Linear guides are indispensable components in modern automated equipment, CNC machine tools, laser equipment, robots, and other systems. However, in actual use, we often encounter various problems. Below, we have compiled some common problems users encounter when using linear guides and their solutions.
1. Height Difference at the Joint of the Guide Rails, Creating a Step
This is generally caused by insufficient cleanliness. Previously, when two sections of guide rail were joined together, a slight unevenness was felt when touched with a finger. This was due to insufficient cleanliness, which leads to uneven slider operation and reduced lifespan.
2. Indentations on the Linear Guide Track and Cracked Ball Bearings in the Slider
This is generally due to excessive load, causing the steel balls to detach from the track, resulting in cracking and continued damage to the track. Solutions include replacing the slider with a larger one, increasing the number of sliders, reducing the external load, and changing the installation method to reduce the load-bearing capacity on one side. If the problem is due to lubrication, the amount of lubricating oil needs to be increased, and the lubrication interval needs to be reduced. Regularly check for foreign objects. If foreign objects are found, improve the sealing of components or add dustproof components.
3. Slider End Cap Deformation and Cracks
Incorrect installation may cause the slider and track to bear force only on one side. External force may also cause deformation or cracking of the slider end cap. Replace with a higher-performance lubricating grease, increase the amount of lubricating oil, and reduce the lubrication interval.
Precautions
1. What problems will occur if the slider detaches from the track?
When the slider is removed, the steel ball will fall off. This can be solved by using a dummy track.
2. What are the maximum temperature and maximum speed that a linear guide can withstand?
General linear guides can withstand temperatures below 80°C, and those made of high-temperature resistant materials can withstand temperatures below 150°C. Linear guides from domestic brands can generally reach speeds of 3 m/s. INA linear guides can reach speeds of 5 m/s.
3. What precautions should be taken when using a linear guide grease gun?
When injecting grease into the slider, it should be injected in multiple stages. After each grease injection, slide the slider approximately five times its own length, and repeat several times. If all the grease is injected at once, some will leak through the seals, preventing the prescribed amount from being injected into the slider. After successfully injecting the prescribed amount of grease, to ensure even distribution throughout the slider, slide it approximately five times its own length, and repeat several times. If the linear guide rail length is less than five times the slider length, slide the slider to its maximum stroke length as much as possible.
Summary
The lifespan and performance of linear guides depend not only on product quality but also on proper installation, lubrication, and maintenance. When problems arise, do not rush to replace; first check for installation errors, lubrication conditions, cleanliness, and preload adjustment.