I tried to make a ZCI for my r4512 table saw. But could not get the fit just right.
So I purchased a leecraft zero clearance insert. This insert is fine, it does what is should for zero clearance.
However, it has the same problem as the steel insert that comes with saw.
The top of the insert sits a little lower than the table top. About a 32nd.
Tried to use washers to adjust height, but still too low. If insert is raised to high with washers,
the screws used to secure it are above the table top and cause scratches on wood. Used a
counter sink to lower the screws, but still can’t get the ZCI flush with top.
Not a problem most of the time.
But when cutting slots, rabbets, tenons, etc. the height of the blade/ZCI/table can still be off.
Also, for shorter pieces they can rock as they move past the table and are on the insert only.
This LJer made a ZCI for this saw. http://lumberjocks.com/projects/57777. It does appear to be flush with the table.
However, it doesn’t look like he screwed it down. It is just sitting on the table.
Has anyone had experience with set this up. What can I do to make the ZCI flush with the table top?