Star Micronics Sr-38B nakup rabljenega (2.619)

Stanje: rabljeno, TECHNICAL DATA - Number of axes: 7 - Number of spindles: 2 MAIN SPINDLE - Max. bar diameter: 20 mm - Max. machining length: 205 mm - Spindle speed: 10,000 rpm - Spindle drive power: 3.7 kW - Minimum C-axis resolution: 0.001° SUB SPINDLE - Max. bar diameter: 20 mm - Spindle speed: 8,000 rpm - Spindle drive power: 2.2 kW - Minimum C-axis resolution: 1° - Number of tool holders: 1 TOOL HOLDER 1 - Number of positions: 10 - Number of driven positions: 4 FRONT TOOL POST - Number of positions: 7 BACKWORKING - Number of positions: 4 - Number of driven positions: 4 - Driven tool speed: 8,000 rpm ELECTRICAL SUPPLY Hedpfx Agjy Dim Isxjl - Supply voltage: 400 V - Total drive power: 7 kW WEIGHT AND DIMENSIONS - Footprint: 2200 x 1200 mm - Machine height: 1700 mm - Machine weight: 2200 kg MACHINE HOURS - Power-on hours: 107,555 h - Operating hours: 91,025 h - Spindle hours: 54,783 h ACCESSORIES - Control: Fanuc 300is-model A - Driven guide bushing - Parts catcher - Parts conveyor belt - Parts ejector - Coolant tank - Bar feeder: FMB turbo 3-26 / 3200 A

Stanje: rabljeno, TECHNICAL DATA - Number of axes: 6 - Number of spindles: 2 MAIN SPINDLE - Max. bar diameter: 20 mm - Max. machining length: 205 mm - Spindle speed: 10,000 rpm - Spindle drive power: 3.7 kW - Minimum C-axis resolution: 0.001° SUB SPINDLE - Max. bar diameter: 20 mm - Spindle speed: 8,000 rpm - Spindle drive power: 2.2 kW - Minimum C-axis resolution: 1° - Number of bush holders: 1 BUSH HOLDER 1 - Number of positions: 6 FRONT TOOLING STATION - Number of positions: 8 - Number of driven positions: 4 Hjdpoy Dimzofx Agxol - Driven tool speed: 8,000 rpm SUBSEQUENT MACHINING - Number of positions: 4 - Number of driven positions: 4 - Driven tool speed: 8,000 rpm ELECTRICAL SUPPLY - Supply voltage: 400 V - Total power consumption: 7 kW WEIGHT AND DIMENSIONS - Footprint: 2,200 x 1,102 mm - Machine height: 1,700 mm - Machine weight: 2,200 kg OPERATING HOURS - Power-on hours: 94,549 h - Operating hours: 76,096 h - Spindle hours: 57,727 h ACCESSORIES - Control: Fanuc 18i-TB - Powered guide bushing - Parts catcher - Parts conveyor belt - Parts ejector - Coolant tank (with high-pressure pump) - Bar feeder: FMB TURBO2-20/3200A - Electrical transformer

Stanje: pripravljen za uporabo (rabljen), Leto izdelave: 1996, Splošni podatki Teža stroja: 2200 kg Višina: 1700 mm Hjdpfsx D Dwfex Agxsl Globina: 1200 mm Dimenzije Dolžina stroja: 2200 mm Ta triosni stroj Star SR 20 R III je bil izdelan leta 1996. Omogoča največji premer struženja 20 mm, hitrost vretena do 8.000 vrt/min in hitro pomično hitrost 35 m/min. Idealno za precizno struženje, omogoča šest fiksnih postaj za stružne nože ter pet radialnih pogonskih postaj. Če iščete visokokakovostne stružne zmogljivosti, razmislite o stroju Star SR 20 R III iz naše ponudbe. Za več informacij nas kontaktirajte. Vrste uporabe Struženje

Stanje: pripravljen za uporabo (rabljen), Leto izdelave: 2011, Splošni podatki Teža stroja: 2200 kg Višina: 1700 mm Globina: 1200 mm Dimenzije Dolžina stroja: 2200 mm Ta stroj Star SR 20 J Tip C je bil izdelan leta 2011. Ponuja maksimalni premer struženja 20 mm, hitrost vretena do 8.000 vrt/min in moč vretena 2,2 kW. Stroj vključuje šest fiksnih rezilnih postaj in pet radialnih pogonskih orodij. Idealen za natančno švicarsko struženje, zaseda kompaktno površino 2,20 × 1,20 m. Za več informacij o tem stroju nas kontaktirajte. Vrste uporabe Hjdpjx D Dwlofx Agxjl Struženje

Stanje: pripravljen za uporabo (rabljen), Leto izdelave: 2000, moč vretenovega motorja: 3.700 W, največja hitrost vretena: 8.000 obr/min, skupna masa: 2.200 kg, skupna višina: 1.700 mm, število osi: 2, Swiss-type lathe from 2000. This Star SR 20 R was designed for precision turning with a maximum turning diameter of 20 mm and a spindle speed of 8,000 rpm. It features 6 fixed turning tool stations and 4 radial, motorized tool stations, offering great versatility for various applications. Take advantage of the opportunity to purchase this Swiss-type lathe Star SR 20 R. Contact us for further details. • Capacity • Max. turning diameter: 20 mm • Max. travel of sliding tailstock (single clamping): 205 mm • Max. workpiece diameter / bar capacity: 20 mm • Max. workpiece length (front ejection): 80 mm • Spindle • Spindle bore diameter: 20 mm • Feed rates • Rapid traverse (linear axes): 20 m/min Hjdpfx Aeyibndsgxol • Rapid traverse (C-axis): 90,000°/min • Max. cutting feed (linear axes): 10 m/min • Max. cutting feed (C-axis): 10,000°/min • Tooling • Fixed turning tool: M8 × 1.25 • Turning tool on gang slide: M6 × 1 • End mill holder on gang slide: Ø 10 mm • Fixed turning tool stations (std/opt): 6 • Tool shank diameter (std/opt): 12 mm • Radial driven tool stations: 4 • Max. speed of driven units: 8,000 rpm • Max. power of driven units: 1.2 kW • Fixed drilling/tapping tool stations: 4 • Max. collet diameter (ER-collet): 10 mm • Max. drilling capacity (C45 steel): 8 mm • Max. tapping capacity (C45 steel): M8 × 1.25 / M6 × 1 • Power and utilities • Available power: 2.2 kW • Total installed power: 7 kVA • Tank capacity: 155 L • Machine dimensions and weight • Max. footprint: 2.21 × 1.08 m • Axes • Number of axes: 2 (X and C)

Stanje: pripravljen za uporabo (rabljen), Leto izdelave: 2004, moč vretenovega motorja: 3.700 W, največja hitrost vretena: 10.000 obr/min, proizvajalec krmilnikov: FANUC, model krmilnika: Series 18i-TB, število osi: 7, Ta stružnica STAR SR-20 R II je bila izdelana leta 2004. Opremljena je s krmiljenjem Fanuc serije 18i-TB in ima 7 osi. Stroj ima hitrost vretena od 500 do 10000 vrt/min. Prednosti stroja Tehnične prednosti stroja • Dolžina struženja: 205 mm Hsdpsyi Emmsfx Agxel • Največji premer palice: Ø 20 mm • Največji premer pri struženju iz palice: Ø 20 mm • Hitrost protivretena: 8000 vrt/min, moč motorja: 2,2 kW • FMB podajalec palic mod. Turbo 3-26/3200/a

Stanje: pripravljen za uporabo (rabljen), Leto izdelave: 2015, moč vretenovega motorja: 7.500 W, največja hitrost vretena: 7.000 obr/min, skupna masa: 2.200 kg, skupna višina: 1.700 mm, premer obdelovanca (maks.): 32 mm, število osi: 7, This 7-axis Star SR-20J Type C Swiss Type lathe was manufactured in 2015. It offers a maximum machining diameter of 32 mm, a spindle stroke of 310 mm, and spindle speeds up to 7,000 rpm. Equipped with a Hydrajet BF20-2000 high-pressure coolant system and Absolent A.Mist 10S mist extraction unit, the Star SR-20J Type C is a robust addition to any machining facility. Contact us for further details on this Swiss Type Turning Center. Additional Equipment • High-pressure coolant system: Hydrajet BF20-2000 • Mist extraction system: Absolent A.Mist 10S • Fire extinguisher: Status X • Signal tower: Werna Machine Advantages Qualitative Advantages • Comprehensive safety and environmental management systems (fire extinguisher, mist extraction) included. Technical Advantages • Rapid traverse speed of 24 m/min, maximum spindle speed of 7,000 rpm, maximum live tool speed of 6,000 rpm Hsdpfjyi Emtjx Agxjl Additional Information Manuals included Machine still under power Dimensions Machine depth 2,250 mm

Stanje: pripravljen za uporabo (rabljen), Leto izdelave: 2015, obratovalne ure: 16.000 h, Funkcionalnost: popolnoma funkcionalen, stružna dolžina: 80 mm, največja hitrost vretena: 7.000 obr/min, Premer palice (maks.): 32 mm, model krmilnika: Fanuc Serie 32i-B, TEHNIČNI PODATKI Največji premer palice: 32 mm Maksimalna dolžina struženja: 80 mm Hitrost glavnega vretena: 7.000 min⁻¹ C-os (glavno vreteno): 0,001° Največji premer nasprotnega vretena: 32 mm Hitrost nasprotnega vretena: 7.000 min⁻¹ Kapaciteta orodij: 23 orodij PODROBNOSTI O STROJU Krmiljenje: Fanuc serija 32i-B Število osi: 7 Delovne ure: 16.000 h OPREMA Hedoyh Azpspfx Agxel Črpalka za hladilno tekočino z večjo zmogljivostjo Transportni trak za izmetene dele Mayfran transporter za odrezke Servisni komplet za emulzijsko tekočino Podajalnik palic FMB Turbo 3-36/3200 / A Emulzijski hladilni vložek Dodatki za podstavek kratkega stružnika Opomba: Prodajalec lahko ponudi demontažo in nakladanje za 2.000 €.

Stanje: pripravljen za uporabo (rabljen), Leto izdelave: 2019, obratovalne ure: 14.530 h, Krmilna enota Blagovna znamka: FANUC Model: 31i-Model B Glavni pogon Število osi: 3 Ta triosni stroj Star SR-20J N je bil izdelan leta 2019. Gre za švicarski stružni stroj, zasnovan za natančnost in učinkovitost. Idealen za zahtevna obdelovalna opravila, ta model nudi robustno zmogljivost v kompaktni zasnovi. Če iščete visokokakovostne možnosti struženja, razmislite o stroju Star SR-20J N, ki ga imamo na voljo. Za več informacij nas kontaktirajte. Vrste uporabe Struženje Hodpfx Asx D I Axsgxol

Stanje: pripravljen za uporabo (rabljen), Verižna dvigalka, Rema SR Star 090/55, 8 metrov, 3200 kg, Rabljena naprava Proizvajalec: Rema SR Hodpfx Ajxxiivogxsl Model: Star 090/55 Skupne dimenzije: Širina: 650 mm Globina: 350 mm Višina: 460 mm Električni podatki: 400V; 2,2 kW; 4,8A Nosilnost: 3200 kg Višina dviga: 8 m V stanju, kot je prikazano na slikah!

Stanje: rabljeno, TECHNICAL SPECIFICATIONS - Number of axes: 7 - Number of spindles: 2 MAIN SPINDLE - Max. bar diameter: 20 mm - Max. machining length: 205 mm - Spindle speed: 10,000 rpm - Spindle drive power: 3.7 kW - Minimum C-axis resolution: 0.001° SUB SPINDLE - Max. bar diameter: 20 mm - Spindle speed: 8,000 rpm - Spindle drive power: 2.2 kW - Minimum C-axis resolution: 1° - Number of bush holders: 1 BUSH HOLDER 1 - Number of positions: 10 - Number of driven positions: 4 FRONT TOOL POST - Number of positions: 7 SECONDARY OPERATIONS - Number of positions: 4 - Number of driven positions: 4 - Driven tool speed: 8,000 rpm ELECTRICAL SUPPLY Hjdpfx Agexlum Texol - Supply voltage: 400 V - Total power consumption: 7 kW WEIGHT AND DIMENSIONS - Space requirement: 2200 x 1200 mm - Machine height: 1700 mm - Machine weight: 2200 kg MACHINE HOURS - Power-on hours: 34,143 h - Operation hours: 26,657 h - Spindle hours: 15,552 h EQUIPMENT - Control: Fanuc 30i-model A - HFT (High Frequency Turning) - Driven guide bushing - Part extraction - Parts conveyor belt - Parts ejector - Coolant tank - Bar magazine: FMB turbo 3-26 / 3200 A

Stanje: rabljeno, TECHNICAL DATA - Number of axes: 7 - Number of spindles: 2 MAIN SPINDLE - Max. bar diameter: 20 mm - Max. machinable length: 205 mm - Spindle speed: 10,000 rpm - Spindle drive power: 3.7 kW - Minimum C-axis resolution: 0.001° SUB SPINDLE - Max. bar diameter: 20 mm - Spindle speed: 8,000 rpm - Spindle drive power: 2.2 kW - Minimum C-axis resolution: 1° - Number of tool holders: 1 TOOL HOLDER 1 - Number of positions: 10 - Number of driven positions: 4 FRONT TOOL POST - Number of positions: 7 SUB OPERATION - Number of positions: 4 - Number of driven positions: 4 - Driven tool speed: 8,000 rpm ELECTRICAL SUPPLY - Supply voltage: 400 V - Total power: 7 kW WEIGHT AND DIMENSIONS - Footprint: 2200 x 1200 mm - Machine height: 1700 mm - Machine weight: 2200 kg MACHINE HOURS - Power-on hours: 27,854 h - Operating hours: 20,213 h - Spindle hours: 13,158 h Hodpfx Agjxlum Hoxsl EQUIPMENT - Control: Fanuc 30i-model A - HFT (High Frequency Turning) - Driven guide bushing - Parts catcher - Parts conveyor - Parts ejector - Coolant tank - Bar feeder: FMB turbo 3-26 / 3200 A

Stanje: rabljeno, TECHNICAL DATA - Number of axes: 7 - Number of spindles: 2 MAIN SPINDLE - Max. bar diameter: 20 mm - Max. machining length: 205 mm - Spindle speed: 10,000 rpm - Spindle drive power: 3.7 kW - Minimum C-axis resolution: 0.001° SUB SPINDLE - Max. bar diameter: 20 mm - Spindle speed: 8,000 rpm - Spindle drive power: 2.2 kW - Minimum C-axis resolution: 1° - Number of tool holders: 1 TOOL HOLDER 1 - Number of positions: 10 - Number of driven positions: 4 FRONT TOOL POST - Number of positions: 7 BACKWORKING - Number of positions: 4 - Number of driven positions: 4 - Driven tool speed: 8,000 rpm ELECTRICAL SUPPLY - Supply voltage: 400 V - Total power: 7 kW WEIGHT AND DIMENSIONS - Footprint: 2200 x 1200 mm - Machine height: 1700 mm - Machine weight: 2200 kg OPERATING HOURS - Power-on hours: 46,071 h - Operating hours: 33,799 h - Spindle hours: 20,194 h ACCESSORIES - Control: Fanuc 30i-model A - HFT (High Frequency Turning) Hjdexpi Igspfx Agxol - Driven guide bushing - Parts catcher - Parts conveyor - Parts ejector - Coolant tank - Bar feeder: FMB turbo 3-26 / 3200 A

Stanje: rabljeno, TECHNICAL DATA - Number of axes: 7 - Number of spindles: 2 MAIN SPINDLE - Max. bar diameter: 20 mm - Max. machining length: 205 mm - Spindle speed: 10,000 rpm - Spindle drive power: 3.7 kW - Minimum C-axis resolution: 0.001° SUB SPINDLE - Max. bar diameter: 20 mm - Spindle speed: 8,000 rpm - Spindle drive power: 2.2 kW - Minimum C-axis resolution: 1° - Number of tool holders: 1 TOOL HOLDER 1 - Number of positions: 10 - Number of driven positions: 4 FRONT TOOL POST - Number of positions: 7 COUNTER OPERATION - Number of positions: 4 - Number of driven positions: 4 - Driven tool speed: 8,000 rpm ELECTRICAL SUPPLY - Supply voltage: 400 V - Total power consumption: 7 kW Hodpsxlumtsfx Agxsl WEIGHT AND DIMENSIONS - Space requirement: 2200 x 1200 mm - Machine height: 1700 mm - Machine weight: 2200 kg MACHINE HOURS - Power-on hours: 46,042 h - Operating hours: 34,490 h - Spindle hours: 19,447 h EQUIPMENT - Control: Fanuc 300is-model A - HFT (High Frequency Turning) - Driven guide bush - Parts catcher - Parts conveyor - Parts ejector - Coolant tank - Bar magazine: FMB turbo 3-26 / 3200 A

Stanje: rabljeno, TECHNICAL DATA - Number of axes: 8 - Number of spindles: 2 MAIN SPINDLE - Max. bar diameter: 32 mm - Travel distance: 310 mm - Spindle speed: 350–7000 rpm - Spindle drive power: 7.5 kW - Minimum C-axis resolution: 0.001° SUB SPINDLE - Max. bar diameter: 32 mm - Spindle speed: 350–7000 rpm - Spindle drive power: 3.7 kW - Minimum C-axis resolution: 0.001° TOOL HOLDER 1 - Number of positions: 4 - Number of driven positions: 4 - Driven tool speed: 5000 rpm TOOL HOLDER 2 - Number of positions: 6 FRONT TOOL POST Hedpfx Agsy Dimuexol - Number of positions: 4 COUNTER OPERATION - Number of positions: 4 ELECTRICAL SUPPLY - Supply voltage: 380 V - Total connected load: 20 kW WEIGHT AND DIMENSIONS - Footprint: 1700 × 2515 mm - Machine height: 1700 mm - Machine weight: 2900 kg MACHINE HOURS - Total operating hours: 59,144 h - Spindle hours: 42,219 h ACCESSORIES - Control: Fanuc - Driven guide bushing - Part removal unit - Parts conveyor - Parts ejector - Coolant tank *with high-pressure pump: SFB-200 (bars) - Bar feeder: FMB 3-32/3200A

Stanje: novo, Nosilnost 130 kg Min. višina 670 mm Maks. višina 920 mm Min. dolžina 450 mm Hsdev Iztcepfx Agxel Maks. dolžina 1.300 mm Širina valjev 480 mm Teža cca. 36 kg Mobilna škarjasta valjčna proga Holzstar tip SRB 130 za prilagodljivo uporabo pred ali za obdelovalnimi stroji z robustnim, po višini nastavljivim jeklenim okvirjem in pocinkanimi jeklenimi valji. Več valjčnih prog oziroma sekcij je mogoče enostavno povezati z dvema kljukama.

Stanje: generalkompletno obnovljen (rabljeno), Leto izdelave: 2013, Elektrostatični zračni filter Indusa elstar EL4001 NVAS R/O Na voljo so še 3 kosi. Sesalni priklop je spodaj desno, izpust zraka zgoraj levo. Zračni filtri so iz let 2010–2013 in so bili zelo malo uporabljeni, saj je podjetje leta 2014 prešlo na centralni odsesovalni sistem. Vsi filtri so generalno obnovljeni, očiščeni in dezinficirani, z novim notranjim delom. Naprave so vizualno in tehnično v zelo dobrem stanju. Pred dobavo vse naprave 24 ur delujejo na testnem mestu. Hedpfjfyiqbjx Agxol Premišljena konstrukcija, visoka kakovost izdelave in prilagodljiva serija so razlog za uspeh elektrostatične serije filtrov elstar. Elektrostatični zračni filter očisti izpušni zrak strojev tam, kjer nastaja – izpušni zrak postane ponovno primeren za dihanje! Elstar elektrofilter je namenjen ločevanju oljne megle, emulzijske megle, oljnega dima, varilskega dima, hlapov, lebdečih delcev, dima z oksidi in aerosolov. Tako je primeren za skoraj vsako industrijsko področje uporabe.

Stanje: rabljeno, Leto izdelave: 2006, Premer palice: 20 mm Prehod vretena: 22 mm Dolžina struženja: 205 mm Krmiljenje: Siemens Yaskawa Premer palice: 20 mm Število vrtljajev: 500–10.000 obr/min C-os: 0,001° Prevzemna postaja: 20 mm Dolžina struženja: 30 mm Indeksiranje pri 0,001° Število orodij: 10 fiksnih Skupna priključna moč: 2,2/3,7 kW Teža stroja: ca. 3,5 t Hedpfjy E Twmex Agxjl Potrebni prostor: ca. 2,6 x 1,2 x 1,8 + FMB m CNC dolgostružni stroj Star Ecas 20, letnik 2006, z nalagalnim magazinom FMB minmag 18, v zelo dobrem stanju, iz medicinske tehnike.

Stanje: dober (rabljeno), Introma ZD-2 SR Žična spenjalka Stroj je v zelo dobrem stanju in pripravljen za uporabo. To je trenutni proizvodni model. Tehnične specifikacije: Kapaciteta: 180/min Debelina šivanja: maks. 25 mm Premer žice: maks. 1 mm Napajanje: 230V Teža: 230 kg Stroj ima nastavljivo mizo za spenjanje blokov in brošur. Stranski in sprednji robovi. Navodila so priložena. Hodpfey Hgixox Agxel

Stanje: novo, Leto izdelave: 2024, Funkcionalnost: popolnoma funkcionalen, Na zalogi je horizontalna CNC mozničarka STARTECH CN Plus. Hedpfx Ageip Dh Ijxsl

Stanje: zelo dobro (rabljeno), Funkcionalnost: popolnoma funkcionalen, Leto izdelave: 2019, Prostornina: cca 1,0 m³ Širina reza: 1.500 mm Hodpfxenubaws Agxol 4 osi – razmak med osmi 25 mm Kombiniran priklop za bagre (12–18 t) in nakladalce na kolesih (od 9 t naprej)

Stanje: rabljeno, Naprodaj: Komplet 5 maserjev, vključno z glavnim maserjem in upravljalnikom za 5 maserjev (skupaj 6 kosov), cena 9.000 evrov. Na voljo imamo tudi samo soda, približno 15 kosov, cena za kos: 600 evrov. Na voljo so tudi sodi s podestom – niso samostojni, niso popolni – 10 kosov, 900 evrov na kos. Na voljo imamo 1 samostojen maser z upravljalnikom za 900 evrov. Hodpfx Ajy Hi N Usgxel Maserji Inject Star. Na voljo imamo tudi vakuumski maser Pek-Mont za 5.270 evrov.

Stanje: rabljeno, CNC-langdreh automat Star SE-12 Hodpfx Agswp T I Tjxel

Stanje: rabljeno, TECHNICAL DATA - Number of axes: 5 - Number of spindles: 2 MAIN SPINDLE - Max. bar diameter: 16 mm - Spindle speed: 12,000 rpm Hsdeu Elk Depfx Agxol - Minimum C-axis resolution: 1° SUB SPINDLE - Max. bar diameter: 16 mm - Spindle speed: 8,000 rpm BUSHING HOLDER 1 - Number of positions: 9 - Number of driven positions: 3 - Driven tool speed: 8,000 rpm FRONT TOOL POST - Number of positions: 3 BACKWORKING - Number of positions: 3 ELECTRICAL SUPPLY - Supply voltage: 400 V MACHINE HOURS - Operating hours: 57,297 h - Spindle hours: 39,537 h EQUIPMENT - Control: Fanuc 18iT - Driven guide bushing - Parts catcher - Parts conveyor belt - Parts ejector - Coolant tank - Bar feeder: IEMCA SMART 316/32L - Fire suppression system * NB: Functionality not guaranteed. Must be checked by a qualified company engaged by the buyer. - Electrical transformer - Number of driven toolholders: 3

Stanje: rabljeno, TECHNICAL DATA - Number of axes: 5 - Number of spindles: 2 MAIN SPINDLE - Max. bar diameter: 16 mm - Spindle speed: 12,000 rpm - Minimum C-axis resolution: 1° SUB SPINDLE - Max. bar diameter: 16 mm - Spindle speed: 8,000 rpm TOOL HOLDER 1 - Number of stations: 9 - Number of driven stations: 3 Hjdju Elkqepfx Agxjl - Driven tool speed: 8,000 rpm FRONT UNIT - Number of stations: 3 BACKWORKING - Number of stations: 3 ELECTRICAL SUPPLY - Supply voltage: 400 V MACHINE HOURS - Operating hours: 73,252 h - Spindle hours: 50,900 h ACCESSORIES - Control: Fanuc 18iT - Driven guide bush - Parts catcher - Parts conveyor belt - Parts ejector - Coolant tank - Bar feeder: IEMCA CH 220/32L - Fire extinguishing system * NB: Functionality not guaranteed. Should be checked by a qualified company appointed by the buyer. - Electrical transformer - Number of driven tool holders: 3