Linear Bearing Tolerance
The quality and performance of linear bearings are closely tied to their dimensional accuracy. These bearings are categorized into high class and precision class, and this classification is detailed in the dimension charts for easy reference. In particular, clearance adjustable type and open type have outer diameter values measured before machining. Users must take this into consideration during design and installation to maintain precision and ensure optimal performance.
Linear Bearing Load Rating and Life Expectancy
The service life of a linear bearing depends on various factors such as the actual load applied, motion cycle, operating temperature, and surface hardness. Calculating both the rated life and the operational life expectancy helps users to predict performance and schedule timely maintenance or replacement, improving the overall reliability and efficiency of the system.
Linear Bearing Basic Life Expectancy Formula
The rated life (L) of a slide bush can be obtained from the following equation:
- L: Rated life [km]
- C: Basic dynamic load rating [N]
- P: Actual load [N]
- fₕ: Hardness factor (surface treatment, ball material)
- fₜ: Temperature coefficient (adjusted for high heat environments)
- f_c: Contact coefficient (based on design and contact type)
- f_w: Load coefficient (considers direction and fluctuation of loads)
When Stroke Length and CPM are Constant:
When the stroke length and cycles per minute are fixed, the expected service time in hours can be calculated as follows:
- Lₕ: Lifespan [hr]
- l: Stroke length [m]
- n: Number of strokes per minute (CPM)
These formulas offer a quantitative foundation for evaluating product reliability and aid in proper design decisions.
HEADWAY specializes in providing a wide range of precision metal components through research and development, production, and sales in one, with an emphasis on after-sales service. If you have components under development in the field of semiconductor applications, and would like to seek professional technical services to enhance the quality of the products in line with the overall efficiency of the equipment, or would like to learn more about the linear bearings in semiconductor production applications, please feel free to contact us, HEADWAY - Millions of parts. One solution.
