Very few home workshops will have the need for a Semi Universal Dividing Head (the
only one widely available commercially) and will not as a result be able to justify
the considerable expense in purchasing one of these for the limited use it will get.
The shop made head seen in Photograph 1 will therefore be a possible alternative.
This can achieve all divisions up to 16 and then the following. 18, 21, 22, 24, 26,
27, 28, 32, 33, 36, 39, 42, 44, 48, 49, 52, 54, 56, 63, 64, 66, 72, 77, 78, 80, 84,
88, 90, 91,96, 98, 99.
Above this there are many more divisions possible with 100, 125, 200 and 360 likely
to be the more useful ones. Incidentally, 125 divisions, used for a dial for an 8tpi
leadscrew, is not available with the Semi Universal Head. Similarly, 96 divisions
often used in clock making.
The head can also be set up with a single gear, Photograph 2, enabling many of the
divisions to be achieved more simply.
For the detail drawings for making this head see either of my books Dividing or Milling
a Complete Course. The milling book gives more guidance about making one but the
dividing book gives all the details regarding the divisions available, as it does
for many other dividing heads.
If the viewer requires a more capable dividing head but cannot justify the expense
of a commercial item then see my Full Function Head elsewhere on my site.