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Dalian THK linear guide rail SRG series, large spot inventory.

The SRG series of THK linear guide slides is characterized by its roller design. Roller-type guide slides have a larger contact area with the guide rail compared to ball-type slides due to line contact, resulting in a stronger load carrying capacity. Details are as follows: Model Classification - By size: SRG15 series, SRG20 series, SRG25 series, SRG30 series, SRG35 series, SRG45 series, SRG55 series, SRG65 series, SRG85 series, SRG100 series, etc. - By structural features: Standard types such as SRG-C type; extended types such as SRG-LC type and SRG-SLC type; narrow types such as SRG-R type; narrow extended types such as SRG-LR type and SRG-SLR type; top-mounted types such as SRG-A type and extended LA type, etc. Product Features - High rigidity: Uses high-rigidity rollers, with the roller length being more than 1.5 times the roller diameter. Compared to ball-type guides, the contact area between the roller and the guide rail is larger, allowing it to withstand higher loads. - Four-directional equal load: The roller columns are arranged at a contact angle of 45°, giving the LM slide the same rated load in the radial, anti-radial, and lateral directions. It has high rigidity in all directions and can resist forces from different directions. - Smooth movement: The roller retainer ensures uniform spacing and circulation of the rollers, preventing roller offset when the slide reaches the load zone, minimizing fluctuations in rolling resistance. - Long-term maintenance-free: The roller retainer eliminates friction between rollers and improves grease retention, reducing maintenance costs and downtime. - Standard size design: The size design is based on the all-steel ball LM rolling guide HSR type, offering interchangeability and universality, facilitating system design and component replacement. - Abundant accessories: End seals, internal seals, side seals, multi-layer contact scrapers LaCS, dust covers, side scrapers, GC hole covers, etc., are available. Application Scenarios Due to its high rigidity and four-directional equal load characteristics, it is suitable for large-scale machinery or heavy industrial applications with high load capacity requirements, such as large machine tools, heavy processing equipment, industrial robots, etc. It can also be used in automated production lines and precision measurement equipment that require high motion accuracy and smoothness.

2025

Introduction to THK linear guideway false rails

A false rail for a slide is an attachment used for linear guides, usually made of plastic or metal. It is matched to the size of the slide. The following figure shows two types of false rails. The black one is commonly used with THK linear guide slides, and the green one is used with HIWIN linear guide slides. The color matching is based on the brand's own usage. So what is the function of a false rail? Let's introduce it below. Easy Installation: When installing the slide onto the guide rail, the false rail acts as a guide to prevent the slide from deviating from the track during installation, ensuring accurate and smooth installation. As can be seen from the following figure, when installing the slide, do not remove the false rail. Instead, push the slide along the guide rail, and the false rail will slowly come out, playing a guiding and protective role at the same time. Protection of Balls: The false rail prevents the balls from falling or being damaged due to vibration or collision during transportation or storage, protecting the integrity and performance of the balls. Improved Stability: The false rail increases the contact area between the slide and the guide rail, improving the stability and load-bearing capacity of the slide, and reducing shaking and vibration during movement. Reduced Friction: The false rail forms a protective layer between the slide and the guide rail, reducing friction and wear between the slide and the guide rail, improving the service life and performance of the slide. Easy Maintenance: The false rail facilitates maintenance and upkeep of the slide, such as cleaning and lubrication, extending the service life and performance of the slide.

2025

THK Linear Guideway Professional Terminology Introduction

Linear guides are used in many industries. Today, we will introduce some keywords about guides, taking THK guides as an example. 1. What does the accuracy of THK guides refer to? Guide accuracy refers to the precision of the motion trajectory of the moving guide along the supporting guide, specifically manifested as the linearity of the linear motion guide and the roundness of the circular motion guide. (Whether the linear motion is straight, and whether the circular motion is round) 2. What is guide preload? Guide preload refers to applying a certain force to the bearings or sliders during guide installation to generate pre-pressure between them and the guide. Appropriate preload can eliminate the clearance between the rolling elements and the guide, reduce deformation when the guide bears a load, provide more stable support for high-precision processing or equipment that bears relatively large cutting forces, and reduce processing errors. Reasonable preload can make the contact between the rolling elements and the guide more uniform, reducing local wear. However, excessive preload will increase friction and heat generation, which may reduce the service life. It can reduce the jumping and vibration of the rolling elements, making the slider move more smoothly on the guide. For high-speed motion or frequent starts and stops, the effect of improving motion accuracy is more significant. Preload is also classified into levels, such as light preload and medium preload, which can be selected according to the needs of your equipment.

2025

Introduction to Kate HTPM rolling linear guide

Linear rolling guides, as a rolling linear guidance component, utilize rolling elements that continuously circulate between the slider and the guide rail. This allows the worktable to easily move linearly with high precision along the rail. They possess excellent characteristics such as high load capacity, high precision, high speed, low wear, and reliability, making them an indispensable functional component in various machine tools and precision electronic machinery. Performance Characteristics - High Precision: Low coefficient of friction, small difference between static and dynamic frictional resistance, less prone to creeping at low speeds, and high repeat positioning accuracy. - Low Wear: Rolling contact friction consumes less energy, reducing frictional wear on the rolling surface, allowing for long-term high-precision operation. - High Speed: Enables high-speed movement of machine tools, increasing machine tool efficiency by 20-30%. - High Load Capacity: Can withstand forces and moments from different directions, exhibiting good load adaptability. - Easy Assembly: Interchangeable; the machine tool can regain high precision simply by replacing the slider, guide rail, or the entire rolling guide assembly. Application Areas - CNC Machine Tools: Ensures stability and precision during processing, improving processing quality. - Automated Production Lines: Used in material handling, assembly positioning, and other processes, ensuring continuous and efficient operation of the production line. - Precision Measuring Instruments: Effectively reduces measurement errors and improves measurement accuracy. - Aerospace Field: Ensures product quality and performance in the manufacturing of aircraft, rockets, and other aerospace components. The following table compares the basic performance of the three main types of guide rails currently used domestically and internationally.

2025

Introduction to THK ball screws

When discussing lead screws, we can consider aspects from the brand (THK, HTPM), whether imported or domestic, to the specific model, size, and application. But what exactly defines a lead screw? Let's explore: Lead screws are transmission components that convert rotary motion into linear motion, or vice versa. Components of a Lead Screw: Screw: A slender shaft with helical grooves, forming the main part of the lead screw. Nut: Mates with the screw, containing corresponding helical grooves, allowing axial movement along the screw. Ball Bearings (in some lead screws): Located between the screw and nut, these reduce friction through rolling, improving transmission efficiency and precision. Other Components: Such as reverse mechanisms, dust covers, and lubrication systems, which ensure proper operation and longevity. Working Principle: A motor drives the lead screw to rotate. The nut on the screw shaft, driven by the rotating threads, achieves linear reciprocating motion, converting the motor's rotational torque into the linear driving force needed for equipment movement. Applications: Machine Tools: Used for workpiece feed, tool movement, etc. Automated Equipment: Such as robots and automated production lines, for precise positioning control. Aerospace: Used in aircraft attitude control, engine adjustment, etc. Automotive: Used in automotive steering systems, suspension systems, etc. Medical Devices: Such as CT scanners and MRI machines, for precise scanning and positioning.

2025

What are the differences between ball screws and ball splines?

Ball screws and splines are two common mechanical transmission components. They have some differences in structure, function, and application scenarios. Currently, there are many brands of ball screws and splines on the market, including THK, HIWIN, HTPM, and many other domestic brands. Therefore, it is necessary to confirm the relevant dimensions when selecting them. The following are their main differences: - Structural characteristics: A ball screw consists of a screw, nut, and rolling elements. The rolling elements roll between the screw and nut, achieving high-precision linear motion transmission; a spline consists of an internal spline and an external spline. Both the internal and external splines are multi-tooth parts that transmit torque and motion through the mutual engagement of the teeth. - Working principle: A ball screw converts rotary motion into linear motion, or linear motion into rotary motion; a spline is mainly used to connect two shafts and allows relative rotation between the shafts while transmitting torque. - Application scenarios: Ball screws are widely used in CNC machine tools, automated equipment, and industrial robots; splines are often used in automobiles, ships, and aerospace. - Load-carrying capacity: Ball screws have a relatively high load-carrying capacity and can withstand large axial and radial forces; splines have a relatively low load-carrying capacity and are suitable for transmitting smaller torques. - Transmission efficiency: Ball screws have relatively high transmission efficiency and can achieve high speed and accuracy; splines have relatively low transmission efficiency and are suitable for occasions with low speed and accuracy requirements. - Installation method: Ball screws usually need to be installed on special guide rails to ensure the accuracy of their linear motion; the installation method of splines is relatively simple and can usually be directly installed on the shaft.

2025

How can the precision of THK ball screws be maintained?

There are many brands and types of ball screws. Today, let's talk about THK ball screws. There are those made in Japan and those made in China, but the methods for maintaining the accuracy of THK ball screws are the same. We can start from the following aspects: 1. Correct Installation: • Ensure the surfaces of the screw and nut are clean and dust-free to prevent impurities from entering the ball circulation system. • Use high-precision measuring tools for accurate installation and positioning, ensuring the installation accuracy of the screw and nut, especially the parallelism and perpendicularity of the screw axis to the guide rail. • Apply appropriate preload to eliminate backlash, improving transmission accuracy and rigidity. • Choose an appropriate support method, using high-precision bearings and support seats to ensure the screw remains stable during movement. 2. Effective Lubrication: • Use a suitable lubricant to ensure the balls remain well-lubricated during movement, reducing wear. • Regularly check the lubrication status and lubricate according to the manufacturer's recommended maintenance cycle. 3. Protection and Sealing: • Install protective covers or sealing devices to prevent dust, chips, and other impurities from entering the ball screw. • Regularly check the sealing effect of the protective device to ensure its proper operation. 4. Precise Adjustment and Calibration: • After installation, perform adjustments and calibrations to ensure the running accuracy and stability of the ball screw. • Use high-precision measuring tools for calibration, such as laser interferometers and optical scales. 5. Professional Maintenance and Servicing: • Regularly perform maintenance and servicing, checking the running status of the ball screw and replacing worn parts in a timely manner. • Avoid overload operation to reduce deformation and damage to the ball screw. 6. Control Environmental Factors: • Temperature changes, high humidity, vibration, and other external conditions will affect the accuracy of the ball screw. • Measures should be taken to control these factors, such as a constant temperature environment and vibration reduction measures. 7. Lead Error Compensation: • For existing lead errors, lead error compensation technology can be used to optimize the positioning accuracy of the ball screw. By comprehensively applying the above measures, the accuracy of the THK ball screw can be effectively maintained, its service life can be extended, and its stable operation in high-precision and high-efficiency applications can be ensured.

2025

The Great Use of Clamps - Normally Closed Type

Small clamping devices (guide rail locks, clamps) have a big role and are used in many fields. They can work perfectly with linear guide sliders (THK linear guide sliders, HIWIN linear guide sliders, HTPM linear guide sliders). I. Working Principle The pneumatic normally closed clamp uses air pressure as a power source. It uses spring energy acting on a wedge block to achieve clamping, and uses air pressure to release the clamping. This design ensures that even in extreme cases of power failure or air pressure failure, the clamp can automatically lock, effectively preventing accidental movement and falling during the production process. It should be noted that the wedge block should not be removed before use, otherwise it will damage the components. II. Features and Advantages 1. Excellent Safety Performance: • Normally Closed Design: Remains closed when there is no air pressure, effectively preventing accidental release due to misoperation or air pressure failure. • Fast Response: Can complete braking action within milliseconds, ensuring rapid stop in emergencies. 2. High Precision and High Efficiency: • High Positioning Accuracy: Precise structural design and strong holding force allow the worktable to maintain high stability in a fixed state. • Adjustable Braking Torque: Flexibly adjust the braking force according to the weight, running speed, and work requirements of different equipment. 3. Wide Applicability and Environmental Adaptability: • Widely used in various stages of new energy vehicle production lines, such as battery pack assembly and precision assembly of motors. • Can work stably and reliably under harsh conditions such as high temperature, high humidity, dust, and oil stains. 4. Intelligence and Easy Maintenance: • Some high-end models incorporate intelligent technology, realizing seamless docking with the production line control system, enabling real-time monitoring and data analysis. • Has fault self-diagnosis and remote maintenance functions, reducing maintenance costs. III. Application Examples In the production process of new energy vehicles, pneumatic normally closed clamps are widely used in the assembly of key components such as battery modules and drive motors. Its precise clamping force and fast response characteristics ensure the stable fixation of these precision components, thereby improving product quality and consistency. At the same time, it also plays an important role in the fixed slide table and precision positioning device of the automated production line. In summary, pneumatic normally closed clamps are playing an increasingly important role in the field of automation of new energy vehicle production lines due to their unique design and excellent performance. With the continuous development of the new energy vehicle industry and the continuous progress of technology, it is believed that it will play an even more important role in the future.

2025

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