On Sat, 17 May 2008 08:50:57 +0100, Mark Rand
wrote:

What's the diameter of the toolpost? The pictures in the Atlas manual seem to
indicate a rather narrow slot in a reasonably sized post. For comparison,
mine's got a 5/8 slot in a 1 1/8 post. That's verging on too wide for the
post, but it's what it came with. It should be possible to push the toolpost
out of the back of clapper and make custom holders to bolt to a "top-hat" nut
made to fit in the back of the clapper. This is a good way to get a more rigid
design for a long overhang keyseating tool, hacksaw or similar.

Mark Rand
RTFM
=============
As measured with "verynear" calipers

Clapper block is
0.755 thick
1.740 wide
2.710 high at widest part

tool post
top hat "brim"
1.180 diameter
0.130 thick

body
0.995 diameter

slot width
0.430 inches

Your suggestion to make a "nut" to fit the clapper block to allow
tool holders to be bolted to the face of the clapper block is a
good one. I even have a piece of salvaged pump shaft that should
be ideal material.

Most likely I will loctite a stud into the clapper "nut" and use
a flange nut to retain the holders, possibly with the addition of
an offset pin or SHCS to prevent the "nut" from turning when
clamping. After a closer examination of the clapper block there
is very little space for any drilled/tapped holes for straps. I
don't know if this is "standard" but the clapper block also has
set/grub screws to prevent the "tool post" from turning and a
set/grub screw in the clapper frame into a dimple in the clpper
block to lock it in place.


Unka' George [George McDuffee]
-------------------------------------------
He that will not apply new remedies,
must expect new evils:
for Time is the greatest innovator: and
if Time, of course, alter things to the worse,
and wisdom and counsel shall not alter them to the better,
what shall be the end?

Francis Bacon (1561-1626), English philosopher, essayist, statesman.
Essays, "Of Innovations" (1597-1625).