| 摘要 |
<p>A member of a precision friction pair of two members comprising a tubular housing and a plunger adapted to move in said housing, the two members having respective matching friction surfaces. The member has a polymer coating forming its friction surface, which surface complies to a predetermined diameter tolerance and to a predetermined surface roughness. The member is manufactured from a blank with deviations of diameter at least an order of magnitude larger than the predetermined tolerance and with surface roughness at least an order of magnitude larger than the predetermined roughness, while the predetermined tolerance and the predetermined roughness of the friction surface are provided entirely by the polymer coating.</p> |
