Australian Woodsmith 23rd January 2019

Enlarge a Hole

Like most woodworkers, I make the occasional mistake when working on a project. Some are easy enough to fix, while others are more difficult to address.

One of the challenges I encountered recently was to increase the size of a hole that was cut too small. The location of the hole had to be exact and I knew it would be difficult to accurately centre the workpiece directly under a larger bit. To solve the problem I turned to my hand-held router and a pair of router bits.

I started with a rebating bit set to cut 3mm deep. The  bottom edge of the hole was used to guide the bearing of the bit as I routed around the entire circumference of the hole.

Then I switched to a pattern bit. With the bearing of the bit held firmly against the newly cut rebate, I was able to remove the rest of the waste from the hole (drawings above). The end result was a perfectly centred hole that’s just the right size.

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SAFETY IN THE WORKSHOP Safety devices, such as riving knives, guards on table saws and guards over router bits have been deliberately left out of the line drawings in Australian Woodsmith projects in order to make them easier to follow. It goes without saying that where safety devices have been supplied by the manufacturers you should use them. We encourage the use of push sticks as good work practice.
    Exercise vigilance and the greatest of care when using power tools, whether stationary or portable. Keep all your tools sharp and well maintained. Wear protective eyewear, a dust mask and a hearing protector when appropriate. By limiting distractions and developing safe work practices you will go a long way to avoiding workshop accidents. So, work safe fellow woodworkers.  -Editor
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