Material POM and PA have excellent mechanical strength
and wearing resistance, is suitable for manufacturing
precision plastic bearings. with good self-lubrication
performance and low friction coefficients. In addition
and high speed application. Plastic bearing made with
POM is the most extensive sort of all the plastic bearings.
Generally the inner and outer rings made with POM or
PA, Cage made with PA and the balls made with glass,
stainless or ceramic. These bearings could be used in
some al kali environment but not proper to some acid
environment.
Plastic Bearings Made With PVDF or PTFE (Anti-corrosion
plastic bearings)
As the typical type of fiuoro plastic, PTFE and PVDF
have the most excellent anti-corrosion per for mance,among
them As the typical type of fluoroplastic, PTFE and
PVDF have the most excellent anti-corrosion performance,
among them PTFE is the best of all the plastic known
to man, could be used in all the Strong Acid and Alkali
application, including HF and smoke formation H2SO4
HNO3 or HCL(98%) above). etc. and could be used in
high temperature application. PTTFE could be used
to 180¡æ and PVDF to 150¡æ. But PTFE has very low mechanical
strength, easy to be out of shape and have large Dimension
change when the temperature rise or reduce. So couldn't
be used in heavy load and high-speed occasion, Compared
with PTFE, PVDF. Has better compositive performance,
Generaly the rings and cage made with PTFE or PVDF,
Balls made with glass, ceramic or stainless
HDPE/PP/UPE Plastic bearings(Anti-Acid and
Anti-Alrali bearings)
HDPE,PP.UPE(UHMWPE)are approved can be used in faintish
acid and alkali environment (30% CuCl2 solution and
30% NAOH solution is tested ok).Such bearings can
operate in liquid and contamination sensitive environments
as acid/alkali/salt/imprequant/oil/gas/seawater.have
general performance of lubrication and maintenance
free, none magnetism,anti-rust and eroded of plastic
bearings.But these bearings have not strong mechanical
strenth.and easy to be out of shape,so couldn't used
in heavy load and high speed aplication.amony these
3 material,UPE more excellent strength and low friction
and could be used to lower temperature(lowest to -150¡æ),
Generally the rings and cage made with HDP.PP or UPE,
balls made with glass stainless or ceramic
PEEK/PI Plastic Bearings (High temperature
application plastic bearings)
As newly developing engineering plastic material,
PEEK and PI have been approved have the strongest
mechanical strength and could endure the highest temperature
among all the plastic material. PEEK could work at
260¡æ and PI at 300¡æ in long-term. Moreover they have
excellent.anti-corrosion performance could be used
in strong acid and alkali environment. So generally
they are used to manufacture bearings 5 to realize
precision running in rigor environment. As the material
is expensive, the costs are high. Generally the rings
made with PEEK or PI. Cage with PTFE, PEEK or PI and
ball with ZrO2 or Si3N4.
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