BullseyeBore Core - Worksurface Extension Plates
BullseyeBore Core Worksurface Extension Plates are an optional accessory in the BullseyeBore Core ecosystem.
A BullseyeBore Core Worksurface Extension Plate is a flat aluminum circular plate that can be either held in place or tacked in place on the flat worksurface to “extend” it so the worksurface patterns are fully visible. Worksurface Extension Plates “extend” a small worksurface so the Reference Pattern and at least one Alignment Pattern is visible.
The plate has 6” diameter with the BullseyeBore logo on one side and nothing on other.
The simplest way to utilize a Worksurface Extension Plate on a small worksurface is to position it flat on the worksurface so that the intended drill bit hole is positioned within center of the open Worksurface Extension Plate hole. You can optionally use your free hand to hold the Worksurface Extension Plate in place prior to and during drilling operations, or the Worksurface Extension Plate can be tacked onto the worksurface prior to and during drilling operations. In any drilling operations, it is critical for safety purposes to always keep your hands clear of the drill bit while using BullseyeBore Core. Always read and follow the BullseyeBore Core Safety Guidelines before attempting to use BullseyeBore Core or any BullseyeBore Core accessories on a drill or in an actual drilling operation.
In the two images below, the Worksurface Extension Plate is held in place by a free hand. This can be somewhat challenging if you must also hold the workpiece itself in place (as was done in the images). Please note that for safety purposes the free hand holding the Worksurface Extension Plate should be positioned far from the drill bit and protected by a glove. Always remember that safety is critical when using any power tools such as power drills.
Core Green Extended with a 6” Worksurface Extension Plate
Core Red Extended with a 6” Worksurface Extension Plate
Instead of using your free hand to hold the Worksurface Extension Plate in place, it may be alternatively tacked or nailed flat onto the worksurface. This is the recommended procedure for using a Worksurface Extension Plate. Each Worksurface Extension Plate contains eight small holes that can optionally be used with tacks or nails to hold the Worksurface Extension Plate flat in place against a vertical, horizontal, or angled worksurface.
In the following video, the Worksurface Extension Plate is tacked to the high point of the 2x4. Remember that most wooden boards typically have some width-wise camber or curvature, and you must take that into account when positioning the Worksurface Extension Plate. In this video the Worksurface Extension Plate was tacked to the width-wise camber of the 2x4.
The accuracy of any hole drilled with BullseyeBore Core in conjunction with a Worksurface Extension Plate is always dependent on 1) the correct use of BullseyeBore Core, and 2) the correct mounting of the Worksurface Extension Plate with regards to the orientation of the worksurface. If the Worksurface Extension Plate is not perpendicular to the worksurface, then the resulting drill hole will not be perpendicular with regards to the worksurface.
