One of the problems I faced in my present project was the inability to drill straight through a 4x4 inch block of lumber. I started off on one side in the center but when I ended up on the other side the hole was off center very badly. One option is to use a drill press/stand or take the block to someone with a drill stand. I wanted to do this at home and finally got to do it reasonably correctly.
To do so place the drill horizontally on your work table. Thus one axis will always be straight. Now make sure that during drilling you are perpendicular to the edge of the table. This minimizes movement on the other axis.
While drilling your drill now is stable horizontally. As long as the perpendicular direction is maintained (you can also draw a line on the table to facilitate this) there will be minimal left and right shift. The wood piece has to be clamped such that the point being drilled is exactly at the right height for the drill placed on the table.
Using this method I have been able to drill fairly centrally in 4x4 lumber without a drill press. It will not be very accurate, but far better than just eyeballing the whole process.
To do so place the drill horizontally on your work table. Thus one axis will always be straight. Now make sure that during drilling you are perpendicular to the edge of the table. This minimizes movement on the other axis.
While drilling your drill now is stable horizontally. As long as the perpendicular direction is maintained (you can also draw a line on the table to facilitate this) there will be minimal left and right shift. The wood piece has to be clamped such that the point being drilled is exactly at the right height for the drill placed on the table.
Using this method I have been able to drill fairly centrally in 4x4 lumber without a drill press. It will not be very accurate, but far better than just eyeballing the whole process.
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