Take an ordinary pin gauge, set it by eye to what you think is the middle, and make a small 'dot' from either side. I'm sure you know this, but there is a very simple & accurate method for quickly finding the centre of a board. On thin doors with narrow stiles & rails, for example, I may place the mortises so that the panel groove doesn't remove a significant chunk of the tenons. In fact, I quite often deliberately don't centre mortises. Always marking out from the face sides & 'good' edges was something drilled into us in my 7th grade woodworking class. As you say, accuracy is more important than precision, in this context, & easily achieved by consistent setting-out. As long as you use the same gauge(s) and score from the reference side, each mortice/tenon will be marked at the same distance from the sides.ĭerek, that was an interesting challenge and an imaginative solution.
Is it accurately centred? I did three or four. It has never been critical to centre the mortice, but this method does speed up the process (even though this is all a bit tongue-in-the-cheek). or use a mortice gauge, aligning the blades with the outer edge of the imprint. Now you have a choice - either use two single blade cutting gauges to mark each line individually (you will need to set these aside for the tenon). Press done hard so that you leave a clear imprint of the chisel. Set the 1/4" mortice chisel against the centre, eyeballing it square. Now place the centre gauge between the two end lines (anywhere, it is not critical). Step #1 is to mark off the 2" length (with room to avoid blowing out the end). Marking out for a 3/4" wide stretcher calls for a 1/4" wide mortice. I found an old dovetail marker that had never worked and had been tossed into a drawer. So I looked around the workshop for something to cannibalise. Today - Sunday - I decided to build my own version. I still think that it is a terrific idea, and I must admit that the concept haunted me for some days. Then I looked at the price ($150), and that one had to pre-order now for 5 months time. My first thought was that this was brilliant - what a great, quick way to mark a mortice (or tenon) in the centre of a stretcher. Here is the link to their website for those interested: OneTime Tool - MT Center Gauge PWW1 Thanks.The other day I received an email inviting me to purchase the latest one-time tool from Woodpeckers, a mortice and tenon centre gauge. If you're interested, please click here to leave us your comments.
If there's enough demand, we may re-run some of these tools. The deadline to order yours is Monday March 4th. These new Marking Gauges are only made to order. Machined in our own shop just outside Cleveland, Ohio. Each bar is accurately engraved with an inch or metric scale. These Marking Gauges are available with a red anodized aluminum or polished stainless steel bar. Their size, shape and weight all come together to give you the control needed to make consistently accurate, razor-sharp scribe lines for your woodworking joinery. True appreciation of the craftsmanship put into these tools will be obvious the moment you hold one in your hands. And with only 3/8” of fence below the bar, interference when guiding along rabbeted edges is also reduced. With either of these fences you'll have substantially more contact area when compared with common round-head gauges. The 6” marking bar is paired up with a 3-1/2” long fence and the 24” bar comes with a 6-1/2” long fence. The fence of these marking gauges is CNC machined from billet, aircraft-grade aluminum and reamed for a perfect fit with the precision ground 3/4" diameter bar. The tail end of the bar is hollow with a threaded cap allowing for storage of extra scribe wheels and spacers. To re-sharpen simply hone the flat face to bring it back to its original sharpness. The tool-steel wheels are stationary so if you need a fresh cutting edge, just loosen the screw, rotate the wheel to a sharp section, tighten the screw and you're ready to go. You can quickly configure the scribe wheels and spacers for single or double marks spaced in 1/16” increments from 1/8” to 1/2". They're precise, extremely rigid and easy to control. Woodpeckers newest OneTime Tools are precision-machined, wheel-type marking gauges made for uncompromising accuracy.
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