutting angle 2. Inserting the material 3. Adjusting the lifting speed 4. Bring the clamping cylinder up to 20 mm on the material 5. Clamp the material 6. By pressing the Start button, the machine is ready for use. 7. Press and hold the two SAWS keys, das Material is sawn. 8. When the cycle is complete, release both SAW buttons and the Press the STOP button 9. Open the vice and remove or push the material further It is always possible for you to inspect the desired system in our production/demonstration hall. Please do not hesitate to contact us.

Condition: new, Year of construction: 2026, The semi-automatic circular saw UK 352 HA is an "upcut" machine and is mainly used to cut profile materials made of cast aluminium, copper and hard plastics (requires solid material). The machine is characterized by easy handling and fast, convenient changing of the material as well as simple adjustment of the miter angle. The UK 352 HA has an infinitely adjustable miter range of up to 45° on the left and 0° on the right. The saw feed takes place automatically at the push of a button, the material is clamped using two pneumatically controlled vertical clamping cylinders. This machine comes standard with a minimum lubrication system and an air spray gun for cleaning the machine! Connections for a chip extraction system are available on this machine. Lasdpfjgwt Rvsx Amtsd

Year of construction: 1970, condition: good (used), machine/vehicle number: 1258, disk of circular saw-Ø: 315 mm cutting area at 90° round: 90 mm cutting area at 90° square: 80 x 80 mm cutting speeds: 12,5 - 25 m/min forward feed speeds: hydropneumat. stufenl. regelbar cutting length: 5 - 1580 mm saw drive: 380 V, 1,8/2,5 kW Lasdpfx Amoh I Dvnetjd space needed: 2300 x 1000 x 2800 mm weight: 940 kg

Condition: used, disk of circular saw-Ø: bis 250 mm cutting area at 90° round: ca. 7 5 mm cutting length: 500 mm Lsdpfxob N Ehds Amtsad electrical connection: 380 V sawing drive: 0,75/1,1 kW space needed: 1700/2100 x 900 x 1440 mm weight: 355 kg

Year of construction: 1988, condition: used, machine/vehicle number: 109357, disk of circular saw-Ø: 400 mm cutting area at 90° round: 130 mm cutting area at 90° square: 240 x 85 mm cutting area in mitre at 45° square: profiles flat 180 x 70 mm cutting speeds: 10/20 m/min forward feed speeds: 0 - 1000 mm/min electrical connection: 400 V, 1,7/2,6 V Laedpeb Sciaofx Amtjd space needed: 2750 x 1500 x 1900 mm weight: 1350 kg

Condition: used, disk of circular saw-Ø: bis 250 mm Lodpfx Amsbbbhnetead cutting area at 90° round: ca. 7 5 mm cutting length: 500 mm electrical connection: 380 V sawing drive: 0,75/1,1 kW space needed: 1700/2100 x 900 x 1440 mm weight: 355 kg

Year of construction: 1988, condition: used, machine/vehicle number: 103.071.3156.78192, disk of circular saw-Ø: 400 u. 425 mm cutting area at 90° round: 130 mm cutting area at 90° square: 120 x 120 mm cutting area in mitre at 45° round: 130 mm cutting area in mitre at 45° square: 110 x 110 mm cutting speeds: 11 u. 22 m/min forward feed speeds: 670 mm/min cutting length: m. automat. Vorschub bis 1200 mm electrical connection: 380 V, ca. 4 kVA V sawing drive: 1,6/2,5 kW space needed: 1800 x 3800 x 2000 mm Lsdpfx Asz N Amomtsad weight: ca. 1800 kg

Condition: used, Year of construction: 2005, saw blade diameter 450 mm cutting diameter 150 mm stroke 1300 mm Lsdpfx Amsyutvgetjad cutting range 140x140 mm Roller conveyor 6000x350 Roller conveyor 4500x700 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

Year of construction: 2001, condition: good (used), machine/vehicle number: 129603-40-6, Technical data: - Saw blade dimensions: 300 x 3.4 x 32 mm - Saw blade speed: U/min - Cutting range: - at 90° (round): 90 mm - or (square): 80 mm - Pneumatic clamping cylinders - Material feed system with positioning control Lasdpfjd Aai Tox Amtjd - Single stroke up to approx. 1000 mm - Multiple strokes - Swiveling arm with control panel and CNC control MEP - Motorized dust extraction and chip extraction, mobile unit - Drive: 400 V / 1.1 kW - Space required: approx. W 2750 x H 1800 x D 2000 mm - Weight: approx. 600 kg

Condition: good (used), Year of construction: 1984, machine/vehicle number: 102335, Offer 23172 Technical data: Laedpormkl Aofx Amtjd - Saw blade diameter up to 400 mm - Cutting range with saw blade diameter 400 mm - at 90° round 130 mm - square 120 mm - flat up to 260 x 60 mm - Mitre adjustment left + right 0 - 90 ° - Cutting speed 1750 / 3500 m/min - Feed speed of the saw blade 0 - 3 m/min - Rapid return 3000 mm/min - Saw drive 400 V / 3.7 / 4.4 kW - Pneum. Material vice with adjustable clamping pressure - Space requirement approx. W 1200 x H 1900 x D 1200 mm - Weight approx. 600 kg - Outfeed roller conveyor 3000 mm - Infeed roller conveyor 3000 mm