At the same time, there is no 'breakaway friction
' [as when the bushing sticks for a second-- which is long enough hamper bobsled performance], so the bushings require only minimal lubrication." Moreover, PEEK is self-lubricating.
It can be machined to very close tolerances, providing a "perfect fit on the shaft so there is no clearance and no play in the shoe." At the same time, the PEEK bushings do not exhibit breakaway friction
and require only a minimum of lubrication, because the material is self-lubricating and will not damage the steel surfaces.
This design provides the longest stroke-to-bore ratio, zero spring rate and no breakaway friction
and constant effective pressure area.