PTFE
Rod is often chosen to produce bearings because of its very low
friction and also for its free running ability. Because of its ability
to conform to shape otherwise known as flow, PTFE Rod is used for seals
in valves, this is because it can conform to shape and create a high
specification valve seal. PTFE Rod can easily be machined but due to the
surface softness, care must be taken in lathe jaws or high compressive
loads, which may cause distortion. Another important element to remember
regarding PTFE Rod is the coefficient of expansion due to heat changes;
this can be uneven with PTFE and may cause distortion in components.
Specifications:
PTFE
Rod is manufactured in two distinct ways, extruded PTFE Rod is the most
popular and is relevant to smaller sizes, Moulded PTFE Rod is relevant
to the diameters over 100mm in size, smaller sizes are also available in
extruded form.
(a) Sizes Availabe,
-Extruded Rod Min. Diameter= 5mm, Max. Diameter= 150mm,
Length= normal 1 m, or according to customer's request
-Moulded Rod Min. Diameter= 5mm, Max. Diameter=300mm,
Length: Max. 300mm
(b) Extruded Rod Diameter 4~9mm made from dispersion PTFE resin; Diameter 10~50mm made from dispersion PTFE resin