Used Isel Milling Machine for sale (65,060)

Condition: used, Year of construction: 2016, Control Heidenhain x-travel 800 mm y-travel 1.020 mm z-travel 1.020 mm Condition: Used The machine has been overhauled by GROB. Technical features & accessories: Bsdpfx Asz Hz Nhef Ajwu - HYFRA cooling unit - KNOLL KF-220 belt filter - KNOLL 750K-1 chip conveyor - TM218-9 tool magazine - SCHULER LMC900 automatic pallet loader - 10 pallet stations - Movable robot arm Accessories, tools, and workholding devices shown are included in the scope of delivery only if specified in the additional information. Subject to change, errors in technical data/specifications, and prior sale.

Condition: good (used), Year of construction: 1998, Ref. -No.: 10583 Manufacturer: MTE Type: BF 4200 Year of construction: 1998 Type of control: CNC-Steuerung Control: Heidenhain TNC 426 Storage location: Halberstadt Country of origin: Germany X-Travel: 4000 mm Y-Travel: 1200 mm Z-Travel: 1500 mm Turning Speeds: 2.500 RPM Rapid Traverse X/Y/Z: 400 m / min Bodszx Nybopfx Af Ajwu Table surface area (LxW): 4200 x 1000 mm Tool changer: 40 Table load max.: 13.000 kg Tool Taper: SK 50 Weight: 20 t Number Of T-Slots: 7 Pcs Width of the T-slots: 22 mm Distance between the grooves: 140 mm Further information: - Heidenhain HR410 handwheel - 3D scanner, infrared - The ball screw on axes Z and Y runs clamped and supported on combined radial/axial roller bearings and radial ball bearings with 250 N/sqm stiffness. The machine can be viewed while powered up.

Year of construction: 2011, condition: ready for operation (used), - USED - TRAVELLING COLUMN CNC MILLING MACHINE WITH ROTARY AND SHIFTING TABLE LONGITUDINAL TRAVEL: 8000 mm TRANSVERSAL TRAVEL: 1500 mm VERTICAL TRAVEL: 2500 mm RAPID FEEDS L-T-V: 35 m/min TABLE SIZE: 2000 x 2000 mm TRANSVERSAL TRAVEL OF THE TABLE: 1500 mm Bedowl R Agopfx Af Aowu MAX ADMITTED LOAD: 15000 Kg HEAD: A/B AXIS AUTOMATIC ; CONTINUOUS ; ISO 50 ; 7000 rpm; 49 kW; 1180 Nm TOOL MAGAZINE: CHAIN-TYPE ; 80 POS CONTROL UNIT: HEIDENHAIN iTNC 530 ACCESSORIES: SWARF CONVEYOR ; PORTABLE HANDWHEEL ; LASER TOOL SETTER NOTE: WITH ROTARY TABLE 1500X1500 mm; MAX ADMITTED LOAD 15000 Kg

Condition: ready for operation (used), Year of construction: 1995, Technical data HERMLE UWF 1202 H Travel in X-axis: 850 mm Travel in Y-axis: 630 mm Travel in Z-axis: 500 mm Table size: approx. 1,200 × 550/560 mm Max. table load: 700 kg Bwsdez H Azrepfx Af Aeu Spindle mount: SK 40, DIN 69871 Spindle speed: 20–5,000 rpm Spindle power: approx. 11.5 kW Tool changer: HTC, 34 positions Control system: Heidenhain TNC 426 Total power consumption: 22 kW/kVA Weight: 6,800 kg

Condition: used, Year of construction: 1933, x-travel 1600 mm y-travel 1259 mm Bwedoz Aun Sspfx Af Aou z-travel 1500 mm tool adaptor SK 50 weight 10,5 t output 49 kw feed 6000 m/min control Heidenhein 151 1600 min table: 1250-1400 mm serial number 1933 weight of the machine ca. 10,5 t

Condition: good (used), Year of construction: 2018, travel distance X-axis: 800 mm, travel distance Y-axis: 305 mm, travel distance Z-axis: 406 mm, spindle speed (max.): 5,100 rpm, spindle speed (min.): 10 rpm, table width: 230 mm, table length: 1,245 mm, type of input current: three-phase, overall weight: 950 kg, input voltage: 380 V, Used turret milling machine Brand: Optimum Model: OPTIMILL MF 2V Year: 2018 Weight: 950 kg Swiveling head with Siemens variable speed drive. 3-axis dimension display. Type: Turret milling machine with swiveling head ±90° (left/right) and tilting ±45°. Spindle taper: ISO 40 (DIN 2080 / DIN 69871) Speeds: Continuous electronic variable speed drive (typically 10 to 5,100 RPM). Table surface: 1,245 x 230 mm Travel (X / Y / Z): 800 mm / 305 mm / 406 mm Motor power: 3.7 kW (Three-phase 380V) Automatic quill feeds: 3 Automatic motorization in X and Y axes with variable speed control and rapid traverse mode. Bwsdpfx Asz Ducvjf Aeu Machine complies with CE regulations.

Condition: new, Year of construction: 2023, Hammer Mill with electrical box and cyclone filter for sale. The machines has a CE certificate. Technical parameters: Electric motor power: 45Kw Capacity: 1500-2000kg/hour Machine size: 1750mmx900mmx1550mm. Bwedpjxf Nw Hsfx Af Asu Weight 1300kg. Located Locally in Hungary (EU)

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 Bwsdpfx Afsz Dtw So Aou - 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 - 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 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. Bwodpfoz Eh Tqsx Af Asu There are 5 identical Kunzmann WF4/3 milling machines available from a vocational school. The machines are available immediately.

Condition: ready for operation (used), functionality: fully functional, ARBOGA UM 3008 / Drilling and Milling Machine -Spindle speeds / 8 stages / 105 - 3020 rpm -Gear / Gear head / Swiveling and tilting -Tool holder MK 3 -Drilling capacity / Steel max. 30mm -Drilling depth / Quill stroke approx. 130mm Bedpfx Afjz Hy Hre Aowu -Max. distance - Spindle / Table approx. 600mm -Cross table 585x245mm, adjustable via crank Dimensions: L x W x H 0.9 x 0.8 x 1.9 meters / Weight approx. 600 kg Errors and omissions excepted.

Condition: excellent (used), Year of construction: 2017, Sub-spindle, Y-axis, C-axis, B-axis FANUC 31i B5 NT-Smart control Turning diameter max 6400 mm Turning length -1150 mm Y-axis +/- 125 mm B-axis 1100 mm Main-spindle speeds 3'500 rpm Sub-spindle speeds 3'500 rpm C-axis positioning accuracy 0.001° Milling head B-axis -120 / +105 ° Spindlespeeds 12'000 rpm Bodpfx Ajzz I N Tef Aowu Tool changer 120 positions Barloader IRCO ILS-Muk-10016II Workpiece pick-up attachment Tool breakage control device 3D measuring tracer Misc. accessories MARCELS MASCHINEN CH

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: Bwedpfx Aoz Eh Uujf Aeu 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. 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: Bwsdez Eh T Depfx Af Aju >> 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) 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! Bjdpfoz Eh Uzsx Af Aewu Technical data: >> Year of manufacture 2008, Machine No. 347140 >> 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 >> 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 Bwedoz Eh Ubjpfx Af Aeu 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.

Condition: good (used), Year of construction: 2001, functionality: fully functional, machine/vehicle number: 28820005482, travel distance X-axis: 1,000 mm, travel distance Y-axis: 800 mm, travel distance Z-axis: 500 mm, feed rate X-axis: 50 m/min, feed rate Y-axis: 50 m/min, feed rate Z-axis: 50 m/min, rapid traverse X-axis: 50 m/min, rapid traverse Y-axis: 50 m/min, rapid traverse Z-axis: 50 m/min, Equipment: documentation/manual, Dear Sir or Madam, Bwedpfx Aevx N Shef Asu We are selling a DMC 100 V hi-dyn machining center in good condition. Unfortunately, the year of manufacture is not written down, but we suspect it was 2001. Please see the pictures for further details; we are of course happy to answer any questions you may have. The system can be viewed with power on. The buyer must organize collection with a suitable truck. The system can be dismantled and removed by either the buyer or us (for an additional fee of €1,500).

Condition: good (used), Year of construction: 1999, travel distance X-axis: 3,000 mm, travel distance Y-axis: 2,500 mm, travel distance Z-axis: 1,150 mm, Control: Siemens 840 D Powerline Bedpfxjz Hbpbs Af Aewu Tool holder: HSK-A63 Max. rpm: 16,000 X-travel: 3,000 mm Y-travel: 2,500 mm Z-travel: 1,150 mm A-axis: +/- 100 mm C-axis: +/- 181.5 mm Table size: 3,000 mm x 2,500 mm Option: External blowing air Kinematics: Fork head

Condition: good (used), Year of construction: 2001, Boring/milling machine MECOF Performa, serial no. 05 01 06, year of manufacture 2001, HEIDEHAIN TNC 430M control, X/Y/Z 2,000/1,200/1,000 mm, table 2,200x1,150 mm, universal milling head TBA4, dust extraction, coolant system, control cabinets, filter systems. Bwjdsz Icfmepfx Af Asu

Year of construction: 1989, condition: used, Used Machine Year of Manufacture: 1989 Features and Technical Specifications: - Diamond polishing and milling machine - For high-gloss milling and polishing of straight plastic edges Bjdozpblqjpfx Af Ajwu - Suitable for PMMA (acrylic glass) and other thermoplastics - Diamond polishing and milling unit - Precision workpiece guidance - Robust welded steel construction - Power consumption: 1.5 kW - Supply voltage: 220 V - Mains frequency: 50 Hz Availability: available shortly Location: 63934 Röllbach

Condition: used, Year of construction: 1978, Technical details: table surface area: 1970 x 400 mm distance between table/spindle: min./max. 150 / 250 mm rapid traverse: 1 / 2 m/min revolution per minute: Frässpindel: 112 ... 1400 / 12 step U/min milling spindle taper: DIN 2019 = Nr. 40 (SK40) axial adjustment: manuell = 150 mm quill feed: 0,012 / 0,025 / 0,05 mm/U feed range - horizontal: Frässchlitten: 8...100 / 12 step mm/min total power requirement: ca. 8,4 (10,5 kVA) kW machine weight approx.: 3000 kg dimension machine xH: 3,05 x 2,7 x 2,0 m wedge-groove milling machine Bwjdpfx Afeu Ndhio Aju Application: Milling of straight and helical grooves. Multiple groove milling with automatic program sequence. Further features: - distance spindle axis / lower edge counterholder: 55 mm - axial movement of the counter bearing sleeve 50 mm - milling carriage movement horizontal 1000 mm (automatic + manual by hand) and vertical 100 mm by hand + max. 5mm automatic/hydraulic Equipment: - chip container 470x300x300mm - 2x oil collecting basins (3200x1500x70 and 3200x800x60mm) - some accessories/tools *

Condition: excellent (used), Year of construction: 2003, Sub-spindle, Y-axis, B-axis, C-axis SIEMENS 840D ShopMill Turning diameter max 246mm Turning length -445mm Spindle speeds main & sub-spindle -6'000 rpm Turret head: 12 driven positions B-Axis 440 mm Bodpfez Iaqgjx Af Aewu Tool presetting device Tool catching attachement Misc. accessories MARCELS MASCHINEN CH

Condition: good (used), Year of construction: 2008, Ref. -No.: 10621 Manufacturer: PAMA Type: Speedmat 3/TR16 Year of construction: 2008 Type of control: CNC-Steuerung Control: SIEMENS SINUMERIK 840 D PL Storage location: Halberstadt Country of origin: Italy X-Travel: 3500 mm Y-Travel: 2500 mm Z-Travel: 2200 mm W-Axis: 800 mm Bore Spindle Diameter: 160 mm Table Load: 12000 kg Tool Taper: ISO 50 BIG PLUS Turning Speeds: 3500 RPM Max. Torque: 2.765 Nm Rapid Travel X/Y/Z: 25000 mm / min Drive Capacity - Spindle Motor: 46 kW Internal cooling: 15 / 45 bar External cooling: 50 / 4 bar Table surface: 1600 x 2000 mm Spindle speed gear stage 1: 2.120 1 / min Spindle speed gear stage 2: 2.765 1 / min Further information: Bwodozc D Dwepfx Af Asu Automatic tool changer SK50 DIN 69871, 80 positions. Automatic angle milling head TS 35 with 360 positions, speed 2,000 rpm and torque 2,000 Nm. Automatic universal milling head TU25C (2-axis), speed 3,000 rpm and torque 800 Nm. Automatic accessory changer, 2+1 units. Touch probe (Renishaw). The machine can be inspected under power.

Condition: used, Year of construction: 1989, x-travel 400 mm y-travel 400 mm z-travel 400 mm table surface area 700 x 460 mm spindle taper SK 40 spindle turning speed range 31,5 -5000 U/min Bodpfx Aez Ekzkof Aowu spindle drive 5,5 kW quill stroke 80 mm vertical head swivelling +/- 90 ° control DIALOG 11 feeds x/y/z -stepless 3000 mm/min rapid traverse 6 m/min total power requirement 13,8 kVA weight of the machine ca. 2 t dimensions of machine L x W x H 2,73 x 2,0 x 2,0 m Accessories: solid table, vertical head with hydr. tool clamping and quil retraction, dividing unit HOFFMANN, RW/NC 125 L, coolant

Condition: good (used), Year of construction: 2004, Ref. -No.: 10634 Bodpfxjzx Nyzs Af Aewu Manufacturer: ANAYAK Type: P 3200 Year of construction: 2004 Type of control: CNC-Steuerung Control: Heidenhain Storage location: Halberstadt Country of origin: Germany X-Travel: 3200 mm Y-Travel: 1400 mm Z-Travel: 750 mm Table-Size (Lxw): 3200 x 1400 mm spindle running time: 23.291 H Control: 83.301 H machine: 73.907 H Program run: 27.807 H

Condition: excellent (used), Year of construction: 2005, functionality: fully functional, travel distance X-axis: 1,600 mm, travel distance Y-axis: 2,200 mm, travel distance Z-axis: 900 mm, spindle speed (max.): 18,000 rpm, spindle nose: hsk 63, spindle motor power: 32,000 W, Longitudinal travel of the X-axis table: 1,600 mm Transverse travel of the Y-axis ram: 2,200 mm Vertical travel of the Z-axis head: 900 mm Head tilt travel (A-axis): ±105° Table rotation travel (C-axis): 360° Table size: 1,200 x 1,200 mm Table load capacity: 3,000 kg Distance between columns: 1,550 mm Maximum spindle power: 32 kW at 2,000 rpm Maximum spindle torque: 103 Nm Maximum spindle speed: 18,000 rpm Spindle mounting: HSK63A Linear axis travel speeds (X-Y-Z): 45 m/s Bwsdpfx Ajz Ib U Hef Aju Acceleration of X-Y-Z axes: 4.5 m/s² Tool magazine with 60 positions External coolant supply for the tool, 4 bar Spray mist coolant No. 2 screw conveyors + No. 1 transverse conveyor FIDIA C10 numerical control Full enclosure CE standards