On Mon, 11 Feb 2008 12:59:44 -0600, Louis Ohland
wrote:

I thought of making some finger clamps to pull down the V block, but
that doesn't answer how to keep things square while tightening things down.

_ wrote:

If these are the tapped and drilled blocks, could you use a
combination of your finger clamps or custom clamps pulled in by a cap
screw in the tapped holes and locating dowels in the untapped holes?
There's a clamp on my lathe saddle which looks about right, it has a
long tail to the support surface, a short clamping surface, and the
one hole for the clamp screw between, inverted of course. Something
like that sized to fit in the v block slot and rest its tail on the
2-3-4 block would work if the tapped holes were in an advantageous
location.

Then you could indicate the v blocks before and after tightening. I'm
assuming that the angle plate keeps the action vertical, and therefore
the barrel and the v blocks are square to the Z axis, and could be
indicated square to the x axis when clamping to the table. Is the
barrel untapered where it rests in the v-blocks? If so, seems like it
should work.

Pete Keillor

On Mon, 11 Feb 2008 10:45:44 -0600, Louis Ohland wrote:

_ wrote:
On Mon, 11 Feb 2008 10:18:49 -0600, Louis Ohland wrote:

I've had to diddle around trying to clamp a V block down onto a 2-3-4
block while keeping said collection square to the spindle

Actual use was drilling for a scope mount on a Stevens Favorite single
shot. I left the action on the barrel and used a Kant-Twist clamp
(w/poly jaws) to hold the action against an angle plate (keeps the
barrel lined up at right angles to the action). But I had to use blocks
to raise the v blocks high enough for the tang to clear the table (the
tang was actually down in a T slot).

So how can you clamp down v blocks onto 2-3-4 blocks and still remain
square to the spindle?
snip