Hollow form turning

The opening through which the inside of the blank is evacuated is small as compared to the diameter of the piece.

That is a start, at least, I think.

Leo?

Arch?

Bill

Bob, I'll offer: "If it cannot be made with a conventional straight gouge or scraper". Certainly flawed as descriptions go, but I think it covers most cases. Good luck getting a concensus. ;o)

David

"Bill Rubenstein" wrote: The opening through which the inside of the blank is evacuated is small as compared to the diameter of the piece.(clip)

^^^^^^^^^^^^^^^^^^ That is essentially what is meant, but when you get involved in competition, they get picky. I think my club defines it as a vessel with an opening of 1

1/2" or less, but I don't know whether there is a universal standard. If I had to write a definition, it would be a certain percent of the maximum diameter.

Years back, Lyn Mangiameli and I had running arguments about the validity of judging a vessel by how small the opening is. I'd rather not get that going again.

The 1 1/2" or less test fails if the blank is a 1 3/4" cylinder with a 1

1/2 opening -- that could be a box with a 1/8" wall thickness. I think that your 'percent' would be necessary.

Bill

I don't get out much with other turners even though I essentially turn for a living, so I don't know what others think, but I have had to develop some working definitions of my own for when I am communicating with galleries. First, a hollow form is hollowed as opposed to a weed pot which is simply drilled. Then: if the hole looks quite small in relation to the diameter, it is a hollow form if the hole is nearly as big as the maximum diameter, then it is a bowl if it is somewhere in between, I call it a vessel I guess technically they are all vessels, but I needed a term for something not an open bowl and not a hollow form, so I reserve that term for the in-between category. If somebody has a good alternative I'd be pleased to hear about it.

-mike paulson, fort collins, co

"Mike Paulson" wrote: (clip) if it is somewhere in between, I call it a vessel I guess technically they are all vessels, but I needed a term for something not an open bowl and not a hollow form, so I reserve that term for the in-between category. If somebody has a good alternative I'd be pleased to hear about it. ^^^^^^^^^^^^^^^ I've always heard that "in between" category called a "closed form."

Hi Bob

I would classify a turning, a hollow turning if you would need hollow turning tools to make it, like a swan neck tool etc., the size of the opening does not fit all cases I would think, say for instance a turning that is 15" wide and 6 or 7" tall with a 4" opening, that would qualify as a hollow turning in my opinion. If for a competition, than sizes can be set arbitrarily, however in real life there will be turnings that some might not think a hollow form wile others would, it depends a bit on ones perspective I think.

Have fun and take care Leo Van Der Loo

Bob Hews> How would you define a hollow turned form?

Edith.

It's a good name, and by the responses, as descriptive of the actual item as any.

Air surrounded by hype. It's the politician of turnings.

Handsome here is not as does, because you can't just show a picture of it without including all that extra information to show the virtuosity and dedication of the turner.

Christmas ornaments are hollow, but it's a useful thing with them to keep the limb from bending, so it can't count.

Essentially, most things we turn as faceplates are "hollow" forms or vessels, be they bowls, vases, boxes or whatever. I think the term "hollow form" as we use it to determine a "type" of form indicates a vessel with an obviously small diameter opening compared to the diameter of the piece. I have seen many of them turned inside and out using only a gouge and I have used hollowing tools to undercut a bowl lip so the type of tools does not determine the type of the piece. One of the commonly accepted variables seems to be that vases have the grain going perpendicular to the base and hollow forms have the grain parallel. So we have a vessel with an opening obviously smaller than the diameter of the piece, most of the interior removed, and the grain parallel to the base.

And what about those 'hollow forms' that are made in two pieces, top and bottom, then glued together?

I started doing hollow forms by turning what my wife called my beads. I would take a small square chunk and try to turn it round with as small an opening as I could. It was lots of fun and challenging. Later when I started doing shapes that could better be described as vases my wife admitted that she did not care for the vessels with small openings.

More important is the total shape of the piece. > "Bill Rubenstein" wrote: The opening through which the inside of the blank

"Bob asked us to define a "hollow turned form", but his subject is "Hollow form turning". I'm unsure if he meant a turned form that is hollow or a form that was hollowed by turning. I _am sure that it is of little importance except for dispute.

I recognize a bowl or a hollow form when I see it. So do you and you and you...not always concurring. Same with other ambiguous turning terms like "bowl gouge" and "spindle gouge" not to mention "optimum sharp" and 'safe speed".

Baseball analogies (stepping up to the plate, etc.) are the current rage so I suggest that hollow forms are like balls and strikes: The strike zone is clearly defined in the rules, but each umpire has his own. Of course, we have no rules. :)

Turn to Safety, Arch Fortiter

Well, for my 2 cents worth, I had it defined as open and closed forms. Open is when the opening is bigger than the inside of the vessel. Closed is when the opening is smaller that the inside. A closed form can be done with standard turning tools, but you can't under cut the rim. robo hippy

======================= Those are hollow cheater forms! (:-)

Ken Moon Webberville, TX.

====================== Mike, I thought you moutaineers came down to civilization once a year.

Ken Moon Webberville, TX.

I would not classify two bowls glued together as a "hollow form". I think of them more as an attempt at salvaging a matching pair of bowls after accidentally going through the bottom of one.

(Just my sarcastic bent of the day, recuperat>> "If it cannot be made with a conventional straight gouge or scraper". > >

"David Wade" wrote: (clip) salvaging a matching pair of bowls after accidentally going through the bottom of one. (clip) ^^^^^^^^^^^^^^^^^ I guess I am not alone--the bowl is ruined, but too nice to throw away. I don't usually turn bowl in matching pairs, but I am going down to my shop--strike that--*studio*, and see whether any of these beautiful failures can be salvaged by marrying them to something I turn now. Thanks for the idea. Can we keep this quiet?

I dunno, "civilization" doesn't seem as civil as I might like it these days. At least we turners keep smiling when we disagree. :)

-mike