Used Amada Hfbo 103 for sale (1,730)

Condition: good (used), Year of construction: 2002, Technical specifications Dcedpfxsv Tzvhs Ac Hoi Ø: 700 mm Rectangular: 800 x 700 mm

Condition: used, Year of construction: 2015, Working hours machine: 31888 (17.01.2024) h Working hours laser on: 19090 (17.01.2024) h Working hours beam on: 6475 (17.01.2024) h Laser power: 4000 Watt Max. punching force: 300 kN Control: AMNC 3i Working range laser: 2500 x 1170 mm Working range punching: 3050 x 1525 mm Length: 7870 mm Width: 5880 mm Height: 2666 mm Electrical connected load: 85 kVA x-axis: 100 m / min y-axis: 80 m / min Djdoypt R Hjpfx Ac Hsci Weight of machine approx.: 30000 kg Standard configuration - Patented servo-electric double drive- Punching force 300 kN- 32 tool stations (4 rotatable stations)- max stroke rate: 400- max material thickness 6mm- Automatic focus adjustment- Automatic gas pressure control- HS sensor cutting head- Nozzle cleaning- Splash guard- Good parts flap Extended machine accessories - TSU tool changer 300 Automation

Condition: used, Year of construction: 2004, functionality: fully functional, Amada HFE 220- L Year of construction 2004 Laser height adjustment Dsdsuiwypepfx Ac Heci Working width 3100mm pressing force 220 tons with many tools

Condition: good (used), Year of construction: 2003, Horizontal bandsaw fully automatic with gripper feed Cutting capacity 90° round: 400 mm square: 400 x 400 mm Cutting speed: 15 - 90 m/min Working height: 800 mm Saw blade dimensions: 4570 x 41 x 1.3 mm Material feed per stroke: 560 mm Multiple feed: up to 9 times = 5040 mm Motor power: 5.5 kW Dimensions (L x W x H): 2250 x 2850 x 1700 mm Weight: 2500 kg Accessories / Special features: • Fully hydraulic: workpiece clamping, saw feed, bow lifting, and material feed Djdpsynaz Njfx Ac Hjci • Gripper feed system • Screw conveyor swarf remover • Fully automatic operation or single cuts • Automatic bow lifting height adjustment according to material diameter • Max. cut length: 560 mm with single feed • 5040 mm with multiple feed • Hydraulic clamping pressure regulation for the vise • Saw band guidance via deflection rollers and carbide jaws • Constant saw band tension with automatic shutdown in case of blade breakage • Coolant system • Piece counter • Emergency stop switch • CE compliant Siegfried Volz Werkzeugmaschinen Rüschebrinkstr. 151-153 DE - 44143 Dortmund - Wambel

Condition: ready for operation (used), tool grinding machine working perfectly Dcedpfx Ajyw N D Tsc Hji

Condition: refurbished (used), Year of construction: 2001, AMADA MODEL HFE 130-3 130 tons capacity x 3000 bending length hydraulic downstroking press brake complete with OP 2000 7 AXIS cnc control, ERWIN SICK machine mounted electronic guards , side and rear interlocked fencing Model Amada HFE 130-3 downstroke CNC Press brake Year 2001 Tonnage 1300 KN Type OP 2000 CNC Controlled Axis Y1, Y2, X, R1 R2 Z1 Z2 Max. Bend Length 3000 mm Open height 470 mm Stroke Length 200 mm Approach Speed 100 mm/sec Bending Speed 1 - 10 mm/sec Return Speed 1-100 mm/sec Oil Capacity 110 LITRES Motor Power 11 kw Weight 7800 KG kg CNC Control Backgauge Stoke (X axis) 700 mm/s Max gauge 1000mm R axis 250mm can be demonstrated under power BROCHURE AND FURTHER INFORATION AVAILABLE UPON REQUEST Djdpfx Acsthgidj Hsci

Condition: excellent (used), Year of construction: 2002, Model .Amada. Vipros 368 King Stock number 01967 Year of manufacture 2002 Dcedpsvn D Tfofx Ac Hei Frame Construction ... Bridge Type Press Capacity ... 30 Tonnes (294 kN) Press Type ... High Speed Hydraulic Servo Ram Axis Traverse Distance ... 1525 x 2000 mm Workable Max. Sheet Size ... 1525 x 4000 mm (with auto repositioning) Max. Material Thickness ... 3.2 mm mild steel Max. Hole Dia. Max. Material ... . (shearing strength 36 kg/mm2) 82 mm dia Max. Material Weight ... 75 Kg Max. Material weight ( Max. Speed) ... 60 Kg Max. Hole Dia. ... 114.3 mm Number Of Stations ... 58 stations:24 x 12.7 mm 24 x 31.7 mm 4 x 50.8 mm 2 x 88.9 mm Auto Index 2 x 31.7 mm 2 x 114.3 mm Axis Speed ... 113.0 m/min Hits Per Minute (2mm pitch) ... 860 H.P.M./3 mm stroke (8mm pitch) ... 560 H.P.M./3 mm stroke (25mm pitch) ... 460 H.P.M./3 mm stroke Turret Speed Bi-Directional ... 30 R.P.M. Punching Accuracy ... ± 0.1 mm (incl. 1 reposition) Ram Stoke Length (maximum) ... 40 mm Tool Lubrication ... Air Blow System Axis Drive ... AC Servo Motor Turret Drive ... AC Servo Motor Electric Power Required ... 28 kVA 400V +/- 10% 50Hz Air Pressure Required ... 5.0 Kgf/cm2 Air Flow ... 250 1/min Cooling Water Flow ... Min 40 1/min. Machine Length ... 5025 mm Machine Width ... 4120 mm Machine Height ... 2630 mm (3190 mm to mirror) Machine Weight ... 18000 Kg

Condition: excellent (used), functionality: fully functional, Year of construction: 2012, operating hours: 31,835 h, laser type: CO₂ laser, laser source model: AF4000i-B, laser power: 4,000 W, sheet thickness (max.): 22 mm, sheet thickness stainless steel (max.): 15 mm, travel distance X-axis: 3,070 mm, travel distance Y-axis: 1,550 mm, workpiece weight (max.): 920 kg, overall weight: 10,500 kg, total length: 6,750 mm, total width: 2,850 mm, total height: 2,300 mm, Equipment: cooling unit, documentation/manual, dust extraction, fume extraction, OPPORTUNITY!! We offer a used Amada FOMII 3015 NT laser cutting machine, year of manufacture 2012. Amada FO MII 3015 NT Laser Cutting Machine Operating hours: 31,835 h (at the time of documentation) Service: see logs from the control panel Working area (cutting surface): 3070x1550 mm Maximum workpiece weight: 920 kg Resonator power: 4 kW (oscillator AF4000i-B) Machine weight: approx. 10,500 kg Machine dimensions (W x D x H): approx. 6750x2850x2300 mm Manuals and some spare parts included. Djdpfx Acoywz A Us Heci More technical data can be found in the photos and in the file below ("Installation Summary"). Serial number: 092 / 2712 Installation date: 2014 Load capacity: 3,000 kg Max./min. sheet size: 3000x1500 mm / 2000x1000 mm Net weight: approx. 12,700 kg Dimensions without edges, "balcony," and front table: W x D x H approx. 4300x2450x5100 mm The machine is in perfect condition—very well maintained, serviced regularly. Price for the complete set: laser + storage tower Amada LC3015M2 / ASLUL300FOM2 Includes chiller, filtration system, etc. For any questions or if you need additional information, please send us a message or call. The machine is already secured and prepared for transport. Machine pickup in Radom.

Condition: used, Year of construction: 2002, functionality: fully functional, stroke length: 2,600 mm, overall weight: 12,000 kg, punching force: 20 t, Amada Europe 2510 machine, in perfect working condition. Sheet metal working dimensions: 3500 mm x 1500 mm, with thicknesses up to 5 mm. Equipped with a fully operational automatic loading system. Dsdpfxsywwzte Ac Hjci

Condition: excellent (used), Year of construction: 2007, Technical specifications: Max. cutting width: 4050 mm Max. cutting capacity for steel (ST40): 8.0 mm Dedpeywd Ndefx Ac Hoci Max. cutting capacity for stainless steel: 6.0 mm Max. cutting capacity for aluminium: 8.0 mm Motorized adjustable backgauge: 1000 mm Cutting gap adjustment Cutting angle adjustment: 2.2° Sheet support device Motor power: 15 kW Dimensions (L x W x H): approx. 4800 x 2200 x 2150 mm Weight: approx. 11.5 tons The seller is not liable for typographical or data transmission errors. The machine is in condition, technically and visually, corresponding to its age; used machines are sold without any warranty.

Condition: ready for operation (used), Year of construction: 2005, machine/vehicle number: HFP 130-3 N050242, functionality: fully functional, operating hours: 4,970 h, stroke length: 200 mm, overall weight: 8,170 kg, bending force (max.): 132 t, working length: 3,100 mm, TECHNICAL DETAILS Pressing force: 1,300 kN Max stroke: 200 mm Working length: 3,100 mm MACHINE DETAILS 8-axis configuration: Y1, Y2, X1, X2, R1, R2, Z1, Z2 Weight: 8,170 kg Voltage: 400 V Frequency: 50 Hz Dedpfx Acoylv Rhe Hsci Rated current: 213 A Operating hours: 4,970 h EQUIPMENT Automatic Fiessler Alas laser system Euro-style tool clamping with quick-change adapters

Condition: ready for operation (used), Year of construction: 2000, pressure 170 t chamfer lenght 3170 mm distance between columns 2700 mm column arm 420 mm dayligth 470 mm stroke 200 mm ajustment speed 100 mm/sec working feed 10.0 mm/sec return speed 100 mm/sec table width 180 mm table height 960 mm oil volume 235 L 0 300 bar controlled axis 6 Anzahl Number of working hours 29.400 h total power requirement 16.5 KW weight of the machine ca. 11910 kg range L-W-H 4025 x 2020 x 2900 mm Dcjdexabgpjpfx Ac Hoi well-maintained condition (!!) with only approx. 29.400 operating hours - in checked condition - machine video - ?v=APP0HZjMms4 Equipment: - electro-hydraulic CNC press brake - AMADA CNC control "OPERATEUR 2" - 6 axes (X, Y1 + Y2, R, Z1 + Z2) * swiveling operation - front left * tool & program library - CNC-controlled back stop adjustment (X-axis) * adjustment range .. 700 mm - CNC-controlled vertical adjustment of the stop fingers (R-axis) * adjustment range .. 250 mm - CNC-controlled adjustment of the stop fingers left-right (Z1 + Z2) - hand control unit for manual movement of the axes - AMADA manual upper tool clamping system - AMADA Rehfuß upper tools - divided - AMADA Lower tool holder - incl. 1x V die (not complete) - AMADA DIGI PRO - gigital angle measuring system - 1x freely movable double foot switch - side protective device (swinging doors) - rear protective device (swinging door) - EMERGENCY OFF button at the front - Operating instructions (ENG)

Condition: ready for operation (used), Year of construction: 2001, pressure 50.0 t chamfer lenght 2090 mm distance between columns 1665 mm column arm 400 mm table width 60.0 mm ajustment speed 100 mm/sec working feed 10.0 mm/sec return speed 92.0 mm/sec stroke 200 mm table height 910 mm dayligth 470 mm Number of working hours 36.160 h total power requirement 6.0 KW Dcsdpfx Acoxabute Hei weight of the machine ca. 4850 kg range L-W-H 3458 x 2450 x 2450 mm with only approximately 36.160 operating hours (!!) - Inspected condition - Machine video - ?v=x8Z0h2_wA6s Equipment: - CNC electro-hydraulic press brake - CNC control type OPERATEUR 2 with 8 axes (X1+X2, Y1+Y2, R1+R2, Z1+Z2) * CNC-controlled backgauge adjustment (X-axis) * CNC-controlled vertical adjustment of the stop fingers (R1+R2) * CNC-controlled left-right adjustment of the stop fingers (Z1+Z2) * Hand control unit for manual axes movement * Pivoting control, front left - AMADA/PROMECAM quick clamping system for the upper tool * 1 split set of offset upper tools (UKB 10.512) - AMADA/PROMECAM bottom tool holder * 1x split set of 1-V dies (UKB 20.810) - Side guards (hinged doors) - Rear guards (hinged door) - CE marking - 1x freely movable double foot switch - Operating instructions (PDF)

Condition: ready for operation (used), Year of construction: 2007, sheet width 3050 mm plate thickness 6.35 mm thickness at "Niro-steel" 4.00 mm 8.00 mm down holder 10 Stück cutting angle 0°40 - 2°20 Grad Dcodpfx Aexaaghsc Hei 3340 mm work height max. 860 mm 575 mm Control GP 37W2 13 - 33 0 max. 315 bar oil volume 100 ltr. total power requirement 6.0 kW weight of the machine ca. 6030 + 1850 kg In good condition (!!) current new price including accessories approx. 110.000 Euro Special price upon request - in checked conditions - machinevideo - ?v=3JUqSaaJkFQ Equipment: - Robust CNC electro-hydraulic guillotine shear - AMADA CNC touch control, front left ("GP 37W2") * Machine control including information display * Main display with 4 control panels * Control/operation of all functions * Max. 50 cutting programs with 15 sequences each - CNC electro-motorized backgauge * Travel speed 100 mm/sec. - CNC electro-hydraulic cutting angle adjustment - CNC electro-hydraulic cutting gap adjustment - Sighting device & cutting line illumination for viewing the scribe line * ??Shear cutting according to the optical scribe line - Manually adjustable table support plates, including ball transfer units * Grip recesses in the front support table - 2x freely movable foot switches - Operating instructions + circuit diagram SPECIAL ACCESSORIES included: - Backgauge system with 3 stations + separate control: * STATION 1 - AMADA conveyor belt with pneumatic sheet support device * STATION 2 - AMADA conveyor belt with pneumatic scrap deflector * STATION 3 - AMADA stacking device with scissor lift table device - Wooden box with spare knives - 1x AMADA extra-long side stop, with support foot * Length approx. 3.000 mm - 2x AMADA extra-long front support arms

Condition: excellent (used), Year of construction: 2007, functionality: fully functional, operating hours: 16,381 h, Used AMADA press brake Model: HFT 130-4 Capacity: 4000 x 130T Number of axes: 4 Y1 Y2 X and R AMADA automatic table crowning CNC: CD2000 Axes retrofitted with new drive units New safety light curtains along entire length Fast working speed (laser): 100 mm/sec Clearance between uprights: 3,760 mm Total length: 5,480 mm Depth: 3,000 mm Height: 2,900 mm Weight: 11.5 tonnes Dedpfx Aoykyuzjc Heci Machine videos available on request.

Condition: used, Offer 41414 Dcedpoxhfhmjfx Ac Hei Guide unit for punching tool suitable for AMADA type EMK 3612

Year of construction: 2000, condition: good (used), Used Amada Tp150ex 150ton press / stamping machine Amada TP150 EX electric Power Press with feed Atkin Bhp feed and Atkin BHP decoiler Dodon Smg Tspfx Ac Hjci New/year 2000 TP150 Model Amada TP-150EX Weight 16 tons Accessories Sick Guards Hydraulic Overload Variable Speed Drive Hydraulic Tool Clamping Capacity 15o tons Supplied New July 2000 Stroke 175mm Bed Area 1250 x 750 x 160mm Ram Area 700 x 550mm Ram Adjustment 100mm (motorised) Die Height 390mm Ideal for automotive or aerospace sheet metal press work New c and h frame presses also available.

Condition: used, Used cheap Amada Its 2 2.5metre x 80ton 7axis cnc pressbrake Used cheap Amada Its 2 2.5metre x 80ton 7axis cnc pressbrake PRESS BRAKE HYDRAULIC Dcedpfefuaqmsx Ac Hoi CAPACITY: 80 TONS BENDING LENGTH: 2500mm CONTROL: OPERATEUR NO OF AXIS: 7 FRONT GUARDS ERWIN SICK MACHINE MOUNTED SIDE AND REAR INTERLOCKEDFENCING

Year of construction: 2012, condition: excellent (used), Used compact / small foot print Amada Lasmac LC – 1212 a IV NT flat bed 2d cnc laser cutting machine for sale: Fully serviced single bed very clean Amada LC – 1212 a IV NT cnc laser – Video at the bottom of this listing Specification: Most recent work carried out by Amada UK: New turbo blower recently fitted New lenses and mirrors in August 2022 Fully serviced with Amada Uk Year / New 2012 Power: 2.5kw Machine Model: LC – 1212 a IV NT Travel method: X-Axis Material Travel, Y Axis: laser Beam Travel Dodpfx Asimwcbjc Heci Axis Travel Distance X x Y x Z M: 1270 x 1270 x 300 Positioning Speed X x Y x Z m/min: 80 x 80 x 60 Cutting feed rare X x Y m/min: 0 – 20 Control Method: X-, Y- and Z-axes (simultaneously controlled) + B – axis Max. sheet size X x Y x Zmm: 2540 x 1270 x 300 Repeatable positioning accuracy mm: +0.005 Oscillator model: AF2000E-LU2.5 AF4000E Oscillation Process: fast axial flow, high frequency discharge excitation Ideal if you are looking to bring laser cutting in house and space is a premium Delivery and installation can be arranged AMADA LASMAC LC1212 MK IV 2.5 KW NT LASER CUTTING MACHINE MACHINE CAPACITY 1270 X 1270 2540 WITH ONE REPOSITION

Condition: excellent (used), Year of construction: 2012, functionality: fully functional, pressing force: 220 t, working width: 4,100 mm, working range: 4,100 mm, Model: Used Amada HFE M2 220t 4metre x 220ton, 8 axis Press Brake For Sale Hydraulic Down Stroke Year 2012 Tonnage 220 tonnes Max. Bend Length 4280 mm Stroke Length 200 mm Approach Speed 1 - 100 mm/sec Bending Speed 1 - 10 mm/sec Return Speed 1 - 100 mm/sec Oil Capacity 195L Motor Power Dedpfx Ajv Tdbgsc Hoci Weight 17450 Kg Dimensions Machine Length 5070 mm Machine Depth 2075 mm Machine Height 3085 mm Distance Between Side Frames 3760mm Beam width 180 mm Table height 960 mm Open Height 470 mm Throat Depth 420 mm

Condition: excellent (used), Year of construction: 2001, functionality: fully functional, working width: 3,100 mm, bending force (max.): 130 t, control type: CNC control, number of axes: 6, Equipment: CE marking, european tool clamping system, lower tooling, safety light barrier, upper tooling, Used Amada HFE 3metre x 130ton cnc pressbrake for sale TYPE HYDRAULIC DOWNSTROKING CAPACITY 130 TONS CONTROLLED AXIS Y1, Y2, X, R1 R2 Z1 Z2 MAX BEND LENGTH 3000 MM OPEN HEIGHT 470 YEAR 2001 STROKE LENGTH 200 THROAT DEPTH 420 MOTOR POWER 11 KW FRONT GUARDING MACHINE MOUNTED ERWIN SICK ELECTRONIC SIDE Dodpfx Acjw Ugg Ee Heci INTERLOCKED FENCING REAR INTERLOCKED FENCING TONNAGE 1300 KN APPROACH SPEED 100 MM/SEC BENDING SPEED 1 – 10 MM/SEC RETURN SPEED 1-100 MM/SEC OIL CAPACITY 110 LITRES WEIGHT 7800 KG BACK GUAGE STROKE (X AXIS) 700 MM/S MAX GUAGE 1000MM

Condition: excellent (used), Year of construction: 2011, power: 4 kW (5.44 HP), MODEL USED AMADA LC 3015 FI NT 4 KW CNC LASER CUTTING MACHINE WITH LST3015 F1 TWIN SHUTTLE TABLE and TOWER SYSTEM FOR SHEET LOAD AND UNLOAD CAPACITY FOR SALE description AMADA LASER MODEL LC3015 F1 4KW AF 4000i-B CONTROL AMNC-PC MAX LASER OUTPUT 4000 / 4KW Year 2008 MAX SIMULTANEOUS FEEDRATE M/PER/MIN (X/Y 170M/MIN MAX SHEET SIZE 3070 X 1550 X 100 (Z AXIS) MAX MATERIAL THICKNESS 20 mm M.S. Djdpfx Aceqcu Eqe Hoci MAX MATERIAL THICKNESS 12 mm MAX MATERIAL THICKNESS ( ALUMINIUM A5052) 10 mm

Year of construction: 2003, condition: excellent (used), Amada GS 630 sheet metal hydraulic cutting machine for sale G Series Hydraulic Shear – Video at the bottom of this listing Specification: Model: 630 Max Plate Thickness mild steel (mm): 6.35 Max Plate Thickness stainless steel (mm) 4 Max Cut Length (mm) 3050 Max Stroke / min 35 Dcjdpfx Acjimwcqs Hoi Motor Size (Kw) 5.5 Machine Weight (Kg) 6150 Back gauge speed (mm/s) 100 Back gauge Range (mm) 10-1000

Condition: excellent (used), Year of construction: 2001, Used High Quality, Very Clean and Fully Serviced Large Format Amada Vipros King 368 Cnc Punch Press For Sale Complete With 1600 Throat To Process 3metre x 1.5metre Sheet Metal year 2001 price POA specification 30 TONS CAPACITY 58 STATION 4 AUTO-INDEX HYDRAULIC CNC PUNCH PRESS COMPLETE WITH LKI MP3000 LOAD -UNLOAD MANILPULATOR description CAPACITY 30 TONS TYPE BRIDGE FRAME SERVO CONTROLLED HYDRAULIC RAM BRIDGE FRAME SERVO CONTROLLED HYDRAULIC RAM CONTROL FANUC 18P MAX AXIS TRAVEL 1525 X 2000 MAX SHEET SIZE 1525 X 4000 MAX SHEET THICKNESS 3.2MM 58 STATIONS THICK (H) 24 x 12.7 mm 24 x 31.7 mm 4 x 50.8 mm 1 x 88.9 mm AUTO-INDEX STATIONS 2 X 31.7mm 2 X 114.9mm MAX SHEET WEIGHT 150 KG 120 KG AT MAX SPEED MAX HIT RATE 860 STROKES PER/MIN Dedpjr D R Rusfx Ac Hoci POWER AND AIR REQUIRED 30 KVA 400V +/- 10%50 Hz AIR 5.0 kgf/cm/2 AIR FLOW 250 L/MIN COOLING WATER FLOW Min 40 1/min WEIGHT 14000kg SERIAL NO. MAX SHEET SIZE 3000mm X 1500mm MIN SHEET SIZE 1000 MM X 300mm SHEET THICKNESS RANGE 0.5mm – 6.0mm MAX LIFT CAPACITY 170 KG WITH DOUBLE SHEET DETECTION MAX PALLET LOAD 3000KG POWERAND AIR REQUIRED 10 KVE AIR 6 BAR FLOW RATE 650L/MIN

Condition: used, Automatic High Quality Grinding Automatic High Quality Grinding Machine Type : Other All punch operators know the importance of tool maintenance on part quality and tool life. The AMADA TOGU is the solution; an automatic tool grinder design specifically for high quality grinding of sheet metal tooling. Unmanned operation Simple operator control Quick, reliable grinding of all standard tooling Supplied with jigs for shear angle grinding Restores tooling to optimum condition resulting in high quality parts Dodpfx Asfuai Uoc Hoci Enables regular regrinding to maximise tool life USED AMADA AUTOMATIC TOOL GRINDER MODEL TOGU-III MACHINE SPECIFICATIONS Model ……………. TOGU-III Max. Diameter Tool Size ……………. 6.30 Max. Grinding …………… .039” Main Axis Motor …………… 2 H.P. 2 P Main Axis Rotation Speed ………….. 3000R.P.M. (60Hz) Main Axis Travel …………… 9.45” Main Axis Feed Motor …………….. DC Servo Motor (0.05 H.P.) Main Axis Feed Speed-High ………… 23.6 I.P.M. Main Axis Feed Speed-Middle ………. 2.36 I.P.M. Main Axis Feed Speed-Low …………. 0.002 I.P.M. Table Motor ……………. 0.134 H.P. 4P Table Rotation Speed …………… 72 R.P.M. (60Hz) Cooling Water Pump Motor ………….. 0.08 H.P. 2P Cooling Water Pump Flow …………… 0.9 CFM (60 Hz) Machine Weight …………….. 1,058 lbs Power Supply …………….. AC220V 3 Phase 2.5 kVA (Transformer Used Outside 220v Area) Air Supply …………… 60 C.F.M. Grinding Wheel …………….. CBN 5.31 Benefits: Fast and Easy to Use Fully automated machine Unmanned grinding cycle Easy operation – load ᐳ inputᐳ start Programmable re-grind amount High Quality Finish Automatic feed of wheel prevents tool burn Automatic grinding wheel dress indication Excellent surface finish Safe Unique safety locking system ensures operator safety Visual operation/standby indication Coolant and Filtration System Automatic coolant application prevents tool burn High quality finish maintained by filtration of coolant liquid