I ve found very few instances of needed to counterbore the underside of a bench for holdfasts and i ve tested a variety of holdfasts in benches from 2 to 6 inches thick.
Bench dog holes template. Now clamp the 2 4 on edge to your benchtop and use the plumb holes as an oversized doweling jig to guide your auger bit. Bench dogs are a work bench accessory used to clamp work down to the table or used as a stop when planing or sanding a piece. To drill the holes in the two opposing face vises and the holes in the bench between the vises i had to make a second jig. But i m stumped as to how to enlarge the holes in the perf board.
Drill through the 2 4. Used well your bench is an all in one three dimensional clamping solution that will allow you to hold your work on any of its edges or faces. To drill the dog holes between the two face vises i built a second jig. Made from high speed steel they are.
The spacing and measurements on this one were completely different from the first but the principle was exactly the same. If memory serves they are 1 4 diameter holes that i need to drill out to 1. These marks should be aligned. If your entrance and exit holes both hit the mark the hole is plumb.
For drilling the dog holes lee valley offers 3 4 07j02 48 33 and 20mm 07j16 20 35 drill bits that are 6 long overall with 3 5 8 of fluting enough to go through the jig and a 2 thick bench top. The lipped brad point style scores the perimeter of the hole for clean entry and smooth sidewalls. They can also be used as standoffs to keep work elevated off your workbench. I have all the parts and pieces.
Join my mailing list get on the fast track to the woodworking content you really like by joining my list and telling me what you most want to see in video text song poetry and performance art. How to drill perfectly vertical bench dog holes in your workbench a woodworking bench is more than just a table to lay your tools and project parts on.