Re: Misaligned Rail Assy Holes
Posted: Fri Aug 15, 2025 1:41 pm
dusty,
I know you like dimensions, but these pictures may help in understanding. I only have the more recent Mark V 510 Tables (bottom picture) so the early ones are pictures I have found. Thus, I cannot provide those dimensions.
The first Mark V 510 Table System that came out in 1985 had the Fence Rail Tubes with mounting holes drilled through the front and rear of the tubes. The mounting holes in the Table were threaded holes. This is the type of Table the OP was trying to upgrade to a 520. In the OP's picture you can barely see the mounting hole position between the scales around 1-1/2" to 2" which is offset from the 520 Rail center mounting hole just past 2-1/2". In the picture below the red arrow indicates the location of the center mounting hole for those original tubes.
_ .
It is the location of the center mounting hole that changed for some reason. When the Fence Rail Tubes changed their mounting from screws to attached threaded studs the center mounting hole was moved to the right. The picture below shows the original center mounting hole indicated by the red arrow and the new center mounting hole indicated by the blue arrow.
_ .
Later the Table changed again no longer having the spot for the original center hole. This Table has the center mounting hole as indicated by the blue arrow in that later, to the right, position of the original spot.
_ .
Other differences in the tables made since their introduction is at some point the Tables changed from Shopsmith Gray to black paint. The area around the Table Insert has ribs (pictures 1 & 2 above) while the later Tables have the smooth surface (picture 3 above) around the Table Insert. The Table in the third picture above is from a 1998 Crafter's Station having the smooth surface around the Table Insert.
I know you like dimensions, but these pictures may help in understanding. I only have the more recent Mark V 510 Tables (bottom picture) so the early ones are pictures I have found. Thus, I cannot provide those dimensions.
The first Mark V 510 Table System that came out in 1985 had the Fence Rail Tubes with mounting holes drilled through the front and rear of the tubes. The mounting holes in the Table were threaded holes. This is the type of Table the OP was trying to upgrade to a 520. In the OP's picture you can barely see the mounting hole position between the scales around 1-1/2" to 2" which is offset from the 520 Rail center mounting hole just past 2-1/2". In the picture below the red arrow indicates the location of the center mounting hole for those original tubes.
_ .
It is the location of the center mounting hole that changed for some reason. When the Fence Rail Tubes changed their mounting from screws to attached threaded studs the center mounting hole was moved to the right. The picture below shows the original center mounting hole indicated by the red arrow and the new center mounting hole indicated by the blue arrow.
_ .
Later the Table changed again no longer having the spot for the original center hole. This Table has the center mounting hole as indicated by the blue arrow in that later, to the right, position of the original spot.
_ .
Other differences in the tables made since their introduction is at some point the Tables changed from Shopsmith Gray to black paint. The area around the Table Insert has ribs (pictures 1 & 2 above) while the later Tables have the smooth surface (picture 3 above) around the Table Insert. The Table in the third picture above is from a 1998 Crafter's Station having the smooth surface around the Table Insert.