jam nut

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Leveling Insert Plates

I wasn't satisfied with the way the sacrificial insert plates sat in the recess on my drill table. My original plan was to use 3/4" MDF plates, the same width as the top layer of the table. As I later discovered, not all 3/4" MDF is the same thickness. I'm not sure if it's variation between sheets, or that the smaller pieces of the MDF are less stable with temperature and humidity variations. No matter the cause, I couldn't get new plates flush with the surface of the table without a lot of material removal -- even then it wasn't perfect.

I decided that the only way I'd get the plate level was to build some sort of leveling system into the table. After weighing the options I decided to use screws and jam nuts. Read more »

Tools: drill press

Tags: jam nut, leveling

Materials: MDF