Dry Environment

Grease-Free High-Temperature Plastic Bearings for Furnace Applications (Up to 350 °C)

This bearing is used in components located near industrial furnaces. Since any contact with oil would be unacceptable, metal bearings could not be used. Therefore, a grease-free bearing solution with high temperature resistance was required. As the bearing is exposed to hot air of approximately 250°C near the furnace, it was determined that even high-performance materials such as PEEK might not be sufficient. For this reason, a carbon bearing with heat resistance up to 350°C was proposed. This bearing can operate without lubrication, preventing contamination of the product. In conventional carbon bearings, the cage cannot be made of carbon and is therefore typically manufactured from plastic. However, plastic cages have[…..]

Plastic Pillow Block Bearings Used in Seedling Tray Washing Machines

In seedling tray washing processes, components are used in harsh environments involving a combination of water and mud. With conventional metal pillow block bearings, the following issues were encountered: Occurrence of rust Wear of sliding surfaces Abnormal noise and frequent lubrication requirements By adopting our UKB plastic pillow block, the following improvements were achieved: Maintenance-free operation Significant reduction in wear In this application, a sleeve-less design was used due to the small shaft diameter. In muddy or dirty water environments, bearings are typically provided with grooves to allow contaminants to be discharged. For grooved plastic bushings, please refer to the following application example: ▶Pillow Block Bearings for Conveyor Rollers in[…..]

UKB Pillow Block with Vertical Grooved Bushing (Countermeasures for Foreign Particles and Wear Debris in Underwater, Liquid, and Dry Environments)

Case Example of Vertical Grooves Processed in Bushings Used for Pillow Blocks Our pillow blocks come standard as a set of three components: the housing, bushing, and sleeve. The use of vertical grooves is beneficial for the following purposes: preventing foreign material intrusion, serving as a passage for liquids, and managing wear debris. [Foreign Material Prevention] In environments where there is a risk of foreign materials like dust intruding, such materials can enter the sliding parts, leading to rotational failure or reduced lifespan. In such environments, applying vertical grooves can help expel foreign materials, ensuring they do not obstruct rotation. [Use as a Liquid Passage] Environments involving liquids such as[…..]

Bushing with Inner Grooves (Spiral Grooves)

This is a product with spiral grooves on the inner diameter of the bushing. There are various applications: Wear Debris Countermeasures:When the shaft and resin bush slide against each other, wear debris is generated and can be expelled through these grooves. Minimal wear debris is produced under light loads, but significant loads invariably generate wear debris. Although these grooves cannot expel all wear debris, they contribute to longer service life compared to bushings without grooves. Foreign Matter Countermeasures:In certain environments, foreign matter may enter the system. If this matter enters the gap between the shaft and the sliding bearing, it can cause damage and rotation failure. The grooves aim to[…..]

Plastic Bearings for Extremely Cold Environments

Our bearings were used for the ice cream production line. Due to the manufacturing of ice cream in extremely cold environments and the use of cleaning agents during the cleaning process, a transition to plastic was considered. Because of the extremely low temperatures, we recommended the use of PTFE from our side. PTFE is a material that can be used even in extremely low temperatures of up to -268°C. However, it should be noted that dimensional changes occur significantly at temperatures. Therefore, it is important to consider the change in dimensions when used in high or low temperatures. Furthermore, we also offer materials that have been enhanced with fillers to[…..]

Cam Follower Bearing Made Entirely of Plastic

This product was developed in response to the request, “Can cam followers be made of plastic?” The desire was to use plastic because metal parts could potentially cause malfunctions in a testing device. Integrating the bearing and screw reduces the number of parts and simplifies replacement. Additionally, due to the plastic material, there is no risk of damaging the workpiece. The illustrated screw sizes are M4 and M10, but manufacturing is possible regardless of the standard. Within the testing device, it is used as a guide rail for positioning as well as a transport roller over which the workpiece rolls to the next processing stage. Related Pages ・Custom-made Ball Bearings[…..]

Plastic Bearings for Conveyor Rollers in the Food Cleaning Process (Alcohol Cleaning, etc.)

This is an example of using bearings in the alcohol cleaning of kamaboko, processed fish paste. In this process, stainless steel bearings were used, but the alcohol washed out the internal grease, leading to faulty rotation. By switching to PEEK bearings, the bearings can be used without grease, eliminating concerns about corrosion or deterioration from alcohol. Related Pages ・Ball Bearings ・PEEK ・Dry Environment ・Food Back to Case studies

Plastic Slide Bearings in a Chemical Environment

Our plastic slide bearings were used for the monitoring camera in a manufacturing process. While the manufacturing facility is in operation, the camera extends, and when the line stops, the camera retracts. Our slide bearings were used for this extension and retraction mechanism. Since this manufacturing process takes place in an environment with chemical solutions, a metallic solution would corrode quickly. Therefore, our customer considered using plastic. We suggested PEEK slide bearings from our product range. Since the shaft is made of stainless steel, we used ceramic balls. Related Pages ・PEEK ・PTFE ・Chemical Environment ・Dry Environment Back to Case studies

Plastic Bearings in the Cleaning Process of Ampoules

Our plastic bearings were utilized for the ampoule cleaning process. Initially, two miniature plastic bearings from other manufacturers were used to avoid the wear of metal powder. However, wear problems also arose with the plastic bearings, leading to difficulties. One of the reasons was the strength of the plastic material, but the fact that they were standard products also led to dimensional interference and accelerated wear. Therefore, we proposed using PEEK bearings with a multi-row configuration tailored to the device’s dimensions, which resolved the issue. In our case, the multi-row configuration that combines both bearings is more cost-effective than using two separate bearings. Related Pages ・Ball Bearings ・Custom-made Ball Bearings[…..]

Plastic Bearings for Glass Cleaning Lines

Our bearings were used on conveyor belts for glass products. The use of metal bearings when cleaning ground glass results in water contamination due to lubricating grease. Worse yet, glass particles reduce bearing lubrication, leading to increased wear on the bearings and higher production downtime. To eliminate the problem, we offered our plastic bearings. The bearing dimensions are designed according to the current machine equipment to avoid design changes to the machines. Future design changes, such as longer shafts, are also individually accommodated by us. In the specific example, a self-aligning ball bearing was used. This allowed us to ensure maximum flexibility of the shaft. Thus, changes in shaft length[…..]

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