I have just acquired a bridgeport mill. Is the quill supposed to retract
when the lever is released (like on a drill press) ?
Also what do people recommend for converting single phase power to 3 phase?
No, the quill should stay where you stop it, although the weight of the
handle, which is easily relocated, may influence it slightly. You want as
much "feel" as possible in the quill of a "drop spindle" mill like a
Bridgeport, for you rely on your sense of touch to drill tiny holes without
breaking the drill.
Static phase converters work fairly well for fixed loads, but you give up
some horse power. That can be a serious issue if you use your mill to
capacity. You're going to hear from lots of guys that have rotary phase
converters in their shops, many of which can provide the necessary
information to build your own. I have three phase service so it's never
been a consideration for me.
Good luck with the new (to you) mill!
On Tue, 16 Dec 2003 05:29:35 GMT, Robert Then put forth the notion
Here's a converter I build and sell on eBay. It works very well with my
own Bridgeport 2 HP J-head. You can use it as a static or rotary
[posted and mailed]
"Robert Then" wrote in
The spring does not retract the quill on a Bridgeport. It counterbalances
it. It should theoretically not move from where you set it. If you have a
1hp motor, go buy a VFD from
House units are great value.
Also, for you Bridgeport fans, be sure to order the catalog from High
great supplier of OEM Bridgeport
parts and their catalog has an exploded parts list for the Step Pulley
and the Variable Pulley machines.