Used Machine Castles for sale (91,378)

Condition: as good as new (ex-display), Year of construction: 2025, Machine is in the exhibition and was only used for demonstration purposes. Optimill F 3 Pro CNC milling machine (training machine) directly from the manufacturer. F 3 PRO - The OPTIMUM CNC milling machine with Siemens control SINUMERIK 808D Advanced is characterized by performance, speed, precision and long service life. All linear guides with stainless steel covers Automatic central lubrication Servo drive from SIEMENS in all axes (open control loop) Max. Spindle speed 4000 min-1 Machine light in the work area Portable, electronic handwheel with enabling switch and emergency stop switch. Makes running in programs considerably easier Tools can be changed at the touch of a button Access doors very generously designed to reduce cleaning and maintenance time to a minimum Software package "SINUMERIK 808D on PC" included. (Practical training software so that workpieces can be programmed and simulated offline on the PC. Software can be downloaded free of charge at). Ljdpfjw Ea R Hsx Afijah SINUMERIK 808 ADVANCED - CNC technology from the technology leader, paired with a revolutionary operating concept The SINUMERIK 808D ADVANCED control is a panel-based CNC control. The compact and user-friendly entry-level solution is used for simple milling applications. Features such as simple operation, commissioning and maintenance are the perfect basis for equipping CNC machines. Compact and robust Thanks to a panel-based CNC design with few interfaces and a control panel in protection class IP65, the SINUMERIK 808D ADVANCED is perfectly prepared for use in harsh environments. The small dimensions allow it to be used in compact machines INCLUDED RJ45 Ethernet port 8.4" LCD color display with 800 x 600 resolution Prepared for remote maintenance Dimensions and weights Length approx. 1410 mm Width/depth approx. 1372 mm Height approx. 2007 mm Weight approx. 1000 kg Drilling/milling capacity Cutter head size max. 50 mm End mill size max. 25 mm Electrical data Supply voltage 400 V Mains frequency 50 Hz Electrical connection Total connected load 5 kVA Horizontal milling table Length 620 mm Width 180 mm Distance vertical spindle - milling table min. 50 mm Distance vertical spindle - milling table max. 295 mm T-slots size 12 mm Number of T-slots 3 T-slot spacing 50 mm Load max. 30 kg Accuracy Repeat accuracy ± 0.02 mm Positioning accuracy ± 0.01 mm Coolant system Coolant pump(s) Drive power 95 W Tank capacity 30 l Travel distance X-axis automatic 355 mm Y-axis automatic 190 mm Z-axis automatic 245 mm Vertical spindle Spindle holder BT 30 Speed range 4000 min¯¹ Explanation Speed range Please note that the maximum spindle speed must be reduced by approx. 20 % in continuous operation Power drive motor continuous operation S1 1.5 kW Power drive motor S6-30 % operation 2.2 kW Torque drive motor continuous operation S1 9.5 Nm Torque drive motor 30% operation S6 14 Nm Feed rate Speed X-axis 10000 mm/min Y-axis 10000 mm/min Z-axis 10000 mm/min Feed motor torque X-axis continuous operation S1 1.9 Nm Y-axis continuous operation S1 3.5 Nm Z-axis continuous operation S1 3.5 Nm

Condition: ready for operation (used), functionality: fully functional, machine/vehicle number: 70292, grinding length: 500 mm, grinding wheel diameter: 400 mm, grinding diameter: 200 mm, workpiece weight between centers: 15,000 g, bar passage: 270 mm, No reserve price – guaranteed sale to the highest bidder! The machine is being auctioned due to a business closure. Placing a bid obligates you to collect the machine within the specified period from 26.01.2026 to 29.01.2026! TECHNICAL DETAILS Grinding wheel diameter: 400 mm Maximum workpiece passage: 270 mm Maximum grinding diameter: 200 mm Grinding length between centers: 300 – 500 mm Lsdpfsxqgb Tsx Afisah Maximum workpiece weight between centers: 15 kg MACHINE DETAILS Dimensions & Weight Dimensions (L x W x H): 4,000 x 2,000 x 2,000 mm Weight: 2,000 kg EQUIPMENT HEIDENHAIN digital readout Matching workbench with contents Suitable grinding wheels Arbors Suitable spare parts

Condition: good (used), Tapping machine, bench drilling machine -Spindle mount: B12 -Tap chuck: Tapmatic 30 X M1.5-M7 Lajdpfx Aeb A Imxjfioh -Projection: 165 mm -Motor power: 0.25 kW -Weight: 60 kg

Condition: new, functionality: fully functional, power: 200 kW (271.92 HP), color: other, Year of construction: 2025, Equipment: ABS, CONSTMACH jaw crushers are designed to offer high durability and superior crushing performance, making them ideal machines for primary crushing operations in quarries and mines. They have the capacity to process a wide range of materials, from the softest limestone to the hardest types of granite and basalt. Their robust construction, high flywheel torque, and special jaw geometry ensure high-efficiency crushing of material into uniform sizes. The advanced hydraulic adjustment mechanism allows for easy adjustment of the desired output size and minimizes operator intervention. CONSTMACH jaw crushers ensure long-lasting use with their forged chrome-nickel steel pitman structure, heavy-duty bearings, and automatic lubrication systems. The welded main frame, which has undergone thermal stress relief treatment, maintains maximum durability even under high vibration. The user-friendly maintenance design provides an uninterrupted and safe working environment during production processes. These machines can be integrated into stationary or mobile crushing plants, offering high flexibility for projects. CJC-140 Technical Specifications Jaw Size: 1,400 x 1,100 mm Motor Power: 200 kW Shaft Speed: 220 rpm Weight: 52,000 kg Min./Max. Adjustment: 120 - 280 mm Production Capacity: 420 - 850 t/h Why Choose CONSTMACH Jaw Crushers CONSTMACH is a symbol of quality and reliability in crushing and screening technologies. Each jaw crusher model undergoes production processes that comply with international standards, ensuring maximum performance, low operating costs, and a long service life. With customizable design options tailored to customer needs and an extensive service network, it supports your business's uninterrupted production goals. In terms of reliable performance, engineering quality, and after-sales technical support, CONSTMACH is the right choice for crushing systems. Laedpexqf Ryjfx Afieh What Do We Do at Constmach? Constmach is a leading machine manufacturer serving the construction and mining industries with a wide range of products. Our product portfolio includes concrete block making machines, stationary and mobile concrete plants, stone crushing machines, stone crushing and screening plants, sand washing machines, sand making machines, asphalt plants, conveyor belt systems, jaw crushers, and mobile crushing plants. With its high quality standards, innovative production approach, and customer-focused solutions, Constmach stands out as a reliable brand in both national and international markets. Our products continue to be the preferred choice of industry professionals due to their durability, efficiency, and long-lasting performance.

Year of construction: 2015, condition: used, machine/vehicle number: 12162, Technical data: - Manufacturer: Löwer - Type: DM 3DBB 400 - Year of manufacture: 2015 - Max. brush width: 1,350 mm - Max. brush diameter: 400 mm - Max. working height: 100 mm - Brush motor – rated power: 2 × 2.5 kW - Brush motor speed: 1,410 rpm - Feed motor – rated power: 1.5 kW - Feed motor – speed: 935 rpm - Disc motor – rated power: 2 × 1.5 kW - Disc motor speed: 1,410 rpm - Disc speed: 50–350 rpm - Vacuum motor – rated power 7.5 kW - Vacuum motor – speed 2,800 rpm - Height adjustment motor – rated power: 0.45 kW - Height adjustment motor – speed 1,410 rpm - Brush speed 30–350 rpm - Feed speed 3–15 m/min. - Weight: 1900 kg 2.5 ELECTRICAL CONNECTION - Operating voltage 400 V - Frequency 50 Hz - Fuse provided by customer 63 A Lajdpfx Asxqf I Esfish - Full load current: 47 A - The cross-section of the supply cable must be at least AWG 2 (25 mm²). 2.6 PNEUMATIC CONNECTION - Operating pressure 6–8 bar - Maximum pressure 8 bar 2.7 EXHAUST CONNECTION - Connection size 4 x Ø = 140 mm - Air requirement 1,108 m³/h per connection - Minimum air velocity at the connection on the machine 20 m/s - Negative pressure at the extraction connection 1,180 Pa For blowing device: - Connection size 3 × Ø = 80 mm - Air requirement 390 m³/h per connection - Minimum air speed at the connection on the machine 20 m/s - Negative pressure at the suction connection 950 Pa - Vacuum outlet 1 × Ø = 200 mm, 300 m³/h

Condition: good (used), Year of construction: 1995, Used radial drilling machine from MAS Capacity ø 63mm Laodpfx Afsxqfx Deioh Equipped with drilling cube

Condition: used, functionality: fully functional, Vertical strapping machine Lodoxqfbropfx Afieah

Condition: ready for operation (used), functionality: fully functional, machine/vehicle number: 384, grinding wheel diameter: 250 mm, table length: 1,300 mm, table width: 500 mm, overall weight: 1,500 kg, jaw width: 160 mm, No minimum price – guaranteed sale to the highest bidder! The machine is being auctioned as part of a business closure. Placing a bid obligates you to collect the machine on time between 26.01.2026 and 29.01.2026! TECHNICAL DETAILS Table dimensions: 1,300 x 500 mm Magnet dimensions: 1,020 x 450 mm Grinding wheel diameter: 250 mm Jaw width: 160 mm MACHINE DETAILS Electrical Data Operating voltage: 380 V Control voltage: 220 V Rated current: 25 A Dimensions & Weight Dimensions (L x W x H): 2,500 x 2,400 x 1,900 mm Weight: 1,500 kg EQUIPMENT 3 T-slots Magnetic chuck Various grinding wheels Vice Belt filter system Ledpfx Afoxqf Uxjieah

Condition: used, Year of construction: 1990, Precision grinding of cylindrical workpieces – external and internal grinding, as well as form or thread grinding possible. Swivel unit is defective and can only grind cylindrically. Swivel axis can be repaired. Marposs, 3 spindle heads for external, internal, and shoulder grinding. Machine is equipped with a Siemens 3G control. Lajdoxqfanspfx Afioh

Condition: good (used), Year of construction: 2016, Ref. -No.: 10569 Manufacturer: SORALUCE Type: TA - 35 A Year of construction: 2016 Type of control: CNC Control: Heidenhain TNC 640 / TNC 7 Storage location: Halberstadt X-Travel: 3500 mm Y-Travel: 1400 mm Z-Travel: 1500 mm Feed force (X, Y, Z): 10000 N A-Axis: 2,5 ° C-Axis: 2,5 ° Turning Speeds: 6000 / 7000 / 12000 / 30000 / 40000 RPM Max. Torque: 479 Nm Max. Workpiece Weight: 7,8 t Rapid Traverse X/Y/Z: 25 m / min Table-Size (Lxw): 3860 x 1200 mm Power Capacity: 32 kW Tool changer: 40 Swivel range milling head: 2,5 x 2,5 ° Table load max.: 10500 kg Tool Taper: ISO 50, DIN 69871 AD Tool places: 60 Feed rate: 10 - 25000 mm / min Lajdpfx Afoxqd Ecsijh Weight: 19 t Number Of T-Slots: 8 Pcs Width of the T-slots: 22 H12 mm Distance between the grooves: 140 mm Chip conveyor: 2 Pcs Further information: - Universal milling head for processing at any angle - Compact design for installation without a separate foundation - The machine design was analyzed, developed and optimized using the finite element method (FEM). - Cast construction for maximum stability - DAS+R vibration damping for increased productivity - Highest precision for decades - Milling head types Universal milling head - Vertical milling head with fourth axis and high-frequency spindle - Electronic handwheel with cable or radio - Coolant type Coolant / air / air with MQL - Coolant system via spray ring and IKZ up to 70 bar - Infinitely variable via Heidenhain AC servo motors including digital drive technology Machine can be inspected under power by arrangement.

Condition: like new (used), Year of construction: 2012, operating hours: 40,600 h, 1,0 St. gebr. Spritzgießmaschine mit Palettenwechseler Hersteller: KRAUSS MAFFEI Laodpfjxac Ibsx Afioh Typ: KM80-380 AX Baujahr: 2012 Schließkraft: 80 Tonnen Holmabstand 480 x 410 mm Einbauhöhe min.: 180 mm Öffnungsweg: 550 mm Schnecken DN: 35 mm Max. Hubvolumen: 154 cm³ Spritzteilgewicht: 140 g/PS Steuerung: MC5 Ausstattung: Palettenwechseler Schnittstelle Temperiergerät Verschleißarme Plastifizierung Ca. 40.600 Betriebsstunden

Condition: used, Year of construction: 2019, Welding machine Manufacturer: Merkle Model: HighPulse 552 RS Year of manufacture: 2019 Water cooling Wire feeder and torch incl. Binzel shut-off safety device Welding machine suitable for robot operation only, not for manual use! Lasdpjwvt Rnjfx Afijh

Condition: ready for operation (used), Year of construction: 2005, functionality: fully functional, machine/vehicle number: 005121946, grinding length: 1,850 mm, table load: 2,700 kg, travel distance X-axis: 2,000 mm, grinding wheel speed: 1,450 rpm, controller model: SIEMENS SINUMERIK 840 Di, No minimum price – guaranteed sale to the highest bidder! The machine is being auctioned due to a business closure. Submitting a bid obliges the buyer to collect the machine within the specified period: between 26.01.2026 and 29.01.2026! TECHNICAL DETAILS Longitudinal travel: 2,000 mm Longitudinal grinding length: 1,850 mm Table dimensions: 1,700 x 600 mm Longitudinal feed speed: 1 – 40 m/min Cross travel: 915 mm Maximum cross grinding width: 1,050 mm Adjustable cross feed speed: 0 – 4 m/min Stepped cross traverse: 0 – 40 mm Max. vertical grinding height: 700 mm Grinding wheel speed: 1,450 rpm Grinding wheel dimensions: 450 x 100 x 203 mm Permissible table load: 2,700 kg MACHINE DETAILS Control system: SIEMENS SINUMERIK 840 Di Electrical data Lajdpfx Afoxqf Sqjish Operating voltage: 400 V Frequency: 50 Hz Rated current: 56 A Connection: 10 kA Dimensions & Weight Dimensions (L x W x H): 7,000 x 3,300 x 3,000 mm Weight: 13,800 kg EQUIPMENT Magnetic chuck (1,500 x 800 mm) Note: Transport on a truck with a width of 3,000 mm is possible.

Condition: good (used), Year of construction: 2001, Ref. -No.: 10551 Manufacturer: TRAUB Type: TNC 42/65 Year of construction: 2001 Type of control: CNC Control: TRAUB TX Storage location: Halberstadt Country of origin: Germany Machine-No.: 93XXXXX Turning Speeds: 8000 RPM X stroke: 450 mm Turning Length: 450 mm Spindle Speeds: 4000 RPM Clamping Diameter: 42 / 65 mm Spindle Diameter In Front Bearing: 110 mm Tool Taper: 14 Max. Torque: 170 / 230 Nm Rapid Travel Speed X-Axis: 15 m / min Rapid Travel Speed Y-Axis: 6 m / min Rapid Travel Speed Z-Axis: 30 m / min Laodpfx Aexqd D Sjfish Dimensions Of The Machine (Lxwxh): 4354 x 2076 x 1917 m Chisel slide cross section turning and milling support: 16 x16 ( 20 x20 ) mm Pressure: 70 bar hydraulic tank: 70 L. Total Power Requirement: 39 kVA Weight Of The Machine Ca.: 5,2 t Feed force X-axis at 100% duty cycle: 5000 N Feed path X-axis: 140 mm Z-axis feed path: 450 mm Y-axis feed path: 35 mm Ball screw Z-axis (Ø x pitch): 32 x 10 mm Ball screw X-axis (Ø x pitch): 32 x 5 mm Ball screw Y-axis (Ø x pitch): 25 x 5 mm Further information: - Revolver 1 Number of branches 10 - Revolver 2 Number of branches 14 - Hecowpkfie Htlx Tfefh - Powered tools Yes

Condition: excellent (used), Year of construction: 2001, operating hours: 23,400 h, 1,0 St. gebr. Spritzgießmaschine Hersteller: ARBURG Typ: 420C1000-250 Baujahr: 2001 Schließkraft: 100 Tonnen Holmabstand 420 x 420 mm Schnecken DN: 40 mm Dosiervolumen: 188 ccm³ Spritzteilgewicht 172 g/PS Lajdpfjw U Ebbsx Afish Steuerung: SELGOCIA Ausstattung: -Angußpicker, Hersteller: GEIGER

Condition: good (used), Year of construction: 2016, Pad printing machine Manufacturer: TIC Type: PRK4S165 Year of manufacture: 2016 4-colour printing machine Lasdpjv Ayd Nefx Afijh Pad pressure: approx. 270 kg electropneumatic control closed ink system Ink pot diameter: 140 mm Cliché size W/D: 4 x 150 x 320 mm height adjustable via spindle pneumatically controlled sliding table floor-standing model 221025ä

Condition: ready for operation (used), functionality: fully functional, grinding wheel diameter: 120 mm, overall weight: 200 kg, table length: 290 mm, table width: 180 mm, No minimum price – guaranteed sale to the highest bidder! The machine is being auctioned due to a business closure. Placing a bid obligates you to collect the item within the specified period from 26.01.2026 to 29.01.2026! TECHNICAL DETAILS Table dimensions: 290 x 180 mm Grinding wheel diameter: 120 mm Ledpfx Afoxqf Rgoioah MACHINE DETAILS Dimensions & Weight Dimensions (L x W x H): 1,130 x 550 x 1,700 mm Weight: 200 kg

Condition: good (used), Year of construction: 2012, Ref. -No.: 10290 Manufacturer: KOLB KLUEPPELBERG Type: Cubimat YC 2000 Year of construction: 2012 Type of control: CNC Control: Siemens Sinumerik 840 D Storage location: Halberstadt Country of origin: Deutschland Machine number: 016453-20.1 X-Travel: 7000 mm Y-Travel: 4000 mm Z-Travel: 4000 mm W-Travel: 2.000 mm Speed work spindle: 4.000 RPM Max. Torque: 2.100 Nm Max. Workpiece Weight: 20 t Table-Size (Lxw): 2.800 x 2.000 mm Table load max.: 18.000 kg Tool Taper: SK 50 Tool places: 360 Distance Between Columns: 3.200 x 4.000 mm Ljdpfx Aoxqdz Rjfijah Further information: - 4 milling heads available - 1 universal head - Pick Up Head Station The machine can be viewed under power by arrangement.

Condition: used, Year of construction: 2010, Mobile measuring articulated arm, measuring machine, measuring device Laodpewu E D Rjfx Afijh Manufacturer: Zett Mess Type: AMPG 2400 Precision Year of manufacture: 2010 - unused Measuring diameter: 2,400 mm 221025ä

Condition: ready for operation (used), functionality: fully functional, machine/vehicle number: 6471, grinding wheel diameter: 200 mm, overall weight: 1,000 kg, No reserve price – guaranteed sale to the highest bidder! The machine is being auctioned due to business closure. Placing a bid obligates timely collection between 26/01/2026 and 29/01/2026! TECHNICAL DETAILS Magnet dimensions: 450 x 220 mm Grinding wheel diameter: 200 mm Lasdpfexqf E Rjx Afieh MACHINE DETAILS Electrical data Operating voltage: 380 V Frequency: 50 Hz Rated current: 15 A Dimensions & weight Dimensions (L x W x H): 3,000 x 1,500 x 1,700 mm Weight: 1,000 kg EQUIPMENT DIAFORM dressing device

Condition: good (used), Year of construction: 1974, Ref. -No.: 10159 Ledpsxqdzwefx Afioah Manufacturer: KELLENBERGER Type: 1000 U Year of construction: 1974 Storage location: Halberstadt Country of origin: Schweiz Grinding Length: 1000 mm Grinding Diameter: 250 mm

Condition: used, Year of construction: 2012, Air Cushion Machine Fromm Airpad Machine Manufacturer: Brüninghaus Model: AP 502 Year of manufacture: approx. 2012 Film material: PA/PE composite film o r Polyethylene film (100% recyclable) Compressed air connection: NW 10/4 - 8 bar; max. 82 Nl/min (during cushion production): max. 3.5 Nl/cycle Output: 25 – 49 cycles/min (depending on film type and cushion size) Electrical connection: 230 VAC; 50/60 Hz; 16 A; 2.0 kVA Laedpjwulyljfx Afish Dimensions: (LxWxH) 1,600 x 767 x 1,292 mm Weight: 230 kg Accessories / Special equipment: • Stored programs for various cushion sizes • Program change at the press of a button • Individual production from 4 cm to 16 cm length with defined filling degree • 10 programs available for storing multiple parameters 221025ä

Year of construction: 1973, condition: ready for operation (used), functionality: fully functional, overall weight: 70 kg, rotational speed (max.): 6,400 rpm, table length: 500 mm, table width: 70 mm, machine/vehicle number: 1502, No reserve price – guaranteed sale to the highest bidder! Lsdpfsxqf A Nex Afijah The machine is being auctioned due to a business closure. Placing a bid obligates you to timely collection between 26.01.2026 and 29.01.2026! TECHNICAL DETAILS Speed: 6,400 rpm Table dimensions: 500 x 70 mm MACHINE DETAILS Electrical data Operating voltage: 380 V Connected load: 1.5 HP Dimensions & Weight Dimensions (L x W x H): 500 x 300 x 950 mm Weight: 70 kg

Condition: ready for operation (used), functionality: fully functional, 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 Lsdpfsxqfk Tex Afijah X and Y-axis feed: 0 to 1,500/3,000 mm/min W-axis feed: 800 mm/min 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: ready for operation (used), Year of construction: 1984, functionality: fully functional, machine/vehicle number: 0175, travel distance X-axis: 650 mm, travel distance Y-axis: 450 mm, travel distance Z-axis: 140 mm, spindle speed (max.): 80,000 rpm, table load: 500 kg, No reserve price – guaranteed sale to the highest bidder! The machine is being auctioned due to a business closure. By placing a bid, you commit to timely collection between 26.01.2026 and 29.01.2026! TECHNICAL DETAILS Travel Distances Travel X-axis: 650 mm Travel Y-axis: 450 mm Travel Z-axis: 140 mm Travel W-axis: 500 mm Travel U-axis: 6/20 mm Clearance between columns: 750 mm Laedpfx Afoxqd Htjijh Clearance from table to spindle: 600 mm Main spindle diameter: 100 mm Work Table Table dimensions: 770 x 630 mm Table load capacity: max. 500 kg Taper grinding: max. 16° Digital readout X/Y-axis: 0.001 mm Positioning accuracy at 20°: 0.004 mm Spindle speed: from 9,000 to 80,000 rpm Feed Feed rates X and Y-axis: 0 – 3,000 mm/min Feed rate W-axis: approx. 800 mm/min Feed rate Z-axis: from 15 to 6,000 mm/min MACHINE DETAILS Control: HAUSER Electrical Data Operating voltage: 3 x 380 V Frequency: 50 Hz Control voltage: 110 V Connection: 8 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 abrasives Selection of high-frequency grinding heads Büche ENF 4000 extraction unit