Used Crushing Mill for sale (10,543)

Condition: used, CNC universal tool milling machine DECKEL, type FP 4 ME - DEFECTIVE Machine No. 2205, Year of manufacture 1989 Nodpfx Afoz Ebvrs Sedb CNC path control: GRUNDIG Contur 3 - Control system does not boot up Travel ranges: X: 485 mm, Y: 385 mm, Z: 380 mm Table size: 800 x 460 mm Spindle mount: ISO 40 Spindle speed: 63 - 3150 rpm, 22 steps Feed rate range: 2 - 3000 mm/min, stepless Quill movement: Horizontal and Vertical Main spindle drive: 3.7 / 4.4 kW - Hydraulic tool clamping - Swiveling control panel - Electronic handwheel - Fixed angular table - Coolant system in the machine base - Control cabinet located next to the machine, dimensions L x W x H: 800 x 750 x 1150 mm Space requirement L x W x H: 2000 x 2000 x 2000 mm Weight approx.: 2400 kg Good condition - control system does not boot up.

Condition: good (used), rotational speed (max.): 2,050 rpm, rotational speed (min.): 45 rpm, type of input current: three-phase, table length: 600 mm, table width: 210 mm, Used conventional milling machine Make: Metba Model: MB-1 Features a 3-axis dimension display. Table: 600x210mm Travel: - Longitudinal with motor / Manual table: 290mm / 300mm - Vertical manual with bellows / without bellows: 270mm / 320mm - Vertical motorized with bellows / without bellows: 260mm / 310mm - Cross travel of the headstock, manual: 180+120mm Automatic feeds: - Vertical and longitudinal: 15 to 500 mm/min. - Slow feed: 7 mm/min. - Rapid traverse: 1200 mm/min. Speeds: 12 (From 45 to 2,050 rpm) Motor power: 5Hp (Three-phase 380V) Headstock type: Swivel / Universal (accepts arbor or vertical headstock). Common uses: Machining of small/medium-sized parts, prototyping, and maintenance or restoration work. Includes: - Vise with swivel Njdpoz Dtw Sofx Af Sodb - Collet chuck with various sets of collets - Various milling tools (See photographs of the material on the floor)

Condition: excellent (used), Year of construction: 2008, functionality: fully functional, Tool milling machine Kunzmann WF4/3 with Heidenhain TNC 320 control system, in very good condition, CE-compliant, from a training workshop! Technical data: >> Year of manufacture 2008, machine no. 347139 >> Fixed angular table >> Speed: continuously variable up to 4500 rpm >> Feed rate continuously variable in 3 axes from 0 to 2000 mm/min >> Rapid traverse X and Y axis 5000 mm/min >> Z axis 4000 mm/min >> Travel distances X/Y/Z: 400/350/400 mm >> Table surface: 650 x 350 mm >> Table load: 250 kg >> Quill stroke vertical: 60 mm >> Vertical quill and horizontal quill - SK40 >> Hydraulic clamping system >> Weight approx. 1800 kg >> Space requirement approx.: 2.3 x 2 x 2 m >> Drive power: 15 KVA Ndsdpfx Asz Eh Tqsf Sjb Accessories and equipment: >> Heidenhain TNC 320 control system >> Hydraulic clamping, vertical and horizontal >> Automatic central lubrication >> Spindle brake >> Technical documentation, spare parts diagrams, operating manual for the control system and programming examples >> Handwheels >> Coolant system (not shown in the pictures) About the machine: Offered is a Kunzmann WF4/3 tool milling machine with a Heidenhain TNC 320 control system. This universal milling machine is in very good condition and has only a few operating hours. It comes from a company where it was only used for training purposes. It has a very easy-to-use control system. Furthermore, the machine has hydraulic clamping in both vertical and horizontal positions. Changing from vertical to horizontal is very easy by folding down the vertical head. The guides are regularly lubricated by the central lubrication system. The Kunzmann has been mechanically and electrically inspected by us. Take advantage of the opportunity to inspect and test the Kunzmann on site while it is powered up. There are 5 identical Kunzmann WF4/3 milling machines available from a vocational school. The machines are available immediately.

Condition: ready for operation (used), Year of construction: 2000, functionality: fully functional, travel distance X-axis: 3,500 mm, travel distance Y-axis: 2,500 mm, travel distance Z-axis: 1,250 mm, spindle diameter: 130 mm, spindle speed (min.): 10 rpm, spindle speed (max.): 2,500 rpm, table length: 2,200 mm, table width: 1,800 mm, TOS Varnsdorf WHQ 13.8 CNC table type horizontal boring mill, year of construction 2000, made in the Czech Republic. The machine is controlled by an original Heidenhain TNC 430 CNC with the Heidenhain operating panel and runs programs produced with CAM software. The control cabinet air conditioning unit was replaced one year ago. The machine is well maintained and in full working order. Technical data: - Control: Heidenhain TNC 430 - Spindle diameter: 130 mm - Spindle speed: 10 - 2,500 rpm - Tool taper: ISO SK 50 - X travel: 3,500 mm - Y travel (vertical axis): 2,500 mm - Z travel: 1,250 mm Nodpfx Aoz Ap Awsf Sodb - Table size: 2,200 x 1,800 mm - Operator platform with 250 kg load capacity - Air conditioning unit fitted one year ago - Programmable via CAM software The machine can be inspected under power in our workshop.

Condition: excellent (used), functionality: fully functional, travel distance X-axis: 1,000 mm, travel distance Y-axis: 450 mm, travel distance Z-axis: 630 mm, total height: 2,420 mm, total width: 1,862 mm, total length: 3,390 mm, overall weight: 2,450 kg, WAGNER MILLING MACHINE MODEL: BUT 1270 2VS 3-AXIS CNC X-AXIS: 1000 mm Y-AXIS: 450 mm Z-AXIS: 630 mm DRILLING DIAMETER: 40 Nedpfsz Ei S Iex Af Sodb USED MACHINE INTERNAL CODE: SVR 442

Condition: excellent (used), Year of construction: 2008, functionality: fully functional, Tool milling machine Kunzmann WF4/3 with Heidenhain TNC 320 control system, in very good condition, CE-compliant, from a training workshop! Technical data: >> Year of manufacture 2008, machine no. 347141 >> Fixed angular table >> Speed: continuously variable up to 4500 rpm >> Feed rate continuously variable in 3 axes from 0 to 2000 mm/min >> Rapid traverse X and Y axis 5000 mm/min >> Z axis 4000 mm/min >> Travel ranges X/Y/Z: 400/350/400 mm >> Table surface: 650 x 350 mm >> Table load: 250 kg >> Quill stroke vertical: 60 mm >> Vertical and horizontal quill - SK40 >> Hydraulic clamping system >> Weight approx. 1800 kg >> Space requirement approx.: 2.3 x 2 x 2 m >> Drive power: 15 KVA Accessories and equipment: >> Heidenhain TNC 320 control system >> Hydraulic chuck vertical and horizontal >> Automatic central lubrication >> Spindle brake >> Technical documentation, spare parts diagrams, operating instructions for the control system and programming examples >> Handwheels >> Coolant system (not shown in the pictures) About the machine: Offered is a tool milling machine Kunzmann WF4/3 with a Heidenhain TNC 320 control system. This universal milling machine is in very good condition and has only a few operating hours. It comes from a company where it was only used for training purposes. It has a very easy-to-use control system. Furthermore, the machine has hydraulic chucks for both vertical and horizontal operation. The conversion from vertical to horizontal is very easy by folding down the vertical head. The guides are regularly lubricated by the central lubrication system. The Kunzmann has been mechanically and electrically inspected by us. Take the opportunity to inspect and test the Kunzmann on site under power. Ndedsz Eh Uuspfx Af Ssb There are 5 identical Kunzmann WF4/3 milling machines available from a vocational school. The machines are available immediately.

Condition: excellent (used), Year of construction: 2008, functionality: fully functional, Tool milling machine Kunzmann WF4/3 with Heidenhain TNC 320 control system, in very good condition, CE compliant, from a training workshop! Technical data: >> Year of manufacture 2008, Machine No. 347142 >> Fixed angular table >> Speed: continuously variable up to 4500 rpm >> Feed rate continuously variable in 3 axes from 0 to 2000 mm/min >> Rapid traverse X and Y axis 5000 mm/min >> Z axis 4000 mm/min >> Travel distances X/Y/Z: 400/350/400 mm >> Table surface: 650 x 350 mm >> Table load: 250 kg >> Vertical quill stroke: 60 mm >> Vertical quill and horizontal quill - SK40 >> Hydraulic clamping system >> Weight approx. 1800 kg >> Space requirement approx.: 2.3 x 2 x 2 m >> Drive power: 15 KVA Accessories and equipment: >> Heidenhain TNC 320 control system >> Hydraulic chuck, vertical and horizontal >> Automatic central lubrication >> Spindle brake >> Technical documentation, spare parts diagrams, operating manual for the control system and programming examples >> Handwheels >> Coolant system (not shown in the pictures) Nedpfez Eh T Dsx Af Ssdb About the machine: Offered for sale is a Kunzmann WF4/3 tool milling machine with a Heidenhain TNC 320 control system. This universal milling machine is in very good condition and has only a few operating hours. It comes from a company where it was only used for training purposes. It has a very easy-to-use control system. Furthermore, the machine has hydraulic chucks for vertical and horizontal operation. Changing from vertical to horizontal operation is very easy by folding down the vertical head. The guideways are regularly lubricated by the central lubrication system. The Kunzmann has been mechanically and electrically inspected by us. Take advantage of the opportunity to inspect and test the Kunzmann on-site with power connected. There are 5 identical Kunzmann WF4/3 milling machines available from a vocational school. The machines are available immediately.

Condition: excellent (used), Year of construction: 2008, functionality: fully functional, Tool milling machine Kunzmann WF4/3 with Heidenhain TNC 320 CNC control in very good condition, CE-compliant, from a training workshop! Technical data: >> Year of manufacture 2008, Machine No. 347140 >> Fixed angular table >> Speed: continuously variable up to 4500 rpm Nsdpfsz Eh Uzox Af Sjdb >> Feed rate continuously variable in 3 axes from 0 to 2000 mm/min >> Rapid traverse X and Y axis 5000 mm/min >> Rapid traverse Z axis 4000 mm/min >> Travel distances X/Y/Z: 400/350/400 mm >> Table surface: 650 x 350 mm >> Table load: 250 kg >> Quill stroke vertical: 60 mm >> Vertical quill and horizontal quill - SK40 >> Hydraulic clamping system >> Weight approx. 1800 kg >> Space requirement approx.: 2.3 x 2 x 2 m >> Drive power: 15 KVA Accessories and equipment: >> Heidenhain TNC 320 CNC control >> Hydraulic chuck vertical and horizontal >> Automatic central lubrication >> Spindle brake >> Technical documentation, spare parts diagrams, operating manual for the control and programming examples >> Handwheels >> Coolant system (not shown in the pictures) About the machine: Offered is a tool milling machine Kunzmann WF4/3 with a Heidenhain TNC 320 CNC control. This universal milling machine is in very good condition and has only a few operating hours. It comes from a company where it was only used for training purposes. It has a very easy-to-use control. Furthermore, the machine has a hydraulic chuck in both vertical and horizontal positions. Changing from vertical to horizontal is very easy by folding down the vertical head. The guides are regularly lubricated by the central lubrication system. The Kunzmann has been mechanically and electrically inspected by us. Take the opportunity to inspect and test the Kunzmann on site while it is powered up. There are 5 identical Kunzmann WF4/3 milling machines available from a vocational school. The machines are available immediately.

Condition: excellent (used), Year of construction: 2008, functionality: fully functional, Tool milling machine Kunzmann WF4/3 with Heidenhain TNC 320 control system, in very good condition, CE-compliant, from a training workshop! Technical data: >> Year of manufacture 2008, machine no. 347138 >> Fixed angular table >> Speed: continuously variable up to 4500 rpm >> Feed rate continuously variable in 3 axes from 0 to 2000 mm/min >> Rapid traverse X and Y axes 5000 mm/min >> Z axis 4000 mm/min >> Travel distances X/Y/Z: 400/350/400 mm >> Table surface: 650 x 350 mm >> Table load: 250 kg >> Quill stroke vertical: 60 mm >> Vertical quill and horizontal quill - SK40 >> Hydraulic clamping system >> Weight approx. 1800 kg >> Space requirement approx.: 2.3 x 2 x 2 m >> Drive power: 15 KVA Accessories and equipment: >> Heidenhain TNC 320 control system >> Hydraulic chuck vertical and horizontal >> Automatic central lubrication >> Spindle brake >> Technical documentation, spare parts diagrams, operating instructions for the control system and programming examples >> Handwheels >> Coolant system (not shown in the pictures) About the machine: Offered is a Kunzmann WF4/3 tool milling machine with a Heidenhain TNC 320 control system. This universal milling machine is in very good condition and has only a few operating hours. It comes from a company where it was only used for training purposes. It has a very easy-to-use control system. Furthermore, the machine has hydraulic chucks for vertical and horizontal operation. Switching from vertical to horizontal operation is very easy by folding down the vertical head. The guides are regularly lubricated by the central lubrication system. The Kunzmann has been mechanically and electrically inspected by us. Take the opportunity to inspect and test the Kunzmann on site while it is powered up. There are 5 identical Kunzmann WF4/3 milling machines available from a vocational school. The machines are available immediately. Ndsdpfx Asz Eh Ubsf Ssb

Condition: good (used), Year of construction: 1975, Deckel FP2 FPS retrofitted tool milling machine with a 3-axis Heidenhain digital display. The machine is in good condition and comes from a training department. It features a fixed table, electrically interlocked milling head guard, and an SK 40 spindle mount. Accessories include various collets and milling arbors. It is in good, operational condition. A demonstration under power can be arranged. Ndsdpfx Afezac Sbe Seb

Condition: used, Year of construction: 1999, operating hours: 19,500 h, functionality: fully functional, machine/vehicle number: 85525, travel distance X-axis: 1,760 mm, travel distance Y-axis: 500 mm, travel distance Z-axis: 600 mm, feed rate X-axis: 30 m/min, feed rate Y-axis: 30 m/min, feed rate Z-axis: 30 m/min, spindle speed (max.): 6,000 rpm, type of input current: three-phase, total width: 2,900 mm, total height: 3,100 mm, total length: 3,800 mm, table length: 2,030 mm, table width: 500 mm, table load: 900 kg, tank capacity: 290 l, tool length: 250 mm, tool diameter: 180 mm, Equipment: documentation/manual, rotational speed infinitely variable, 4 axes 36 tool stations SK40 Pendulum operation with partition wall 2x swiveling bridges Ndjdpfx Aexup Iqef Seb Coolant tank 290 l with belt filter Control unit Heidenhain TNC 410 MA A-drive RTA 200/300

Condition: used, Year of construction: 2011, machine/vehicle number: 17, total height: 2,800 mm, total width: 3,090 mm, total length: 9,100 mm, overall weight: 4,200 kg, ALTECH TANGO 2 CNC Milling Machine CNC milling machine suitable for processing aluminum and wood. The machine features an X-axis travel of 6,900 mm and can be used along its entire length or in 2 separate work areas. - 8 tools - 11 kW spindle - Suitable for aluminum and wood - Complete with PC and programming software Ndsdpfjzvp Elsx Af Ssb The machine can be inspected while in operation.

Condition: excellent (used), Year of construction: 1983, functionality: fully functional, feed length X-axis: 560 mm, travel distance X-axis: 400 mm, travel distance Y-axis: 500 mm, travel distance Z-axis: 400 mm, overall weight: 2,500 kg, Metal milling machine DECKEL, type FP4 NC, Heidenhain control, year of manufacture 1983, table size 900 x 530 mm, including a large number of tools. Working area and travel ranges: X-axis (longitudinal): 560 mm, Y-axis (transverse): 500 mm, Z-axis (vertical): 400 mm (some tables or versions indicate up to 450 mm). Table size (standard tilting table): approx. 900 x 530 mm. Milling spindle & drive: Tool holder: SK 40. Speed range: 31.5 to 3150 rpm (geometrically stepped via manual or mechanical gearbox). Quill stroke: Vertical quill extendable by 80 mm, horizontal quill 65 mm. Spindle motor power: approx. 2.7 kW to 4.0 kW. Nodpfjzg Axmjx Af Sodb

Condition: new, Year of construction: 2026, We have various kinds of ball grinding mill such as batch ball mill, rod mill, cement ball mill, mining ball mill, welcome to contact our team for further details according to your specific requirements. Nodjq I Nw Iopfx Af Sedb

Year of construction: 1988, condition: used, Rated current: 25A, control voltage: 24V, operating voltage: 380V, control: DECKEL Dialog 2, weight: approx. 1.8t, without clamping systems or tools, Z-axis scale defective, screen display partially incorrect, not operational, an on-site inspection is possible. Njdpsz Ea Sfsfx Af Sodb

Year of construction: 2014, condition: used, X-axis: 2000mm, Y-axis: 1200mm, Z-axis: 1500mm, table surface: 2200x1200mm, number and width of T-slots: 7x22mm, distance between T-slots: 140mm, max. workpiece weight on table: 7.2t, working feed rate: 0-12,000mm/min, rapid traverse: 15m/min, acceleration: 1.5m/s², hydraulic unit power: 5.5kW, pump flow rate: 25l/min, working pressure: 110bar, tank capacity: 180l, cooling unit capacity: 6,100W, compressor power: 2.61kW, length: 5820mm, width: 6723mm, height: 3602mm, weight: 17t, spindle operating hours: 5,000h, with documentation, an on-site inspection is possible. Ndedpfx Afez Ea Rzs Seb

Condition: like new (used), Year of construction: 2001, Retrofitted: 2026 Numerical control: HEIDENHAIN TNC-426 Technical features Dimensions Table dimensions: 6000 x 1000 mmNumber of T slots: 7T slots dimensions: 22 mm Traverses of axis Longitudinal traverse X: 5300 mmVertical traverse Y: 1050 mmTransversal traverse Z: 1500 mmVertical capacity (VC): 80 - 1130 Milling head Head type: Fixed frontalTool clamping system: HydraulicTaper nose: ISO 50 (DIN 69871)   /   Pull stud: DIN 69872-BSpeed range: 60 - 3000 rpmSpindle power: 22/30 kW Feedrates Feedrate: 5000 mm/minRapid feedrate (X,Y,Z): 10000 mm/min Weight and dimensions Maximum weight on table: UndeterminedMachine weight approximate: 43000 kgMachine dimensions approximate: 11560 x 6150 x 3538 mm Accessories Guarding: 2 front sliding doorsAutomatic tool changer: ATC40Chip conveyor: 2 longitudinals hinge typeElectronic handwheel: HR-410Coolant: External Sale conditions Warranty: 6 months mechanical partsPrice and sale conditions: On request View all technical features Njdpfxsugbrqo Af Sjdb

Condition: ready for operation (used), Year of construction: 1982, feed length X-axis: 1,300 mm, feed length Y-axis: 700 mm, feed length Z-axis: 550 mm, spindle speed (max.): 2,066 rpm, overall weight: 4,000 kg, 3-axis visual accuracy Table size: 1635 x 460 mm Travel: 1300 x 700 x 550 mm Maximum spindle speed: 2066 rpm Weight: 4000 kg Njdezh Ht Djpfx Af Sjdb

Condition: used, Year of construction: 2013, operating hours: 10,322 h, functionality: fully functional, machine/vehicle number: NL254130510, We are offering this used DMG MORI NLX 2500 SY/700 CNC turning and milling center, manufactured in 2013, complete with a short bar loader magazine ILS-MKU 70/100, manufactured in 2015. Turning diameter max. 366 mm Turning length 705 mm Swinging diameter over bed 920 mm Swinging diameter over cross slide 742 mm Spindle speed range - main spindle 3,500 rpm Drive power - main spindle 18.5 / 15 kW Spindle nose JIS A-8 Ndedpfezwvv Tsx Af Seb Spindle bearing diameter 140 mm Spindle bore 90 mm Max. usable bar diameter 80 mm Spindle speed range - counter spindle 6,000 rpm Drive power - counter spindle 11 / 7.5 kW Spindle nose JIS A2-5 Spindle bearing diameter 85 mm Spindle bore 43 mm Max. usable bar diameter (-) mm X-axis travel 260 mm Z-axis travel 795 mm Y-axis travel +/- 50 mm Rapid traverse (X / Y / Z) 30 / 10 / 30 m/min Number of tool positions 12 Tool holder BMT 60 Spindle speed range - driven tools max. 10,000 rpm Drive power - driven tools 5.5 / 3.7 kW Total power consumption 40 kVA Machine weight approx. 6.4 t Short bar loader magazine ILS-MUK 70/100 Type: MUK 10016-II Year of manufacture: 2015 Material diameter: 6-100 mm Material length: 250-1650 mm Length: 2400 mm Width: 1600 mm Outreach: 330 mm Weight: approx. 680 kg If you have any questions or require further information, please feel free to send us a message or call us.

Condition: excellent (used), Year of construction: 1985, functionality: fully functional, spindle speed (max.): 2,000 rpm, spindle speed (min.): 80 rpm, type of input current: three-phase, input voltage: 400 V, Equipment: rotational speed infinitely variable, Universal milling machine Deckel FP1 – Very good condition For sale is a Deckel FP1 universal milling machine in very good, well-maintained condition. The machine is equipped with a 3-axis digital display Heidenhain TNC 113 and stepless feed in all three axes. The Deckel FP1 is known for its precision, reliability and durability and is ideal for toolmaking, single-part production, repair work and training companies. Technical data Manufacturer: Deckel Model: FP1 Year of manufacture: 1985 Machine number: 15082 Spindle speed: 80–2,000 rpm Drive power: 1.6 / 2.0 kW Stepless feed in X, Y and Z axis Rapid traverse in all three axes Travel ranges (X/Y/Z): 300 / 160 / 340 mm Fixed angular table Vertical milling head on spindle head, adjustable by 100 mm Vertical and horizontal spindle with SK40 collet Clamping system: S20x2 Spindle brake Space requirement: 1.30 m x 1.10 m x 1.60 m (L x W x H) Machine weight: approx. 850 kg Equipment - 3-axis digital display Heidenhain TNC 113 - Hydraulic vise - Coolant system - Operating manual Nedpfx Afszlnmme Ssdb The machine is in very good technical and optical condition and is ready for immediate use. An inspection and a test run can be arranged at any time by appointment.

Condition: like new (used), functionality: fully functional, Tool milling machine Deckel FP 4 MK Type 2203 Njdpfezvxlhjx Af Sedb Equipped with a hydraulic tool clamping system and central lubrication.

Condition: excellent (used), Year of construction: 2011, operating hours: 7,541 h, functionality: fully functional, spindle motor power: 25,000 W, spindle speed (max.): 5,000 rpm, spindle bore: 65 mm, type of input current: three-phase, total height: 2,067 mm, total length: 5,671 mm, total width: 2,721 mm, overall weight: 8,000 kg, spindle diameter: 250 mm, Equipment: documentation/manual, Main spindle: 25 kW, 5000 rpm, SMW Autoblock chuck diameter: 250 mm, bar diameter: 65 mm. Counter spindle: ISM52, 20 kW, 6000 rpm, SMW Autoblock chuck diameter: 210 mm. Turning and milling spindle (B-axis): HSK63A, 18000 rpm, external/internal coolant with high-pressure flushing at 20 bar. Ndedpfx Aez Dpm Nef Seb Direct axis measurement. Tool magazine for 24 tools. Chip conveyor, extraction system with filtration. The delivery includes various HSK63A tool holders. Direct sales to end users only. W-Technology s.r.o. Polní 8 79201 Bruntál Czech Republic

Condition: excellent (used), Year of construction: 2019, functionality: fully functional, Niles N 40 MC - 6000 Turning/Milling Center, year of manufacture 2019, Siemens SI 840 D SL control, X/Z 850/6820 mm, Y axis -200 / +400 mm, B axis 0.001°, B axis swivel range -105° / +95°, tool changer with 192 positions, C axis main spindle 0.001°, spindle speed up to 1750 rpm, 2 gear stages, max. workpiece weight between chuck and tailstock 6,000 kg, drive power 87 kW, HSK 100 interface, steady rest 70 - 425 mm, tailstock. Ndjdpfx Aez Dgw Sof Sjb

Condition: good (used), Year of construction: 2023, functionality: fully functional, The machine is in good technical condition, testing can be arranged by prior agreement. Ndsdez A T Hkjpfx Af Sob

Condition: ready for operation (used), functionality: fully functional, color: grey, Year of construction: 1988, Aeroplex fluidised bed counterjet mill 400 AFG The plant is fully functional and can be inspected on site. Trial milling can be carried out in advance depending on the material. In 2005, the plant was modernised and converted to load cells. Electrical control system: Simatic S7-300 The plant consists of the following units: 1. Mill Ndedpfjx T Ar Nex Af Ssb 2. Raw material filling unit 3. Air filter 4. Electrical switchgear