开云体育

Hello Allyn,
I am starting to make such an attachment on my Unimat 3 (it is no longer manufactured).
The two collars or end plates must be bored/made simultaneously with one edge straight or the intended accurate alignment will not be achieved. I would buy it if it was available somewhere. It should not be that difficult to make, only it does require some accurate layout of componrents and fits.
The following descriptions have been received or found (the idea is definitely useful to the Unimat DB/SL , which also has a limited quill movement range):

From the Hemingway product leaflet I found comes the following description:

揊rom many reports received there is no doubt that, with one exception the Vertical Drilling & Milling Attachment is a most useful accessory. This one exception is that upon raising/lowering the head then radial position about the Column is lost.

We offer our alignment device which is supplied complete and ready to fit to the column. The Drilling/Milling Head may now be raised/lowered without loss of radial setting. We include a special Clamp Handle which can be positioned to best suit the user. A quick half turn is all that is needed to Clamp or Raise the Head allowing easy and free vertical movement along the column.

Should it be desired to rotate the Attachment around the Column then easing of the single clamp screw found in each the 2 Plates holding the guide Bar is all that is necessary. Thus none of the versatility of the Drilling/Milling Attachment is lost by fitting of this accessory. Where applicable parts are supplied black anodized.�


From the October 1993 issue of Engineering in Miniature in the 揙n the Shelf� section
comes the following product description:

VERTICAL ALIGNMENT DEVICE
This accessory is available for the Unimat 3, Compact 5 and Toyo milling columns.
Its purpose is to eliminate the tiresome restrictions imposed by the limited length of the quill stroke. By fitting this accessory the milling head may be raised or lowered the full length of the machine column without the loss of radial position. Two collars and a precision ground guide bar form the basis of the accessory. A new clamp, eliminating the Alien cap screw, is also provided, making adjustment of the milling head more convenient. The vertical alignment device allows the operator to clamp the milling head at any radial position around the column and the head may also be swiveled for angular drilling and milling.


From Brian Symons in Australia comes the following description:

There was a collar mounted at the top and bottom that the column went
through and with a piece protruding a little on one side. A vertical rod
mounted into the protrusion went between the two and the column height
adjustment (cap bolt / nut) was replaced with one that had a vertical hole
in it that the rod went through. As a result, any height change had to
be pretty close to vertical.

Geoff Grosguth