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Engineers and DIY builders who work in wet, chemically aggressive, or electrically sensitive environments know the frustration of steel bearings that corrode, seize, or conduct unwanted current. These POM plastic deep groove ball bearings are designed specifically for those conditions — delivering smooth, low-friction rotation where standard steel bearings fall short.
Each bearing features a POM (polyoxymethylene) engineering plastic race combined with precision rolling elements. The range spans inner diameters from 3 mm (0.12 in) to 70 mm (2.76 in) and outer diameters from 9 mm (0.35 in) to 100 mm (3.94 in), covering the 60x, 62x, 63x, and 69xx series. Sealed variants (single-side -RS and double-side -2RS) are available for the 608 size to retain lubrication and exclude contaminants.
Typical applications include food-processing conveyor rollers where metal contamination must be avoided, RC car and drone pivot points requiring lightweight non-magnetic rotation, laboratory instrument carriages sensitive to electromagnetic interference, and marine or poolside equipment exposed to continuous moisture. The low density of POM also reduces rotational inertia, making these bearings a practical choice for high-speed, low-load spindle assemblies.
The outer and inner races are machined from POM engineering plastic, which resists water, mild acids, alkalis, and many solvents — eliminating the rust and surface pitting that shortens steel bearing life in humid or chemically active environments.
POM is an electrical insulator, making these bearings suitable for motor test rigs, PCB handling equipment, and any application where stray currents or electrostatic discharge through the bearing must be prevented.
POM has roughly one-seventh the density of steel. The reduced rotating mass lowers starting torque and energy consumption in high-cycle or battery-powered applications such as drones, robotic joints, and precision instruments.
Available in 32 distinct sizes across the 60x, 62x, 63x, and 69xx series (inner diameter 3–70 mm), with packing quantities of 1, 2, 5, or 10 pieces per order — allowing both prototyping single units and stocking bulk quantities.
The 608 size is offered in open, single-side rubber-sealed (-RS), and double-side rubber-sealed (-2RS) configurations. Sealed variants retain grease and block particulate ingress, extending service intervals in dusty or splashing environments.
The POM race material has inherent damping properties that reduce vibration transmission and operating noise compared to all-steel bearings — a measurable advantage in precision measurement devices, medical equipment, and quiet office automation.
| Bearing Type | Deep Groove Ball Bearing |
|---|---|
| Race Material | POM (Polyoxymethylene) Engineering Plastic |
| Rolling Element | See variant options |
| Series | 60x, 62x, 63x, 69xx |
| Inner Diameter Range | 3 mm – 70 mm (0.12 in – 2.76 in) |
| Outer Diameter Range | 9 mm – 100 mm (0.35 in – 3.94 in) |
| Width Range | 3 mm – 16 mm (0.12 in – 0.63 in) |
| Seal Options | Open / Single-Side Seal (-RS) / Double-Side Seal (-2RS) |
| Lubrication | See variant options |
| Operating Temperature | Typically –40 °C to +100 °C (–40 °F to +212 °F) |
| Corrosion Resistance | Water, mild acids, alkalis, many solvents |
| Electrical Properties | Non-conductive (insulating) |
| Packing Quantity Options | 1 / 2 / 5 / 10 Pcs |
| Weight per Unit | See variant options |
Match the bearing bore (inner diameter) to your shaft diameter and the outer diameter to your housing bore. For example, a 608 bearing has an 8 mm bore, 22 mm OD, and 7 mm width. Cross-reference the size label in the variant selector (e.g., "608 (8×22×7 mm)") against your measured shaft and housing dimensions. If you are replacing an existing bearing, the size code is usually stamped on the bearing face.
POM plastic bearings are designed for light to moderate radial loads at low to medium speeds. They are not a direct substitute for steel bearings in heavy-load or high-speed industrial machinery. They perform well in applications such as conveyor guides, instrument carriages, RC vehicles, and light automation where the load per bearing is typically under a few hundred Newtons. Contact us to confirm suitability for your specific load and speed requirements.
The POM race resists fresh water, seawater, mild acids (e.g., dilute acetic acid), mild alkalis, and many organic solvents. POM is not recommended for prolonged exposure to strong oxidizing acids (e.g., concentrated nitric acid) or strong bases at elevated temperatures. For food-processing or marine use, POM bearings are a reliable choice where stainless steel bearings would be cost-prohibitive.
Open bearings allow free lubrication access and suit clean, dry environments or applications where the bearing is re-lubricated frequently. Single-seal (-RS) bearings protect one side from dust and moisture — useful when one face is exposed to contamination. Double-seal (-2RS) bearings are sealed on both sides, retaining factory grease and blocking ingress from both directions — the best choice for dusty, wet, or maintenance-free installations. Note: sealed options are currently available for the 608 size.
POM is widely used in food-processing machinery because it does not rust and leaves no metallic contamination. However, food-grade certification requirements vary by region and application. If your application requires FDA-compliant or NSF-certified materials, please contact us to confirm the specific grade of POM used before ordering.
The series designation indicates the cross-section (wall thickness relative to bore). The 60x series has the thinnest cross-section for a given bore, making it the lightest and most compact option. The 62x series has a medium cross-section with a larger OD and higher load capacity for the same bore. The 63x series has the widest cross-section and the highest load rating among the three. Choose 60x for space-constrained designs, 62x for general-purpose use, and 63x when load capacity is the priority.
Each variant (size + packing quantity combination) is ordered separately. To purchase multiple sizes, add each size variant to your cart individually. Bulk packs of 5 or 10 pieces per size are available and offer a lower per-unit cost compared to single-piece orders.
