Fröhlich & Dörken ist spezialisiert auf Wälzlager Sonderlösungen. An dieser Stelle finden Sie immer wieder neue Berichte, wie wir die Probleme mit unseren Kunden gemeinsam gelöst haben. Besonders in den wälzlagerbasierten Anwendungen können wir sehr viel Know How zurückgreifen. Wir konzipieren die unterschiedlichsten Hybridlager, indem verschiedene Werkstoffe zum Einsatz kommen. Sowohl Material als auch Geometrie können wir so auslegen, dass Ihre Anwendung perfekt läuft. Gerne beraten wir Sie vort Ort oder in einem TEAM Meeting. Wir freuen uns auf Ihre Herausforderung!
" Hybrid bearings as a solution for your application
" Maintenance-free bearings with Peek special cage
" Inner and outer ring made of stainless steel, ceramic balls
Special ball bearings for medical technology / laboratory technology
- Application of the customer
The customer we would like to introduce to you today is active in chemical medical technology. Its products are used in laboratories and offer solutions in centrifugal technology. In medical laboratories, substances are centrifuged, which means the sedimentation (separation) of different substances into their individual components. It is very important for our customer's customers to receive simple, efficient, durable, functionally based and sophisticated centrifuges. - Problem of the customer
The following challenges arise in this application:
Due to the centrifuging process, there is a risk that the grease from the ball bearings will contaminate the samples. The grease escaping from the ball bearings due to the centrifugal force could therefore contaminate the laboratory samples. This must be prevented at all costs. For this reason, the bearings are used without grease in this application. This in turn causes the problem that the ball bearings start to rust. Without lubrication, the service life is also considerably shortened, partly due to increased heat generation.
- Solution approach
But how can a ball bearing achieve its optimum service life without lubricant? Lubrication with rolling bearing grease is elementary for the service life. The ball bearing essentially consists of six components: inner ring, outer ring, cage, balls, grease and sealing washers. Based on our findings, we have optimized the following components: - Solution
We replaced the material of the inner and outer rings to increase corrosion resistance. Stainless steel proved to be a more suitable material.
The geometry of the raceways corresponds to that of a four-point bearing.
We also turned the ball bearing into a hybrid bearing by using ceramic balls. All that remained was the question of the grease! Our technical team did a great job here. We selected a special Peek cage that provided an excellent solution to this problem. The cage is made up of various components, resulting in automatic lubrication without contaminating the laboratory samples. The cage now takes over the function of the lubricant. - Customer benefit
The customer was previously only able to solve the problems partially and only by carrying out complex assembly work himself. This resulted in high labor costs. The improved corrosion resistance has also significantly increased the service life of the bearings. In addition, the maintenance intervals of the products are significantly extended. Thanks to the longer service life of the bearings, our customer not only saves money, but we also save important resources and thus protect the environment.
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