Studer S145 nakup rabljenega (108)

Stanje: nepreverjeno (rabljeno), Leto izdelave: 1996, višina središča: 175 mm, dolžina brušenja: 1.000 mm, fanuc 16 Djdpfxey Tv Uwe Abtjuu notranje vreteno pladenj za hlajenje

Stanje: generalkompletno obnovljen (rabljeno), številka stroja/vozila: 1015.54, Popolnoma obnovljen cilindrični brusilni stroj. Medkončna razdalja 400 mm, višina konic 100 mm. Tehnični podatki in dodatna oprema v skladu z ločenim PDF-om. Dodpfxjy Hhk De Abtouu

Stanje: zelo dobro (rabljeno), obratovalne ure: 4.589 h, Funkcionalnost: popolnoma funkcionalen, središčna višina pri ročični gredi: 100 mm, višina središča: 100 mm, dolžina brušenja: 400 mm, studer S20-2 obratovalne ure 4589 višina med centra 100 mm maks. dolžina brušenja 400 mm notranje in zunanje brušenje dodatno vreteno namestitev filtra za hladilno vodo zelo veliko dodatne opreme omar dokumentacija stroj je pod napetostjo za pregled Duedey R D Rnopfx Abteu

Stanje: rabljeno, Leto izdelave: 2002, Studer S60 CNC – Very well-maintained machine Operated exclusively with oil Year of manufacture: 2002 Centre height: 225 mm Control system: Fanuc 16T Duedpjh Aykijfx Abtsu

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. Djdpfx Abjtz T H Djtouu

Stanje: rabljeno, TECHNICAL DATA - Centre height: 100 [mm] - Distance between centres: 650 [mm] - Max. table swivelling: [degrees] - Travel: 650 [mm] - Feed rate: 100 - 3500 [mm/min] GRINDING WHEEL HEADSTOCK - Swivel range: [degrees] - T1 grinding wheel dimensions: 350 x 32 x 127 [mm] - Power: 3 [kW] - Speed: 1600 - 2200 [rpm] Duedpfsyn R I Hjx Abtsu - Peripheral speed: [m/s] WORKPIECE HEADSTOCK - Spindle speed: - 1200 [rpm] - Power: 0.5 [kW] - Taper type: MT4 (Morse Taper 4) - Max. workpiece weight: 20 [kg] - Swivel range: 0 - 90 [degrees] ELECTRICAL SUPPLY - Supply voltage: 400 [V] - Power: 8 [kVA] WEIGHT AND DIMENSIONS - Footprint: 00 x 00 [mm] - Machine height: 1650 [mm] - Machine weight: 1900 [kg] OPERATING HOURS - Hours under power: 01 [h] ACCESSORIES - Sony LG20-2 display unit - Automatic contact detection: SENSITRON 6 - 1 tailstock with fine adjustment - 1 internal grinding spindle - Fixed dressing device - Coolant tank - 1 steady rest with three supports

Stanje: rabljeno, Leto izdelave: 1998, Višina konic 125 mm Razdalja med konicama 400 mm Krmiljenje FANUC 21i Premer diska maks. 406 mm Dujdexwdwfjpfx Abteu Dimenzije diska 406 x 127 x 40 mm Teža obdelovanca 30 kg Hod vzdolžnega sani 483 mm Hod prečnega sani 254 mm Skupna priključna moč maks. 20 kVA Teža stroja pribl. 4,0 t Potreben prostor pribl. 3,0 x 2,0 x 2,1 m vključno z 2 notranjima brusilnima vretenoma vključno z B-osjo 1° Hirt, krmiljena vključno s C-osjo vključno s Quick-Set merilno sondo vključno s Sensitronom vključno z hidravličnim nagibnim dreserjem vključno z magnetskim vpenjalom vključno z ostalo drobno opremo vključno z dokumentacijo brez hladilnega sistema, saj je bil prej priključen na centralno enoto Delovne ure pribl. 71.000 h Ure vretena pribl. 25.900 h

Stanje: rabljeno, Leto izdelave: 1987, Premer brušenja 200 mm Dolžina brušenja 400 mm Višina konic 100 mm Geometrijsko obnovljena in na novo prebarvana Z notranjo brusilno enoto Dujdpfx Asvw Duuebteu Dodatna oprema na zahtevo Stroj je možno pri stranki pod napetostjo ogledati do vključno januarja 2026.

Stanje: rabljeno, Leto izdelave: 2002, Grinding diameter: 250 mm Grinding length: 400 mm Centre height: 125 mm Control: Fanuc 21i-T Dedpfxjvx Dvuj Abtsuu Machine serviced and partially overhauled. - New grinding spindle bearings - New X-axis spindle - Upper table surface reground - New table geometry - New geometry: workpiece support (WSS) to grinding spindles B-axis with 1° Hirth serration Longitudinal positioning HF internal grinding spindle Gap control (GAP) Paper band filter

Stanje: rabljeno, Leto izdelave: 2004, Premer brušenja 250 mm Dolžina brušenja 650 mm Duodpjywntysfx Abtsu Višina konic 125 mm Stroj se prodaja s servisom in novo geometrijo Delovnih ur do sedaj 12.260 Konjiček z fino nastavitvijo Brušilni vretenjak z možnostjo nagiba, 5° Hirt zobniški prenos Filter s papirnatim trakom Merilna naprava Marposs Naprava za notranje brušenje

Stanje: dober (rabljeno), Leto izdelave: 1970, Grinding diameter Ø 250 mm Grinding length 750 mm Grinding wheel size 400 x 50 mm Spindle power 3 kW DIMENSIONS Duedpjhbafwofx Abteu Length 2400 mm Width 1300 mm Height 1500 mm

Stanje: dober (rabljeno), dolžina brušenja: 500 mm, For sale is a cylindrical grinding machine by Studer, model RHU 500. The machine is in good condition and fully operational; the guideways show minimal signs of wear. Technical data: Grinding wheel diameter: Ø 250 mm Grinding length: 500 mm Grinding wheel dimension: 400 x 50 mm Upon request and for an additional fee, we can arrange disassembly, loading, and transport throughout Europe. Prices are exclusive of VAT. Glnld8 Dodoqzh Elspfx Abtsuu Inspection is possible by appointment. Please contact us—our team looks forward to assisting you. Trade-in or exchange possible! Machinery purchase / sales PURCHASE / SALE OF PRODUCTION & METALWORKING MACHINES, ETC. Are you looking for a high-quality yet affordable metalworking machine for your production? Or are you interested in selling yours? For further information or to contact us, please visit our website.

Stanje: rabljeno, TECHNICAL DATA - Distance between centers: 650 [mm] - Center height: 175 [mm] - Max. workpiece weight between centers: 80 [kg] - Travel X/Z: 285 / 800 [mm] - X-axis programmable feed rate: [mm/min] - Resolution: 0.0001 [mm] - Z-axis programmable feed rate: [mm/min] - Resolution: 0.0001 [mm] - Table swiveling range: 0 - 8.5 [degrees] GRINDING WHEEL HEADSTOCK - T1 grinding wheel dimensions: 500 x 63 x 203.2 [mm] - Speed: 50 [m/s] - Power: 9 [kW] - Manual swivel range: -15 / +195 [degrees] - Minimum indexing increment: 2.5 [degrees] - Internal grinding speed: 40,000 [rpm] - Power: 3 [kW] WORKPIECE SPINDLESTOCK - Taper type: MT5 Duodpfeylc R Usx Abtju - Speed: 1 - 1500 [rpm] - Power: 1.8 [kW] - Bore: 30 [mm] - Minimum C-axis resolution: +/- 0.5 [degrees] TAILSTOCK - Taper type: MT4 - Quill diameter: 50 [mm] - Quill travel: 35 [mm] ELECTRICAL SUPPLY - Supply voltage: 400 [V] - Total drive power: 20 [kVA] WEIGHT AND DIMENSIONS - Required floor space: 2,670 x 2,050 [mm] - Machine height: 1,900 [mm] - Machine weight: 4,000 [kg] MACHINE HOURS - Power-on hours: 190 [h] ACCESSORIES - Control: FANUC Oi-TD - Electronic handwheel - 3-color status indicator light - Oil mist extraction unit - Direct measuring systems for axes: X / Z - Dynamic balancing of grinding wheels: MPM - Automatic contact detection: SENSITRON 6 - Stationary dressing device - Workpiece touch probe - Coolant tank: 375 [l] * with paper filter

Stanje: rabljeno, Premer brušenja 250 mm Dolžina brušenja 500 mm Dimenzije brusnega koluta 400 x 50 mm Dedsxzuylopfx Abtouu Po naši oceni je stroj v dobrem rabljenem stanju in si ga je po dogovoru mogoče ogledati pod napetostjo. Tehnične značilnosti in dodatna oprema: - konjiček - razna dodatna oprema Dodatna oprema, prikazana orodja in vpenjalna sredstva so vključena v obseg dobave samo, če je to navedeno v dodatnih informacijah. Pridržujemo si pravico do sprememb in napak v tehničnih podatkih ter predhodne prodaje!

Stanje: skoraj kot novo (rabljeno), Leto izdelave: 1995, Funkcionalnost: popolnoma funkcionalen, višina središča: 225 mm, teža obdelovanca (maks.): 100 kg, dolžina brušenja: 1.600 mm, CNC-Okroglosmerna brusilni stroj STUDER S40, letnik 1995. Stroj je v dobrem rabljenem stanju. Dsdpet N Ivcefx Abtouu Tehnični podatki: • Krmiljenje: Fanuc Series 16-GC • Prostorske mere (višina/dolžina/širina): pribl. 250 cm / 650 cm / 320 cm Osi: • Končna razdalja: 1.600 mm • Višina konice: 225 mm • 4 osi (X, Z, B, C) • Največja teža obdelovanca cca: 100 kg Oprema: • 2 brusna koluta + 1 notranji brusni kamen (izbira preko krmiljenja) • Čelno, odrezovalno, notranje in okroglo brušenje • Magnetna vpenjalna glava, trikraka vpenjalna glava, natezne puše, brušenje med konicami • Samodejna priprava za dresiranje • Podporni prstan • Ločljivost: 0,0001 mm • Poligonsko brušenje • Statična uravnoteževalna enota • Brusni koluti iz korunda, diamantni in CBN na voljo • Krmiljenje ciklov • Vnos podatkov preko DXF možen

Stanje: dober (rabljeno), Leto izdelave: 2000, Cylindrical Grinding Machine Studer Universal S30 leanPRO Studer S30, Year of manufacture: 2000 Machine hour counter Regular maintenance intervals by manufacturer (last maintenance 11/25, report available) Grinding wheel replacement: at manufacturer’s specified intervals Hydraulic inspection: annual test Buffer battery replacement: included in Studer maintenance Control system: FANUC 16 T Grinding diameter: 350 mm Grinding length: 1000 mm Center height: 125 mm Distance between centers: 650 mm Optional grinding cycles for elevated centers Table swiveling: 11° Glass scale on X- and Z-axis Paper belt filter unit Workpiece headstock: approx. 1-1,000 rpm Internal grinding device with accessories LED spotlight with flexible arm Grinding wheel: 400 x 80 mm Frequency converter for external grinding spindle Grinding wheel flange Bore diameter: 127 mm Frequency converter for internal grinding spindle Workpiece weight: approx. 80 kg Live center and MT4 included Dedpsyx Hgzefx Abtouu Workpiece headstock: MT5 taper Tailstock: MT3 taper Quill stroke: 40 mm Machine weight: approx. 3,400 kg Installation dimensions (LxW): 2,300 x 1,550 mm Machine height: approx. 2,000 mm Electrical supply Digital measuring system Coolant supply with filter fleece, tank capacity 300 L Machine hour counter control on: 35,978 h

Stanje: rabljeno, Višina osi: 125 mm Razdalja med konicama: 400 mm Maks. vzdolžni pomik: 440 mm Brusilni kolut: 400x50x127 mm Maks. premer brušenja: 250 mm Največja obremenitev mize: 80 kg Največja teža obdelovanca med konicami: 80 kg Hitrosti brusnega koluta: število (stopnje) 3, 1500-1800 min⁻¹ Kotna nastavitev: +/- 45° Glava vretena obdelovanca: -brezstopenjske hitrosti: 30-675 min⁻¹ -rotacija 90° Stožčasti vpenjalni nastavek vretena: 5 MT Stožec v konjičku: 3 MT Brezstopenjska hitrost mize: 0,05-5,50 m/min Djdeylcpkjpfx Abtouu Motor zunanjega brusnega koluta: 3 kW Teža stroja cca 1500 kg

Stanje: skoraj kot novo (rabljeno), Leto izdelave: 2023, obratovalne ure: 200 h, Funkcionalnost: popolnoma funkcionalen, višina središča: 175 mm, širina na sredini: 650 mm, Stroj je bil prevzet pri podjetju Studer in nikoli ni bil zagnan. Dusdpfsyttcqox Abtsu

Stanje: zelo dobro (rabljeno), Krmilnik FANUC 21i-T Djdpfeyabt Dex Abtouu 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 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: generalkompletno obnovljen (rabljeno), Leto izdelave: 2006, Funkcionalnost: popolnoma funkcionalen, številka stroja/vozila: 119/020.0895, Izvor proizvodnje CH Napetost 400V Dimenzije 2700x2350x2100 mm Djdpjlbgfcefx Abtsuu Neto teža 4500 kg TEHNIČNI PODATKI Krmiljenje Fanuc 16i-T Višina konice 175 mm Razdalja med konicami 1000 mm LINEARNE OSI Dolžina brušenja 500 mm Pomiki X: 267 mm Z: 650 mm BRUSILNI VRETENJAK Brezstopenjsko vrtljiv +/- 8,5° Dimenzije brusnega kamna 500x80x203 mm Moč 7,5 kW Hitrost 44 m/sek. VRETENJAK ZA OBDELOVANEC Vrsta konusa MK5 C-os +/- 5° Moč 1 kW Hitrost vrtenja 30-1000 min-1 PROTIDEL Vrsta konusa MK3 Hod pinole 35 mm Premer pinole Ø 50 mm Maks. masa obdelovanca 130 kg NAPAJANJE Napetost 400V 50 Hz Tehnični podatki so informativni in podvrženi spremembam ali napakam.

Leto izdelave: 2002, stanje: rabljeno, Grinding diameter 10–300 mm Grinding length 650 mm Centre height 175 mm Total power requirement 12 kW Machine weight approx. 3.7 t O F F E R We can offer you, ex-stock, subject to prior sale and errors, Without obligation: STUDER (CH) CNC Precision Cylindrical Grinding Machine Model: eco 650 CNC Year of manufacture: 2002 Serial No: 026 Grinding-Ø (approx. min./max.): 10 – 300 mm Centre height: 175 mm Distance between centres / Max. workpiece length: 650 mm Table travel: 800 mm Workpiece weight between centres: approx. 80 kg Slide travels: Longitudinal axis Z (resolution 0.0001 mm) max.: 800 mm Cross axis X (resolution 0.0001 mm): 285 mm Feeds / rapid traverse in Z / X axis: 0.001 – 10,000 / 5,000 mm/min Grinding slide swivelling (fixed angle): 0 & 30° Dsdsva I N Uepfx Abtsuu Table swivelling max.: approx. 10° Grinding wheel size (Ø x width x bore): 500 x 80 x 127 mm Grinding wheel speed: 1,760 rpm Workhead - stepless spindle speed: approx. 0 – 1,000 rpm Workpiece spindle mounting: MK 5 Spindle drives: 7.5 kW Total drive: 12 kW - 400 V - 50 Hz Weight: approx. 3,700 kg Accessories / Special features: • FANUC 3-axis CNC control, type 21i-T, with all necessary grinding, measuring and dressing cycles, e.g.: shoulder grinding, plunge grinding, longitudinal grinding, multi-diameter grinding, taper grinding, automatic dressing, etc., including manual control unit with electronic handwheel • C-axis in the workhead for spindle positioning (and non-circular grinding) • Grinding spindle head with grinding wheel on the right, swivellable by 30° • Fixed workhead with MK5 / W 30 mount • Hydraulic tailstock with cylindricity correction, dresser mounted separately on table • Pneumatic support for easier adjustment of tailstock and workhead on table guideway • Various accessories, including various flanges and operating manuals • Partial enclosure with monitored sliding door • Machine bed made of GRANITAN mineral cast Condition: good to very good – ready for demonstration! Video available on request. Delivery: ex stock, as inspected Payment: strictly net, upon receipt of invoice We have a wide range of grinding machines of all types available. Please feel free to enquire!

Stanje: rabljeno, TECHNICAL DATA - Center height: 100 [mm] - Distance between centers: 650 [mm] - Max. table rotation: [degrees] - Travel path: 650 [mm] - Feed rate: 100 - 3500 [mm/min] GRINDING WHEEL-HEAD SPINDLE BASE - Swivel angle: [degrees] - T1 Grinding wheel dimensions: 350 x 32 x 127 [mm] - Power: 3 [kW] - Speed: 1600 - 2200 [rpm] - Peripheral speed: [m/s] WORKPIECE HOLDER HEADSTOCK - Spindle speed: - 1200 [rpm] - Power: 0.5 [kW] - Taper type: MT4 - Max. workpiece weight: 20 [kg] - Swivel range: 0 - 90 [degrees] ELECTRICAL SUPPLY - Supply voltage: 400 [V] - Power: 8 [kVA] WEIGHT AND DIMENSIONS - Required space: 00 x 00 [mm] - Machine height: 1650 [mm] - Machine weight: 1900 [kg] MACHINE HOURS - Total power-on hours: 01 [h] ACCESSORIES - Sony LG20-2 digital readout - Automatic contact detection: SENSITRON 6 - 1 tailstock with fine adjustment - 2 internal grinding spindles: 20,000 / 60,000 [rpm] - Fixed dressing device - Coolant tank Dedexrg Hxepfx Abtouu - 1 steady rest with three jaws - 3-jaw chuck Ø 100 mm - Various grinding wheels

Stanje: generalkompletno obnovljen (rabljeno), Leto izdelave: 2025, obratovalne ure: 36 h, Funkcionalnost: popolnoma funkcionalen, številka stroja/vozila: 1024-54, Country of manufacture: Switzerland Voltage: 380/50/3 Net weight: approx. 1600 kg Customs tariff number: 8460.2920 Dimensions: 235x155x145 cm TECHNICAL SPECIFICATIONS: MAIN DIMENSIONS: Center height: 100 mm Distance between centers: 400 mm LONGITUDINAL SLIDE: Maximum travel: 420 mm Minimum automatic travel: 1 mm Table feed rate: 100–3500 mm/min Reversal dwell time: 0–5 sec Table tilt angle (400/650 mm): 30°/15° CROSS SLIDE: Maximum travel: 170 mm Rapid traverse: 30 mm Plunge depth per diameter: 1.9 mm Feed 1: 0.03–1.5 mm/min Feed 2: 0.02–0.3 mm/min Plunge feed per pulse: 0.0005–0.025 mm WHEELHEAD: Grinding wheel (diameter x width x bore): 350 x 32 x 127 mm Drive power: 3 kW Peripheral speed: 30 m/s Spindle speeds: 1600/1975/2200 rpm Manual travel: 120 mm Swivel range to the right: 15° + 30° Optional wheelhead guard for max. wheel set width: 50 mm WORKHEAD: Swivel range: 0°–90° Spindle speeds (nw): 80/175/380/800 rpm Internal taper: Morse 4 Collets: W-20 Drive power: 0.5 kW Max. workpiece weight: 20 kg Max. load during unsupported grinding: 12 Nm Optional continuously variable drive, adjustment range I: 30–300 rpm Optional continuously variable drive, adjustment range II: 120–1200 rpm TAILSTOCK: Internal taper: Morse 2 Dusdpfx Absw T Sc Netsu Quill travel: 20 mm GUARANTEED WORKING ACCURACY: Straightness of generator: Between centers 400 mm Measured over 400 mm: 0.002 mm Between centers 650 mm Measured over 650 mm: 0.003 mm Roundness deviation for unsupported grinding: 0.0004 mm CONNECTION VALUES: Power consumption: max. 8 kVA Admissible voltage variation: –15% to +10% Admissible frequency variation: +/- 3% Compressed air: 5 bar Unless otherwise stated, technical data is provided without obligation or warranty.

Stanje: generalkompletno obnovljen (rabljeno), Leto izdelave: 2025, obratovalne ure: 50 h, številka stroja/vozila: 3018-04, Country of manufacture: Switzerland Voltage: 380/50/3 Net weight: 3,100 kg Overall dimensions: 230 x 155 x 170 cm Installed power: 13 kVA Dodpfxow T Sd Tj Abtsuu Customs code: 8460.2920 TECHNICAL SPECIFICATIONS MAIN DIMENSIONS Centre distance: 650 mm Grinding capacity (SpW+bs): 80 Travel: 700 mm LONGITUDINAL SLIDE Max. stroke: SpW+50 mm Minimum automatic feed: 1.5 mm Feed rate: 50–5,500 mm/min Reversal delay: 0–6 sec Max. table swiveling angles: 12°/10°/8.5°/6° Pneumatic relief for table and workhead CROSS SLIDE Max. stroke: 300 mm Rapid traverse: 60 mm Plunge depth in diameter: 3.4 mm Feed rate 1: 0.012–6 mm/min Feed rate 2: 0.012–1.2 mm/min Feed per pulse: 0.001–0.05 mm GRINDING WHEELHEAD Left-hand wheel, external grinding: 400 x 80 x 127 mm Drive power: 5.5 kW Peripheral speed: 35 m/s Spindle speed: 1,670 / 2,110 rpm Internal grinding attachment for belt-driven spindles, incl. drive unit: 1.5 kW WORKHEAD Swivel range: 0–90° Infinitely variable spindle speed: 30–1,000 rpm Internal taper: Morse 5 Clamping collets: W-25 Drive power: 0.55 kW Max. workpiece weight between centers: 130 kg Air grinding load capacity: 100 Nm TAILSTOCK Internal taper: Morse 3 Quill stroke: 35 mm Precision adjustment for cylindricity correction: ±40 μm TECHNICAL CHARACTERISTICS: GUARANTEED WORKING ACCURACY Straightness of generator over 630 mm: 0.003 mm Roundness for air grinding: 0.0003 mm CONNECTION VALUES Max. absorbed power: 13 kVA Max. permissible voltage fluctuation: -15% / +10% Max. permissible frequency fluctuation: ±3% Required compressed air pressure: 5 bar Technical specifications provided without obligation and subject to change. Errors and omissions excepted.

Stanje: generalkompletno obnovljen (rabljeno), Leto izdelave: 2007, Funkcionalnost: popolnoma funkcionalen, številka stroja/vozila: 027.0400/067, CNC CYLINDRICAL GRINDER STUDER S-33 CNC Year: 2007 - Fanuc 21i-TB 1 external grinding spindle Country of manufacture: Switzerland Voltage: 380/50/3 Net machine weight: 4000 kg TECHNICAL SPECIFICATIONS Distance between centers: 600 mm Center height: 175 mm Max. workpiece weight: 80 kg Longitudinal slide Z Max. travel: 800 – 1150 mm Speed: 0.001 to 10,000 mm/min (early 2000 model: 0.001–5,000 mm/min) Resolution: 0.0001 mm Cross slide X Max. travel: 285 mm Speed: 0.001 to 20,000 mm/min (early 2000 model: 0.001–10,000 mm/min) Resolution: 0.0001 mm Wheelhead (universal version) Swivel range: -15 to 225° Duedpfxew T Sh Es Abtsu (early 2000 model: -15 to 195°) Swivel axis: 2.5 / 1 ° Hirth Drive power: 7.5 or 9 kW or 11 kW Grinding wheel: 500x63 (80/110F5) x203 mm Workhead Speed: 1 – 1500 rpm Taper: MT4 or MT5 / ISO 50 Drive power: 1.6 or 3.0 or 4.0 kW Tailstock Taper: MT3 or MT4 Quill stroke: 35 / 50 mm (early 2000 model: 35 mm) Quill diameter: Ø 50 mm Fine adjustment: +/- 40 µ Control: Fanuc 21i-TB Specifications provided are subject to verification and do not constitute a binding offer.