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[RaaArtyGunner]

OK, to all the engineers, I see it, but are they pulling our leg.

http://www.youtube.com/watch?v=tqOe2In9ShQ

[derekwarner]

No No No ........RaaArtyGunner ....this is all true with the advent of very sophisicated CNC & tooling

The British, Russian & American have had this manufacturing facility for a number of years

The only real issue for me is understanding what we are going to do with precision dimensioned SQUARE holes...........

  ...sorry a hole by convention is ROUND...so  what do we call them?....square apatures? ...square openings?.........................Derek 

[Tug-Kenny RIP]

Terrific forces on the bearings though !   


ken

[cliff2903]

NO NO NO !!!
 The machine holding the tool may have changed considerably over the last 50 years but the principle is older than me and probably older than most mayhem members. i used this method a lot during my toolroom apprenticeship 

basically -- its a floating tool holder which allows tool movement from side to side as it rotates, the cutter has to have one flute less than the number of sides you are cutting. cutters are straight fluted and only cut on the end,

difficult to explain but when the cutter touches the work piece it tries to move but is prevented from doing so by the template it passes through, one flute then gets stuck in a corner which drags the cutting end round therefore cutting the work piece then the next flute gets stuck in the next corner and so on, it only cuts in a downwards motion,

 we used to use them to cut sockets in the heads of special bolts and adjusting screws but by using a six sided template and five flute cutter (which we used to make ourselves as well  )

[nemesis]

Hello, On Tomorrows World a few years back Raymond Baxter demonstrated a lathe turning a round billet & putting a square end on it.
The early days of CNC. Nemesis

[cliff2903]

her indoors is getting a bit worried, she crept downstairs at 2 am the other morning and caught me watching this--

http://www.youtube.com/watch?v=qTEkgVkMFRc     

[RaaArtyGunner]

No No No ........RaaArtyGunner ....this is all true with the advent of very sophisicated CNC & tooling

The British, Russian & American have had this manufacturing facility for a number of years

The only real issue for me is understanding what we are going to do with precision dimensioned SQUARE holes...........

  ...sorry a hole by convention is ROUND...so  what do we call them?....square apatures? ...square openings?.........................Derek 

Derek
Could it be termed a square orifice?
Not being an Engineer, I still don't see how you can get a Square (90degree) corner without any rounding without cutting back in the opposite direction.

[brianB6]

It's always been a square peg in a round hole so why not a round peg in a square hole? 

[CGAux26]

Eny good Aggie farmboy knows pie are round, cornbread are square.  Not pi-r^2.   

[CF-FZG]

...sorry a hole by convention is ROUND...so 

Sorry Derek, gotta dissagree with that - a hole is an 'orifice' and can be any shape you want it to be


Mark

[treeboa]

Sorry Derek, gotta dissagree with that - a hole is an 'orifice' and can be any shape you want it to be


Mark

yep thats correct, when my dogs start barking i offer to make thiers boot shaped 

[derekwarner]

don't be sorry CF-FZG.............& yes I stand corrected 

1. a hole can be round
2. a hole can be square
.........
349. a hole can be the determination for a game
........
749. a hole can be many many things 

  even in OZ we have square meat pies.............which are usually demolished with a beer or two......or be it two pies & four beers.......Derek