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Finding the center of cedar block
6 replies to this topic
Posted 20 August 2009 - 07:13 AM
I am working with 7/8" X 7/8"X 2.5" wood blocks and am having trouble putting a centerline on the block to mark for eye holes. When I drill my eye hold they are always a little off. I am using a drill press and clamps so I think the problem is me.
Part of this is due to my eye problems and part of it is me being green with woodworking.
Does anyone have any tricks or tips on getting a centerline down the length of the block?
When I finally do get one close to perfect I would like to make a jig or template out of Plexi-glass (or something) to repeat the locations.
Thanks in advance.
Posted 20 August 2009 - 07:25 AM
Heres a link to a classic centering jig, this jig is for marking center down the length of the stock: (click the image)
there are other teks and jigs for marking center on the face/endgrain.
Posted 20 August 2009 - 07:28 AM
This is not an original idea, in fact, I am sure it has been documented on TU in the past.
Make a base plate with a pointed pin. I use 18mm ply wood and a sharpened 3mm dia brass rod for the pin. Make the plate size so that it can be comfortably clamped to the drill press plate/shelf, mine is about 8x8.
Place the pin plate on the drill press shelf. Lower the drill to the pin, align them as best you can and clamp the plate using an F or G clamp.
On the lure blank, make an indentation at the entry and exit points. I make a shallow hole with my dremel for this.
Place one end of the blank on the pin and drill half way through. Reverse the blank and repeat.
Works every time.
Note if you are going to try and drill through with a 1/16 dia bit, you can expect problems, as the bit flexes and will follow the path of least resistance and follow the grain. Personally, I dont use anything less than 1/8 dia bits, but that is just me.
Posted 20 August 2009 - 10:15 AM
You can use carpenter's scribes, or a drafting compass.
Set the width close to half way, pass it down one side, and then reverse the blank and do the other. If it's not dead center, the space between the two lines will be.