Plastic bearing POM 638 Glass Ball 8X28X9 mm

NZ $5.50 +GST each

In Stock Now

SKU: 42082809360

Plastic bearings are commonly used in application where it requires exposure to water, chemical, or electrical (insulated) environment. This type of bearing does not require any oil lubrication as it self-lubricates. This type of bearing is also low noise and has longer life span.

This 8 x 28 x 9 mm (POM 638) bearing is a plastic bearing with Glass ball . The POM 638 inner diameter is 8 mm, the POM 638 outer diameter is 28 mm, the POM 638 width is 9 mm.

Here are some characteristics of PP and POM plastic bearing that might give you an idea of which one is more suitable for your application.

Polyoxymethylene (POM)
- higher strength, greater hardness
- higher thermal stability
- wear resistance
- suitable to be in contact with food type applications
- resistant to weak acid and weak oxidant
- anti-rust

Polypropylene (PP)
- good corrosion resistance
- high mechanical strength
- high wear resistance
- strong anti-adhesion ability
- great electrical insulation
- good resistance to high radiation
- anti-rust

Example applications:
Mechanical, electrical, hospital equipment, food machinery, furniture and building materials

Note that this bearing comes with both sides sealed. If you require both sides open, you can simply remove the seal. For bulk orders of open sealed type, please email us.


Bearing Model: POM 638
Also Known As: POM 638 with glass balls, 638-2RS Acetal bearing
Inner Diameter (d): 8 mm
Outer Diameter (D): 28 mm
Width (B): 9 mm
Inner Diameter (d): 0.3150 inch
Outer Diameter (D): 1.1024 inch
Width (B): 0.3543 inch
Material: Acetal Plastic (POM)
Ball Material: Glass
Cage Material: Nylon 66 - PA66
Closures: Sealed Both Sides