Part 3 has been uploaded and he length has been shortened as I felt the first two videos were a bit lengthy.
In this part I am preparing the head for a through tenon by carefully marking the mortise. I begin my marking the outer width to obtain the centre of the head. I then mark the width of the mortise directly off the tenon.
All I do here is just make a pin prick. Then I begin all around, the bevel of the blade must always go towards the waste side as the bevel will bruise the timber and you don’t want that bruising to be on the show side. Also you compensate for the bevel by angling the blade to what you think is the bevel angle. No need to be precise in the angling just what you think is right angle will work.
Next I need to repeat the operation on the other side and to get the mortise to be perfectly centred the marking need to be accurately placed parallel to each other. A neat little trick is to place a small nick on the edge so when you flip the timber around your knife will slot itself in line with the original knife line.
When all 8-line square have been marked you need to find the centre of your mortise. This can be easily achieved my placing your ruler diagonally from corner to corner and striking a line, repeat the same on the other corners and the two intersecting lines will be the centre.
Once you find your centre grab a scratch awl and press into the timber. This pin prick will serve as a starting point for the threaded screw of your bit to go into. Placing that rick mark is easy if you use your knife to mark your lines.
If you’re going to use a round tenon then you must bore accurately another words you cannot stuff up here. If your slightly off angle, then the head will not sit flat on the shoulders of your handle. It’s a good idea to practice before actually doing it but if like you can always opt to use a drill press. I own one but I rarely use it as I can bore straight most of the time. There are days when I just lose concentration or I’m tired, stressed etc. and I stuff up so don’t feel bad if you do just keep practising and you’ll be shooting straight as an arrow.
You may however opt out completely from boring the mortise hole and just mortise it out with a mortising chisel but generally it is faster to bore out the waste and then pare to the lines.
If you want to see the visual process you can view YouTube video here.