Jerry Davis wrote:
> 
> My unmarked example has: 11" shaft length, 7/8" shaft diameter and the
> arm reaches 7.5" from the shaft.  Here it is in beautiful primer red:
> 
> http://smilax.griffin.uga.edu/~jdavis/holdfast.jpg

Some rummaging in the book pile gives

1935, Buck & Hickman
pillar length x diam
10 x 3/4
12 x 7/8
14 x 1
16 x 1 1/8
18 x 1 1/4

1935, Buck & Hickman

Woden (not shown in catalogue, but I recog nise the model #)
Labelled as reach, opening, diameter of hole for collar
X110,   5 7/8,   6 7/8,    1 1/2
X111,   7 1/16,  7 5/8,    1 3/4
X112,   8 5/8,   9,        2

 From a previous post, my X110 has a 3/4 shaft.
Those collars are a good deal bigger OD than ID.

Sounds like my big 'un is a littl'un by
old standards! Mine is the 14 x 1...

    BugBear

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