What are the characteristics, installation, and lubrication methods for miniature linear guides?
Release date:
2022-12-12
The primary performance characteristic of miniature linear guides is their high positioning accuracy. The motion of these miniature guides is achieved through rolling steel balls, resulting in low friction resistance between the guide pairs, minimal difference in static and dynamic friction coefficients, and reduced tendency for creep at low speeds. With their high positioning accuracy, these guides are particularly suitable for moving components that frequently start or change direction. The positioning accuracy of machine tools can be set to sub-micron levels. Additionally, it is advisable to appropriately increase the preload as needed to prevent the steel balls from slipping, ensuring smooth motion and minimizing impact and vibration during operation. Moreover, compared to fluid lubrication on sliding rail surfaces, miniature linear guides experience less wear; however, motion accuracy errors caused by fluctuations in the oil film are unavoidable. In most cases, fluid lubrication is confined to boundary regions, making direct metal-to-metal contact and associated friction inevitable. In such frictional conditions, a significant amount of energy is wasted due to frictional losses. By contrast, rolling contact involves much lower frictional energy consumption, and frictional losses on the rolling surfaces are correspondingly reduced, enabling rolling linear guide systems to maintain high precision over extended periods. Furthermore, since lubricating oils are rarely used, the design, operation, and maintenance of machine lubrication systems become remarkably simplified. These guides are well-suited for high-speed applications, significantly reducing the required drive power. Machines equipped with rolling linear guides exhibit low friction resistance. Consequently, the power sources and power transmission mechanisms can be downsized, driving torque is greatly reduced, and the overall power requirement of the machine is lowered by 8%.
Micro rail Its main performance characteristics include high positioning accuracy. The motion of the miniature guide rail is achieved through rolling steel balls, resulting in low friction resistance between the guide rail pairs, minimal difference in static and dynamic friction coefficients, and reduced tendency for creep at low speeds. With its high positioning accuracy, this guide rail is particularly suitable for moving parts that frequently start or change direction. The positioning accuracy of machine tools can be set to sub-micron levels. Additionally, it is advisable to appropriately increase the preload as needed to prevent the steel balls from slipping, ensuring smooth motion and reducing impact and vibration during operation.
Meanwhile, compared to fluid lubrication on sliding rail surfaces, miniature linear guides experience less wear. However, motion accuracy errors caused by fluctuations in the oil film are unavoidable. In most cases, fluid lubrication is confined to boundary regions, making direct metal-to-metal friction an inevitable consequence. In such frictional interactions, a significant amount of energy is wasted due to frictional losses. By contrast, rolling contact involves much lower frictional energy consumption, and frictional losses on the rolling surfaces are correspondingly reduced, enabling rolling linear guide systems to maintain high precision over extended periods. Moreover, since lubricants are used sparingly, the design, operation, and maintenance of machine lubrication systems become remarkably simple. These systems are well-suited for high-speed motion, greatly reducing the required drive power. Machines equipped with rolling linear guides exhibit low frictional resistance. As a result, the size of the power source and power transmission mechanisms can be significantly reduced, driving torque is substantially lowered, and the overall power requirement of the machine drops by as much as 80%, yielding remarkable energy savings. Consequently, miniature linear guides enable high-speed motion, boosting machine tool efficiency by 20% to 30%.
Installation method for miniature rails:
1. Before assembly, clean any dirt from the guide rail mounting surface and use an oilstone to remove burrs from the mounting surface.
2. The guide rails should be handled with care to avoid collisions. Place the linear guide rail smoothly onto the mounting surface, ensuring that the reference surface on the side of the guide rail is close to the assembly surface of the worktable (the straightness of the assembly surface must be excellent).
3. Try fitting the screws to confirm their compatibility, then secure the bottom of the rail to the reference surface of the workbench.
4. Use a torque wrench to tighten the assembly screws to a specified torque.
5. For guide rails that require splicing, please inform the company at the time of ordering and install them according to the splicing drawings and requirements provided by the company.
Lubrication of miniature rails:
1. Miniature guide rails are precision transmission devices that require regular lubrication. Proper lubrication is essential—it can reduce friction, minimize wear, and extend the service life.
2. The miniature guide rail should be lubricated at medium and low speeds, with lubrication performed once every 40 km of travel. At high speeds (above 35 m/min), use N32 lubricant for lubrication. If necessary, a centralized lubrication system can be used for automatic lubrication.
Micro rail
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