From: Harvey J. Karten
Date: April 2, 2005
Content: New chainplate and backing plate for Tayana 37

These photos show the form and dimensions of one of the new chainplates and the external 
backing plate. The location of the bend in the chainplate and the angle of bend 
duplicate that of the original chainplate. The bend was done as a "cold-bend" to minimize 
material stress.

The material is 316-L stainless. Thickness of 
chainplate is 3/8". Thickness of backing plate is 1/4". Bolts are 3/8" 316-L Stainless. 

The hole pattern was exactly the same as that of the original chainplate. 
The portion of the chainplate that is likely to be exposed to saltwater and the 
elements was highly polished. The head of each bolt was made smooth with a grinding wheel 
and polished on a buffing wheel using red rouge. Caution was exerted to prevent the 
bolts from overheating when grinding and when polishing. (I used my fingertip as a precise 
thermal gauge! If it was getting too hot to touch, I let it cool down. I guess that was 
between 120-150 degs F.)