I wanted to make a center height reference tool and needed the dimension.
In the process I discovered that Google does not know what that distance is so I measured it using a method shown by Joe Pieczynski on YouTube (search for "setting lathe tools on center" if you have not seen it). I used a parallel bar between the pin in the chuck and the pin on top of the gage block stack set on the flat part of the ways then swept the parallel across.
I came up with the spindle center height 117.152mm / 4.6228" measured from the flat part of the ways to the spindle center.
I would appreciate if a few SB9 owners verified my result.
I realize the wear on various machines and measurement errors will result in slight variation but I think it would be an interesting exercise to compare results.
In the process I discovered that Google does not know what that distance is so I measured it using a method shown by Joe Pieczynski on YouTube (search for "setting lathe tools on center" if you have not seen it). I used a parallel bar between the pin in the chuck and the pin on top of the gage block stack set on the flat part of the ways then swept the parallel across.
I came up with the spindle center height 117.152mm / 4.6228" measured from the flat part of the ways to the spindle center.
I would appreciate if a few SB9 owners verified my result.
I realize the wear on various machines and measurement errors will result in slight variation but I think it would be an interesting exercise to compare results.