Used Cnc Grinding Machine for sale (83,963)

Condition: used, Year of construction: 1998, centre height 125 mm centre distance 400 mm Bjdpfxjxwdwfj Ab Tsdk Control FANUC 21i Capstan diameter max. 406 mm wheel dimensions 406 x 127 x 40 mm workpiece weight 30 kg longitudinal slide -travel 483 mm cross slide - travel 254 mm total power requirement max. 20 kVA weight of the machine ca. 4,0 t dimensions of the machine ca. 3,0 x 2,0 x 2,1 m including 2 Pcs. internal grinding spindle incl. B axis 1° Hirt, controlled incl. C-axis incl. Quick-Set Probe including Sensitron including Magnetic Jaw including hydraulically foldable dresser including other small accessories including documentation without a coolant system, as it was previously connected to a central unit Power On hours approx. 71,000 h Spindle hours approx. 25,900 h

Condition: ready for operation (used), Year of construction: 2001, operating hours: 87,310 h, functionality: fully functional, grinding wheel width: 400 mm, grinding wheel diameter: 600 mm, grinding diameter: 220 mm, overall weight: 13,000 kg, TECHNICAL DETAILS Maximum grinding diameter: 220 mm Regulating wheel width: 400 mm Maximum grinding wheel width: 400 mm Grinding wheel drive: 55 kW Maximum circumferential speed: 45 m/s Regulating wheel dimensions: 350 x 400 x 203 mm CBN grinding wheel dimensions: 500 x 400 x 304 mm Aluminum oxide grinding wheel dimensions: 600 x 400 x 304 mm Bdedpfxjxvxhce Ab Tjk Grinding spindle headstock Total stroke of grinding spindle headstock: 130 mm Speed of grinding spindle headstock: 150 m/min Rapid traverse adjustment max.: 150 m/min Minimum infeed of grinding spindle headstock: 0.0005 mm Preselectable infeed size of grinding spindle headstock: 0.0005–0.05 mm Grinding wheel dresser Dresser support speed: 15–900 m/min Maximum stroke of dresser supports: 430 mm MACHINE DETAILS Overall power requirement: 75 kVA Dimensions & Weight Space requirement approx.: 4.47 x 2.77 x 2.49 m Machine weight approx.: 13 t Operating hours: 87,310 h

Condition: good (used), Year of construction: 2000, Ref. -No.: 10609 Manufacturer: GLEASON - PFAUTER Type: P 2400 G Year of construction: 2000 Type of control: CNC Control: Siemens 840 D Storage location: Halberstadt Country of origin: Germany Bjdexvw R Nopfx Ab Tsdk Machine length: 1100 mm Machine width: 6585 mm Machine Height: 5200 mm Max. Workpiece Diameter: 2640 mm Weight Of The Machine Ca.: 23 t Grinding Wheel Diameter: 400 mm Spindle Speeds (Infinitely Variable): 600 bis 6000 mm Grinding Wheel Width: 80 mm X-Axis: 1200 mm Y-Axis: 300 mm Z-Axis: 1000 mm Z2 - axis: 150 mm Sandable profile depth: 80 mm Workpiece table: 0 bis 5 1 / min Feed rate X-axis: 3000 mm Feed rate Y-axis: 5000 mm Z-axis feed rate: 6000 mm Further information: - Fully automatic centering device - Oil mist separation - Gear tooth measurement - “Profile grinding” software package - Error diagnosis - IFK2 internal milling head - Milling mandrel with spacer discs - Chip conveyor - Oil mist extraction - Technical documentation

Condition: used, Distance between centres: 1000 mm Centre height: 250 mm B-axis: Accuracy 0.1" CNC brand: Kelco CNC model: 90 Left grinding wheel dimensions (OD x ID x width): Ø400 x Ø127 x 63 mm Right grinding wheel dimensions (OD x ID x width): Ø400 x Ø127 x 50 mm Workhead swivel: -30º to +120º Workhead taper: MK 5 Max. workpiece weight between centres: 150 kg Tailstock taper: MK 4 Bdedpfoxmg Ekex Ab Tsk Tailstock quill travel: 50 mm Maximum peripheral speed: 32 m/s High-frequency internal grinding spindle: Ø120 mm High-frequency internal grinding spindle brand: WARNER model K 3.000 Main motor power: 7.5 kW Total power: 26.5 kW Max. Z-axis travel: 1,150 mm Max. Z-axis feed speed: 15 m/min Worktable rotation: 0º to 9º Max. X-axis travel: 320 mm Max. X-axis feed speed: 7.5 m/min Length: 3,600 mm Width: 2,000 mm Approx. weight: 5,000 kg

Condition: as good as new (ex-display), Year of construction: 2025, functionality: fully functional, Demonstration machine BUB 63 CNC 3000 Centre height: 630 mm Centre distance: 3000 mm 1 grinding wheel: 500/380 x 100 x 203 mm Bdsdpfx Abev N D Hbe Tok

Condition: ready for operation (used), Year of construction: 1991, operating hours: 39,428 h, functionality: fully functional, machine/vehicle number: 1168, grinding length: 600 mm, table length: 600 mm, table width: 200 mm, travel distance Y-axis: 400 mm, travel distance Z-axis: 230 mm, No reserve price – guaranteed sale to the highest bidder! The payment deadline for the machine is 04/12/2025! Bidding obligates the buyer to collect the machine within the scheduled period between 10/12/2025 and 12/12/2025! TECHNICAL DETAILS Longitudinal grinding travel X-axis: 600 mm Travel range Y-axis: 400 mm Travel range Z-axis: 230 mm Work table Clamping surface: 600 x 200 mm Table load: max. 100 kP Distance table surface to grinding spindle center: max. 500 mm Table longitudinal feed (X-axis): 1 – 24 m/min Table cross feed (Z-axis): 2,000 mm/min Grinding wheel dimensions: 250 x 25 x 51 mm Digital axis display: 0.001 mm Bedsxvp Elopfx Ab Tedk Grinding head infeed (Y-axis): 2,000 mm/min Magnet dimensions: 450 x 220 mm MACHINE DETAILS Electrical data Operating voltage: 380 V Frequency: 50 Hz Rated current: 30 A Dimensions & Weight Dimensions (L x W x H): 3,000 x 2,000 x 2,100 mm Weight: 2,000 kg Operating hours: 39,428 h

Condition: used, Year of construction: 1998, control Siemens Sinumerik grinding wheel diameter 900 mm grinding wheel width 20-80 mm Bedpfx Aboxuv Uds Tjdk In our opinion, the machine is in good condition used condition. Double face side grinders The machine was used for the production of connecting rods. Accessories, tools and clamping devices shown are only part of the scope of delivery if this is noted in the additional information. Changes and errors in the technical data and information as well as Subject to prior sale!

Year of construction: 2001, condition: good (used), table diameter 200 mm workpiece height 100 mm number of wheels 1 Control Robot CNC total power requirement 6 kW weight of the machine ca. 1,8 t Bdsdpfxjtt Tb Dj Ab Tjk dimensions of the machine ca. 1,83 x 2,04 x 2,1 m Technical data - Grinding capacity : Ø 0.025 –12.7 [mm] - Bar diameter : Ø 1.0 –12.7 [mm] - Grinding length : W15 (option W20) - Z-axis : 35[mm] Resolution : 0.5 [µm] – X- axis : 25 [ mm] Resolution : 0.1µm – Y-axis : 286[mm] Resolution : 0.5µm – U- axis : 15 [mm] Resolution : 0.1µm Head Motor: 0.70 [kW] Rotation: 300 – 3000 [rpm] Grinding - Raw grinding : 1.5 [kW] Spindle : Ø 60 [mm] Grinding wheel diameter : Ø 200 [mm] Cutting speed : 30 m/sec. - Completion: 0.75 [kW] Spindle: Ø100 [mm] Grinding wheel diameter: Ø150 [mm] Cutting speed: adjustable - Dimensions (L x W x H): 1830 x 2040 x 2100 mm - Weight: approx. 1800 [kg] Accessories - Loading and unloading robots - Fire protection device CONTROL axes; 4 axes + 2 programmable robots - simultaneously linear interpolation of the 4 axes + cylindrical interpolation of 2 robot axes

Year of construction: 2002, condition: ready for operation (used), General Data Measurements depth 3340 mm Measurements width 1960 Measurements height 2050 mm Machine weight 5000 kg Bdodpfx Aoxulfxob Tok Control Unit Brand FANUC Model Series 21i-T This JUNKER EJ 29 CNC was manufactured in 2002. A robust cylindrical grinding machine, it features a grinding wheel diameter of 400 mm, motor power of 4.5 kW, and spindle speeds up to 1000 rpm. It can handle grinding lengths up to 600 mm and diameters up to 280 mm. Control is managed via a GE Fanuc Series 21i-T unit. Consider the opportunity to buy this JUNKER EJ 29 CNC cylindrical grinding machine. Contact us for more information. Application Types Grinding

Condition: used, Distance between centers: 1000 mm Maximum external grinding diameter: 320 mm Grinding wheel dimensions (OD x ID x width): Ø500 x Ø127 x 80 mm Maximum internal grinding diameter: 200 mm Center height: 175 mm Control type (CNC/manual): CNC CNC brand: FANUC CNC model: 16GC Maximum grinding length: 1000 mm Maximum workpiece weight: 130 kg Main motor power: 7.5 kW / 2870 rpm Total power: 30 kW Internal grinding spindle power: 15 kW Max. workhead spindle speed: 30 - 750 rpm Voltage: 380 V / 50 Hz X-axis feed: 0.0001 – 5,000 mm/min Bedjxxmcgspfx Ab Tsdk Z-axis feed: 0.0001 – 10,000 mm/min Air pressure: 1.5 - 3 bar Coolant flow rate: 100 L/min Max. Z-axis travel: 1050 mm Max. X-axis travel: 275 mm Max. worktable swivel: 8.5º Workhead internal taper: M 5 Tailstock taper: M 3 Tailstock quill travel: 35 mm Dimensions (L x W x H): 3,687 mm x 2,000 mm x 2,090 mm Weight: 5,200 kg

Condition: used, Year of construction: 1995, Surface grinding machine Manufacturer: Jung Model: JA 500 CNC-C Year of manufacture: 1995 Overhauled in: 2003 Grinding length: 500 mm Grinding width: 200 mm Max. workpiece height: 250 mm Table dimensions X/Y: 600 mm / 200 mm Grinding wheel diameter: 225 mm Bodpfx Abswp E Rgj Tedk Grinding wheel width: 25 mm Grinding wheel bore: 51 mm Speed: 4,200 rpm Machine weight: approx. 2,500 kg

Condition: good (used), Year of construction: 2007, Kuehlmittelanlage 2.500l, Haftkraftregelung, halbautom. Wuchtsystem Schleiflaenge 3150 mm Schleifbreite 800 mm Werkstueckhoehe 650 mm Tischflaeche 3.150 x 600 mm Magnetspannplatte 3.000 x 600 mm Spindeldrehanzahl 1/min Schleifscheibenabmessung 450 x 100 x 127 mm Spindelleistung kW Gesamtleistungsbedarf 22 kW Maschinengewicht ca. t Raumbedarf ca. 11 x 3 x 2,4 m Bodpfx Abedgk H Ao Tjdk

Condition: used, Year of construction: 2007, Technical details: grinding length: 3150 mm grinding width: 800 mm workpiece height: 650 mm table surface area: 3.150 x 600 mm Bjdpfx Aouh H Iyob Tjdk magnetic clamping plate: 3.000 x 600 mm table load: max. 6 t dimensions of grinding wheel: 450 x 100 x 127 mm : 22 kW total power requirement: 70,6 kW weight of the machine ca.: 15 t dimensions of the machine ca.: 11 x 3 x 2,4 m surface grinding machine, CNC Flachschleifmaschine, coolant device 2.500l, magnetical adhesive force control, semi automatic balancing system, *

Condition: good (used), Year of construction: 2009, functionality: fully functional, machine/vehicle number: 004-040.0004, CNC Cylindrical Grinding Machine Manufacturer: STUDER Model: S22 CNC Year of manufacture: 2009 Machine / Workpiece Data Distance between centers: approx. 650 mm Center height: 175 mm Maximum workpiece weight: 150 kg Maximum grinding length: approx. 800 mm Linear Axes / Guides X-axis (cross slide): Maximum travel approx. 310 mm X-axis feed rate up to approx. 15,000 mm/min (depending on configuration) Z-axis (longitudinal slide): Maximum travel approx. 850 mm Z-axis feed rate up to approx. 30,000 mm/min Grinding Spindle / Grinding Wheel Main spindle power, e.g. 12.5 kW in the standard version Standard grinding wheel diameter e.g. Ø 500 × 80 × 203 mm, circumferential speed up to approx. 50 m/s Optional high-speed grinding (HSG): e.g. grinding wheel Ø 400 x 40 x 127 mm, circumferential speed up to approx. 140 m/s Control / Software / Equipment Control, standard: e.g. FANUC 31i-A (PC integrated) with StuderWIN operator interface Bdsdpfsxtpnzsx Ab Tok Guideways: Machine bed made from Granitan® S103 (mineral cast) for thermal stability and damping Dimensions / Electrical Data Machine weight approx. 8,500 kg Power supply, typically 400 V / 50 Hz (country-specific)

Year of construction: 2019, condition: excellent (used), Machine capacity CAPACITIES · Height of centre points Max. diameter for cylindrical grinding Distance between centres Max. length for cylindrical grinding Max. workpiece weight without steadies | Metric | |---|---| | 335 mm | | 450 mm | | 2150 mm | | 2100 mm | | 260 kg | TECHNICAL DATA Metric GRINDING SPINDLE UNIT Cylindrical grinding spindle 1: Electric spindle Max. grinding wheel dimensions: 610 × 50 × 203.5 mm Peripheral speed of grinding wheel: 30 - 125 m/sec Max. grinding spindle speed: 4420 min⁻¹ Cylindrical grinding spindle 2: Electric spindle Max. grinding wheel dimensions: 350 × 20 × 127 mm Peripheral speed of grinding wheel: 70 - 110 m/sec Max. grinding spindle speed: 6000 min⁻¹ X & Z AXES X & Z axes movement: ball screw X-axis traverse path: 460 mm X-axis speed range: 0-5000 mm/min X-axis resolution: 0.0001 mm Z-axis traverse path: 2590 mm Z-axis speed range: 0-5000 mm/min Z-axis resolution: 0.0001 mm B AXIS Swivel angle: 0 - 180° Type: automatic via torque motor C AXIS Workpiece speed range: 0-750 min⁻¹ Coupling type: headstock and tailstock TM 5 Tailstock sleeve diameter: 80 mm Tailstock sleeve stroke: 80 mm Tailstock adjustment accuracy: +/- 200 μm EQUIPMENT DETAILS GRINDING WHEEL DRESSING DEVICE Type: dressing station with fixed points for cylindrical grinding + electric spindle for diamond dressing roll COOLANT SYSTEM Type: magnetic separator and filter paper Bodpfx Absxr I Ane Todk Flow rate / output: 50-200 l/min Tank capacity: 2000 litres Pump pressure: 5-20 bar OIL MIST EXTRACTION UNIT Volume flow / exhaust quantity: 2000 m³/h Max. power: 2.3 kW CNC CONTROL Brand: Siemens Model: Sinumerik 840 SL Unit system: metric MEASURING SYSTEMS FOR X & Z AXES Type: linear encoder

Condition: good (used), Year of construction: 1993, with oil filtration system Bedpfx Ajxr Arqsb Tedk Unfortunately, no further technical data is available.

Condition: good (used), Year of construction: 1992, 1,0 St. gebr. Flachschleifmaschine Hersteller: ELB Typ: SUPER - RUBIN 024 CNC Baujahr: 1992 Verfahrwege: Schleiflänge: 600 mm Bsdpfxji Ra Tye Ab Tjdk Schleifbreite: 275 mm Schleifhöhe: 375 mm Tischaufspannfläche: 900 x 300 mm Tischbelastung: 300 kg Vertikal - Vorschub: max. 300 mm/min. Quervorschub: max. 2.000 mm/min. Steuerung: UNICON Im Lieferumfang sind Schleifscheiben enthalten siehe Fotos.

Condition: used, Year of construction: 2006, grinding diameter 250 mm grinding length 1000 mm Control Kavalir K 51 peripheral speed 25 - 45 m/sec Bodpsxrvmnefx Ab Tjdk max. workpiece weight between centres 80 kg voltage 400V AC 50 Hz control voltage 24V AC/DC current -Sicherung für Zuleitung 35 A weight of the machine ca. 3,8 t

Year of construction: 1996, condition: ready for operation (used), Center height: 150mm, max. grinding diameter: 300mm, distance between centers: 620mm, max. workpiece weight: 120kg, grinding head spindle swivel range: +45°/-15°, table adjustment: +/-8.5°, travel X/Z: 160mm/756mm, grinding wheel dimensions X/Y/Z: 400mm/63mm/127mm, grinding wheel speed: 45m/s, workpiece spindle speed: 700rpm. Machine dimensions X/Y/Z: approx. 3000mm/1850mm/1850mm, weight: approx. 3000kg. Including LTA extraction system and SBS wheel balancing device. The workpiece drive is disassembled and its completeness is unknown. Documentation available. An on-site inspection is possible. Bdedpfxsxvdd Aj Ab Tek

Condition: used, Year of construction: 1980, machine/vehicle number: 19780, grinding length:600 mm grinding width:300 mm workpiece height:375 mm number of spindle speeds:1000 - 3000 UpM grinding wheel dimensions::300 x 50 x 76,2 mm grinding spindle drive:2,8 - 8,4 kW weight of the machine ca.:3,5 t CNC-controlled, 3D-controlled profile-dressing unit, Unicom ELB-CNC control with integrated 024 CNC Unicon electric hand wheel, display screen, analogue spindle load display, stepless adjustable cross feed, coolant device with magnetic-roller chip collector, full housing, separate electrical cabinet, additional grinding wheel with flange Bdodocxxrzspfx Ab Tjk

Condition: as good as new (ex-display), Year of construction: 2025, Centre height: 181 mm Bedpfx Astqf Sqob Tjdk Centre distance: 650 mm Maximum grindable workpiece diameter: 360 mm Max. load between centres (cantilevered): 1000 N (100 kg) Max. load between centres: 3000 N (300 kg) Z-axis: Table swivel angle: 10° Table drive, hydraulic: 0-4 m/min X-axis: Infeed spindle travel: 80 mm Rapid traverse (hydraulic): 50 mm Coarse adjustment (air cushion): 280 mm Feed drive by DC motor Rapid feed rate: 48 mm/min/Ø Feed process: plunge grinding / longitudinal grinding 4 preselectable feed rates: mm/min/Ø 0.01–48 4 preselectable infeed amounts: mm 0.001–0.1 Spark-out time, oscillation grinding: 0–99 s / 0–99 strokes Tapping infeed: mm/Ø 0.001 Grinding spindle headstock: universal, swiveling: 0–180° Grinding wheel (external): D x b x d (mm) 500x100x127 or 203.2 Grinding wheel (face - option): D (mm) 250x32x76.2 Grinding wheel (internal - option): D (mm) (2–250) Drive power, external/face: kW 5.5 (7.5) Drive power, internal: kW 2.2 Peripheral speed, external: m/s 35 (50) Grinding wheel wear (external): mm/Ø 160 Guard width: 100 mm Grinding spindle diameter: 60 mm Internal spindle mounting: 80 (100) mm Workpiece headstock: Stepless variable drive: Mk 4, 1/mm 30–270 / 50–450 Workpiece spindle fixable Spindle bore: MK 4/24 mm Spindle nose for flange mounting: MK 4 mm cylindrical Ø63H6 x 6 Workpiece headstock swivel on rotary part: 0–90° Tailstock: Quill mounting / quill diameter: MK 4 / 75 mm Quill stroke: 45 mm Quill force: 100–800 N / 250–1400 N adjustable Quill actuation: manual (foot switch) Quill fine adjustment: ±40 µm Connections: Total connected load (machine): 6.5–10 kW Grinding spindle headstock: 5.5 (7.5) kW Workpiece headstock: 0.55 (1.1) kW Coolant filtration: 0.75–2.2 kW Guideway lubrication pump: 0.1 kW Hydraulic pump: 1.5 kW Hydraulic tank: 80 L Pneumatics: 6 bar Comparable machines: Weiss / EMAG / GP cylindrical grinders / Studer / Kellenberger / Schaudt / Tschudin / Tacchella / Dannobat

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 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 Bdodpfexqfk Tex Ab Tsk High-frequency grinding head BÜCHE ENF 4000 extraction unit

Condition: excellent (used), Year of construction: 1997, grinding diameter 80 - 250 mm grinding length 600 mm centre height 175 mm longitudinal feed 750 mm workpiece turning speeds 6 - 600 U/min grinding spindle speed 1500 - 3600 U/min cross movement - autom. and by hand 320 mm Control Kelco 80 total power requirement kW weight of the machine ca. 4,4 t dimensions of the machine ca. 3,1 x 2,1 x 2,0 m Bjdpfx Aou D I Tleb Tedk

Condition: used, Year of construction: 1982, Technical details: grinding diameter: 350 mm grinding length: 1000 mm centre height: 225 mm grinding length: max. 1600 mm centre distance: 1540 mm spindle bore: 38 mm Bdedpfx Aow Rktzjb Tok max. swivability: 90 ° weight of the machine ca.: 6,0 t dimension machine xH: 4,4 x 2,45 x 2,3 mm Machine with CNC package and DFU connection Multi-range measuring head for interrupted surface Tailstock with cylinder error correction Final balance balancing device *

Condition: not inspected (used), Year of construction: 1984, functionality: unexamined, 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 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 Bdsdpfx Abjxqd Hte Tok Selection of high-frequency grinding heads Büche ENF 4000 extraction unit