How to maintain and upkeep second-hand punching machines?
Mainly maintain and upkeep second-hand punching machines from the following aspects:
1. Maintenance of mechanical components
Body and Workbench
-Regularly clean the surface of the machine body and workbench to remove impurities such as dust, oil, and metal shavings. Clean cloths and appropriate cleaning agents can be used for wiping. Keeping the body and workbench clean helps prevent impurities from entering the interior of mechanical components, reducing wear and corrosion.
-Check if the connection between the body and the workbench is loose. Regularly use tools such as wrenches to check and tighten bolts and nuts to ensure a secure connection. Loose connections may cause vibration and displacement of the punch during operation, affecting stamping accuracy.
Sliding block and guide rail
-The slider and guide rail are key moving parts of the punch press and require special maintenance. Regularly apply an appropriate amount of lubricating oil on the surface of the guide rail, and it is recommended to use high-quality guide rail lubricating oil. Lubricating oil can reduce friction between the slider and the guide rail, reduce wear, and also have a certain rust prevention effect.
-Check if the gap between the slider and the guide rail is normal. If the gap is too large, it will affect the motion accuracy and stability of the slider. Tools such as feeler gauges can be used for measurement, and the gap should generally be controlled within the specified range, such as less than 0.1mm. If the gap is too large, it is necessary to adjust or replace worn parts in a timely manner.
Crankshaft and connecting rod
-The crankshaft and connecting rod are important components for transmitting power. Regularly inspect the wear of the crankshaft and connecting rod, and observe whether there are scratches, wear marks, or fatigue cracks on the surface. Testing can be carried out using equipment such as flaw detectors. For slightly worn parts, grinding repair can be carried out; If there is severe wear or cracking, the components should be replaced in a timely manner.
-Keep the lubricating oil in the crankcase clean and sufficient. According to the equipment manual, regularly replace the lubricating oil, usually every 3-6 months. Clean lubricating oil can effectively lubricate the bearings and other parts of the crankshaft and connecting rod, reducing wear and heat generation.
2. Electrical system maintenance
Motor and control cabinet
-Regularly clean the dust on the surface of the motor and control cabinet. Dust accumulation may cause poor heat dissipation of electrical components, leading to malfunctions. You can use a hair dryer or soft bristled brush for cleaning.
-Check if the wiring of the motor is secure and if there are any signs of looseness, burning, or damage. At the same time, check the insulation performance of the motor and use an insulation resistance meter to measure the insulation resistance of the motor winding, which should generally not be lower than 0.5M Ω. For the control cabinet, check the working status of internal electrical components such as relays, contactors, and circuit breakers to ensure that they are properly connected and disconnected.
Sensors and buttons
-The sensors of the punch press, such as limit sensors, pressure sensors, etc., are crucial for the safety and normal operation of the equipment. Regularly check the functionality of the sensor to ensure that it can accurately detect signals. You can use tools such as a multimeter to check if the output signal of the sensor is normal.
-Check the flexibility and reliability of operation buttons (such as start, stop, emergency stop buttons, etc.). The button should be able to be pressed and popped up normally, with good contact. If the button is found to be stuck or has poor contact, it should be replaced in a timely manner.
3. Maintenance of lubrication system
Lubrication method and oil quality selection
-Understand the lubrication methods of punching machines, commonly including manual lubrication and automatic lubrication. For manually lubricated punching machines, it is necessary to strictly follow the specified time and location for lubrication, and use appropriate lubricating oil. For automatic lubrication systems, regularly check whether components such as oil pumps, oil pipes, and oil nozzles are working properly.
-Choose the appropriate lubricating oil according to the working environment and requirements of the punch press. Generally speaking, lubricating oil with good wear resistance, oxidation resistance, and rust prevention properties should be selected. Punching machines working in high-temperature environments can choose high-temperature resistant lubricating oil; Choose lubricating oil with anti-corrosion properties in environments with corrosion risks.
Lubrication cycle and oil level inspection
-Determine a reasonable lubrication cycle. In general, a small amount of lubrication should be applied to key parts (such as slider guide rails, crankshaft bearings, etc.) before starting up each day; Comprehensive lubrication should be carried out once a week or every two weeks, and the specific cycle can be adjusted appropriately according to the frequency and intensity of equipment use.
-Regularly check the oil level of the lubricating oil tank to ensure that the oil level is within the specified range. Insufficient oil can lead to poor lubrication and accelerate component wear; Excessive oil volume may cause leaks and waste. The oil level can be checked through an oil level gauge or observation hole.
4. Mold installation and maintenance
Mold Installation Specification
-Before installing the mold, ensure that the punch slide is at the top dead center position and clean the installation table of the mold and punch. According to the installation instructions of the mold, correctly install the mold on the punch worktable and fix it with appropriate bolts and locating pins. During the installation process, attention should be paid to the direction and position of the mold to ensure that it matches the punching action of the punch press.
-Adjust the closing height of the mold to match the stroke of the punch press. Usually achieved by adjusting the height of the slider, which can be fine tuned using tools such as adjusting screws. Inappropriate closure height can lead to mold damage or substandard quality of stamped parts.
Mold maintenance and replacement
-Regularly inspect the wear of the mold, including the cutting edge, cavity, and other parts. For worn cutting edges, they can be repaired through grinding; If the mold cavity is severely deformed or damaged, the mold should be replaced in a timely manner. After stamping a certain number of workpieces (such as every 1000-5000 pieces, depending on the situation of the mold and workpiece), clean and maintain the mold to remove metal shavings and oil stains on the surface of the mold.
5. Maintenance of safety devices
Protective fence and light curtain
-Check the integrity and firmness of the protective fence. The railing of the protective fence should be free of deformation or breakage, and the connection parts should be firm and reliable. Regularly clean the surface of the protective fence, remove oil and dust, and maintain clear visibility. For the light curtain safety device, check whether the light emitting and receiving components of the light curtain are working properly, and whether there is any obstruction or damage. It is possible to test whether the punch can immediately stop running by blocking the light curtain to ensure the sensitivity and reliability of the light curtain.
Emergency stop button
-Regularly check the function of the emergency stop button. Press the emergency stop button and check if the punch can quickly stop running, and if the control system of the punch can reset normally after the button is pressed. Ensure that the position of the emergency stop button is easily accessible to operators in emergency situations, and there are no obstacles around it.
More Articles
-
Boring Machine Applications in Construction Equipment RepairWhen a pin joint develops play, replacing the pin alone may not solve the problem. Wear can leave the housing bore oval, tapered or out of alignment. A boring machine for construction equipment repair restores the bore so the joint can be fitted with a correctly sized pin or bush. This work is often performed on the machine in the field when removing a large component would add substantial downtime. Where bore wear occurs on construction equipment Repeated articulation, impact loading, inadequate lubrication and contamination can wear the bores that support pins and bushes. The repair target is the damaged joint bore, not simply the visible pin. Before machining, the technician needs to identify the joint layout, access, material condition and the relationship between connected bores. Equipment Typical bore Repair purpose Excavator Boom, arm and bucket pin bores Restore pin fit and joint alignment Loader Lift-arm and bucket pivot bores Correct wear at heavily cycled pivots Backhoe Dipstick, boom and stabilizer pin bores Re-establish fit across linkage joints Crane Boom and linkage pivot bores Address wear at structural articulation points Hydraulic equipment Cylinder-end and mounting pin bores Restore the connection between cylinder and structure How boring repair addresses the damage Construction equipment boring repair typically starts with inspection and measurement. The repair team checks bore diameter, roundness, wear pattern and alignment with related bores. If the housing is suitable for repair, a portable line boring setup machines the damaged bore to a controlled, consistent diameter. Depending on the repair plan, the bore may then receive a bush, or be finished to suit the specified pin or bearing arrangement. Where two or more bores form one pivot line, their alignment matters as much as the individual diameters. Machining them in a common setup can help restore the intended axis. The required dimensions and fit should come from the equipment specification or an agreed repair drawing; they should not be assumed from the pin size alone. Field conditions shape the repair plan Access, nearby structures, available setup space and the condition of the surrounding material affect whether on-site boring is practical. Cracks, severe distortion, damaged welds or a bore near a highly loaded structural area may require additional inspection or a different repair sequence. The machine must also be isolated and securely supported before work begins, following site and equipment safety procedures. For a field assessment, document the machine and joint location, report the symptoms, and provide measurements or photographs where available. Confirm whether connected bores need to be machined on the same axis, whether a bush will be installed, and what final fit is required. These details help establish a realistic repair scope before equipment is mobilized. Frequently asked questions Which excavator parts commonly need bore repair? Boom, arm and bucket pin joints are common locations, as are other pivot connections showing looseness or uneven wear. Inspection determines whether the bore, pin, bush or several parts need attention. Can loader pivot bores be repaired on site? Often, but feasibility depends on access, setup conditions, damage severity and the required machining sequence. A site assessment can establish whether portable boring is appropriate. Does every worn bore need a new bush? No. The repair method depends on the equipment design, bore condition and specified fit. Confirm the intended finished dimensions and component arrangement before machining.
-
Boring Machine Cost Guide: What Affects the Price of Industrial Equipment?Two boring machines intended for similar repair work canreceive very different quotations because the price reflects more than the machine’s basic size. Machine type, working range, drive power, accuracy requirements, tooling and included automation all affect the final configuration. To compare a boring machine price accurately, compare the scope of supply and the job requirements, not just the headline figure. What drives the quotation? Price factor Why it affects cost Details to specify Machine type and setup Portable systems and larger stationary equipment have different structures and intended applications. Equipment type, work location and setup constraints Bore size and machining range Required diameter, bar length and travel determine the working envelope and compatible components. Minimum and maximum bore diameter, machining length and access Power and duty Drive requirements depend on the material, cutting conditions and expected workload. Workpiece material, typical jobs and operating frequency Accuracy and tooling Accuracy requirements and the tooling package influence component selection and what must be supplied. Required results, cutters, mounts and other tooling needs Automation and customization Controls, optional functions and non-standard configurations add scope to the build. Required automation, special interfaces and quantity Configuration matters more than a bare price A lower-priced machine may have a narrower machining range, fewer included tools or less automation. A higher quotation may include a broader configuration or options that are unnecessary for a particular job. Neither price alone establishes suitability. For a portable boring machine price comparison, check that the quoted setup can reach the bore, fit the available work area and perform the required operation. Accuracy should also be described in terms of the work to be done. Share the required result and relevant workpiece details so the supplier can quote a configuration against the application. Avoid comparing quotations that assume different tooling, accessories, automation or customization. Prepare information for a useful quote For a meaningful boring machine cost estimate, provide the bore diameter range, machining length, material, workpiece or equipment details, site access constraints and expected operating frequency. List required tooling, accuracy expectations, automation and any special mounting or interface requirements. Include the purchase quantity and identify which accessories should be included. Ask suppliers to show the proposed configuration and included items in the quotation. This makes differences easier to trace and helps prevent a low initial figure from omitting components needed for the intended work. Submit the same job information to each supplier when comparing offers. Frequently asked questions Why is one boring machine much cheaper than another? The machines may differ in type, working range, power, included tooling, accuracy-related configuration, automation or customization. Compare the quoted scope against the same application before judging the difference. What information is needed to quote a boring machine? Provide the required bore diameters and machining length, material, workpiece and site constraints, expected use, accuracy needs, tooling and automation requirements, customization details and order quantity. These details help suppliers quote a configuration suited to the job.
-
Used Automatic Lathe Machine for Sale WorldwideUsed automatic lathe machines provide a practical route to high-volume turning capacity without the lead time and capital cost of new equipment. For worldwide buyers, condition verification and supplier capability determine whether a low purchase price becomes a reliable production asset. Used Automatic Lathe Machine for Sale Worldwide What Buyers Should Assess A well-maintained cam-operated or CNC automatic lathe can retain stable repeatability for years when spindle bearings, guideways, collets, lubrication, and control components are within specification. Typical remaining service life is 5-12 years for a properly rebuilt machine, but heavily worn feed systems, obsolete controls, and unavailable parts create material selection risk. Machine type Typical work Used price range Main risk Cam automatic lathe Small pins, screws, fittings US$3,000-15,000 Cam and clutch wear Single-spindle CNC lathe Precision shafts, bushings US$8,000-35,000 Control and servo age Swiss-type CNC lathe Medical and electronics parts US$18,000-80,000 Guide bushing accuracy Inspection Before Shipment Checkpoint Acceptance focus Spindle Measure runout, noise, heat, and speed stability Axes and slides Check backlash, repeatability, way damage, and lubrication Tooling system Confirm collet, turret, feeder, and change-part availability Trial cutting Verify diameter, surface finish, cycle time, and scrap rate Electrical system Test alarms, drives, safety devices, and documentation Request a cold-start video, spindle runout report, sample-part test, machine serial number, and packing photographs. Accuracy claims should be supported by measured results, not appearance or repainting. China Supplier Value Established China-based suppliers combine broad used-machine sourcing with competitive refurbishment costs and export packing experience. Prefer suppliers able to provide inspection records, relevant quality certification, export documents, remote commissioning support, and stocked wear parts such as collets, belts, seals, sensors, relays, and hydraulic components. Cost item Direct as-is purchase Inspected Chinese supplier Initial price Lower Moderate Condition evidence Often limited Test data and video Export support Buyer-managed Crating and documentation After-sales response Uncertain Parts and technical support FAQ Can a used automatic lathe hold tight tolerances? Yes, after measured verification, alignment, and trial cutting; condition matters more than machine age. What accuracy should be checked? Check spindle runout, axis backlash, repeat positioning, workpiece diameter variation, and surface finish. Are old controls a concern? Yes. Confirm backup availability, drive condition, electrical drawings, and an upgrade path before purchase. Should buyers choose rebuilt equipment? Choose rebuilding when it includes documented replacement of wear components and a witnessed test, not cosmetic painting alone. Which spare parts should be ordered initially? Order consumable seals, belts, collets, sensors, contactors, filters, and model-specific tooling where available. Can a Chinese supplier arrange worldwide delivery? Experienced exporters can arrange seaworthy packing, shipping documents, and remote installation guidance. Choose a reliable Chinese supplier that can prove machine condition, support export delivery, and quote the right configuration for your current parts. Request a current quotation with inspection data before ordering.
-
Can you ship used machinery to my country and handle import formalities?Many international business owners, factory operators, and construction contractors ask the same question when sourcing second-hand equipment: Can you ship used machinery to my country and handle full import formalities? If you are looking for reliable one-stop used machinery export and import clearance services, the answer is absolutely yes. Professional used machinery exporters offer global shipping and full import document processing to save you time, cost, and cross-border trade risks. Global Shipping Service for All Types of Used Machinery We support worldwide shipping for all categories of used machinery, including construction machinery, industrial processing equipment, agricultural machines, and mechanical tools. No matter your destination country in Asia, Africa, Europe, North America, or South America, we can arrange safe, fast, and cost-effective shipping solutions. We provide flexible logistics options including sea freight, air freight, and container shipping. All used machines will be professionally cleaned, inspected, packaged, and fixed inside containers to avoid damage during long-distance transportation. We also offer cargo tracking until the goods safely arrive at your local port. Full-Service Import Formality Handling Most overseas buyers lack experience with complex cross-border import procedures for used machinery, which has stricter customs rules than new equipment. Our team can fully handle all import and export formalities on your behalf. We complete official export customs declaration, prepare commercial invoices, packing lists, certificates of origin, and official inspection documents required by international customs. Our staff is familiar with different countries’ import policies for used machinery, including restriction standards, quarantine rules, and tax declaration requirements. We assist with every step, from export filing at the origin port to import guidance at your destination port. We can sort out compliance documents, submit customs applications, and solve common clearance problems that often cause delays or fines. Why Let Professionals Handle Your Import Formalities Used machinery import involves strict policy audits. Missing documents, incorrect declaration information, or non-compliant filing will lead to customs detention, port storage fees, cargo return, or expensive penalties. By choosing our one-stop service, you can avoid complicated paperwork and tedious communication with customs authorities. You do not need to learn professional trade knowledge or prepare complex files by yourself. We ensure all formalities comply with local import laws, making customs clearance fast and smooth. What Benefits You Get from Our All-in-One Service First, you save huge time costs. We take charge of the entire shipping and clearance process, allowing you to focus on your factory production and project progress. Second, you reduce trade risks effectively. Our standardized document processing avoids clearance failures and legal risks. Third, you enjoy transparent pricing with no hidden charges. We provide detailed cost lists for machinery inspection, customs declaration, logistics, and service fees before shipment. Finally, we offer after-arrival guidance to help you pick up cargo quickly. Final Conclusion In summary, we can ship qualified used machinery to almost every country globally and provide full support for import formalities. Our integrated shipping and customs clearance service makes international used machinery procurement simple, safe, and efficient. If you plan to import second-hand equipment, choose our professional service for a worry-free cross-border transaction.
