Bearing Rear Code Explanation (4)
Understanding the rear code of bearings is essential for identifying and selecting the right type of bearing for specific applications. In this article, we will continue to explain the rear code system, focusing on the cage material and design used in various bearing types.
| /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089'; |
The following table provides a detailed explanation of the cage layout and materials used in different bearing types:
| Bearing Type | Cage Layout and Information |
| Deep Groove Ball Bearings |
1. When the outer diameter D ≤ 400mm, use stamped steel or brass cages. 2. When the outer diameter D > 400mm, use solid brass cages. |
| Self-Aligning Ball Bearings |
1. When the outer diameter D ≤ 200mm, use stamped steel cages. 2. When the outer diameter D > 200mm, use solid brass cages. |
| Cylindrical Roller Bearings |
1. For single-row cylindrical roller bearings, when D ≤ 400mm, use stamped steel cages; when D > 400mm, use solid steel cages. 2. For double-row cylindrical roller bearings, use solid brass cages. |
| Spherical Roller Bearings |
1. Symmetric spherical roller bearings (with an active retaining ring) use stamped steel cages. 2. Other spherical roller bearings use solid brass cages. |
| Needle and Long Cylindrical Roller Bearings | Use stamped steel or hard aluminum cages. |
| Angular Contact Bearings |
1. Non-separable angular contact ball bearings use phenolic laminated tube solid cages. 2. Double-split inner or outer ring (three-point or four-point contact) ball bearings use aluminum solid cages. 3. For angular contact ball bearings with a contact angle α = 15° or 25°, when D < 250mm, use phenolic laminated tube solid cages. For α = 40°, when D > 250mm, use steel plate pressed cages. For D > 250mm, use brass or hard aluminum solid cages. 4. P5/P4/P2 grade angular contact ball bearings use phenolic laminated tube solid cages. |
| Tapered Roller Bearings |
1. When the outer diameter D ≤ 650mm, use stamped steel cages. 2. When the outer diameter D > 650mm, use solid steel cages. |
| Thrust Ball Bearings |
1. When the outer diameter D ≤ 250mm, use stamped steel or brass cages. 2. When the outer diameter D > 250mm, use solid cages. |
| Thrust Roller Bearings |
1. Thrust cylindrical roller bearings: use solid cages. 2. Thrust spherical roller bearings: use solid cages. 3. Thrust tapered roller bearings: use solid cages. 4. Thrust needle roller bearings: use stamped cages. |
Understanding these cage types and their applications can help you make better decisions when selecting bearings for your machinery. Whether it's for high-speed operation, heavy loads, or precision requirements, choosing the correct cage material ensures optimal performance and longevity of the bearing.
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| Related Bearing Knowledge |
| SKF bearing techniques for machine tool spindles, bimetallic bearing housings, JBD market characteristics, identification of electric fan bearings, sliding bearing scraping needs analysis, how to improve INA bearing accuracy. |
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Previous: Installation methods for deep groove ball bearings with ball gaps are discussed in the next section: "Difficulties and Handling Tips" in Bearing Operation.
Piston seal is a kind of seal used to seal between piston and cylinder, usually used in hydraulic system and Pressure system. The piston seal can prevent liquid and gas leakage, and also prevent external impurities from entering the system, thus maintaining the normal operation of the system.
Piston seals can be classified based on their structure and material. According to different structures, piston seals can be divided into unidirectional seals and bidirectional seals. A unidirectional seal can only prevent the leakage of liquid or gas from one direction, while a bidirectional seal can prevent the leakage of liquid or gas from both directions. According to different materials, piston seals can be divided into rubber seals, polyurethane seals, polytetrafluoroethylene seals, etc.
In hydraulic systems, piston seals are typically used to seal hydraulic cylinders and pumps. The piston seals in hydraulic systems need to have characteristics such as high temperature resistance, corrosion resistance, and wear resistance to ensure long-term stable operation of the system. In Pressure system, piston seals are usually used to seal cylinders and pumps. The piston seals in the Pressure system need to be resistant to high pressure, low temperature, wear and other characteristics to ensure the normal operation of the system.
In addition to hydraulic system and Pressure system, piston seals can also be used in other industrial fields, such as automobile, aviation, machinery, etc. In the automotive industry, piston seals are commonly used in engines to ensure normal engine operation. In the aviation industry, piston seals are commonly used in the hydraulic system of aircraft to ensure normal takeoff, landing, and flight. In the field of machinery, piston seals are commonly used in hydraulic and press machines to ensure the normal operation of the machine.
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