Beli Compair 715 Ace bekas (3.195)

Kondisi: bekas, Tahun pembuatan: 2025, jam operasional: 57 h, 24111638 Gbodpfx Aox Npwwelkol

Kondisi: siap digunakan (bekas), Tahun pembuatan: 2000, kecepatan spindel (maks.): 4.000 rpm, jarak pergerakan sumbu X: 410 mm, jarak gerak sumbu Z: 280 mm, daya motor spindle: 30.000 W, berat keseluruhan: 6.800 kg, jumlah sumbu: 2, Horizontal lathe from the year 2000. This Monforts RNC 400 AC features a turning length of 600 mm and a swing over bed of 410 mm. It is equipped with a 12-position disc turret and a maximum spindle speed of 4,000 rpm. If you are looking for a high-quality lathe, consider the Monforts RNC 400 AC that we have for sale. Contact us for further details. • CNC memory: 256 kB (buffered RAM), expandable to 1.5 MB • Programming language: DIN 66 025 with high-level language extensions • Swing over bed: 410 mm • Max turning diameter over cross slide: 280 mm • Turning length: 600 mm • Spindle bearing diameter: 130 mm • Spindle nose: DIN 55026 A6 • Bar capacity: 65 mm • Max. torque: 500 Nm • Axes/feeds: AC servo drives with electronic safety monitoring; rapid traverse X/Z 24/24 m/min; feed force X/Z 7.2/10.7 kN • Turret: 12-station disc turret (DIN 69880/VDI 3425/2), shaft diameter 40 mm • Driven tools: 12 stations; maximum power 13.6 kW (25% duty cycle); maximum torque 28.9 Nm; maximum speed 4,500 rpm • C-axis: 0-25 rpm; 300 Nm holding torque • Tailstock: Separate guideway; manual clamping; 900 mm travel; 90 mm quill stroke; 12,000 N force (adjustable); MT3 • Hydraulic system: Centralized pressure oil supply for hydrostatics and clamping • Coolant system: 310 L tank; reinforced coolant pump (3 bar, 40 L/min) • Bed: 60° slant bed; welded steel construction on a reinforced concrete base with 3-point support • Power requirements: 3x400 V, 50 Hz; total connected load 20.5 kW (41 kVA) Additional Equipment • Hydraulic hollow chuck • Parts catcher • A6 draw tube for collet chuck • 200 mm suction nozzle • 1 GB memory expansion • Network card • Driven tools with rigid tapping (without compensating chuck) Technical Specification Gbodsy Ifptjpfx Alkjl Counter Spindle: No Driven Tools: Yes

Kondisi: hampir baru (bekas), Tahun pembuatan: 2017, jam operasional: 2.600 h, kapasitas angkut: 600 kg, tinggi angkat: 3.500 mm, jenis bahan bakar: listrik, tipe tiang: triplex, tinggi konstruksi: 1.690 mm, LINDE L 06 ac (1170) | Mast: 3F3500 ID: 25082.0138 Godoy Itihspfx Alkobl Category: Used Mast: 3-Stage, 3500 mm Collapsed height: 1690 mm Lift height: 3500 mm Load capacity: 600 kg Year: 2017 Operating hours: 2,600 Battery voltage: 24 V Options: - Compact walkie stacker! - Equipped with: Triplex mast – Full Free Lift (FFL) - Freestanding, adjustable forklift forks - Suitable for all types of pallets - Power steering

Kondisi: hampir baru (bekas), Tahun pembuatan: 2018, jam operasional: 714 h, kapasitas angkut: 1.200 kg, tinggi angkat: 2.950 mm, jenis bahan bakar: listrik, tipe tiang: dupleks, tinggi konstruksi: 1.940 mm, LINDE L 12 ac (1170) Gjdoy Itibopfx Alksbl Mast: 2W2950 ID: 25081.2188 Category: Demo Mast: 2W2950 Lowered height: 1940 mm Lifting height: 2950 mm Capacity: 1200 kg Year: 2018 Operating hours: 714 hours Battery: 24 V / 440 Ah - GEL Options: VERY unique CONTRA stacker!!! Equipped with: - MAST with tilt function - Freely suspended, adjustable forklift forks - SUITABLE for all types of pallets - POWER STEERING!!!

Kondisi: sangat baik (bekas), Tahun pembuatan: 2003, Fungsionalitas: berfungsi sepenuhnya, KASTOtec AC 4 Cutting Capacity (Round): 430 mm Cutting Capacity (Square, H x W): 430 x 430 mm Cutting Capacity (Flat, H x W): 430 x 430 mm Clamping Range: 0 – 430 mm Smallest Workpiece Dimension: 10 x 10 mm Minimum Cutting Length: 6 mm Shortest Remnant Length in Automatic Operation (only possible with geometrically perfect surfaces): 35 mm Shortest Remnant Length in Single Cut: 10 mm Godpfx Asy Dckmelkjbl Dimensions and Weights: Length approx.: 2,140 mm Width incl. chip conveyor: 4,610 mm Height (saw frame lowered) approx.: 2,195 mm Height (saw frame at highest position) approx.: 2,410 mm Material Support Height: 700 mm Total Weight: 4,300 kg Year of Manufacture: 2003 Performance Data: Total Connected Load: 25 kW Saw Motor Power: 15 kW Drive Power at Drive Wheel: 14 kW Cutting Speed, infinitely variable (50/60 Hz): 12 - 120 m/min Automatic Material Feed Length, single stroke: 600 mm Saw Blade Dimension: 6,830 x 41 x 1.3 mm Coolant Tank Volume: 150 liters KASTOtec AC 4 Fully hydraulic heavy-duty automatic bandsaw, robust construction For cutting round, square, and flat material as well as tubes and profiles of all grades; especially suited for tool steel and difficult-to-machine materials such as titanium, Hastelloy, Inconel, etc. Machine Base Torsion-resistant welded construction Saw Unit Steel-mineral cast composite construction Saw Unit Guidance High-performance sawing technology requires the use of backlash-free and low-maintenance guide systems. Saw unit guided on two vertical square guide columns, one linear guide unit with play-free carriages and two preloaded, adjustable rollers on a guide rail, ensures high rigidity and cutting accuracy. Higher metal removal rates, shorter cutting times, higher band life, and reliability are hallmarks of the new KASTOtec. Saw Blade Guidance Lateral guidance via hydraulically preloaded carbide slide guides with quick-lift device for fast blade change. Back guidance with oscillating-mounted carbide guides. Automatic adjustment of the movable blade guide to the material width being processed. Material Quick-Lift Device After the sawing operation in automatic cycle, the workpiece is retracted approx. 2 mm from the feed side by a material quick-lift device while still clamped (extends blade life). Options available on the machine: - Carbide package - Coolant monitoring - Band tracking - Speed monitoring - Machine lamp - Machine roller conveyor - CNC control - Special chip conveyor - Carbide package Discharge roller conveyor for the KASTOtec AC 4 in stock with the following dimensions: 1,200 mm length, 500 mm support width, 6 transport rollers

Kondisi: baru, Tahun pembuatan: 2024, jam operasional: 10 h, Fungsionalitas: berfungsi sepenuhnya, Dijual mesin las EWM Tetrix XQ 400 Puls AC/DC W Expert lengkap dengan aksesori (wire feeder tig Speed continuous drive 45 coldwire/torch ABITIG 500W MT 4m/lainnya). Perangkat ini dibeli sebagai tambahan untuk otomatis linear BOKI dengan tujuan pengelasan memanjang pipa/lembaran aluminium. Proses pengelasan berhasil, namun proyek akhirnya tidak dilaksanakan. Perangkat beroperasi sekitar 20 jam = kondisi seperti baru. Harga beli: 354.800 CZK. Gsdpsy Hpamefx Alksbl

Kondisi: hampir baru (bekas), Fungsionalitas: berfungsi sepenuhnya, Kode Ferwood: RS0003617 - Kode Produsen: HVR02,2-W025N - Kondisi: Seperti baru (barang pameran) - Fungsionalitas: Berfungsi penuh - Mesin yang kompatibel: - Berat: 22 kg - Dimensi: 70 x 46 x 34 cm - Jika berminat, kami menawarkan layanan revisi. Silakan hubungi kami. Gjdpfxjyztu Ro Alkobl

Kondisi: bekas, Tahun pembuatan: 2010, jam operasional: 4.687 h, kapasitas angkut: 1.500 kg, tinggi angkat: 3.150 mm, pengangkatan bebas: 1.550 mm, jenis bahan bakar: listrik, tipe tiang: dupleks, tinggi konstruksi: 2.150 mm, panjang garpu: 1.150 mm, jenis penggerak: Elektro, lebar konstruksi: 900 mm, Hand pallet stacker Gbodpfoyvl Eqsx Alkol Tipe tiang: Duplex Tegangan baterai: 24V Kapasitas baterai: 300Ah Produsen baterai: IBV Tahun pembuatan baterai: 2022 Initial lift, Roda putar 360100001 TVH 779374

Kondisi: bekas, daewoo-vc500-de Godpfotzgaqex Alkobl

Kondisi: siap digunakan (bekas), Tahun pembuatan: 2005, jarak pergerakan sumbu X: 850 mm, jarak lintasan sumbu Y: 700 mm, jarak gerak sumbu Z: 750 mm, produsen pengendali: FANUC, model controller: Series 21i-MB, kecepatan spindel (maks.): 8.000 rpm, daya motor spindle: 18.500 W, jumlah slot dalam magazin alat: 60, jumlah sumbu: 4, en Gjdpfx Aljyxpplokebl

Kondisi: baru, Tahun pembuatan: 2024, nomor mesin/kendaraan: CATDE715TXRZ00289, jenis bahan bakar: diesel, produsen motor: Caterpillar C15, bauwesen-generator-info Gbjdpfexvk H Rex Alksl

Kondisi: baik (bekas), jarak tempuh: 715.346 km, daya: 266 kW (361,66 hp), pendaftaran pertama: 11/2015, jenis bahan bakar: diesel, ukuran ban: 315 / 70 / R22.5, konfigurasi gandar: 4x2, jarak roda: 5.300 mm, bahan bakar: diesel, rem: pengereman mesin, warna: putih, kabin pengemudi: kabin harian, tipe perpindahan gigi: otomatis, jumlah gigi: 12, kelas emisi: Euro 6, suspensi: baja-udara, jumlah tempat duduk: 2, panjang total: 9.950 mm, lebar total: 2.600 mm, tinggi total: 3.650 mm, beban gandar yang diizinkan (gandar 1): 7.500 kg, beban gandar yang diizinkan (gandar 2): 11.500 kg, panjang ruang muatan: 7.910 mm, lebar ruang muat: 2.490 mm, tinggi ruang muatan: 2.190 mm, Tahun pembuatan: 2015, Perlengkapan: ABS, filter jelaga, kendali jelajah, kopling trailer, kunci diferensial, kunci sentral, pendingin udara, pengaturan jendela elektrik, spion elektrik, spoiler, tail lift,

Kondisi: bekas, Spot Welding Machine, Projection Welding Machine DALEX Type PL 63 Serial No. N-0051390 Year of manufacture: 2018 Rated power at 50% duty cycle: 63 kVA Rated power at 100% duty cycle: 44.5 kVA Maximum welding power: 182 kVA Gjdeycv Sajpfx Alkebl Rated welding current: 8.77 kA Throat depth: 250 - 550 mm Maximum arm spacing: 150 to (310 mm) Upper electrode arm diameter: 50 mm Lower electrode arm diameter: 60 mm Electrode holder diameter: 25 mm Electrode stroke max.: 65 mm Electrode force: 100 - 600 daN Operating air pressure: 1 to 6 bar Power supply: 400 Volts, 50 Hz Rated current: 158 A Connected load: 137 kVA - Thyristor power stage - HARMS+WENDE HWH MPS 10β welding controller - 5-stage control, single spot, multi-spot, 8 programs - Electrode force continuously adjustable via air pressure - Parallel electrode guidance - Single-stroke welding cylinder - Water-cooled via external water cooling (water chiller not included) - Electric foot switch - Control cabinet with controller fixed to the machine - Operating manual Space requirement L x W x H: 1150 x 700 x 1600 mm Weight: 335 kg As-new condition

Kondisi: baru, de Gjdpfskvl Erex Alksbl

Tahun pembuatan: 2023, Kondisi: baru, Anzahl der Spindeln: 6 Maximaler Stangendurchmesser: 32/42 mm Maximale Einzugslänge: 125 mm Spindeldrehzahl: max. 4.250 U/min Diese Maschine eignet sich ideal für die Fertigung von mittleren und großen Serien bis zu einem Durchmesser von 42 mm, bzw. 47 mm in Verbindung mit integriertem Stangenlader. Gsdpfxokvnu He Alkobl Alternativ kann sie als zweite Bearbeitungsmaschine eingesetzt werden, indem Rohteile bis zu einer Maximallänge von 130 mm zur Fertigbearbeitung geladen werden. Optionen: Die Maschine kann mit maximal 7 CNC-Achsen ausgestattet werden, inklusive Siemens 840D-Steuerung und individuell wählbarer Stationen.

Kondisi: sangat baik (bekas), Tahun pembuatan: 1998, Used CNC Horizontal Boring and Milling Machine Brand: AYCE Model: AC100-k4 Serial No.: 740 Year: 1998 Power: 16 kW Weight: 12,700 kg MODEL AC100-K4 WITH CONTINUOUS FEED VARIATION Numerical Control: Heidenhain TNC124 with 4 axes (X, Y, Z, B) Number of bed supports: 4 (K4) OPTIONS: - Heidenhain CNC - Automatic rotary table positioning 4 x 90° - Vertical travel 1200 mm (instead of the 1000 mm standard for this model) - Coolant system - Facing plate and clamping arm - Universal vertical head, Hurón-type, with hydraulic tool clamping - Steady rest for 1200 mm vertical travel - 4th AXIS (B) table rotation digital readout Main spindle: - Spindle diameter: 100 mm - Internal taper: ISO 50 with quick-action tool clamping (instead of Morse 5) - Milling cutter holder diameter: 171.45 mm - Horizontal spindle travel: 700 mm - Vertical spindle travel: 1200 mm - Number of spindle speeds: 18 - Speed range: 12–1200 rpm - Maximum distance between plate and steady rest: 2250 mm Feeds: - Number of working feed rates in all directions: UNLIMITED - Min/max working feeds: 2–1500 mm/min - Rapid traverse on carriages and head: 3000 mm/min - Rapid traverse – main spindle: 1500 mm/min - Rapid traverse – table rotation: 600 degrees/min Rotary Table: - Rotary table dimensions: 1100 x 1200 mm - Longitudinal travel (without steady rest): 1500 mm Gsdjizxbispfx Alkebl - Longitudinal travel (with steady rest): 1200 mm - Cross travel: 1700 mm - Max. distance between spindle axis/table center without steady rest: 1975 mm - Max. distance between spindle axis/table center with steady rest: 1600 mm Automatic centralized lubrication. Hardened and ground guideways. Telescopic way covers. Ball screws on all 3 axes. Automatic hydraulic locks on all axes.

Kondisi: baru, - Exhibition machine - For continuous air supply and intermittent operation Electronic control for reliability and efficiency. Increased flexibility due to two compressed air receivers. Gedpfx Aju R S A Dslkjbl High-quality and expandable configuration. Smooth and quiet running. Suitable for intermittent operation thanks to oil temperature control. DUO KK package with refrigerant dryer and fine filter as a pre-filter upstream of the refrigerant dryer Condensate treatment unit for oil–water separation automatic condensate drain. ----- Technical Data ----- Tank capacity: 2 x 100 litres Effective delivery rate approx. 380 litres Max. pressure: 10 bar Motor: 4.0 kW Speed: 2,880 rpm Sound pressure level: 65 dB Dimensions (LxWxH): 1,200 x 900 x 1,250 mm Weight: 201 kg - new exhibition machine -

Kondisi: perlu perbaikan (bekas), nomor mesin/kendaraan: MT31556, berat keseluruhan: 1.780 kg, warna: abu-abu, arus keluaran: 981 A, tegangan keluaran: 400 V, frekuensi keluaran: 50 Hz, jenis arus keluaran: AC (pendingin udara), daya nominal (semu): 680 kVA, kecepatan rotasi (maks.): 1.500 rpm, suhu lingkungan (maks.): 40 °C, The generator is presented as shown in the photographs. It is offered under the “as is” condition, therefore no warranties or returns are provided. The product was overhauled many years ago and requires inspection before commissioning. For further details, please contact us. Technical specifications: Generator type: MJB 355 MA4 Code: MJB3532G067M0 Weight: 1,780 kg Phases: 3 Serial number: MT31556 Insulation class: H Degree of protection: IP23 Power factor (P.F.): 0.8 S1 CONTINUOUS DUTY (at ambient temperature 40°C): - 680 kVA Voltage: 400 V (star Y configuration) Current: 981 A Frequency: 50 Hz Speed: 1500 rpm Excitation voltage: 26.5 V Excitation current: 3.9 A - 660 kVA Voltage: 220 V (star Y configuration) Current: 1,732 A Frequency: 50 Hz Speed: 1500 rpm Excitation voltage: 26.5 V Excitation current: 3.9 A - 775 kVA Voltage: 440 V (star Y configuration) Current: 1,017 A Frequency: 60 Hz Speed: 1800 rpm Excitation voltage: 24.4 V Excitation current: 3.7 A STAND BY DUTY (at ambient temperature 27°C): - 750 kVA Voltage: 400 V (star Y configuration) Current: 984 A Frequency: 50 Hz Speed: 1500 rpm Excitation voltage: 28.6 V Excitation current: 4.2 A - 855 kVA Voltage: 440 V (star Y configuration) Current: 1,122 A Frequency: 60 Hz Speed: 1800 rpm Gbsdpot Hvftofx Alkel Excitation voltage: 25 V Excitation current: 3.8 A Standards and certifications: Standards: EN 60034-1, IEC 60034-1 CE marked

Kondisi: bekas, Fungsionalitas: belum diuji, Kode Ferwood: RU0011863 - Kode Produsen: 4-075-02-0231 - Kondisi: Bekas - Fungsionalitas: Belum diuji - Mesin yang Kompatibel: - Jika berminat, kami menawarkan layanan rekondisi, silakan hubungi kami. 16KG 46X39X27 Gedpfjymdzwex Alkobl

Kondisi: bekas, 6-axis AC servo drive, servo controller, servo inverter, servo amplifier, servo regulator, frequency inverter, drive controller for robots FANUC type A06B-6105-H003 No. V07Z08282 NEW / unused Input voltage: 200 - 240 VAC Rated output: 1.5 kW Number of axis outputs: 6 Output current: 6 x 13 A Total output current: max. 78 A Manual No.: B-81465 Standard: EN50178 Installed circuit boards: A16B-2000-0063/07D, A16B-3200-0440/05C - Plexiglass cover not included Dimensions (W x H x D): 70 x 170 x 380 mm Weight: 16.5 kg As new / unused in opened original box from warehouse clearance Gbedpfx Ajkpwu Rslkol

Kondisi: bekas, AC spot welding machine, projection welding machine ARO type MA 350 DC AC resistance welding machine Gbsdehpf Iyepfx Alkel Mach. no. MA35031332 / 9731122B110 Year of manufacture: 1997 Output at 50% duty cycle: 30 kVA Output at 100% duty cycle: 21 kVA Maximum welding power: 156 kVA Throat depth: 550 mm Electrode arm diameter: 60 mm Electrode holder diameter: 25 mm Cylinder stroke: max. 80 mm Electrode force: max. 730 daN (at 6 bar), steplessly adjustable Operating air pressure: 0.5 to 6 bar Power supply: 400 Volt, 50 Hz Connected load: 75 kVA / 63 Amps / cable cross-section 3x 16 mm² Maximum sheet combination: 5 mm + 5 mm - Welding control: ARO Micro 2X16 III Version 6Z2P Type 1B (6 timers - 2 programs) - Stepless welding current adjustment via thyristor module - Parallel electrode guidance - Double-stroke welding cylinder (pre-stroke / welding stroke) - Operating modes: single stroke and serial spot welding - Electrode force steplessly adjustable via air pressure - Water-cooled by external recirculating cooler (water chiller not included) - Electric footswitch - Control cabinet with controller mounted directly on machine - PC interface RS 485 - Weld counter - Operating manuals for control unit, spot welding machine and electrical schematic included Space requirement (W x H x D): 520 x 1550 x 1150 mm Weight: 290 kg Very good condition

Kondisi: bekas, Schaffner high-current EMC filter type FS 20364-1200-99 3-phase, 3 x AC ballast, mains connection module, line filter Input voltage: 3 x 400 VAC Input frequency: 50 / 60 Hz Rated current: 3 x 1200 A Dimensions (W x H x D): 135 x 260 x 235 mm Weight: 27.5 kg Godpfxjd D Dh Ae Alkebl Very good condition, from warehouse clearance, unused 2 units available, price per unit

Kondisi: bekas, Programmable AC Power Source / Voltage Regulator Laboratory Power Supply, Power Supply Unit, Programmable AC Power Source CHROMA Model 6415 Ref.: 64150296 Year of manufacture: approx. 2000 Input specifications: Input voltage: 190 ~ 250 V AC Input frequency: 47–63 Hz Input current: max. 12 A Output specifications: Output voltage range: 0 to 150 VAC / 0 to 300 VAC Maximum output current: 15 A / 7.5 A Output power: 1500 VA Efficiency: 80% Number of output phases: 1 Accuracy: 0.2% + 0.2% of F.S. Resolution: 0.1 V Distortion: 0.5% for frequencies 45–500 Hz 1.0% for frequencies >500–1 kHz Line regulation: 0.1% Load regulation: 0.1% Output frequency: 45–1000 Hz Accuracy: 0.1 Resolution: 0.1 Hz Measurements: V, F, I, P, PF, CF MAIN FEATURES: - High measurement accuracy for RMS voltage, RMS current, active power, frequency, power factor, and current crest factor - Integrated power factor correction circuit - Programmable current limitation - Integrated output isolation relays - EEPROM memory for user-defined voltage and frequency combinations for quick recall at any time - Optional GPIB, RS-232, and analog programming interfaces - Overvoltage, undervoltage, overpower, overcurrent, overtemperature, and short-circuit protection - Temperature-controlled fan speed - Self-test on power-up - Supplied as shown, without any additional accessories or connection cables Additional connections: - BNC (EXT VREF) - 9-pin D-Sub (RS-232C interface) - 24-pin Centronic (GPIB) Dimensions (H x W x D): 221.5 x 425 x 567 mm Net weight: 23 kg Good condition Gbjdpfxedz Sraj Alksl

Kondisi: bekas, Programmable AC Power Source – Voltage Regulator Laboratory Power Supply, Bench Power Supply, Programmable AC Power Source CHROMA Model 6415 ID: 641500000 363 Year of manufacture: approx. 2000 Input specifications: Input voltage: 190 ~ 250 VAC Input frequency: 47-63 Hz Input current: max. 12 A Output specifications: Output voltage range: 0 to 150 VAC / 0 to 300 VAC Max. output current: 15 A / 7.5 A Output power: 1,500 VA Efficiency: 80% Number of output phases: 1 Accuracy: 0.2% + 0.2% of F.S. Resolution: 0.1 V Distortion: 0.5% for frequencies 45 - 500 Hz 1.0% for frequencies >500 - 1 kHz Line regulation: 0.1% Load regulation: 0.1% Output frequency: 45 - 1000 Hz Accuracy: 0.1 Resolution: 0.1 Hz Measurement: V, F, I, P, PF, CF MAIN FEATURES: - High measurement accuracy for RMS voltage, RMS current, active power, frequency, power factor, and crest factor - Built-in power factor correction circuit - Programmable current limiting - Integrated output isolation relays - EEPROM memory for user-defined voltage and frequency combinations for instant recall at any time - Optional GPIB, RS-232, and analog programming interfaces - Overvoltage, undervoltage, overpower, overcurrent, overtemperature, and short-circuit protection - Temperature-controlled fan speed - Self-test at power-on Additional connections: - 9-pin D-Sub (Trigger In, AC On, etc.) - 25-pin D-Sub (printer) - BNC (EXT VREF) - 9-pin D-Sub (RS-232C interface) - 24-pin Centronic (GPIB) - 25-pin D-Sub (System I/O) Gbodpfx Alsdz Srbekel - 3x BNC (Sync / Clock / VREF) - Manual in PDF format Dimensions (H x W x D): 221.5 x 425 x 567 mm Net weight: 23 kg Good condition 2 units available, price per unit

Kondisi: baik (bekas), Fungsionalitas: berfungsi sepenuhnya, 100100584V00 (lama 100028262/V00) Gsdpfxoyitfko Alkebl Screen AC Servo Pack SGDH-08AE-SY202, Ver. OF214-0 bekas, telah diuji dan 100100029V00 Screen AC Servo Pack SGDH-15AE-SY202-E (IP1X), Vers. 70942-2 bekas, telah diuji Semua penawaran dapat berubah sewaktu-waktu jika sudah terjual.