Cilindrični Brusilni Stroj - Universal nakup rabljenega (31.752)

Stanje: zelo dobro (rabljeno), Leto izdelave: 2013, Siemens Sinumerik 840D CNC control Maximum workpiece diameter: 250 mm Ppodpjwwtq Dofx Altsw Maximum workpiece length: 1500 mm Maximum workpiece weight: 150 kg Internal grinding attachment Paper band filter Centre spike Diamond dressing disc Grinding wheel change assistant

Stanje: dober (rabljeno), Leto izdelave: 1974, Digital display Grinding diameter 250 mm Grinding length 650 mm Ppjdpfewpya Nex Altjw Accessories

Stanje: novo, Leto izdelave: 2026, Funkcionalnost: popolnoma funkcionalen, višina središča: 250 mm, teža obdelovanca (maks.): 750 kg, dolžina brušenja: 2.000 mm, premer brusilnega koluta: 500 mm, skupna širina: 2.000 mm, skupna dolžina: 6.000 mm, skupna višina: 2.000 mm, premer brušenja: 320.400.500 mm, hod vretena: 50 mm, teža obdelovanca med konicami: 500 g, razdalja med središči: 2.200 mm, premer obdelovanca med konicama: 500 mm, največja hitrost vretena: 560 obr/min, hitrost vretena (min.): 1 obr/min, dolžina podajanja os Z: 2.500 mm, hitrost vretena za brušenje: 1.400 obr/min, skupna masa: 8.000 kg, trajanje garancije: 24 meseci, največja hitrost vretena obdelovanca: 560 obr/min, Oprema: vrtilna hitrost brezstopenjsko nastavljiva, Technical Main Data: Swing diameter: mm 320, 400, 500 Distance between centers: mm 1000, 1500, 2000, 3000 Maximum workpiece weight between centers: kg 500 Maximum workpiece weight between centers (cantilevered, incl. standard grinding wheel): mm 500 (600 mm optional) Peripheral speed: m/sec 45 Workpiece spindle taper, in tailstock quill: Morse 5 Infinitely variable spindle speed control: rpm 1–560 Minimum programmable increment - in X axis (related to diameter): mm 0.001 - in Z axis: mm 0.005 Table swiveling range: ° +6 / –4 Grinding wheel head swiveling range: ° ±30 Workpiece headstock swiveling range: ° 90 Grinding spindle drive motor: kW 11 Pjdjpy A Iuepfx Altjpw Workpiece headstock drive motor: kW 2.5 Total motor power: kW 15 Pneumatic supply: kPa 0.6 Machine weight: kg approx. 8000

Stanje: pripravljen za uporabo (rabljen), Leto izdelave: 2017, obratovalne ure: 20.995 h, Funkcionalnost: popolnoma funkcionalen, številka stroja/vozila: W11106617/144, dolžina brušenja: 1.000 mm, premer brusilnega koluta: 400 mm, premer brušenja: 390 mm, hitro pomikanje X-os: 12 m/min, hitri pomik os Y: 12 m/min, TECHNICAL DETAILS Grinding length: 1,000 mm Grinding diameter: 0–390 mm Internal and external grinding: up to 1 m Max. workpiece weight (overhung, Morse taper 4): 100 Nm Max. workpiece weight (between centers): 250 kg X-axis Traverse Rapid traverse: 350 mm Rapid feed rate: 12 m/min Fine-feed increment: 0.0001 mm Z-axis Traverse Max. travel path: 1,150 mm Travel speed: 12 m/min Measuring system resolution: 0.0001 mm Spindle Data Internal grinding spindles: 80 x 350 mm Grinding Spindle Headstock Grinding wheel diameter: 400 mm Drive power: 5.5 – 7.5 kW Ppjdpfx Asw Nwxuoltjw Peripheral speed: 25 – 50 m/s Workpiece Headstock Speed range: 1 – 1,000 rpm Internal chuck mount: MK4 Centering diameter: 63 / 80 mm Tailstock Quill taper: MK4 Quill stroke: 45 mm Filtration and Extraction Paper band filter system: 350 l container Mechanical mist extraction: 600 m³/h MACHINE DETAILS Operating hours: 20,995 h EQUIPMENT Full enclosure Manual balancing system Touch-trigger longitudinal positioner Leveling shoes for alignment Grinding centers MK 4 solid carbide, full and half points Diamond dressing tool 0.5 carat

Stanje: pripravljen za uporabo (rabljen), Centre height: 130 mm Centre distance: 500 mm Ppsdpfsvf Dmtex Altjw Grinding wheel dimensions: 127/300 x 40 mm Grinding wheel speeds: 2 rpm Electrical connection: 380 V, approx. 4 kW Space requirement: 1730 x 1100 x 1550 mm Weight: approx. 1,750 kg

Stanje: delavnici obnovljeno (rabljeno), Leto izdelave: 1992, Funkcionalnost: popolnoma funkcionalen, višina središča: 150 mm, dolžina brušenja: 620 mm, širina na sredini: 680 mm, premer brusilnega koluta: 350 mm, skupna širina: 500 mm, Condition of the machine: The machine is currently in a used, non-refurbished condition. The following work will be carried out on the machine: - Complete dismantling of the entire machine down to the guideways - Replacement of all seals and wear parts throughout the machine - Replacement of the X-axis feed screw - Replacement of the main bearings of the workpiece spindle - Replacement of the grinding spindle - All assemblies of the machine will be restored to a like-new condition Geometry: - Hand scraping of the X-axis guideway - Hand scraping of the Z-axis guideway - Grinding of the X-axis table - Grinding of the Z-axis table - Grinding of the upper tables Ppodpfsrz Nflsx Altsw - Grinding of the assembly housings (workpiece spindle headstock, grinding spindle headstock, and tailstock) - Preparation of a measurement protocol for the TSCHUDIN cylindrical grinding machine Painting: The main assemblies will be newly painted; the rest of the machine will retain its original paintwork. Electronics: The entire machine's electronics will be inspected, tested, and any defective switches and cables will be replaced.

Stanje: novo, Leto izdelave: 2025, Funkcionalnost: nepreverjeno, Vretenčni nosilec: MK5 Podporni nosilec: MK3, hidravlični Višina med centri: 100 mm Razdalja med centri: 650 mm Dolžina brušenja: 620 mm Brušno kolo: 500 x 80 x 203,2 Stanje stroja: CNC krožna brusilka bo v celoti razstavljena, na novo pobarvana, vodila bodo očiščena (vključno s popravkom geometrije), vsi obrabljeni deli in vretena (osi X in Z) bodo zamenjani, vse sklopne enote pa bodo obnovljene v skoraj novo stanje. Krmilnik Marposs E-14 bo zamenjan s krmilnikom SIEMENS ONE ali FANUC. Preizkušanje stroja bo izvedeno po protokolu TSCHUDIN. Dodatna oprema stroja: - 1 kos krmilnika SIEMENS ONE ali FANUC z integrirano funkcijo varnosti - 1 kos ročnega krmilnika z ročnim kolesom za ročno pozicioniranje osi - 1 kos vretenčnega nosilca MK5 - 1 kos podpornega nosilca MK3, hidravličnega - 1 kos sistema za nadzor razmika - 1 kos prirobnice brušnega kolesa - 1 kos zaščitnega pokrova z nadzorom vrat - 1 komplet strojnega orodja in dokumentacije Podpfx Ajcwulujltepw Stroj nima delovnih ur in je bil v celoti obnovljen z novim krmilnikom SIEMENS ONE ali FANUC.

Stanje: generalkompletno obnovljen (rabljeno), Leto izdelave: 2026, višina središča: 100 mm, širina na sredini: 680 mm, skupna dolžina: 620 mm, premer brušenja: 199 mm, Condition of the machine: The machine is currently in used, non-refurbished condition. All wear parts of the machine will be replaced, including the X-axis feed spindle, and all assemblies will be brought to a like-new condition. After refurbishment, the machine is easily comparable to a new machine. Geometry: Ppodpfx Alev Hqlrstsw The machine will be completely disassembled except for the guideways. Before restoring the geometry of the individual tables and assemblies, the guideways of both the Z and X axes will be hand-scraped and restored to like-new condition. Upon completion of these works, the machine will receive a measurement report according to the original manufacturer's specifications. Electronics: The electronics and the control cabinet enclosure will be completely replaced. All electrical components will be renewed, including the motors. Hydraulics: The entire lubrication system, including the lubrication unit, will be replaced. The hydraulic unit will be overhauled, and the hydraulic lines will be replaced with new ones. Painting: Once the geometry of the machine has been restored, it will be prepared for repainting. All covers, tables, and the machine bed will be stripped of old paint, cleaned, and newly coated. Technical data of the machine: Centre height: 100 mm Centre width: 680 mm Grinding length: 620 mm Grinding wheel: 350 x 50 x 127 Machine weight and footprint: 2600 kg // 2320 x 1400 x 1450 mm Standard equipment: • 1 pc. grinding spindle head Ø35 • 1 pc. workpiece spindle head MK5 • 1 pc. safety cover for discs Ø400 mm • 1 pc. tailstock MK3 standard • 1 pc. flange Ø127 mm • 1 pc. hydraulic unit • 1 set of operating tools and operating manual

Stanje: zelo dobro (rabljeno), Krmilnik FANUC 21i-T Višina konic: 175 mm Razdalja med konicama: 1000 mm Brusna glava os B: 1° Brusni kolut: 500 x 63 x 203 mm Hitrost brusnega koluta: 1.500 vrt/min Ppjdpfx Aljyabt Dotsw Naprava za notranje brušenje: 60.000 vrt/min Glava delovnega vretena os C: 0,001° Merilna tipalka Avtomatska balansirna naprava Naprave za oblikovanje brusov Razni dodatki MARCELS MASCHINEN AG

Stanje: dober (rabljeno), Leto izdelave: 2011, Funkcionalnost: popolnoma funkcionalen, številka stroja/vozila: 6860 0007, Please provide us with your offer price. Sale only within the European Union (EU), including Switzerland, Turkey, and Great Britain. ----- Ppodpfxevbgiie Altow Scope of delivery: Machine, loading system, conveyor belt, workpiece carriers Technical data of the machine: 5-axis grinding center including oval feed belt and loading gantry 12-position tool changer with HSK 63 Maximum travel distance X-axis: 500 mm Maximum travel distance Y-axis: 650 mm Maximum travel distance Z-axis: 650 mm Table size: 500 x 650 mm Cut detection Nordmann dressing spindle Oil supply via central factory supply

Stanje: rabljeno, Grinding diameter: 350 mm Grinding length: 1,500 mm Centre height: 175 mm Grinding wheel diameter: 500 mm Overhauled according to Kellenberger guidelines, including new, modern, and future-proof control system. New servo motors in X-axis and for the workpiece spindle head. Photo shows a previously delivered machine in standard configuration. - Operation via touch panel is extremely user-friendly. - The symbolism on the control panel is virtually identical to the original control system, eliminating the need for retraining. - Diagnostic function with display of PLC notifications and the digital I/O - Dressing function can be expanded or modified according to customer requirements. - Optionally, workpiece spindle can be stopped in a defined orientation. - New maximum infeed of 40 mm, expandable upon request. - Digital readout in 2 axes. Resolution in X-axis: 0.5 µm Options: - Encoder with digital display in the workpiece spindle head - Encoder with digital display in the grinding spindle head (height adjustment with spindle not possible) - New robust internal grinding attachment, diameter 80 mm or 100 mm, with height adjustment. - Increase in centre height to a maximum of 225 mm - Speed control for the grinding spindle Included: - Operating tools - Clamping tube for chuck Further accessories available upon request. Pjdpfeuwv Idsx Altopw The machine features an electronically controlled infeed system in the X-axis with stepper motor drive. Hydraulic longitudinal table movement and rapid traverse. Versatile application in production for external and internal cylindrical grinding, or combined external, face, and internal grinding in a single setup for individual parts. Available options: - Semi-automatic dressing cycles for external and internal grinding - Automatic dressing compensation - Gauging control Please note: The machine tool currently does not meet the basic safety and protection requirements as stipulated in BetrSichV 2015. The required minimum safety level must be determined by means of a risk assessment according to BetrSichV.

Stanje: rabljeno, Grinding diameter: 250 mm Grinding length: 1000 mm Center height: 125 mm Grinding wheel diameter: 500 mm Grinding wheel width: 80 (100) mm Bore: 203.2 mm Workpiece spindle taper: MK5 Workpiece spindle speed: 20–400 rpm Workpiece headstock swiveling: +/- 360° Grinding spindle head swiveling: +/- 0° Incremental infeed: 0–9.99 mm/Ø Continuous infeed: 0–9.99 mm/Ø Table swiveling: +/- 10° Table speed: 0.02–6 m/min Workpiece weight between centers: 130 kg Max. workpiece weight (unsupported, including clamping): 130 kg Cross travel: 270 mm Tailstock quill taper: MK3 Quill travel: 30 mm Total power requirement: 5.5–7.5 kW Machine weight approx.: 2.7 t As a global leader in Kellenberger overhauls/retrofits, we can not only deliver machines in as-new condition with warranty, but we also offer service for your equipment. Geometrically refurbished and newly painted according to Kellenberger test protocol. Completely new electrics with new infeed control system. Photos show a previously delivered machine of the same model, but with 1500 mm center distance and a universal grinding head instead of 500 mm wheel head for external cylindrical grinding only. Equipment: - 2-axis digital readout - New DGS paper band filter Optional at additional cost: - Semi-automatic dressing - Dressing compensation - GAP control - Measuring automation - Safety doors Electronically controlled infeed system with stepper motor drive. Hydraulic table traverse and rapid movement. Powerful, non-swiveling grinding spindle stock for production external cylindrical grinding operations. Ppodpfx Aled Ih Egetsw Application areas: Machining of high-precision components for gear manufacturing, machine tool, and general mechanical engineering. Match grinding for the hydraulics industry. At this time, the machine does not meet the fundamental safety and protection requirements as specified in BetrSichV 2015. An assessment of the required minimum safety objective must be determined by a risk assessment according to BetrSichV.

Stanje: rabljeno, Grinding diameter: 350 mm Grinding length: 1500 mm Centre height: 175 mm Left grinding wheel: 600 mm Grinding spindle headstock fixed, not swivelling. Equipped with new FAGOR CNC control with BEMA cylindrical grinding interface. Featuring a new, service-friendly enclosure. Ppedpfx Ajt Ii Rfsltsw Fully overhauled according to Kellenberger measurement protocol.

Stanje: rabljeno, Leto izdelave: 1995, Premer brušenja 350 mm Dolžina brušenja 1000 mm Višina konic 175 mm Podpfx Ajxyadaoltjpw Generalno obnovljeno leta 2013 Ojačano glavno vreteno obdelovanca B-os brezstopenjsko nastavljiva Kontra-vreteno Brez vpenjalne glave in brez lunete na fotografiji Krmiljenje Kelco 90 Stroj je možno pri stranki v obratovanju ogledati do vključno januarja 2026.

Stanje: rabljeno, Leto izdelave: 1990, Premer brušenja 200 mm Dolžina brušenja 340 mm Višina konic 100 mm Ppodpfx Aljywnt Hotew Krmiljenje CNC Priključna moč 25 kVA Obratovalna napetost 110 / 220 / 3x165 / 3x380 VAC Krmilna napetost 24 VDC

Stanje: generalkompletno obnovljen (rabljeno), Leto izdelave: 2017, Funkcionalnost: popolnoma funkcionalen, širina brusilnega kolesa: 150 mm, premer brusilnega koluta: 305 mm, leto zadnje generalne obnove: 2025, Grinding wheel diameter 305 x 150 mm, workpiece diameter 1–40 mm. Machine for plunge and through-feed grinding, PLC control, coolant system, hardened and ground guideways, grinding and regulating spindle hydraulically mounted via 3-point support, hydraulically adjustable dressers for grinding and regulating wheel, regulating wheel drive adjustable via DS motor, new German-specification electrics with Siemens components, Siemens S7 control. Ppedpswi H Uaofx Altow

Stanje: rabljeno, Leto izdelave: 2008, Tukaj je nekaj ključnih podatkov: - CNC univerzalni cilindrični brusilni stroj WUG 21 osnovni stroj podjetja CNC-Technik Weiss. (WUG 21 je Karstensovo ležišče stroja, na katerega je zgrajen CNC.) - Leto izdelave 2008 / obratovanje največ v eni izmeni - Medkončna razdalja 1000 mm - Vpenjalno vreteno in konjiček MK4 - Premer diska do 500 mm - Položaj brusnega diska pod kotom 26,5° poševno - Pogon brusnega diska s programirljivim SUG - Brusilni vretenik ročno vrtljiv na zračnem ležišču Ppodpfx Aljxmurxjtew - Brusni disk na desni strani - Vgrajena notranja brusilna enota zadaj, vključno z naprav za oblačenje - Krmilje Eckelmann - DIN programiranje - Ciklni programi - Ročno brušenje, da - Avtomatsko oblačenje - Marposs zaznavanje vibracij za zunanji brusni disk vključno s programsko opremo - Brusilno vreteno in vreteno za obdelovanec z jermenskim pogonom

Stanje: rabljeno, Razdalja med konicami: 2.500 mm Višina konice: 250 mm Premer brusnega koluta: 600 mm Skupni pomik brusne podpore: 320 mm Število obratov vretena obdelovanca: 50 - 450 obr/min Podpfx Aljx Avtcotspw Vpenjanje: MK5 Konica konjička: MK Cilindrični brusilni stroj | NAXOS-UNION - W-500 Cilindrični brusilni stroj je bil leta 2017 popolnoma obnovljen (RETROFIT) pri KPS-Schleiftechnik (glej potrdilo naročila). Stroj je dobro vzdrževan. Za dodatne tehnične informacije glejte ponudbo.

Stanje: pripravljen za uporabo (rabljen), Leto izdelave: 1987, Funkcionalnost: popolnoma funkcionalen, dolžina brušenja: 630 mm, premer brušenja: 320 mm, Brez minimalne cene – zagotovljena prodaja najvišjemu ponudniku! TEHNIČNI PODATKI Maks. dolžina brušenja: 630 mm Maks. premer brušenja: 320 mm PODROBNOSTI O STROJU Proizvajalec: TOS HOSTIVAR Podpfoyvf S Nox Altopw Model: BHU 32 Leto izdelave: 1987

Stanje: pripravljen za uporabo (rabljen), Leto izdelave: 1993, External Cylindrical Grinding Machine Manufacturer: TOS Model: BUB 40-1000 Year of manufacture: 1993 Control system: Cetos K 51 WORKING RANGE – CYLINDRICAL GRINDING Maximum swing diameter: 400 mm Maximum workpiece weight between centers: 500 kg Maximum workpiece weight (single-sided clamping): 100 kg WORKING RANGE – EXTERNAL GRINDING Maximum grinding diameter: 400 mm Minimum grinding diameter: 10 mm Grinding length: 1000 mm TABLE – CYLINDRICAL GRINDING Swivel range (B axis): from 8.5° Rotation range B axis: up to -4.5° Longitudinal travel: 1200 mm WORKPIECE SPINDLE STOCK Swivel range (B axis): from 0° Rotation range B axis: up to 90° Spindle bore: 40 mm Number of gear steps: 2 Drive power: 9.5 kW Tool holder: MK 5 TAILSTOCK Quill stroke: 40 mm Psdpfxowp D Auo Altepw Quill taper: MK 5 Max. clamping force: 4 kN GRINDING SPINDLE STOCK Swivel range (B axis): from -15° Rotation range B axis: up to 45° GRINDING WHEEL Design: wheel Diameter (max): 500 mm Bore: 203 mm Width: 80 mm ELECTRICAL DATA Connected load: 16 kVA Connection voltage: 400 V Mains frequency: 50 Hz DIMENSIONS / WEIGHT Space requirement – left/right: 4700 mm Space requirement – front/back: 2050 mm Overall height: 1900 mm Total weight approx. 5400 kg ADDITIONAL EQUIPMENT (GRINDING) Balancing device: Yes Machine in well-maintained condition Workpiece spindle stock swivels 90° Grinding spindle stock swivels -15°, +45° Table swivels +8°30' - 4°30' Accessories: - Hydrostatic spindle - Various corundum grinding wheels - 2 diamond grinding wheels - Balancing head MPM, renewed in 2021 - Filtration unit - Extraction system

Stanje: dober (rabljeno), Leto izdelave: 1981, obratovalne ure: 16.769 h, Centre height 175 mm, centre distance 700 mm, swivelling angle of rotary table 10°, workpiece spindle head swivelling range 90°, speed range 30–675 rpm, Morse taper 5, grinding spindle head – grinding wheel diameter 400 mm, maximum width 50 mm, drive power 6.25 kW. Psdotz T H Dspfx Altjpw

Stanje: dober (rabljeno), Hydraulic Cylindrical Grinding Machine Pedpfx Aer E Azisltopw Centre height: 100 mm Centre distance: 500 mm Grinding wheel diameter min./max.: 200 - 300 mm 3 grinding wheel speeds: 2,250 – 2,420 – 2,680 rpm Workpiece spindle head: 8 adjustable workpiece speeds: 30 – 750 rpm Spindle taper or internal taper of the workpiece spindle: MT 4 Tailstock: Internal taper of quill: MT 3 Quill stroke: 30 mm Table: Maximum table swivel: +/- 6° Table speed, adjustable: 0.1 – 6.0 m/min Motor power: 3 kW Dimensions L x W x H: 1650 x 1350 x 1400 mm Weight: 1,900 kg Accessories / Special Features: • Manual or automatic operation • Automatic infeed • Grinding wheel flange with grinding wheel • Wet grinding equipment Siegfried Volz Werkzeugmaschinen Rüschebrinkstr. 151-153 DE - 44143 Dortmund-Wambel

Stanje: kot nova (razstavni stroj), Leto izdelave: 2025, Offered is a conventional universal cylindrical grinding machine EMAG Weiss Eco 200. This ultra-compact machine is especially designed for users who do not require CNC control but still demand the highest processing quality. The machine is easy to operate and offers excellent accessibility, allowing for quick setup and changeover. TECHNICAL DATA Workpiece diameter: max. 200 mm Workpiece length: max. 400 mm Centre height: 100 mm Workpiece weight: 30 kg Workpiece headstock – Mount: MT4 Tailstock – Mount: MT3 Grinding wheel diameter: max. 350 mm Pjdpfx Alstmqcwstopw Price, delivery time, and machine configuration upon request.

Stanje: kot nova (razstavni stroj), Leto izdelave: 2025, Offered is a CNC-controlled universal cylindrical grinding machine EMAG Weiss W 11 CNC. The machine is suitable for external, internal, face, and cylindrical grinding operations. The W 11 CNC cylindrical grinding machine is ideal for single-part, prototype, and series production. It is also used in training and maintenance departments. CONTROL SYSTEM Eckelmann TECHNICAL DATA Workpiece length: max. 1,500 mm Centre height: 200 mm | Option: 320 mm Workpiece weight: 250 kg Workhead: Morse taper 4 | Option: Morse taper 5 / Morse taper 6 Tailstock: Morse taper 4 TOOL CARRIER Single wheel machine, angular/straight, but also possible with 2 wheels with B-axis and internal grinding spindle. Ppsdpfjr Ey Husx Altew Price, delivery time, and machine configuration upon request.

Stanje: novo, Funkcionalnost: popolnoma funkcionalen, teža obdelovanca (maks.): 130 kg, širina na sredini: 600 mm, premer brusilnega koluta: 450 mm, skupna širina: 2.110 mm, skupna dolžina: 3.120 mm, skupna višina: 1.435 mm, premer brušenja: 350 mm, hod vretena: 30 mm, širina brusilnega kolesa: 50 mm, hitrost vretena za brušenje: 2.000 obr/min, skupna masa: 3.100 kg, Vitesse de broche de rectification : 1500 ou 2000 tr/min (changement de courroie manuel) Course axe Z : 750 mm Course axe X : 265 mm Puissance de broche de rectification : 3,7 kW Psdpfxec Tnq Ie Altepw Comprend les accessoires standards suivants : - Réservoir de liquide de refroidissement 120 litres avec pompe de 0,4 kW (200 l/min) et séparateur magnétique - Contre-pointe hydraulique - Tôle pare-éclaboussures amovible - Centrale hydraulique - Meule standard Ø 450 x Ø127 x 50 mm - 1 flasque de meule - 1 extracteur de flasque de meule - Support de dressage avec diamant sur la contre-pointe - 2 pointes de centrage - Comparateur pour l’alignement de la table à 0° - Éclairage machine - 3 crochets amovibles pour levage par grue - Vis de mise à niveau avec plaques de pose - Documentation machine Comprend également les accessoires spécifiques suivants : - Dispositif de rectification intérieure - Variateur (Mitsubishi) pour la régulation de la vitesse de la broche de travail - Variateur pour la régulation de la vitesse de la broche de rectification avec moteur 5,5 kW, incl. affichage - Affichage digital 2 axes Heidenhain ND 780