Plastic ball bearings
Plastic ball bearings are lubrication-free bearings composed of engineering-plastic inner and outer rings paired with glass or plastic balls. They are rust-proof, corrosion-resistant, quiet and smooth-running, and lightweight, making them widely used in household appliances, doors and windows, toys, assembly lines, aquarium equipment, small transmission pulleys, and other applications. They are non-conductive, non-magnetic, and rust-proof, with a long service life.
Category:
Miniature bearing
I. Product Overview
Plastic ball bearings are made of Engineering plastic inner and outer rings + glass/plastic balls These lubricant-free bearings are rust-proof, corrosion-resistant, quiet and smooth-running, and lightweight, making them ideal for a wide range of applications including home appliances, doors and windows, toys, assembly lines, aquarium equipment, and small transmission pulleys. They are non-conductive, non-magnetic, and completely rust-free, ensuring a long service life.
II. Core Materials
- Inner and outer circles : POM polyoxymethylene, PA nylon, PP, PEEK high-strength wear-resistant plastics
- Rolling beads : Glass beads, PP plastic beads, stainless steel micro steel balls
- Cage : Wear-resistant nylon plastic, ensuring smooth operation without jamming.
III. Product Features
- Never rusts : Resistant to water, humidity, and acidic/alkaline environments; suitable for use in humid outdoor settings and underwater.
- Self-lubricating, no oiling required : Plastic itself has low friction, requires no lubricant, and remains clean—free from dust and oil contamination.
- Ultra-low noise : Extremely low operating noise, ideal for door and window pulleys, furniture, and smart home applications.
- Insulating, non-conductive, and non-magnetic. : Do not interfere with circuits, instruments, and low-voltage equipment.
- Lightweight : Much lighter than metal bearings, making them ideal for drones, lightweight pulleys, and small transmission components.
- Wear-resistant and compression-resistant : High-strength engineering plastic, wear-resistant, impact-resistant, and resistant to cracking and deformation.
- Corrosion-resistant : Resistant to acids and alkalis, chemicals, seawater, and moisture; does not corrode or age.
IV. Applicable Scenarios
- Door and window sliding pulleys, wardrobe sliding doors, cabinet pulleys
- Toy wheels, models, and small transmission mechanisms
- Home appliance fans, water purifiers, aquarium pumps, and small appliances
- Assembly line conveyor rollers, lightweight conveyor belts
- Medical devices, food processing machinery (hygienic, non-toxic, and rust-proof)
- Fishing gear, luggage and bag rollers, curtain track pulleys
V. Performance Advantage Comparison
- Metal bearings: prone to rusting and corrosion, generate significant noise, and are electrically conductive.
- Plastic bearings: rust- and moisture-resistant, quiet and clean, electrically insulating and lightweight, and more affordable.
VI. Specifications and Models
Commonly used miniature thin-wall plastic bearings include 608, 6200, 6201, 6900, and 6901. Inner diameter, outer diameter, and wall thickness can be customized to suit various pulleys, rollers, and shafts.
VII. Service Life
Under normal light-load conditions, it operates smoothly and reliably over the long term, with minimal wear, no jamming, and no abnormal noises. In outdoor, humid environments, its durability far exceeds that of conventional metal bearings.
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