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Surface finish is an important parameter that affects wear, friction, oil retention in engines and compressors, and fluid flow.  C-K Engineering has
developed a family of bore replicator systems that can be used for industrial (SEE 3-D®i, 0.370” - 1.031”) and automotive (SEE 3-D®a, +2 3/4”)



The key to the replication process is a two-part silicon rubber compound, that can replicate structures as fine as 0.1m.  The compound starts as a
thixotropic liquid that is applied to the replicator apparatus which is inserted into the bore to be replicated.  This process takes about 12-15 minutes. 
After completely curing, the finished replicate can be removed and analyzed.

Analysis is performed with an optical microscope, an interferometer.   Both replicator systems include a low cost interferometer.

Additional References:


  1. Blunt, Liam and Jiang, Xiangqian, Advanced Techniques for Assessment Surface Topography, Kogan Page Science, 2003
  2. Hill, Stephen H., Kantola, Troy C., Brown, James R., and Hamelink, Joseph C., An Experimental Study of the Effect of Cylinder Bore Finish on Engine Oil Consumption, SAE Paper 950938
  3. Ohlsson, Robert, Rosen, Bengt Goran, and Westberg, John, The Interrelationship of 3D Surface Characterisation Techniques with Standardized 2D Techniques, Advanced Techniques for Assessment Surface Topography, Blunt & Jiang (eds), Kogan Page Science, 2003
  4. Raffy, J. C., Evolution of Surface of Spur Gear Teeth, Surface Roughness Effects in Lubrication, Dowson, Taylor, Godet, Berte (eds), Proceedings of the 4th Leeds-Lyon Symposium on Tribology, Mechanical Engineering Publications Limited, London, 1977
  5. Schmaltz, G., Technische Oberflächenkunde
  6. , Springer-Verlag, Berlin, 1936
  7. Sealed Power Corp., A Study of Typical Bore Finishes and Their Effect on Engine Performance, Muskegon, MI, 1969