Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When standard steel bearings corrode, seize, or contaminate a process, engineers and makers working in food-grade equipment, medical devices, aquatic systems, and chemical-exposure applications need a reliable alternative. These glass ball bearings with POM (polyoxymethylene) plastic deep groove races are engineered specifically for environments where metal simply cannot be used — delivering smooth, low-friction rotation without rust, magnetism, or electrical conductivity.
Each bearing features precision-ground borosilicate or soda-lime glass balls seated in a POM plastic outer and inner race, forming a complete deep groove ball bearing assembly. Inner diameters span 6 mm to 30 mm (~0.24" to 1.18"), with outer diameters and widths varying by size — see variant options for exact dimensions. The all-plastic and glass construction keeps the total weight light, typically ranging from a few grams for the smallest sizes up to approximately 30–50 g for the largest.
Typical use cases include RC boat and drone pivot points requiring non-magnetic bearings, laboratory centrifuge and pump assemblies where metal contamination is unacceptable, food processing conveyor rollers and packaging machinery requiring FDA-compatible materials, and aquarium or hydroponics pump impellers exposed to continuous moisture. The waterproof, non-corroding design also suits saltwater fishing reel rebuilds and marine hardware where glass ball bearings for wet environments outperform conventional steel options.
| Bearing Type | Deep Groove Ball Bearing |
|---|---|
| Ball Material | Glass (borosilicate or soda-lime) |
| Race Material | POM (Polyoxymethylene) Plastic |
| Inner Diameter (ID) | 6 mm – 30 mm (0.24" – 1.18") |
| Outer Diameter (OD) | See variant options |
| Bearing Width | See variant options |
| Lubrication | Self-lubricating (POM material); no grease required |
| Waterproof | Yes — fully waterproof, no seals required |
| Corrosion Resistance | Resistant to water, mild acids, alkalis, and most solvents |
| Magnetic Properties | Non-magnetic |
| Electrical Conductivity | Non-conductive |
| Operating Temperature | Typically –20°C to +90°C (–4°F to +194°F) |
| Available Quantities | 1 / 2 / 5 / 10 / 20 / 50 pcs per order |
Measure the shaft diameter that the bearing will sit on — this is your required Inner Diameter (ID). Then confirm the housing bore that the bearing's outer race must fit into (Outer Diameter). Finally, check the available axial space to ensure the bearing width fits. Select the matching ID variant above and contact us if you need OD/width confirmation for a specific size.
Glass ball bearings are suited for light to moderate radial loads in low-to-medium speed applications. They are not recommended for heavy impact loads or high-speed industrial machinery where steel bearings are the standard. They excel in precision instruments, pumps, food equipment, and hobby/RC applications where corrosion resistance and contamination-free operation matter more than maximum load capacity.
Precision glass balls used in bearings are manufactured to tight sphericity tolerances and are significantly harder and more durable than common glass. Under normal radial loads within the bearing's rated capacity, breakage is not a concern. Avoid shock loads, over-tightening, or misalignment, which can stress any bearing type regardless of ball material.
Yes. Both the glass balls and POM plastic races are inherently waterproof and resistant to corrosion from water, mild acids, alkalis, and many common solvents. This makes them a reliable choice for aquatic pumps, marine hardware, hydroponics systems, and food-processing equipment exposed to wash-down cycles. For highly concentrated acids or specific chemical compatibility, contact us to confirm suitability.
POM plastic is a self-lubricating material, so these bearings can operate dry without added grease or oil in most light-duty applications. If your application involves continuous high-speed rotation or elevated temperatures, a small amount of PTFE-based dry lubricant can be applied to reduce friction further without compromising the corrosion-resistant properties.
The all-glass and POM plastic construction contains no metallic components, making these bearings suitable for environments where metal contamination must be avoided. POM is widely used in food-contact applications. However, for regulated food or medical device applications, please verify compliance with the specific standards applicable to your industry (e.g., FDA 21 CFR, EU 10/2011) before use.
The numeric codes in the SKUs correspond to specific bearing dimension series — for example, 2623 refers to a bearing with a 3 mm ID, 2624 to a 4 mm ID, and so on, following a common miniature bearing naming convention. The ID listed in the product title (6 mm – 30 mm) covers the full range available across all variants. Select the variant that matches your required shaft diameter.
🛒 Select your bearing size and quantity above, then add to cart.
