POM Plastic Bearing Balls, 4.5mm-30mm Metric Coin Ring Making, 1-100pcs, Durable Smooth for DIY Crafts and Industrial Use(9mm 5pcs)

Description

• Multiple sizes to choose from - providing different diameter specifications from 4.5mm to 30mm, meeting various needs such as DIY handicrafts, coin and ring making, industrial accessories, etc.
• High quality POM material - made of high-precision POM plastic, with a smooth surface, wear-resistant and durable, ensuring long-term stable use.
• Widely applicable - suitable for various scenarios such as handmade production, model accessories, bearing replacement, toy modification, etc., flexible and practical.
• High cost performance set - each containing 1-100 units, choose according to your needs, affordable, suitable for individual or bulk purchases.
• Precision craftsmanship - Each plastic ball has precise dimensions and uniform roundness, ensuring smooth rolling and stable performance.

Description:
POM plastic (also called Polyformaldehyde) is a tough material with a low coefficient of friction and high abrasion resistance.
Excellent wear-resisting and self-lubricating than any other engineering plastics, pom balls are suit to working between -40 to 130 for long time.
Used in applications such as drawer slides, precision bearings, pumps and valves, check valves, flow meters, and measurement instruments that operate in aggressive environments.
Specially useful for bicycles, casters, drawer slides, door locks and many other applications.
Suitable for a range of purposes, some of the most common are listed below:
1/8" is often used for clusters and old English-style headsets
1/4" is often used for rear wheels and bottom brackets
3/16" is often used for front wheels
5/32" is often used for headsets with pressing cups
Specification:
Tolerance: +/-0.02mm
Material: Polyoxy-Methylene (POM, Acetal, Polyacetal and Polyformaldehyde)

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