Bridgeport Mill Question

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?
Thank you
Robert Then
Reply to
Robert Then
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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!
Harold
Reply to
Harold & Susan Vordos
Check out KB Electronics, their inverters will run a 3 phase on single phase. I've been using one for over three years without a hiccup.
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Rex the Wrench
Robert Then wrote:
Reply to
Rex the Wrench
On Tue, 16 Dec 2003 05:29:35 GMT, Robert Then put forth the notion that...
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 converter:
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Checkmate
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Reply to
Wwj2110
[posted and mailed]
"Robert Then" wrote in news:3LwDb.464958$ snipped-for-privacy@bgtnsc04-news.ops.worldnet.att.net:
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
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TECO Westing House units are great value.
Also, for you Bridgeport fans, be sure to order the catalog from High Quality Tools,
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great supplier of OEM Bridgeport parts and their catalog has an exploded parts list for the Step Pulley and the Variable Pulley machines.
Marty
Marty
Reply to
Marty Escarcega

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