Shenhua Ya dual-axis linear guide is a type of roller linear guide. Its transmission principle is that the U-shaped rollers mounted on the slider contact the steel shaft mounted on the guide rail to achieve linear motion by rolling.
I. Construction of a Dual-Axis Linear Guide
The dual-axis linear guide is mainly assembled from aluminum alloy guide rails, steel shafts, aluminum alloy sliders, rollers, eccentric wheels, and screws. Depending on the application, accessories such as locking handles, springs, oil seals, and rubber rings may also be added.
II. High-speed dual-axis linear guide
The high speed of dual-axis linear guides is relative to ball linear guides. Because the balls of dual-axis linear guides are sealed inside U-shaped rollers and do not come into contact with the external environment, the structure is stable. In addition, the rollers and the steel shaft have a similar line contact, resulting in a low coefficient of friction and strong heat dissipation, thus enabling high speeds.
III. The Silent Operation of Dual-Axis Linear Guides
Dual-axis linear guides not only offer high speeds but also low noise. Those familiar with ball linear guides know that they generate significant noise during operation, especially at certain speeds. This noise originates from the rolling of numerous balls within the slider. However, dual-axis linear guides, due to their small contact area between the rollers and the guide rail, experience less friction and thus produce much less noise. Therefore, dual-axis linear guides are also known as silent guides.
IV. Load on a dual-axis linear guide
Dual-axis linear guides are made of aluminum alloy and are mainly designed for light loads, typically up to 50KG.
V. Maintenance and Care of Dual-Axis Linear Guides
Dual-axis linear guides are much simpler to maintain than ball-bearing linear guides because most of the material of dual-axis guides is aluminum alloy. The surface of the aluminum alloy has undergone electrophoretic treatment, making it hard, corrosion-resistant, and rust-resistant. Therefore, this part does not require much maintenance; you only need to wipe the dust off with a cotton cloth periodically.
The key points for maintenance of dual-axis linear guides are the rollers, steel shafts, and eccentric wheels, which are prone to corrosion.
1. Maintenance of U-groove rollers. The rollers are internally greased and sealed before leaving the factory, so no internal maintenance is required. Maintenance mainly focuses on the exterior. The rollers are made of bearing steel, and although the surface is treated with rust prevention, the rust-preventive layer will gradually disappear at the groove where it contacts the steel shaft due to long-term friction. Exposure to moisture in the air will then cause rust. Therefore, when the rollers are not used for an extended period, rust-preventive oil can be applied to prevent rust.
2. Maintenance of the steel shaft. Similar to the principle of U-groove rollers, when not in use for an extended period, apply rust-preventive oil to prevent rust.
3. Maintenance of the eccentric wheel. The function of the eccentric wheel is to adjust the preload between the roller and the guide rail steel shaft. Therefore, rust is prone to occur at the screw holes. Rust-preventive oil can be applied regularly to prevent rust.
VI. Selection of Dual-Axis Linear Guides
Although dual-axis linear guides appear simple in construction, they are high-precision components, and even the slightest difference can lead to significant variations in the quality of the finished product. Therefore, when choosing dual-axis linear guides, one should consider not only the price, but also the materials used, the level of craftsmanship, and the manufacturer's capabilities.
