On Wed, 18 Apr 2007 14:20:21 -0400, JB MacDonald
wrote:

I know how to find the center of a pipe, using a vee block, but my
question is how do you scribe a line from one end to the other , so the
first hole is in perfect alignment with the last hole .. take for
example a 20 foot pipe , or tubing . If we had a 20 foot layout table
fine , clamp pipe down and use a height gauge to scrib a line the length
of the pipe. if you do not have a line you could get a twist(miss
alignment) but what can a person due that does not have a 20 foot layout
table . Maybe I am being to critical

I responded to this in email, but here it is for the group.

If you are using a vee block, you can place a level on the vee block
and hold it level on top of one end of the pipe. Then move to the
other end and do the same thing. Assuming you haven't moved the pipe,
you should get the holes aligned.

I just recognized you are drilling holes for elements. the above idea
or the chalkline should do you well.

Another idea would be, if you are using a drill press or a drill with
a level on it....

create your vee block to lay the pipe in to drill it. Drill the first
hole and at one end support, use a dowel or peg to hold the pipe hole
vertical. As you move the pipe along, the end support will keep the
pipe in the same position so the drill press matches all the holes.

Good luck. Let us know what method you use.

Buck
N4PGW



--
73 for now
Buck, N4PGW
www.lumpuckeroo.com