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If you use our Invar System as a scale extension tool, you may need the 803-1 V-block kit.  These V-blocks  work with our Invar System to provide quick access to shafts from 1-1/2" to 48" in diameter.  A spring-loaded steel mounting rod ensures postive contact with the shaft below.  The length of the rod is not manufactured to a precision length but is meant for relative "X" or "Y" measurements on rolls.  The 803-1 is a kit consisting of both V-blocks, but each V-block may also be purchased individually (see table below).  You can see other Invar System Components on this website.

 

Model Description Fits 803-1 803-2 & 803-3 V-blocks with case 1-1/2" - 48" dia. rolls (38mm - 1.2m) 803-2 120° V-block with case 1-1/2" - 15" dia. rolls (38mm - 38cm) 803-3 160° V-block with case 12" - 48" dia. rolls (30cm - 1.2m)