Beli Mte Mesin Penggilingan Cnc bekas (77.934)

Kondisi: baik (bekas), Control: Siemens 810 Max. roll grinding diameter: 1000 mm Max. roll grinding length: 5260 mm Fodpfx Asq Dmkwjlyogf Max. roll weight: 16 tons

Kondisi: bekas, Tahun pembuatan: 1995, Mesin Bubut CNC Universal Produsen: HERMLE Tipe: UWF 902 S Tahun Pembuatan: 1995 Jam Operasi: 65.071 Pengendali: HEIDENHAIN TNC 426 Area Kerja X/Y/Z: 600 x 450 x 500 mm Rentang Kecepatan: 20 - 6.300 RPM Pemasangan Alat: SK 40 Sensor M & H 3D (untuk pengukuran benda kerja) Perangkat Pemotongan Vertikal-Horizontal Mandrel Pengebor Sistem Pendingin Meja Putar: 900 x 458 Berat: 4.000 kg Dimensi Mesin: PxLxT kira-kira: 3.900 x 2.000 x 2.000 mm Fjdpfx Aljv Rxa Ssyegf ä3826

Kondisi: bekas, Tahun pembuatan: 1995, Mesin Bubut CNC Universal Produsen: HERMLE Tipe: UWF 902 H Tahun Pembuatan: 1995 Fgjdpev Rpr Sefx Alysf Jumlah Jam Operasi: 46.680 Pengendali: HEIDENHAIN TNC 426 Rentang Pergerakan Sumbu X/Y/Z: 600 x 450 x 500 mm Meja Putar: 900 x 458 mm Sensor 3D Renishaw Rentang Kecepatan: 20 hingga 6.300 RPM Pemasangan Alat: SK 40 Tangki Pendingin Daya Penggerak: 8,6 kW Berat kira-kira: 4.500 kg Dimensi Mesin (P x L x T) kira-kira: 2.950 x 2.200 x 2.300 mm 3826

Kondisi: baik (bekas), CNC grinding machine 3 grinding units per side Fedpfx Aevviamslyjgf

Tahun pembuatan: 1987, Kondisi: baik (bekas), Reform SPW 30 CNC, Mesin Penggiling Berkinerja Tinggi (Mesin Penggiling Rol) Nomor Mesin: 3728-87 Fjdpfx Alsbq A Hueyogf Tahun Pembuatan: 1987 Panjang Penggilingan: 2.000 mm

Kondisi: bekas, TECHNICAL DATA - Distance between centers: 400 mm - Center height: 125 mm - Max. workpiece weight between centers: 150 kg - Z-axis travel: 600 mm - Z-axis rapid traverse: 15 m/min - Table swivel range: +/- 6° GRINDING SPINDLE HEAD - Grinding wheel dimensions: 500 x 80 x 203.2 mm - Peripheral speed: 60 m/sec - Power: 9.5 kW - Head position: -30° WORKPIECE SPINDLE HEAD - Taper: MT5 - Speeds: 5 - 1500 rpm - Power: 2.1 kW - Bore: 34 mm TAILSTOCK - Taper: MT3 - Quill travel: 80 mm ELECTRICAL SUPPLY - Voltage: 400 V - Frequency: 50 Hz - Installed power: 16 kVA WEIGHT AND DIMENSIONS - Required floor space: 3650 x 3050 mm - Machine height: 2000 mm - Machine weight: 4850 kg MACHINE HOURS - Operating hours: 42,000 h EQUIPMENT - CNC: Siemens 840 D - Incremental electronic handwheel - Automatic tailstock center - Diameter and length monitoring - Robot for loading and unloading - Coolant unit - Drip tray - Oil mist extractor Fodjuhbxyopfx Alyegf - Diamond dresser with dresser wheel - Second grinding head with CBN grinding wheel and rotary wheel dresser - Fire extinguishing system* *Note: Functionality not guaranteed. To be verified by a qualified company designated by the buyer.

Kondisi: bekas, TECHNICAL DATA - Distance between centres: 1000 mm - Centre height: 175 mm - Travels (Z/X): 1050 x 275 mm - Max. feeds (Z/X): 10 x 5 m/min - Grinding wheel headstock type: 2 external, 1 internal - External left grinding wheel dimensions: 500 x 63 x 127 mm - Right grinding wheel dimensions: 400 x 63 x 127 mm - Grinding wheel motor power: 7.5 kW - Rotational speed: 1670 - 2110 rpm - Grinding wheel headstock orientation: -15 to +225° - Resolution: 0.001° - Workpiece spindle headstock taper: MT5 - Workpiece spindle headstock speed: 1 - 1027 rpm - Workpiece spindle headstock power: 0.785 kW - Tailstock: MT3 - Quill stroke: 35 mm - Weight: 7000 kg - Hours under power: 47,959 h EQUIPMENT - Distance between centres: 1000 mm - Centre height: 175 mm - Travel (Z/X): 1050 x 275 mm - Max. feeds (Z/X): 10 x 5 m/min - Type of grinding spindle headstock: 2 external grinding wheels, 1 internal grinding wheel Fgodouhbyqepfx Alyof - Left external grinding wheel dimension: 500 x 63 x 127 mm - Right grinding wheel dimension: 400 x 63 x 127 mm - Grinding wheel motor power: 7.5 kW - Rotational speed: 1,670 - 2,110 rpm - Grinding wheel spindle head orientation: -15 to +225° - Resolution: 0.001° - Workpiece spindle headstock taper: Morse type 5 - Workpiece spindle headstock rotational speed: 1 - 1,027 rpm - Workpiece spindle headstock power: 0.785 kW - Counter spindle headstock: Morse type 3 - Tailstock quill stroke: 35 mm - Weight: 7,000 kg - Hours under power: 47,959 h

Kondisi: bekas, translate-001 Fgjdpswwa Ddofx Alysf

Kondisi: bekas, TECHNICAL DATA Fodouhb R Aspfx Alyogf - Min./max. grindable diameter: 1 - 100 [mm] - Max. workpiece length for plunge grinding: 140 [mm] - Min./max. diameter of grinding wheel: 440/610 [mm] - Max. width of the grinding wheel: 80 [mm] - Peripheral speed of the grinding wheel: 50 [m/s] - Speed with new grinding wheel: 1565 [rpm] - Min./max. diameter of regulating wheel: 220/305 [mm] - Max. width of the regulating wheel: 67 [mm] - Max. tilt of the regulating wheel: +/- 7 [°] - Regulating wheel speed during machining: 0/140 [rpm] - Regulating wheel speed during dressing: 200 [rpm] - Installed total power: 41 [kW] - Dimensions (LxWxH): 5920 x 5071 x 2500 [mm] - Net weight: 7000 [kg] EQUIPMENT - CNC SIEMENS 840D control - 5 digitized axes (1 for dressing the grinding wheel; 2 for driven grinding wheel, 1 for upper slide; 1 for lower slide) - Grinding wheel dressing by diamond knurling wheels - Regulating wheel dressing by diamond tips - Automatic part feeding via vibrator - Parts belt conveyor

Kondisi: bekas, TECHNICAL DATA - Centre distance: 200 mm - Centre height: 100 mm - Travel (X/Z): 130 / 170 mm GRINDING WHEELHEAD SPINDLE - Wheel dimensions: 400 x 63 x 127 mm - Peripheral speed: 45 m/s - Power: 3 kW - Orientation: 30° WORKHEAD SPINDLE - Taper: MT4 - Speeds: 600 - 3000 rpm - Power: 0.5 kW - C-axis indexing accuracy: +/- 0.5° TAILSTOCK - Taper: MT2 - Quill stroke: 30 mm ELECTRICAL SUPPLY - Voltage: 400 V - Frequency: 50 Hz - Installed power: 19 kVA DIMENSIONS - Footprint: 1760 x 2180 mm - Height: 2630 mm - Weight: 4,000 kg MACHINE HOURS - Power-on hours: 46,943 h - Operating hours: 21,529 h Fgsdpsuhbxmefx Alyof ACCESSORIES - CNC: FANUC 16TB - Options: Studer Release B, Pictogramming - Interface: RS232C - Electronic offset levers - Direct measuring systems on X and Z axes - Tailstock with fine concentricity adjustment - Hydraulic backlash compensation for tailstock quill - Swivelling dressing wheel on table: FISCHER AES-72x230/3 - Grinding wheel dynamic balancing: DITTEL HBA 4000 - Diameter measuring system: MOVOMATIC ES400 - Loading/unloading robot system: FELSOMAT - Automatic front door - Coolant system - Electrostatic extraction: ELOSTA BF2000 - Pneumatic collet chuck - 1 grinding wheel holder - 1 grinding wheel - Support arm for Zero-G grinding wheel change - 1 balancing arbor

Kondisi: bekas, TECHNICAL DATA - Distance between centers: 400 [mm] - Center height: 125 [mm] - Max. workpiece weight between centers: 150 [kg] - Z-axis stroke: 600 [mm] - Z-axis rapid traverse: 15 [m/min] - Table adjustment: +/- 6 [°] GRINDING SPINDLE HEADSTOCK - Grinding wheel dimensions: 500 x 80 x 203.2 [mm] - Peripheral speed: 60 [m/sec] - Power: 9.5 [kW] - Head position: -30 [°] WORKPIECE SPINDLE HEADSTOCK - Taper: MT5 - Speeds: 5 - 1500 [rpm] - Power: 2.1 [kW] - Bore: 34 [mm] TAILSTOCK - Taper: MT3 - Quill stroke: 80 [mm] ELECTRICAL SUPPLY - Voltage: 400 [V] - Frequency: 50 [Hz] - Installed power: 16 [kVA] WEIGHT AND DIMENSIONS - Required space: 3,650 x 3,050 [mm] - Machine height: 2,000 [mm] - Machine weight: 4,850 [kg] MACHINE HOURS - Operating hours: 31,000 [h] ACCESSORIES - CNC: Siemens 840 D - Offset electronic handwheel - Automatic tailstock center Fodjuhbx Hopfx Alyegf - Diameter and length measurement system - Robot for loading and unloading - Cooling unit - Coolant tray - Oil mist extractor - Diamond dresser with wheel - 2nd grinding head with CBN grinding wheel and rotary wheel dresser - Fire extinguishing system* *NB: Functionality not guaranteed. To be checked by a qualified company appointed by the buyer.

Kondisi: bekas, TECHNICAL DATA - Min./max. grindable diameter: 1 - 100 [mm] - Max. workpiece length in plunge grinding: 140 [mm] - Min./max. diameter of grinding wheel: 440/610 [mm] - Max. width of the grinding wheel: 80 [mm] - Peripheral speed of grinding wheel: 50 [m/s] - Speed with new grinding wheel: 1565 [rpm] - Min./max. diameter of regulating wheel: 220/305 [mm] - Max. width of regulating wheel: 67 [mm] - Max. inclination of regulating wheel: +/- 7 [°] - Regulating wheel speed during operation: 0/140 [rpm] - Regulating wheel speed during dressing: 200 [rpm] - Installed total power: 41 [kW] - Dimensions (LxWxH): 5920 x 5071 x 2500 [mm] - Net weight: 7000 [kg] ACCESSORIES Fgjdpfeuhb R Njx Alyof - CNC SIEMENS 840D control - 5 digitized axes (1 for dressing the grinding wheel; 2 for powered grinding wheel; 1 for upper slide; 1 for lower slide) - Dressing of grinding wheel by diamond knurl wheels - Dressing of regulating wheel by diamond-tipped tools - Automatic workpiece feeding via vibrator - Parts belt conveyor

Kondisi: bekas, de-to-en-001 Fsdpfxsw Tnhbj Alysgf

Kondisi: bekas, TECHNICAL DATA - Centre Height: 125 mm - Distance Between Centres: 400 mm - Grinding Wheel Dimensions: 400 x 127 x 50 mm - Power: 4 kW - Max. Workpiece Weight: 30 kg - Space Requirement: 3000 x 3520 mm Fodpfx Aleuhbxtoyjgf - Weight: 4000 kg EQUIPMENT - FANUC 21i-T CNC - B-axis with 1° accuracy - 3-jaw chuck - Tool holder flanges - 1 external grinding wheel - 1 dressing device - Counter centre with fine adjustment - 1 internal grinding device with spindle 42,000 rpm - Coolant tank with paper filter - Workpiece probe

Kondisi: bekas, TECHNICAL DATA - Distance between centres: 650 mm - Centre height: 175 mm - Max. workpiece weight between centres: 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 swivel range: 0 - 8.5° 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° - Minimum increment: 2.5° - Internal grinding: 40,000 rpm - Power: 3 kW WORKPIECE HEADSTOCK - Taper type: MT5 - Speed: 1 - 1,500 rpm - Power: 1.8 kW - Bore: 30 mm - Minimum resolution C-axis: +/- 0.5° Fedpfxjylc R Us Alyogf TAILSTOCK - Taper type: MT4 - Quill diameter: 50 mm - Quill stroke: 35 mm ELECTRICAL SUPPLY - Supply voltage: 400 V - Total power/drive capacity: 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 OPERATING HOURS - Power-on hours: 190 h ACCESSORIES - Control: FANUC Oi-TD - Electronic handwheel - 3-colour status beacon - Oil mist extraction unit - Linear measurement systems axes: X / Z - Dynamic balancing of grinding wheels: MPM - Automatic contact detection: SENSITRON 6 - Fixed dressing device - Workpiece measuring probe - Coolant tank: 375 l * with paper filter

Kondisi: bekas, TECHNICAL DATA - Workpiece diameter: 0.5 - 40 [mm] - Max. plunge grinding length: 95 [mm] WORKING GRINDING WHEEL - Grinding wheel width: 100 [mm] - Peripheral speed: 35 [m/s] - Grinding wheel speed: 2228 [rpm] - Min. wheel diameter: 260 [mm] - Max. wheel diameter: 406 [mm] DRIVE GRINDING WHEEL - Grinding wheel width: 100 [mm] - Wheel inclination: +/- 6 [°] - Min. diameter of drive wheel: 150 [mm] Fgjdpfsuhb Rcox Alyef - Max. diameter of drive wheel: 205 [mm] SUPPLY - Power: 20 [kW] - Supply voltage: 400V, 50 [Hz] DIMENSIONS - Required space: 4090 x 1640 [mm] - Machine height: 2,100 [mm] - Machine weight: 2,700 [kg] EQUIPMENT - CNC: SIEMENS SINUMERIK 840 D

Kondisi: bekas, TECHNICAL DATA - Workpiece diameter: 0.5 - 40 [mm] - Max. plunge grinding length: 95 [mm] GRINDING WHEEL - Grinding wheel diameter: 350 [mm] - Grinding wheel width: 120 [mm] Fgodpfx Aeuhb Rpolysf - Peripheral speed: 50 [m/s] - Grinding wheel speed: 2352 [rpm] - Min. wheel diameter: 260 [mm] - Max. wheel diameter: 406 [mm] DRIVE WHEEL - Wheel width: 120 [mm] - Wheel inclination: +/- 6 [°] - Min. drive wheel diameter: 150 [mm] - Max. drive wheel diameter: 205 [mm] SUPPLY - Power: 21 [kW] - Supply voltage: 400V, 50 [Hz] SPACE REQUIREMENTS - Dimensions: 3965 x 3103 [mm] - Machine height: 2,100 [mm] - Machine weight: 2,800 [kg] ACCESSORIES - CNC: SIEMENS SINUMERIK 840 D

Kondisi: bekas, TECHNICAL DATA - Number of axes: 5 - Distance between centers: 400 [mm] - Usable diameter: 180 [mm] LINEAR AXES Fgodpfevxw A Uex Alyef - Travel X1 and X2 x Z: 220 [mm] - Travel Z: 850 [mm] - Resolution X x Z: 0.0001 [mm] TURRET: - Number of fixed positions: 12 - Tool holder: VDI30 GRINDING WHEEL HOLDER HEADSTOCK - External grinding, right: * Grinding wheel dimensions (Ø x width x bore): 400 x 50 x 127 [mm] * Drive power: 6.8 [kW] WORKPIECE SPINDLE HEADSTOCK - Max. spindle speed: 7500 [rpm] - Spindle speed (synchronous speed): 1 - 5000 [rpm] - Taper type: MT4 - Drive power: 10.5 [kW] - C-axis: 0.001 [°] SYNCHRONIZED SUB-SPINDLE - Max. spindle speed: 7500 [rpm] - Spindle speed (synchronous speed): 1 - 5000 [rpm] - C-axis: 0.001 [°] - Internal taper: MT4 - Micrometric adjustment: +/- 40 [microns] - Drive power: 10.5 [kW] POWER SUPPLY - Power requirement: 45 [KVA] DIMENSIONS - Space requirement: 2800 x 3960 [mm] - Machine weight: 7600 [kg] MACHINE HOURS - Power-on hours: 57000 [h] ACCESSORIES - CN FANUC 310i-modelA - StuderWIN software - RS232 / USB interface - Remote electronic handwheel - Turret head with automatic length calibration Renishaw LP2 - Marposs diameter probe (multirange) + Z4-axis for positioning - Semi-automatic grinding wheel balancing unit MPM.3 BMT100 M.24 - Coolant tank 480 L * with paper filter * with magnetic filter - Chip conveyor - Mist extraction unit - Cooling unit for grinding wheel motor cooling - Dittel AE6000 electronic touch detection - Stationary dressing device on workpiece spindle headstock - Electrical cabinet air conditioning - Balancing arbor - Interface for automatic loading system

Kondisi: bekas, TECHNICAL DATA - Number of axes: 5 - Maximum tool diameter: 150 mm - Maximum tool length in manual mode: 300 mm - Maximum tool length in automatic mode: 140 mm - Maximum tool weight: 25 kg WORKPIECE HEAD (A axis) - Interface: SA 50 - X/Z travel: 360 / 300 mm - A axis travel: 360° - Maximum speed: 800 rpm GRINDING HEAD (B axis) - Interface: HSK-E40 - Y travel: 200 mm - B axis travel: -30 / +180° - Grinding wheel diameter: 125 mm - Maximum speed: 20,000 rpm - Spindle power: 7 kW GRINDING WHEEL MAGAZINE - Positions: 4 TOOL MAGAZINE - Type: with SCHUNK clamping system, via linear axes Fgedpfxjuhbzuj Alyof - Tool length: 40 – 140 mm - Number of tools Ø4-6 per pallet: 200 - Number of tools Ø6-10 per pallet: 96 - Number of tools Ø6-16 per pallet: 54 VOLTAGE - Main voltage: 400 V - Total power: 19 kW DIMENSIONS - Required space: 2,300 x 3,350 mm - Height: 2,600 mm - Weight: 2,500 kg ACCESSORIES - CNC: NUM AXIUM Power P2 - Software: Easygrind 6.08 - Glass scale on X/Y/Z: HEIDENHAIN - Coolant system for grinding spindle - Coolant tank with pumps: 10 bar * with retractable nozzle - Oil mist extraction: ELBARON RON/A 100 DV - Tool air blast - Fire extinguishing system * Note: Work order not guaranteed. To be verified by a qualified company of the buyer. - Number of grinding wheel holders: 12 - Number of pallets: 4 - 1 collet chuck SA50 with automatic clamping - 1 collet chuck SA50 with manual clamping, capacity Ø: 32 mm - 1 collet chuck SA50 with manual clamping, capacity Ø: 20 mm - 1 MASTER for self-calibration of axes and probe

Kondisi: bekas, DATA TEKNIS - Jarak antara titik tengah: 1000 [mm] - Tinggi titik tengah: 180 [mm] - Berat benda kerja maksimum antara titik tengah: 100 [kg] DUDUKAN SPINDEL GERINDA - Penggerindaan luar * Daya: 7,5 [kW] * Dimensi roda gerinda: 500/80/203 [mm] DUDUKAN SPINDEL PENAHAN BENDА - Kecepatan: 10-800 [RPM] SUPPLAI LISTRIK - Tegangan suplai: 400 [V] AKSESORI - Pengontrol: Fanuc Oi-TF - Lampu indikator status tiga warna - Peralatan pengukur alat: Marposs - Tangki pendingin Fgjdpfx Ajzrp Edolyjf * dengan filter kertas * dengan pendingin pendingin

Kondisi: bekas, machineseeker-2024-06-07-001 Fodpfjxz Hrmjx Alyjgf

Kondisi: bekas, 1 Fjdpfxjy Tb Aao Alyjgf

Kondisi: bekas, DATA TEKNIS MEJA - Ukuran meja: 2700/850 [mm] - Beban maksimum pada meja: 6000 [kg] - Jarak perjalanan sumbu X/Y/Z: 2500/1000/1100 [mm] - Kecepatan gerakan cepat (X/Y/Z): 15 [mm/menit] KEPALA PEMOTONG Kepala manual SPINDEL PEMOTONG - Dudukan alat: ISO50 * Kecepatan spindel: 3000 [RPM] * Daya penggerak spindel: 25 [kW] PENGGANTI ALAT - Tipe pengganti alat: Bras chargeur - Jumlah alat di majalah: 24 BERAT DAN DIMENSI - Ruang yang dibutuhkan: 6820/3800 [mm] - Tinggi mesin: 2870 [mm] - Berat mesin: 12500 [kg] Fedpfx Aoznd D Telyegf PASOKAN LISTRIK - Tegangan pasokan: 400 [V] - Total daya: 38 [kW] JAM KERJA MESIN - Jam saat mesin menyala: 23201 [jam] - Jam operasi: 7902 [jam] - Jam spindel: 7638 [jam] AKSESORIS - Pengontrol: Heidenhain iTNC530 Antarmuka: RS232/RJ45/USB - Pemrograman Teach-In - Tangki pendingin * dengan pompa bertekanan tinggi: 20 [bar] - Pasokan pendingin internal (IKZ) - Pengangkut serpihan

Kondisi: bekas, TECHNICAL DATA - Number of Axes: 3 - Centre Height: 175 mm - Distance Between Centres: 1000 mm LINEAR AXES - Grinding Length: 500 mm - Travel X x Z: 267 x 650 mm GRINDING SPINDLE HEADSTOCK - Continuous Orientation: +/-8.5° - External Grinding Wheel Dimensions: 500 x 80 x 203 mm Fsdpfxeuhbyde Alysgf - Grinding Wheel Holder Spindle Headstock Power: 7.5 kW - Cutting Speed: 44 m/s WORKPIECE SPINDLE HEADSTOCK - Taper Type: MT5 - C-Axis: +/-0.5° - Power: 1 kW - Rotational Speed: 30–1,000 rpm TAILSTOCK - Taper Type: MT3 - Quill Stroke: 35 mm - Quill Diameter: 50 mm - Max. Workpiece Weight Between Centres: 130 kg ELECTRICAL SUPPLY - Supply Voltage: 400V 50 Hz - Machine Dimensions: 2700 x 2350 x H. 2100 mm - Weight: 4,000 kg OPERATING HOURS - Operating Hours: 17,775 h ACCESSORIES - CNC FANUC 16i-TA Control - Pictogramming - Studer RELEASE C - Remote Control with Electronic Handwheel - SENSITRON - Hydrobalance HBA 40000-1 Dynamic Balancing Device - MOVOMATIC C25 Automatic Length Probing Arm - MOVOMATIC In-process External Diameter Measuring Arm - Grinding Wheel Guard with Automatic Tilting - Fixed Diamond Dressing Device on Workpiece Spindle Headstock - Coolant Tank: 375 l - Paper Filter - Oil Mist Extraction - Grinding Wheel Flange Holders

Kondisi: bekas, TECHNICAL DATA - Workpiece diameter: 2 - 175 [mm] - Max. plunge grinding length: 240 [mm] WORKING GRINDING WHEEL - Grinding wheel diameter: 610 [mm] - Grinding wheel width: 250 [mm] - Peripheral speed: 50 [m/s] - Grinding wheel speed: 1873 [rpm] DRIVE GRINDING WHEEL - Grinding wheel width: 250 [mm] - Wheel inclination: +/- 7 [°] SUPPLY - Total drive power: 30 [kW] - Supply voltage: 400V, 50 [Hz] DIMENSIONS - Floor dimensions: 3600 x 4700 [mm] - Machine height: 2400 [mm] - Machine weight: 7700 [kg] ACCESSORIES Fgedpeuhb Riofx Alyjf - CNC: SIEMENS SINUMERIK 840 D - Hydraulic balancing device SHS - Infeed device GFA - Extraction unit