Used Universal Sheet Metal Processing Machine for sale (73,751)

Condition: ready for operation (used), functionality: fully functional, Year of construction: 1985, machine/vehicle number: 8444-08, workpiece length (max.): 6,000 mm, No minimum price – guaranteed sale to the highest bidder! TECHNICAL DETAILS Maximum edge length: 6,000 mm Maximum material thickness: 1.25 mm Mechanical cutting device Hydraulic unit Flow rate of gear pump: 14.5 l/min Operating pressure: 140 bar Maximum pressure: 210 bar Nsdszy Ndcjpfx Afuedb Electric motor power: 3 kW Motor speed: 1,450 rpm Voltage: 380 V Frequency: 50 Hz Oil tank capacity: 30 l Pressure gauge diameter: 63 mm Pressure gauge display range: 0–250 bar Pressure switch: 90 bar Hydraulic components Gear pump CPL 9 DQ Intermediate flange L25-2/004 Elastic coupling G 228/2P Return filter Fill and vent filter Oil level indicator Drain plug Glycerine pressure gauge Valve block with pressure, flow control, braking, and solenoid valves Hydraulic cylinders Number of hydraulic cylinders: 8 Type: GHZ-50 × 225-S spec. Piston rod with external thread M20 Length: 20 mm Swivel bearing at the rear Hydraulic motors Number of hydraulic motors: 4 Type: OMP 50 MACHINE DETAILS Control system Electrical machine control with operator panel (OP) Adjustable dwell times, angle ranges, and shutdown delays Variant control for different machine functions EPROM-based control Electrical supply Mains voltage: 380 V Frequency: 50 Hz EQUIPMENT Hydraulic unit OP-14 SM 8 hydraulic cylinders GHZ-50 × 225-S spec. 4 hydraulic motors OMP 50 Gear pump CPL 9 DQ Valve block with hydraulic valves Return filter Fill and vent filter Oil level indicator Glycerine pressure gauge Pressure switch Electrical OP control Hydraulic and electrical circuit diagrams

Year of construction: 2026, condition: new, functionality: fully functional, # Sheet Metal Beading Machine ETB 40 – Metal Technics Polska ## Professional Sheet Metal Beading Machine The ETB 40 Sheet Metal Beading Machine is a robust and efficient machine designed for producing beads, grooves, flanges, reinforcing ribs, and other forming operations in sheet metal. Thanks to its heavy-duty construction, high precision, and a wide range of interchangeable forming rolls, it is ideal for metal fabrication workshops, HVAC duct production, sheet metal processing, and general industrial manufacturing. The machine enables fast and accurate production of repeatable profiles, improving productivity while maintaining excellent quality. ## Key Features * Maximum sheet thickness: 4 mm * Powerful 2.2 kW electric motor * Heavy-duty steel construction * 300 mm throat depth * Precise material guidance * Suitable for a wide variety of beading and flanging operations * Quick and easy roll replacement * Ideal for HVAC, tanks, enclosures, and steel fabrication * High manufacturing quality * Machine available from stock ## Technical Specifications * Model: ETB 40 * Maximum sheet thickness: 4 mm * Roller width: 165 mm * Throat depth: 300 mm * Roller speed: 15.3 rpm * Motor power: 2.2 kW * Dimensions (L × W × H): 1550 × 510 × 1180 mm * Weight: 341 kg ## Applications The ETB 40 is ideal for manufacturing: * HVAC ducts and fittings * Air-conditioning components * Cylinders and tanks * Machine enclosures * Decorative sheet metal components * Flanges, reinforcing beads and stiffening profiles * Components for the automotive and steel fabrication industries ## Heavy-Duty Construction The machine is built on a rigid welded steel frame, ensuring excellent stability, high precision, and long service life even under intensive industrial use. ## Easy Operation Njdpfxjzkubzj Afuodb The ergonomic design and intuitive controls allow fast roll changes and quick machine setup for different forming operations. This makes the ETB 40 suitable for both small workshops and high-volume production. ## Transport & Technical Support We organize machine transportation throughout Europe as well as to countries outside the European Union. Every transport quotation is prepared individually based on the delivery destination. We provide professional technical advice, warranty and after-sales service, and ongoing technical support from our specialists. Customers are also welcome to collect the machine directly from our warehouse in Sokołów Podlaski, Poland. ## Why Choose Metal Technics Polska? For many years, Metal Technics Polska has been supplying high-quality metalworking machinery to customers across Europe. We provide complete support—from technical consultation and machine selection to transportation, commissioning, and long-term after-sales service. If you would like to receive a quotation or learn more about this machine, please contact our sales team. Visit the Metal Technics Polska website to explore our complete range of sheet metal working machines and discover our latest products and promotions.

Condition: excellent (used), Year of construction: 2022, functionality: fully functional, Servo PANEL BENDER FBA 2016 CNC sheet metal bending machines are characterized by high flexibility, efficiency, precision, and a high degree of automation. They are suitable for processing housings, doors, and other components. They are widely used in industries such as kitchen appliances, switchgear cabinets, power electronics, elevators, etc. CNC control: Beckhoff Material and bending capacities Max. bending length: 2000 mm Max. diagonal of the sheet: 2400 mm Max. bending height: 165 mm Min. sheet thickness: 0.5 mm Maximum sheet thickness depending on material type Mild steel / carbon steel (410 N/mm²): 2.0 mm Stainless steel (660 N/mm²): 1.2 mm Aluminum alloy (265 N/mm²): 3.0 mm Machine and system data Number of servo axes: 12 Total power: 36 kW Machine weight: approx. 14,000 kg Dimensions (L × W × H): approx. 4.5 × 2.8 × 2.8 m This machine will be exhibited at Euroblech 2026 in Hanover and will be available from October. We have been distributing YAWEI machines throughout Europe for over 20 years. Service and spare parts supply are provided by H+S, all from a single source. Ndsdpfx Afsz Eq Tgjusb

Condition: good (used), functionality: fully functional, Year of construction: 1995, operating hours: 10,246 h, machine/vehicle number: 5022/03, working width: 3,000 mm, 1995 COLLY folding machine in working order. DELEM DA20 numerical control Nsdpfx Aju E Eyrefuodb Power 125T for 3m

Condition: new, functionality: fully functional, Year of construction: 2025, laser type: fiber laser, Equipment: CE marking, centralized greasing system, cooling unit, documentation/manual, dust extraction, emergency stop, fume extraction, nozzle changer, safety light barrier, Laser power: 3KW, 6KW, 12KW Standard hardware: waste car, fully automatic butter injection, dual-control workbench, adaptive multi-angle site placement, beam light curtain Optional hardware: fire bricks, high-pressure proportional valve (standard for 6KW and above), safety door lock, Independent laser cabinet, rear exchange table light curtain, rear lifting light barrier, Nodpfx Afjwz Ukysuedb Rear camera, internal camera, monitoring display, radiation-proof glass, upper cover fan, upper cover, partition dust removal

Condition: new, functionality: fully functional, Fiber Laser Cutting Machine for Sheet Metal – Different Sizes & Laser Powers Description Industrial CNC fiber laser cutting machine for high-speed and precise cutting of sheet metal. Suitable for general metal fabrication as well as production of HVAC components, ventilation parts, electrical cabinets, machine enclosures, brackets, roofing and facade elements and other sheet metal products. The machine can be configured individually according to the customer's required working area, material type and cutting thickness. Suitable materials: Carbon / mild steel Stainless steel Galvanized steel Aluminum Brass Copper Standard configuration example Working area: 1500 × 3000 mm Laser power: 1500 W Cutting thickness: approx. 0.5–10 mm, depending on material and cutting conditions Positioning accuracy: up to ±0.01 mm Max. idle speed: 80–110 m/min Acceleration: up to 1G Cooling: water cooling Cutting gases: oxygen / nitrogen / compressed air Power supply: 380 V, 3 Ph, 50/60 Hz File formats: DXF, PLT, AI, NC and others Other working areas and laser powers available Depending on the production task, machines can be supplied with different working areas, including: 1300 × 2500 mm Ndedsztx Epjpfx Afusb 1500 × 3000 mm 1500 × 4000 mm 1500 × 6000 mm 2000 × 6000 mm 2500 × 6000 mm 2500 × 12000 mm 2500 × 14000 mm Available laser powers include approximately: 1.5 / 2 / 3 / 6 / 8 / 12 / 20 / 30 / 60 kW, depending on machine configuration. The catalogue includes large-format systems up to 2500 × 14000 mm and laser sources up to 60 kW. Higher laser power allows processing of thicker material and/or significantly increases cutting speed on thinner sheet. The required laser power is selected according to steel grade, maximum thickness, required cutting speed and cutting gas. Available configurations Open single working table Exchange table Fully enclosed machine Large-format cutting machine Automatic loading/unloading Dust and fume extraction Automatic lubrication Different laser powers and table dimensions Applications Ideal for sheet metal processing, HVAC and ventilation production, steel fabrication, machinery manufacturing, electrical enclosures, construction components, metal furniture, roofing and facade production. The machine can be integrated with press brakes, guillotines, roll forming machines and other sheet metal processing equipment. SEO Keywords fiber laser cutting machine, CNC laser cutter, sheet metal laser cutting machine, metal laser cutter, steel laser cutting machine, fiber laser 1500W, 3000W laser cutter, 6000W fiber laser, 12000W laser cutting machine, high power fiber laser, large format laser cutting machine, sheet metal cutting machine, CNC metal cutting machine, industrial laser cutter, galvanized steel laser cutting, stainless steel laser cutter, HVAC laser cutting machine, metal fabrication equipment, 1500x3000 laser cutter, 2000x6000 laser machine, 2500x12000 laser cutter.

Condition: used, Year of construction: 2020, Timesavers Series 12 | 225 mm Deburring Machine | Year of Manufacture 2020 | 2 Disc Units We are selling a dry-running Timesavers Series 12 for processing small sheet metal parts. The machine was manufactured in 2020 and is equipped with two disc units and a feed conveyor. It is suitable for removing burrs from laser-, punched-, and waterjet-cut parts. According to the machine documentation, two flap discs with a 350 mm diameter are included in the scope of delivery. Machine Data Year of Manufacture: 2020 Working Width: 225 mm Design: Dry Operation Units: 2 Disc Units Ndjdpfx Afjz D U U Sousb Serial Number: G2561-01 The machine can be inspected by appointment. We will gladly provide further photos and information on the actual operating condition to interested parties. Price: €12,900 net, ex works Leopoldshöhe. Loading and transport are not included. If you are interested, please send us your contact details.

Condition: good (used), Year of construction: 2016, operating hours: 715 h, functionality: fully functional, machine/vehicle number: 2530-01, working width: 900 mm, Due to machine rejuvenation, we would like to sell our barely used Timesavers wet deburring machine. Ndedpfxev Tnfis Afuob The machine is available for inspection and testing; it is live. Please contact us with any questions.

Condition: like new (used), Year of construction: 2022, functionality: fully functional, Selling a well maintained batch of machines, all reccent models in great working condition. MABI 3000E EVO (2022) Nedpfx Afezbrdpsuedb MABI 4QS (2020) MABI 4H (2020) Schwartmanns BM 1 (2021) Schwartmanns RLM 1 (2021) Feel free to contact us with any questions and requests!

Condition: used, Year of construction: 2006, functionality: fully functional, machine/vehicle number: 121-C6218406, type of input current: three-phase, Finn-Power C6 — Turret Punch Press (2006) Automatic tool change High positioning accuracy Compatible with automation systems Suitable for serial production of metal parts Ndedpfjxb R Npex Afujb

Condition: as good as new (ex-display), Year of construction: 2025, functionality: fully functional, machine/vehicle number: FTR-124-1217, total length: 2,150 mm, total width: 2,205 mm, total height: 2,320 mm, overall weight: 3,750 kg, input voltage: 400 V, workpiece height (max.): 150 mm, input frequency: 50 Hz, power: 25 kW (33.99 HP), workpiece width (max.): 80 mm, workpiece length (max.): 80 mm, input current: 50 A, This Q-Fin F1200 XL VAC machine is located in the showroom in Bergeijk and has only been used for demonstrations. The machine has therefore only been used for a limited time and can still be viewed and tested in our showroom while it is running. Ndsdozzlqnopfx Afujb The F1200 XL VAC is a powerful, all-round finishing machine for deburring, rounding, and finishing sheet metal parts up to 1200 mm wide. Thanks to the combination of multiple processing stations, various operations can be performed in a single pass. The machine is equipped with a vacuum system that securely fixes the workpieces to the conveyor belt during the finishing process. The first processing station consists of a grinding unit. This removes burrs and irregularities from the product surface and prepares the workpiece for the next operations. Subsequently, the sharp edges of the product are processed by oscillating cup brushes. The brushes process the contours and recesses of the workpiece from different directions, ensuring that the edges are rounded evenly. Depending on the brushes used, the machine can also be used for removing oxide scale and reducing surface roughness. The XL version has an additional second grinding unit. This allows an additional finishing operation to be performed after deburring and rounding. All processing stations can be easily controlled via the HMI touchscreen. Various settings can be saved in programs, so recurring products can be quickly reset, achieving high reproducibility. The automatically adjustable stations also reduce manual settings and minimize the risk of setting errors by the operator. The F1200 XL VAC is suitable for processing, among other materials, stainless steel, aluminum, and steel, and combines deburring, edge rounding, and finishing in one machine. In addition, the F1200 offers the possibility of integration with ERP and handling solutions, so that the machine can also be incorporated into a further automated production process.

Condition: good (used), Year of construction: 2019, operating hours: 5,800 h, functionality: fully functional, Timesavers 42 Series WRBW (Belt Sander / Rotary Brushes / Belt Sander) Njdpfx Ajz A Ucmefujdb Year of manufacture: 2019 Only 5,800 operating hours! Includes an ATEX exhaust system from Ulmatec. Inspection is also possible.

Condition: used, Year of construction: 2005, total length: 3,940 mm, total width: 1,980 mm, total height: 2,010 mm, Empty weight: 7.000 kg Working width: 950mm Njdpsxwnbuofx Afuodb Working height: 0,5-120mm - Year: 2005 - Documentation available: No - CE marking present: Yes - CE certificate present: No - Serial number: - Drive system: CNC - Number of stations [pcs]: 3 - └ Station type 1: Abrasive belt - └ Station type 2: Rotary brush - └ Station type 3: Rotary brush - Power [kW]: 39 - Min. sheet thickness [mm]: 0.5 - Max. sheet thickness [mm]: 120 - Max. working width [mm]: 950 - Transport dimensions: 3940mm x 1980mm x 2010mm (l x w x h) - Transport weight [kg]: 7000kg - Transport packages [pcs.]: 4 Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum

Condition: ready for operation (used), Year of construction: 2010, functionality: fully functional, machine/vehicle number: 630056, overall weight: 5,200 kg, input current: 95 A, ERNST Neptun EBB 1500 is a deburring machine designed for sheet metal processing, used for cleaning and rounding the edges of parts cut by laser, punching, or flame cutting. This machine enables alternating processing of various materials such as steel sheets, aluminum, galvanized steel, or materials with protective film, thanks to its flexible deburring roller and brush set. Key features of the ERNST Neptun EBB 1500: • Versatility: Processes parts made from different materials without the need for constant abrasive changes. • Functionality: Njdpfxexmhxxo Afusdb Uses a flexible deburring roller and a set of brushes (steel or flap brushes) for deburring or edge rounding. • Precision: Allows for the achievement of an identical and uniform radius on all edges. • Ideal solution for: Companies working with diverse materials where edge processing after cutting is required.

Condition: good (used), TERMOZ LYON Nsdom Dtncspfx Afujdb tour à repousse

Condition: good (used), Year of construction: 1990, machine/vehicle number: V 254629, Offer 25311 Technical Data: - Cutting length: 250 mm - Cutting angle: 90° - Cutting capacity: - Mild steel up to 4 mm - Stainless steel up to 3 mm - Aluminium up to 5 mm Ndsdsxqzirspfx Afusb - Stroke rate: up to approx. 55 / min - Table size: W 800 x D 800 mm - Working height: approx. 940 mm - Stops infinitely adjustable in length and angle - Drive: 400 V / 4 kW - Oil filling: 50 l - Electric foot pedal - Required space: approx. W 1300 x H 1250 x D 1300 mm - Weight: approx. 800 kg - Mobile base frame

Condition: good (used), Year of construction: 2003, operating hours: 25,000 h, functionality: fully functional, type of input current: three-phase, overall weight: 13,000 kg, FOR SALE: Finn-Power F5 S Turret Punch Press Available for purchase is a high-quality, Finnish-made Finn-Power F5 S turret punch press. Manufactured by the renowned Lillbacka Corporation, this machine offers robust performance and precision for demanding sheet metal fabrication. Technical Specifications: Machine Type: Finn-Power F5 S Manufacturer: Lillbacka Corporation, Finland Manufacturing Year: 2003 Punching Force: 300 kN Max. Working Pressure: 300 bar Machine Weight: 13,500 kg Key Features: Ndsdpfx Afsy Iwmwjueb CE Certified: Fully compliant with European safety and quality standards. Heavy-Duty Build: The 13.5-ton machine weight ensures excellent stability and vibration damping for high-precision work. Proven Reliability: Built with industry-leading technology and patented Finnish engineering.

Condition: used, functionality: fully functional, Year of construction: 2023, operating hours: 3,358 h, machine/vehicle number: K22268, control type: CNC control, degree of automation: automatic, actuation type: hydraulic, controller manufacturer: JORNS, working width: 6,410 mm, folding beam adjustment: 200 mm, sheet thickness (max.): 2 mm, sheet thickness steel (max.): 2 mm, sheet thickness aluminum (max.): 2 mm, back gauge adjustment: CNC-controlled, back gauge: 1,250 mm, back gauge speed R-axis: 283 mm/s, back gauge travel distance R-axis: 1,250 mm, back gauge travel distance Z-axis: 1,250 mm, overall weight: 13,000 kg, total length: 8,500 mm, total width: 3,354 mm, total height: 1,938 mm, input voltage: 400 V, input current: 80 A, input frequency: 50 Hz, type of input current: three-phase, Equipment: CE marking, emergency stop, foot remote control, We offer this used Jorns JDB-150G-DP-1250-JC100-6.4-dsp panel bending machine for sheet metal, manufactured in 2023. Year of manufacture: 2023 Ndsdpfx Aez Dillefueb Model: JDB-150G-DP-1250-JC100-6.4-dsp Rated current: 80 A Operating voltage: 3 × 400 V Frequency: 50 Hz Control voltage: 24 VDC Maximum hydraulic pressure: 210 bar Maximum pneumatic pressure: bar If you have any questions or need further information, please do not hesitate to send us a message or call us.

Condition: good (used), Year of construction: 2011, Edging and contouring - deburring machine ROLEI Type: 00645-KKE2 Year: 2011. Nodpfswnpflex Afusdb

Condition: excellent (used), Year of construction: 2007, functionality: fully functional, Euro Fintec 410 is a deburring machine which has a 1 inch belt. The belt assembly can be easily adjusted to accommodate complex deburring operations. It comes complete with a dust collection bag to ensure safe operation It is in excellent condition and comes complete with a number of deburring belts. Ndodpfszmafqox Afusb

Condition: used, Year of construction: 2003, total width: 2,700 mm, total height: 2,900 mm, total length: 1,700 mm, Colour: White Empty weight: 3.000 kg - Year: 2003 - Documentation available: No - CE marking present: Yes - CE certificate present: No - Serial number: 0312101 - Drive system: Conventional - Wet/dry: Dry - Number of stations [pcs]: 1 - └ Station type 1: Abrasive belt - Power [kW]: 32 - Max. working width [mm]: 550 - Transport dimensions: 1700mm x 2700mm x 2900mm (l x w x h) - Transport weight [kg]: 3000kg - Transport packages [pcs.]: 2 Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Ndodozkkd Sjpfx Afuob Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum

Condition: used, Coil line – Uncoiler and Leveler Year of construction: 1991 Coil width: 50 to 450 mm Sheet thickness with inactive leveler: 6 mm Sheet thickness with active leveler: 2 mm - Very good condition and comprehensive operating instructions Space requirement of the entire system L x W: approx. 7000 x 3000 mm Weight of the entire system: approx. 11 tons Good condition Leveler HMS Type RS 47-04/1, Machine No. Coil width, nominal width: 400 mm Coil width, maximum passage width: max. 455 mm Coil thickness at 400 mm width: max. 1.5 mm (for steel) Coil thickness at 400 mm width: max. 2 mm (for copper) Speed: max. 40 m/min Number of leveling rolls: 7 pieces Leveling roll diameter: Ø 40 mm Ndsdpfx Afeif Sg Soueb Number of tension rolls: 2 pieces Tension roll diameter: Ø 80 mm Infeed height, passage height: 1500 mm - Leveling rolls hardened, ground, and hard chrome-plated, with central support - Tension rolls hardened, ground, and hard chrome-plated, with hydraulic gap adjustment - Manual adjustment of the leveling rolls - Infeed guide with hydraulically extendable tongue and hydraulically adjustable idler roller - Adjustable lateral coil guide - All leveling rolls driven via distributor gearboxes with universal joints - Both tension rolls driven via gearboxes with universal joints - Frequency-controlled drive via geared motors - Leveler opening stroke 250 mm for cleaning the system or for processing thicker material, stroke movement via trapezoidal spindle - Ultrasonic loop control Transport dimensions L x W x H: 3600 x 2200 x 2200 mm Weight: approx. 4 tons Uncoiler HMS Type BA 1.5-06/80, Machine No. Coil weight: max. 8000 kg Coil outer diameter: max. 1600 mm (with loading table) Coil outer diameter: max. 2000 mm (without loading table) Diameter of the coil inlet disc: Ø 1700 mm Coil inner diameter, spreading range: 460-520 mm Coil width, nominal width: max. 630 mm Width of the spreading jaws: 750 mm Height of the uncoiler arbor above the base plate: 1500 mm - Drive of the uncoiler arbor via hydraulic motor and gear - Pneumatic retarder brake on the uncoiler arbor TWINFLEX - Hydraulic spreading of the uncoiler arbor, centrally via wedge slide system - Hydraulic pressure arm with hydraulically driven double rocker roller - Coil loading table with 12 tons lifting capacity and 300 mm stroke - Uncoiler in an above-floor running frame with motorized transverse travel drive Transport dimensions L x W x H: 3500 x 1900 x 2500 mm Weight: approx. 5 tons Central hydraulic unit, separate Tank capacity: 350 liters Drive power: 18.5 kW - Drive motor with 2 pumps REXROTH (tandem pump) - Oil cooler as an air heat exchanger with fan motor Transport dimensions L x W x H: 1600 x 850 x 1450 mm Weight: approx. 800 kg Electrical cabinet, separate - All cable connections are made via Harting connectors Transport dimensions L x W x H: 2800 x 500 x 2250 mm Weight: approx. 800 kg

Condition: new, material width 1015 mm material thickness 1 mm speed von Hand Nsdsupxdkspfx Afuedb weight 240 Kg dimensions 1420 x 600 x 750 m

Condition: new, Year of construction: 2026, functionality: fully functional, working width: 1,100 mm, type of input current: three-phase, sheet thickness (max.): 50 mm, sheet thickness steel (max.): 50 mm, sheet thickness aluminum (max.): 50 mm, sheet thickness copper (max.): 50 mm, sheet thickness brass (max.): 50 mm, total length: 2,000 mm, total width: 2,590 mm, total height: 2,150 mm, overall weight: 2,500 kg, input voltage: 400 V, warranty duration: 12 months, table width: 1,100 mm, workpiece height (max.): 50 mm, power: 13 kW (17.68 HP), workpiece width (max.): 1,100 mm, pass-through width: 1,100 mm, DM1100 2C Working capacity (mm): 1100×50 Number of cross-belt stations: 2 Cross-belt speed (m/s): 2-8 Feed speed (m/s): 0.6-3.2 Cross-belt motor (kW): (4x) 3 Feed motor (kW): (3x) 0.18 Total power (kW): 13 Current consumption (A): 30 Dust extraction port per head (Ø mm): 220 Dimensions (mm): 2000X2590x2150 Ndodpfx Afsyiyhljusb Weight (kg): 2470

Condition: used, Sheet metal cleaning machine AWS Reini R60L Automatic feed system For sheet metal dimensions 98 x 58 cm Suitable for 2, 3, and 4-sided sheet metal Dry cleaning Ndjdpfsz A Snyjx Afuob Dimensions (L x W x H): approx. 80 x 60 x 105 cm High performance, up to 200 sheets per hour Easy operation, maintenance, and servicing Mobile on rollers (with locking function)