Chemical Environment

Self-Aligning Bearings for Chemical Liquid Environments

For use in chemical liquids or environments (Caustic Soda, Sulfuric Acid, Boric Acid / Special Shapes / Special Combinations) exposed to chemicals, we typically supply bearings in which the race rings and cage are made of plastic, while the balls are made of ceramic. Plastic Bearings for Cleaning with Hydrofluoric Acid Phosphoric Acid Resistant Plastic Bearing In such environments, plastic bearings—ranging from standard sizes to special shapes—can generally be used without issue. In this article, however, we introduce a self-aligning bearing with a special geometry and a special material combination. Plastic self-aligning ball bearings have a significantly lower load capacity compared with metal self-aligning ball bearings. Therefore, when higher loads[…..]

Plastic Bearings for Transporting Hoop Materials (Coil Materials)

This product is a specially shaped bearing with a flat groove on the outer diameter and an extended inner ring on one side. The groove shape can be custom-made to match the transported material. Can be used without collars when multiple bearings are installed in parallel. Excellent chemical resistance allows usage even in highly corrosive chemical solutions. The outer diameter section features a flat groove, enabling a custom-made design tailored to the size of thin metal sheets (hoop materials). This flat groove ensures precise guidance of the transported material, preventing scratches and damage. In addition to thin metal sheets (hoop materials), various groove shapes such as V-grooves and R-grooves can[…..]

Self-aligning Plastic Bearings for Film Sheet Transport Rollers (Dual-layer Structure)

These are self-aligning bearings used for transporting film sheets. Since the rollers are fully submerged in liquid, there was an inquiry regarding whether it would be possible to use bearings made of materials with chemical resistance, such as plastic or ceramic. The layout of the transport line can be imagined as follows: Initially, the design called for radial bearings, but because the film sheet’s tension could cause slight bending in the rollers, we proposed self-aligning bearings to ensure proper alignment even when deflection occurs. However, standard self-aligning bearings exceeded the permissible load, so we enhanced load-bearing capacity with the dual-layer structure shown in the image. In film sheet transport lines[…..]

Plastic Bearings in a Process for Surface Treatment of Thin Sheets

Our Self-aligning ball bearings were used in a process for surface treatment of copper sheets. Two rollers are suspended vertically, and the copper plate passes through the process by running between the rollers and being chrome-plated. Bearings were used at the top of these rollers. As the copper plate passes, the rollers tend to tilt and shift, hence a self-aligning function is required. Additionally, the rollers bear vertical loads, imposing additional requirements on the bearings. Therefore, we proposed our self-aligning ball bearings, which can accommodate this axial load. It is a special form not available in standard specifications, but we can manufacture it through CNC machining. Our company specializes in[…..]

Plastic Guide Bearings for the Cleaning and Transportation of Retort Packages

Our plastic bearings have been used in the process of cleaning and drying retort packages. Originally, metal bearings with a plastic coating were used. The production line for retort packages here uses tap water for cleaning and goes through a drying oven process. Due to the use of water, metal bearings face the problem of grease being washed out and rust formation. Furthermore, tap water contains calcium carbonate, so when passing through the drying oven after cleaning while still wet, calcium carbonate adheres inside the bearing, leading to faulty rotation. Therefore, we proposed the use of UHMWPE, which is non-sticky, and designed the shape of the bearings to be easy[…..]

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 for Cleaning with Hydrofluoric Acid

This is a plastic bearing that can be used for hydrofluoric acid cleaning of semiconductors and LCDs. We are the only company in Japan that manufactures ball bearings from PCTFE (Polychlorotrifluoroethylene). Plastic Bearings for Cleaning with Hydrofluoric Acid Our bearings have a specification of PCTFE (Poly Chloro Tri Fluoro Ethylene) for the main body and SiC (Silicon Carbide) for the balls. Hydrofluoric acid, used in the cleaning of semiconductors and LCDs, corrodes many metals, plastics, and ceramics. We manufacture PCTFE bearings that are resistant to hydrofluoric acid. PCTFE: Poly Chloro Tri Fluoro Ethylene (Polychlorotrifluoroethylene) is a hard plastic that has proven to be particularly resistant to hydrofluoric acid. Depending on[…..]

Plastic Bearings for Toluene Cleaning

One of our customers has chosen our plastic ball bearings for the film transport roller shafts. Race ring and cage: PEEKBalls: Aluminum oxide ceramic After using the equipment, metallic bearings corrode in a short period when cleaned with chemicals such as toluene. Although other plastic materials can be used with these chemicals, we chose PEEK due to slightly increased load. As you can see, not only chemicals but also other conditions such as load, rotation speed, and temperature are involved in the material selection process. If you are considering the use of plastic bearings, please contact us. Related Pages ・Deep-groove Ball Bearings ・Chemical Environment ・Cleaning Machines Back to[…..]

Pillow Block Bearings for Cleaning with Sodium Hypochlorite

Our pillow block bearings are used in the bearings of the vegetable cleaning equipment. Housing: Stainless steel Bush: UHMWPE (Ultra-high-molecular-weight polyethylene) Sleeve: SUS304 Since the unit is used in a tank with sodium hypochlorite, it would quickly rust if conventional pillow block bearings were used. Therefore, you have opted for our plastic pillow block bearings. These do not require lubrication and there are no worries about rust or corrosion. Depending on the operating conditions, bush materials such as PTFE or phenol may also be better suited. We can make material suggestions based on your operating conditions. Furthermore, the production of bushes with special shapes, such as groove machining in the[…..]

Phosphoric Acid Resistant Plastic Bearing

Phosphoric acid is commonly used in electroplating solutions and other applications. In phosphoric acid environments, conventional metal bearings can corrode. At Kashima Bearings, we manufacture bearings from materials resistant to phosphoric acid. These plastic bearings can be used without corrosion, leading to maintenance-free operation and longer service life. The resistance depends on the concentration and temperature, so please inform us of these details when making inquiries. Based on our experience, we can also create special material combinations tailored to your needs, even if they are not offered by other manufacturers. Additionally, depending on the load, speed, and other usage conditions, it might be advisable to use other materials. Please inform[…..]

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