Liner effect of the ring sets
In the field of valve applications, bushings within the valve cover,
wrapped stem, the general composite bearing PTFE or graphite and other
corrosion-resistant materials, used for sealing.
supplement
Role: protection of the shaft, seat hole, no hair bushing automotive
wear and tear; shock absorption, noise reduction; reduce the reduction
of disassembly and maintenance;
Material: An imported THORPLAS can be considered under;
Use: no grease, dry running;
Installation: interference fit
Added: Oil-free bushing, as its name implies, without lubricating oil
and grease, JDB graphite copper in the use and maintenance convenience,
cost savings, time and cost;
Several types:
There are many markets now, there are three main types:
1, the metal substrate, usually copper and lead, the surface of the
hole, the hole to add grease; rely on the hole a lot of grease support
operation, in fact, a long time also need to refuel;
2,
composite bushing, one is the steel back + copper + PTFE Teflon, the
other is the steel back + copper + POM POM; are pressed into shape; by
lining material to achieve operation, but very Thin, fragile, unbearable when stressed
3, non-metallic self-lubricating bushings: real self-lubricating; nylon, PTFE, as well as race dragon
Oil-free bushing that white is the improvement of the copper sleeve,
when the design, if the light load we will choose copper sleeve and
oil-free bushing,
Nowadays
most oil-free liners are steel plates with sintered spherical bronze in
the center and other surfaces coated with a mixture of
polytetrafluoroethylene (PTFE) and lead. Friction coefficient is small, wear-resistant to engage in good corrosion and oil-free lubrication features. Used for a variety of mechanical sliding parts, such as printing presses, textile machines, fitness machines, hydraulic trucks. Some bushings are specially engineered to handle high-speed sports but can not afford heavy loads.
Oil-free bearings in general when I design are low-load low-speed use about 1000 rpm.
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