Used Twist Drill Grinding Machine for sale (83,524)

Condition: used, Year of construction: 1982, drill diameter 3-40 mm drilling length 500 mm lip angle 15 - 75 ° Fjdpfx Aowntzwefnopb total power requirement 4,1 kW weight of the machine ca. 1,5 t dimensions of the machine ca. 1,80x1,60x1,40 m

Condition: new, Year of construction: 2025, operating hours: 1 h, Standard equipment red line Optical precisions drill point grinding machine for 2 fluted drills regrinding and point splitting in one chucking diameter range 2 to 16 mm (1 to 20 mm as option) point angle 80° - 150° infinitely adjustable cutting angle 0° - 20° infinitely adjustable relief angle set to 30° incl. complete electrical instalation with single phase electrical motor 0,3KW 115V 60Hz (or 220V 50Hz) and integrated power-supply for illumination of the optical system incl. built-in optical projection system with 10 power lens (zoom lens with 6 - 20 power as option) incl. integrated point splitting device incl. one precision collet holder and one set of double-tapered precision-collets of your choice (MP 16 for drill-dia. 3-16 mm, MP 6,5 for drill-dia. 1-6.5 mm or MP 20 for drill-dia. 6.5-20 mm) Fpjdobrpr Uspfx Afnjb incl. 1 double sided grinding wheel dia. 125mm CBN (one side coarse [grit ~100] second side medium [grit ~200]) incl. wheel guard with connection system for vacum cleaner incl. 1 each of detailed operating manual with pictures, spare parts list, CD-Rom and CE-Declaration (on demand)

Condition: new, Year of construction: 2016, Specifications: Model SA-1300 Point angle infinitely variable for Ø 2-6 mm from: 118° to 135°. Point angle infinitely variable for Ø 6-13 mm from: 90° to 144°. Collet set for drill diameter: 3 to 13mm Collet type: ER 20 CBN grinding wheel (for HSS drills): Ø 78mm Fodjrfb Sepfx Afnopb optional diamond grinding wheel (for carbide): Ø 78mm motor: 120Watt spindle speed: 5300 1/min Electrical connection: 220Volt/ 50HZ Weight: 10 KG Documentation: detailed instruction manual and machine documents in German language Remarks: The drill grinding machine SA-1300 is designed for grinding (sharpening) and pointing of 2-flute drills made of HSS or carbide*, in the diameter range from 3 mm to 13 mm. *Carbide drills only with optional diamond grinding wheel. Spare parts, as well as replacement grinding wheels are available from stock.

Condition: ready for operation (used), Year of construction: 1981, drill diameter 50 mm Fedowu Hklopfx Afnepb total power requirement 2,2 kW weight of the machine ca. 0,6 t

Condition: good (used), Year of construction: 1983, Stock number: 2965-3 Manufacturer: WEDEVAG Year of manufacture: 1983 Machine number: 000115/83 Type / Model: WL 2 Grinding wheels: 203 x 10 x 32 mm Point angle: 60 to 180° Diameter: 2.5 to 20 mm Speed: 2,800 rpm Dirty air requirement: approx. 5 bar Equipment: Base cabinet with extraction system Extraction system: SKF Tools Fpodpfxev U Agko Afnsb Type: ADT 12 Floor area: 500 x 600 mm Table height: 500 mm Accessories/equipment: Condition: Good Complete weight: 170 kg Dimensions: 500 x 600 x 1,400 mm

Condition: new, Bernardo drill grinding machine DG 32 Pro Specifications Drill diameter 2 - 32 mm point angle 90° - 135 Speed 4800 rpm Motor power 0,25 kW Voltage 230 V length 350 mm width 210 mm height 305 mm Fodpfx Afjgd H U Ujnopb Weight approx. 32 kg Scope of delivery - Diamond grinding wheel SBC - Collets ER 20, 3 - 12 mm, 10 pcs. (3 / 4 / 5 / 6 / 7 / 8 / 9 / 10 / 11 / 12 mm) - Collets ER 40, 13 - 32 mm, 20 pcs (13 / 14 / 15 / 16 / 17 / 18 / 19 / 20 / 21 / 22 / 23 / 24 / 25 / 26 / 27 / 28 / 29 / 30 / 31 / 32 mm) - Collet holder ER 20 resp. ER 40 Features - Including device for pointing, i.e. better centering of the drill tip on the workpiece and reduction of the necessary feed force - 30 pcs. ER collets included in the scope of delivery, which are also suitable for clamping intermediate sizes - Additional station for relief grinding of the drill cutting edges (clearance angle) - Universally adjustable point angle from 90° - 135 - Rotor with precision ball bearing ensures very smooth operation - Fast and precise working results due to simple operation - Vibration-free running due to high dead weight and rubber feet

Condition: used, Year of construction: 1997, functionality: fully functional, Data Sheet – Meteor MM 10-US Description: Grinding center for small tools and micro-tools. Model: Meteor MM 10-US Applications: Sharpening of right-handed and left-handed precision tools Sharpening of drill bits (diameter 0.2 - 12 mm) Production of various engraving tools Sharpening of boring tools, single- and multi-flute cutters and radius cutters Technical specifications: Sharpening range: 1-12 mm for tools with collet; 0.3-10 mm for drills with chuck and collets Grinding spindle: axially adjustable Side stops: with fine adjustment AC motor: 120 W Electrodynamic braking system Integrated electronic board Dustproof control panel Machine lighting: 24 V halogen lamp Grinding wheel: Carborundum K 250 Grinding wheel dressing device Dust protection cover Additional specifications: Colour: Green-grey Fpodpfx Afjvyzfvensb Power supply: 230 V / 50 Hz Safety compliance: CE / STR standards tested

Condition: new, Year of construction: 2025, operating hours: 1 h, for drills (HSS and solid carbide)diameter 7 – 20 mm (option ø 3 – 8 mm and ø 20 – 30 mm) with 90° – 140° tip angle fast, easy, precise, economical Fpsdpfxebrptvj Afneb Specifications for EASY-POINT-GRINDER EPG-1 Tip-angle step less adjustable between 90° – 140° Standard collet-set for drills diameter 7 – 20 mm Optional collet-set for drills diameter 3 – 8 mm Optional collet-set for drills diameter 20 – 30 mm CBN-grinding wheel for HSS drills Ø 118 mm Opt. DIAMOND-grinding wheel for carbide drills Ø 118 mm Brush-less electrical motor 250 Watt Spindle speed 2900 RPM Electrical input specifications 230 Volt 50 Hz Weight ca. 22 Kg / 45 lbs Re-sharpen your drills according to your materials and your machining conditions!

Year of construction: 2016, condition: new, Technical data: Model SA-2500 Point angle infinitely variable from: 90°-144° Collet set for drill diameter: 13-26 mm Collet type: ER 40 CBN grinding wheel (for HSS drills): Ø 90 mm optional diamond grinding wheel (for carbide): Ø 90 mm motor: 180 Watt Fpsdpfxerfb Te Afnob spindle speed: 5300 rpm Electrical connection: 230 Volt 50HZ Weight: 26KG Documentation: detailed instruction manual and machine documents in German language Remarks: The drill grinding machine SA-2500 is designed for grinding (sharpening) and pointing of 2-flute drills made of HSS or carbide*, in the diameter range from 13 mm to 26 mm. *Carbide drills only with optional diamond grinding wheel. Spare parts, as well as replacement grinding wheels are available from stock.

Condition: new, Year of construction: 2025, machine/vehicle number: 2024, Optical precision drill grinding High-precision and very easy-drill grinding with optics and , Costsaver and Swiss in 100% quality. grind drills, thinning and check in the shortest time and with maximum precision. With MEGA POINT blue line you win more than once, achieve with it: - Better positioning - Improved accuracy of diameter - Significantly longer service life - Feed force is greatly reduced The MEGA POINT blue line is a versatile precision drill grinding machine, which is easy and ergonomic operation and a variety of drills handelsueblichen nachschleift perfect and optimized. MEGA POINT blue-line 1-20mm (Optiom to 30mm) Technical specifications: Our MEGA POINT drill grinding allows precise and rapid regrinding and thinning all handelsueblichen drills. Our customers have so always perfectly ground drills for disposal. The sophisticated design provides enormous flexibility in terms of the different cut angles and the thinning of the drill. Without a doubt, the world's best conventional drill grinding! Technical specifications Drill material grinding HSS and carbide HSCO Point angle adjustable 80 ° - 150 ° optional tip angle adjustable up to 180 ° Chuck with collets for drill diameters from 1 to 6.5 mm Chuck with collets for drill diameter 7 - 20 mm optional Spannzangenset for drill diameter 20 - 30 mm Average / free angle adjustable 0 - 40 ° Ausspitzvorrichtung, Ausspitztiefe adjustable CBN grinding wheel double-fine / coarse D 125 mm optional DIAMOND grinding wheel (for carbide drills) D 125 mm CBN grinding wheel for thinning D 50 mm x 4 mm Engine power 0.3 kW Spindle speed 2800 r / min Power supply 230 volt 50 Hz Dimensions (L x W x H) 50 x 50 x 50 cm Weight about 42 kg Standardausfuehrung For right- and left-cutting, two- and dreilippige drills. With built-in optics (10x Zoom) separate Ausspitzvorrichtung and: 1 Machine light 2 chucks with collets D 1 -6.5 mm and D 7 - 20 mm 1 CBNDoppel grinding wheel D 125 mm fine / coarse 1 CBNSchleifscheibe D 50 x 4 mm 1 Set of service tools 1 instruction manual with spare parts list 1 CD-ROM with manual (CE Declaration) Danger: OPTIMA / TATAR Parts Fpsde R R R Sepfx Afnsb BERGER technology will take over on January 1, 2016, the stock of spare parts of HighTech OPTIMA AG. We can now offer genuine spare parts and service for the OPTIMA and TARTAR Boherschleifmaschinen.

Year of construction: 1984, condition: used, gr. grinding Ø: 40 mm small grinding Ø: 5 mm weight: 0,9 t 2 grinding wheels with flange 8 collets Fpsdpfx Afscq Rv Ueneb 1 coolant tank mechanical feed with fixed stop The cardan shaft for the workpiece drive is worn out

Condition: like new (used), Year of construction: 2004, Fully refurbished. BENTELER Grinding, Milling, and Washing Line is a comprehensive glass processing system designed to handle large glass sheets up to 3300 x 6000 mm. This integrated line combines grinding, drilling, milling, and washing operations to streamline production and enhance efficiency. By linking these processes, the system minimizes manual handling and reduces cycle times, ensuring precise and high-quality glass processing. Photos show before/after refurbishing. Fpjdju Su Ncopfx Afneb Like new condition

Condition: used, Drills Grinding Machine DECKEL SOE Spindle speed: 4500 RPM Maxi bore of clamps: 17,5 mm Maxi sharpenable radius: 10 mm Maxi lateral displacement: 10 mm Angle adjustment: 45° Maxi displacement: 100 mm (see technical details) Delivred with 1 set of clamps + different diamond grinding wheels Fpsdpfxoxp Nypo Afnsb Voltage: 380 V Width: 600 mm Depth: 600 mm Total height: 1300 mm Weight: approx 150 kg

Year of construction: 1998, condition: good (used), CHEVALIER FSG 1640 AD SURFACE GRINDING MACHINE MAKE CHEVALIER, MADE IN TAIWAN MODEL FSG-1640 AD YEAR 1998 TABLE SIZE 1000 x 400 mm GRINDING WHEEL SIZE 445 mm TRAVERSES 400 x 1000 mm MAX HEIGHT FROM TABLE TO SPINDLE CENTRE 445.0 mm TOTAL POWER REQUIRMENT 7.4 kW Fedpsirfpgofx Afnjpb PLUS AUTOMATIC DOWN FEED WHEEL-MOUNTED WHEEL DRESSER SYSTEM HYDRAULIC MOVEMENT COOLANT SYSTEM 400.0 x 1000.0 mm ELECTRO MAGNETIC CHUCK MACHINE MANUALS

Condition: good (used), Year of construction: 2015, operating hours: 250 h, functionality: fully functional, For Sale: Guideway Grinding Machine (Retrofitted from Metal Planing Machine) We offer a robust guideway grinding machine, which has been professionally converted from an original metal planing machine. The main advantage lies in its relatively compact footprint in relation to the workpiece capacity. Technical Specifications: • External dimensions (LxWxH): 4,800 x 2,500 x 2,000 mm • Required floor space: 4,800 x 3,500 x 2,700 mm (+ control cabinet, coolant tank, access) • Table size: 2,000 x 800 mm Fpjdsxx Uudspfx Afnob • Distance between columns: 1,000 mm • Travel paths (X/Y/Z): 2,000 / 1,000 / 600 mm Upgrades & Features: • New ball screw spindles and bearings • 2 new motors + 2 overhauled motors • 3 new frequency inverters • New Siemens SINUMERIK 802C baseline CNC system • Large grinding spindle: 2,840 rpm – refurbished + new motor • Small grinding spindle: 18,000 rpm – refurbished • Including control cabinet, coolant tank with pump, and separate, wall-mounted inverter for small spindle Inspection and trial run possible by appointment. Please contact us for more information.

Condition: excellent (used), Year of construction: 2016, XYZ 1020 Surface Grinding Machine Mag’ Chuck 250 x 500mm Spindle Speeds 3000rpm Spindle Motor 2Hp Standard Grinding Wheel Dia. 180mm Standard Wheel Bore 31.75mm Max. Longitudinal Grinding Travel- 500mm Max. Cross Grinding Travel - 250mm Max. Distance from Table Surface to Spindle Centre - 500mm Max. Longitudinal Travel – 558mm Fpedjx S Ru Aopfx Afneb Longitudinal Travel Speed Range 5-25m/min Cross Travel Increments 0.15 – 15mm Cross Feed per Handwheel Revolution 4mm Cross Feed per Handwheel Graduation – 0.02mm Down Feed Per Handwheel Revolution 2mm Down Feed Per Handwheel Graduation 0.01mm *For sale with Jet Machinery Ltd* Jet Machinery Stock No: #79111 Machine Serial Number: 1624045 Cost: £11,950.00 + VAT Whilst every effort has been made to ensure that the above information is accurate it is not guaranteed. We advise prospective purchasers to check any vital details. Health and Safety At Work Act 1974: It is not reasonably practical for ourselves as suppliers to ensure that for your application the goods comply with requirements of the Act with respect to guarding etc. Prospective purchasers should ensure that a guarding specialist inspect the goods prior to use.

Condition: used, Tube End Forming Machine, T-Drill SP-110, Used Machine Manufacturer: T-Drill Model: SP-110 Operation: Uncertain Overall Dimensions: Fpsdpfx Aoxu E Duefnjb Width: 930 mm Depth: 1520 mm Height: 1460 mm Weight: 600 kg Year of Manufacture: 2016 Air Pressure: 6 bar Electrical Data: 480V; 18.5 kW; 3x80A The T-DRILL SP-110 is a fully automatic tube end spinning machine capable of closing, reducing, and expanding primarily copper and brass tubes — typical applications include HVAC, refrigeration, and mechanical fittings. Technical Data (Summary): Tube diameter range: Ø 8 – 108 mm (≈ 5/16” – 4-1/8” O.D.) – T-Drill Oy Maximum reduction: 70% – T-Drill Oy Materials: primarily copper and brass (as highlighted in the manufacturer’s description) – T-Drill Oy Wall thickness / maximum wall thickness (according to used machine listings): e.g., one listing indicates 0.125" (≈3.2 mm) maximum wall thickness (depends on model/configuration) – Southern Fab Sales Machine features: automatic clamping, rotation + forming tools (tooling/dies), suitable for forming long or complex tube ends. Capable of closing, flattening, reducing, and expanding tube end geometries; the manufacturer’s brochure contains detailed shapes and examples. Especially suitable for HVAC and industrial refrigeration tubes.

Condition: new, Year of construction: 2025, A superfine ball mill is a type of milling machine that is used to grind materials into very fine particles. This type of ball mill has some distinctive features that make it especially suitable for processing even the hardest materials with low contamination and minimal wear. It is commonly used in various industries, including pharmaceuticals, minerals, pigments, and chemicals, for producing micro powder or nanoparticles. Here are some key features and considerations for a superfine ball mill for micro powder: 1. High Grinding Efficiency: Superfine ball mills are designed to achieve high grinding efficiency by utilizing grinding media with a relatively small size, leading to a large surface area for grinding. 2. Precision Control: These mills often come with advanced control systems to regulate parameters like rotation speed, temperature, and grinding time, allowing precise control over the particle size distribution. 3. Specialized Design: The mill is typically designed with features to minimize contamination, such as using materials resistant to wear and corrosion. Some mills also have cooling systems to prevent overheating during the milling process. 4. Variety of Materials: Superfine ball mills can handle a wide range of materials, including both brittle and fibrous substances. They are often used for milling hard materials that require fine grinding, such as ceramics, minerals, or pigments. 5. Size Reduction to Micro or Nano Level: The primary goal of a superfine ball mill is to reduce particle size to the micro or even nano level. This is achieved by the intense grinding action that occurs within the mill. 6. Classifier System: Some superfine ball mills incorporate a classifier system to control the particle size distribution more precisely. This allows for the separation of fine particles from coarser ones during the milling process. Fpjdpfx Afsq Nf Uwoneb 7. Batch or Continuous Operation: Depending on the specific design, these mills can operate in either batch or continuous mode, offering flexibility based on the production requirements. 8. Safety Measures: Safety features may be included, such as monitoring and control systems to prevent overloading, overheating, or other potential issues during operation. When selecting a superfine ball mill for micro powder production, it's important to consider the specific requirements of your application, the characteristics of the materials you're working with, and the desired final particle size distribution. Always follow the manufacturer's guidelines for operation, maintenance, and safety to ensure optimal performance and longevity of the equipment.

Condition: excellent (used), Year of construction: 1988, operating hours: 1,000 h, functionality: limited functionality, machine/vehicle number: 99223, overall weight: 2,800 kg, Grinding Dia: min=0.8 to max 250 mm; Vertical stoke : 90 mm; Max. travel of the grinding head :300 mm Table size :320x600 mm; Max stroke of the table Tranversal 250 mm, Longitudinal 400 mm; Electric motor speed 80000 rpm, Pneumatic 180000 rpm. Dimensions 1585x1260x2665 mm, Weight: 2800 kg Fpedexvccdepfx Afnob

Condition: excellent (used), Year of construction: 2010, functionality: fully functional, machine/vehicle number: MGB1320E, center height: 180 mm, workpiece weight (max.): 100 kg, grinding length: 500 mm, grinding wheel diameter: 400 mm, total width: 14,150 mm, total length: 18,000 mm, total height: 14,750 mm, grinding diameter: 320 mm, workpiece length between centers: 350 mm, grinding wheel width: 50 mm, spindle speed (max.): 3,000 rpm, feed length X-axis: 500 mm, feed length Z-axis: 150 mm, feed rate X-axis: 10 m/min, feed rate Z-axis: 1 m/min, overall weight: 2,100 kg, workpiece spindle speed (max.): 400 rpm, Equipment: rotational speed infinitely variable, Beijing Second Machine Tool Beijing Second Semi-automatic High Speed Cylindrical Grinding Machine MBS1320E On-line production equipment; test machine available; roundness within 0.001 beier machine tool works co ltd Online production equipment machine testing available The roundness within 0.001 Fjdpfx Astr Azkefnspb

Condition: new, Year of construction: 2024, functionality: fully functional, This powerful machine to meet the requirements of larger woodworking companies, ensuring exceptional sharpening results. Equipped with an electronic tooth counter and an autonomous cooling system. The ZM150 offers precise sharpening while maintainingoptimal operating conditions. With two electric motors, including a 150mm CBNdisk for sharpening and a motor reduction group for precise blade movement,this sharpener delivers outstanding performance. Power supply voltage - 380-400V Fsdpfxoxiv Uge Afnepb Frequency - 50Hz Power - 0.20kVa Capacity - 65 teeth per min Blade width - 20 to 100 mm Tooth pitch - 6 -25mm Sharpening disc - Profiled 150mm CBN disc Weight - 115kg

Condition: ready for operation (used), Year of construction: 2008, functionality: fully functional, travel distance X-axis: 3,000 mm, travel distance Y-axis: 6,000 mm, travel distance Z-axis: 1,250 mm, spindle speed (max.): 12,000 rpm, controller model: Heidenhain iTNC530 mit Handrad, Machine with 4th axis as a swivel axis & regularly serviced by the machine manufacturer! TECHNICAL DETAILS Working areas Fjdpfx Afoxvx U Aenjpb X-axis: 3,000 mm Y-axis: 6,000 mm Z-axis: 1,250 mm Milling head A-axis: controllable, tiltable Milling spindle Spindle power: 4.4 kW Spindle speed: 12,000 rpm Tool holder: 78/8 flange Tool clamping: manual with clamping nut Linear axis drives Feed rate X, Y, Z axes: up to 20 m/min Axis acceleration X, Y, Z axes: up to 1.5 m/s² MACHINE DETAILS Control: Heidenhain iTNC530 with handwheel Connected load: approx. 25 kW Main fuse: 42 A Dimensions & Weight Space requirement for machine: approx. 5,500 x 9,000 x 4,500 mm Total weight: 9,600 kg FEATURES Conversion to high-frequency spindle possible Important: Table and the wooden board shown in the photos are not included in the scope of delivery.

Condition: not inspected (used), Year of construction: 1987, functionality: unexamined, machine/vehicle number: 2023, travel distance X-axis: 900 mm, travel distance Y-axis: 600 mm, travel distance Z-axis: 180 mm, spindle speed (max.): 160,000 rpm, table load: 800 kg, No minimum price – guaranteed sale to the highest bidder! The machine is being auctioned due to a business closure. Bidding obligates the successful bidder to collect the machine within the specified timeframe from 26.01.2026 to 29.01.2026! TECHNICAL DETAILS Travel X-axis travel: 900 mm Y-axis travel: 600 mm W-axis travel: 635 mm Z-axis travel: 180 mm U-axis travel: 6/20 mm Distance between columns: 950 mm Clearance table to spindle: 735 mm Main spindle diameter: 100 mm Tool holder: E 23 E 19 EF 6 Work Table Table dimensions: 1,020 x 860 mm T-slot width: 14 mm T-slot spacing: 100 mm Table load capacity: max. 800 kg Taper grinding: max. 16° Digital readout X/Y: 0.001 mm Basic deviation X/Y at 20°: 0.004 mm Spindle speed: from 4,500 to 160,000 rpm Planetary movement (Z-axis): 5 to 250 C-axis NC drive: 0 – 5 Feed X and Y-axis feed: 0 to 1,500/3,000 mm/min W-axis feed: 800 mm/min Fsdjx Rw E Sjpfx Afnspb Z-axis feed: 0.5 – 12,000 mm/min MACHINE DETAILS Control: CNC 311 Electrical Data Operating voltage: 3 x 380 V Frequency: 50 Hz Control voltage: 110 V Connection rating: 8.5 kW Dimensions & Weight Dimensions (L x W x H): 5,000 x 2,000 x 3,300 mm Weight: 7,000 kg EQUIPMENT Matching workshop cabinet with contents Various grinding tools Clamping devices High-frequency grinding head BÜCHE ENF 4000 extraction unit

Condition: not inspected (used), functionality: unexamined, overall weight: 700 kg, grinding wheel diameter: 150 mm, jaw width: 70 mm, No minimum price – guaranteed sale to the highest bidder! The machine is being auctioned due to company closure. Submitting a bid commits you to timely collection between 26.01.2026 and 29.01.2026! TECHNICAL DETAILS Magnet dimensions: 500 x 200 mm Grinding wheel diameter: 150 mm Jaw width: 70 mm MACHINE DETAILS Fpodpfx Afexqb D Ajneb Dimensions & Weight Dimensions (L x W x H): 3,000 x 1,500 x 1,600 mm Weight: 700 kg EQUIPMENT Matching workbench with sine magnetic chuck Various grinding wheels Precision vise

Condition: not inspected (used), functionality: unexamined, machine/vehicle number: 6190, grinding wheel diameter: 150 mm, table length: 720 mm, table width: 200 mm, overall weight: 2,000 kg, No reserve price – guaranteed sale to the highest bidder! The machine is being auctioned due to business closure. Placing a bid obligates you to collect the machine on schedule between 26.01.2026 and 29.01.2026! TECHNICAL DETAILS Table dimensions: 720 x 200 mm Grinding wheel diameter: 150 mm MACHINE DETAILS Electrical data Operating voltage: 380 V Frequency: 50 Hz Rated current: 15 A Control voltage: 220 V Dimensions & Weight Dimensions (L x W x H): 3,500 x 2,000 x 1,700 mm Weight: 2,000 kg Fjdsxqg E Sjpfx Afnepb EQUIPMENT Magnetic chuck (450 x 200 mm) RSF three-axis digital readout BRAILLON magnetizing and demagnetizing station JUNG adjustable magnetic chuck (120 x 90 mm)