Four typical dynamic pressure bearings and their operating environment

Four Typical Hydrodynamic Bearings and Their Operating Environments

Source: China Bearing Network | Date: March 18, 2014

Hydrodynamic bearings are essential components in high-precision machine tools, providing smooth and stable operation under various load and speed conditions. Below are four common types of hydrodynamic bearings along with their typical applications: 1. **Deep and Shallow Cavity Hydrodynamic Bearings**: These are ideal for high-speed, light-load spindle systems commonly found in machine tools such as the M1432 cylindrical grinder or the MGA6025 surface grinder. They offer excellent stability at high rotational speeds. 2. **Hole-Type Toroidal Deep and Shallow Cavity Bearings**: Suitable for medium-speed and medium-load applications, these bearings are often used in machines like the MG1432 cylindrical grinder or roll grinders. They provide a balance between performance and durability. 3. **Pin-Type Internal Reaction Bearings**: Designed for spindles that experience variable loads and speeds, these bearings are particularly useful in demanding environments where both high load capacity and adaptability are required. 4. **Conical Hydrostatic Bearings**: These are typically used in high-speed internal grinding head systems, such as the 2110 internal grinding head, electric spindles, and internal channel grinders. They offer superior precision and stability under high-speed conditions. **Important Application Notes**: - After one year of normal operation, it is recommended to replace the 2# spindle oil and clean the coarse and fine filters. - When refilling oil into the pump station, always use three layers of silk cloth filtration to ensure oil purity. - When loading or unloading the spindle pulley and grinding wheel, make sure the pump station is running. This ensures the spindle is floating on static pressure oil, preventing damage to the bearing and spindle. - Before starting the grinding wheel spindle, check if the pump station pressure and static pressure of the grinding head are within the standard range. - When shutting down the equipment, first stop the grinding head motor, wait until the grinding wheel stabilizes, and then turn off the pump station. Failure to follow this procedure may cause damage to the grinding head. - When replacing parts on the pump station, first disconnect the high-pressure oil inlet hose. After replacement, allow the oil circuit to self-circulate for 15–20 minutes before reconnecting the oil line to the grinding head. This ensures that the oil entering the grinding head is ultra-clean and finely filtered. For more information on bearings and related technologies, visit China Bearing Network.

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