Pivot boring head

[klank]

I have been given a new pivot boring head (Soba) - currently on offer by a well known supplier.

Never having had a boring head before I wondered if there is anything to watch out for re. the "pivot" or its setting up?

Does anybody have experience of this type of head?

My first job is to bore a 1/2" hole out to 3/4" in cast iron - 1 1/2" thick in my mini-mill.

I have a set of 3/8" tipped boring bars and intend to use them in the head - although the pivot head as supplied comes with a couple of lengths of 3/8" tool steel - one drilled/tapped with grubscrew at an angle at the end to take a very slim tool bit. (steel for this is also supplied).

[Noddy]

I haven't a clue, but by getting this to the top of the list, it might find a kindly soul who does have a clue.

Keith

[klank]

Thanks for the kindly thought Keith

[petercolman]

I have no experience of this particular model, but in general the idea is to set the tool up as you would in a lathe (ie on centre) and using as rigid a set up as possible, use power feed if possible and be patient. If I can help more send me more details.
Peter

[havoc]

Anyone got a picture or link to a picture so I know what this is about?

[steam4ian]

G'day John.

Thanks for the picture because I was wondering too. That device looks like it would be good for boring around corners. ;D

I was wondering if it a head with the tool holder pinned eccentrically such that all axes including the main rotation were parallel. Rotating the tool holder wrt the body would alter the bore diameter.

Regards,
Ian

[circlip]

Don't knock it, it's a bit like a Fly cutter, the mass is kept central to the spindle rather than overhung like the dovetail slotted version. I've only used one a Looooong time ago in a Galaxy/Toolroom far far away, and can only remember using it for relatively small bores due to ARC of adjustment. Cut well,SHARP tools an all that.

[klank]

Thanks for the replies folks.
The photo kindly posted above is the boring head I have been given.
The head can be wound across like a "normal" boring head, but the tool can be pivoted as well.
I substituted the supplied tool with a standard (tipped) boring tool and "practiced"on a few pieces of steel. It seems important to adjust the pivot so that the standard boring tool is vertical to the axis of the mill.
I am assuming the pivot can be brought into play to extend the diameter of the cut when using the tool set-up as shown in the photo?