Re: 3 inch boring head?
- Thanks for the responses. I wasn't too concerned with powering the boring head, I've got a 2hp 3 phase motor and boring doesn't take much power anyway because of the relatively slow speeds & small feeds.
The 3 inch just seemed like a more rigid tool since you have a larger dovetail slide. But I remember reading on another forum that someone said the 3 inch was too much for the mill/drill because too much vibration when in the offset position. Not knowing what they were using for a base under the mill that could be part of the problem. I had to build a new base that was more rigid since the one ENCO originally supplied with it seems like it has too narrow of a footprint.
--- In firstname.lastname@example.org, "Jim S." <mrjschmidt@...> wrote:
> I have had no trouble using an original Bridgeport 3" boring head on my RF-30. Remember that a boring head is single point cutting tool. I would bet the cutting load is far less than a 1/2" end mill. The only thing I had to do was add a 1/8" or so spacer at the top of the drawbar. For some reason the threads in the boring head were just short enough that the head wouldn't pull up tight. The spacer didn't affect any other tooling, so I left it on the drawbar.
> Hope this helps.
> Jim (Just a guy who likes to build stuff)