Re: How should I make this?
- From: "mark@xxxxxxxxxxxxxx" <mark@xxxxxxxxxxxxxx>
- Date: Sat, 29 Mar 2008 14:47:14 -0700 (PDT)
On 29 Mar, 21:29, "Ian" <elanma...@xxxxxxxxx> wrote:
I need to make several 'Top Hats' out of stainless steel, below is a sort of
cross section in my first attempt at ascii art.
The part is about 45 diameter and 45 long and will have a wall thickness of
1.5mm thick. The flange (brim) is 3mm thick and 48 diameter.
As 50mm barstock will not pass through the headstock of a 5" Boxford I have
though about buying cut blanks, gripping the OD in the 3 jaw and fully
machining the bore. Then machining the OD by holding the part on some sort
of mandrel. (The inner and outer concentricity need to be within 0.2mm or
so)
My dilemma is trying to decide how to hold the part on the mandrel (which I
don't want to take out of the chuck until I've made all of the parts.
I have thought of making an expanding mandrel which is somehow activated
through the headstock spindle but it seems overcomplicated
Thanks in advance for any suggestions
Ian Phillips
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As you`re limited by the spindle bore it would be better to get cut
blanks about 47mm long.
Grip in the chuck and rough bore the hole.
Do them all to that stage.
Grip in the bore with your three jaw and turn and finish the OD all
over.
Bore a set of soft jaws and grip on the OD and finish bore and face
off flange.
Mark.
.
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