============ Subject: Re: Vertical Mill From: Robert Bastow < teenut @ hotmail.com> Date: Thu, 13 Jan 2000 04:16:49 GMT It does have a slightly different geometry then the ubiquitous Knee Mill .
The vertical saddle takes care of Z and Y movements, the spindle ram takes care of the X and also has a moveable quill on the vertical spindle for sensitive drilling.
Variable power feeds are available on Z and Y. The work tables are bolted onto the vertical sadle and can be loosened and slid from left to right without loosing register..thus giving surprisingly more working width than appears at first sight.
Two kinds of table are available..the plain table..simply a large, tee-slotted angle plate, or the Universal table which tilts and swivels in both axes. The drive is all geared from a 2 HP 2 speed motor and all the gears are robust, hardened and ground..even at top speed there is little gear noise Bearings are my favorite type!!! Tail end of both spindles runs in pre-loaded ABEC 9 angular contact bearings while the front end is a hardened and ground cone running in a bronze bush with forced oil feed.
These types of bearings can be readily adjusted (axially) to give virtually zero end and side play.
IMHO the very best bearing arrangement for a precision machine tool.
BTW The Myford Super 7 is fitted with an identical arangement!! As was my Smart & Brown Toolroom Lathe.
Read more about Sadle : The work tables are bolted onto the vertical sadle and….: