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Tel: +86-021-3636 2892
M:    +86-186 218 20086
Fax: +86-021-6305 1741
E-mail: jeff.z@shcosmolink.com
Add: Room 503, XieTu Road NO.788,Luwan District,Shanghai,China
 

Miniature Bearing

For show case, chest freezer caster wheels

Main Components:
Internal ring, Outer ring, Rolling Element,

*lubricant and seal ring for sealed bearing

Working Condition:
Radial load, Axial load, Speed, Radial runout, Axial runout.
 

Type of Bearing:
Ball Bearing / Roller Bearing
 
*Kindly advice the bearing designation to us, such as 618, 619, 602zz, our sales engineer will let you have the detail information.
 
Type
Description
Friction
Stiffness*
Speed
Life
Plain bearing
Rubbing surfaces, usually with lubricant; some bearings use pumped lubrication and behave similarly to fluid bearings.
Depends on materials and construction, PTFE has coefficient of friction ~0.05-0.35, depending upon fillers added
Good, provided wear is low, but some slack is normally present
Low to very high
Low to very high - depends upon application and lubrication
Rolling element bearing
Ball or rollers are used to prevent or minimise rubbing
Rolling coefficient of friction with steel can be ~0.005 (adding resistance due to seals, packed grease, preload and misalignment can increase friction to as much as 0.125)
Good, but some slack is usually present
Moderate to high (often requires cooling)
Moderate to high (depends on lubrication, often requires maintenance)
Jewel bearing
Off-center bearing rolls in seating
Low
Low due to flexing
Low
Adequate (requires maintenance)
Fluid bearing
Fluid is forced between two faces and held in by edge seal
Zero friction at zero speed, low
Very high
Very high (usually limited to a few hundred feet per second at/by seal)
Virtually infinite in some applications, may wear at startup/shutdown in some cases. Often negligible maintenance.