Machining Hemispheres on milling machine

[normanmj]

OSHA would love to visit that place.

[AunShovah]

Wow is all I have to say

nice setup

[MICMECMEXICALI]

there must be a connection betwen machinist, my father built a similar tool, wiith motorcycle gearboxes,a drill, also he cast her own aluminium with her home build foundry, all kind of modification to the lathe, even the universal machinist lathe with a car gearbox to change the head speed, good bless al the real machinist that build the tools and machines with out an uneversity degree just her machinist brain.

rip Mr salvador Alvarez Martinez a machinist from the old school

[HospY1000]

well done!

[MaCaHoliC52]

Ha Ha, I made a similar set-up with a rotary table and an old milling machine power feed, used a cogged belt to drive it, and the power feed had a rheostat on it to control speed. Got some wicked backlash from the rotary table so I had to keep the locks on half way. We were doing something similar only in acrylic,, man that was a tricky job.

Cool, and I thought I was the worlds greatest machining genius for dreaming it up,,good going we now have a power feed rotary table club going,,

[bmq05]

Wow that is amazing. That there takes a lot of knowledge and skill.

[levisalo]

That is a seriously cool set-up. Great improv, I like it!

[bangzilla]

lolll crazy

[DETHMETALTRASH]

Excelente, muy bien, deacuerdo con los comentarios anteriores, la inteligencia, necesidad, y todo, un saludo desde VENEZUELA, tengo 30 años trabajando con tornos y fresadoras, gracias a mi padre ELOY ALVAREZ por enseñarme a trabajar, si los amigos me agregan para intercambiar ideas, este es una muestra de las muchas ideas que existen exitos amigos.

[rasbooo]

Nice old school set up ;-)

[gettuff2]

The errror is created by the tool disc centre not bisecting the centre of the machined cavity. Unless you can get the tools revolving centre and disc centre at the centre of the cavity it will not cut true. In other words you cannot cut a perfect half circle with this method. It can be done on a shaper though!!

If you mount your rotary table in a vertical position and make a tool that is fixed to the table that pivots in a suitable arc and whose length is the desired dia to be cut and whose..

[gettuff2]

pivot is central to the cavity, by using double bell crank (similar to the bucket bellcrank on a diggers bucket where 180 deg of movement is required) you can power the tool to move in a perfect arc by the stroke of the shaper. The work will need independant travel toward the tool as the tool is best fixed to the table. Other than that CNC....

[gettuff2]

Sorry should be "whose length is the desired radius"

[rakker16mm]

@gettuff2

A full hemisphere is easily done once you work out the math. I have used this method on several occasions to cut perfect hemispheres for high pressure tanks. When set up properly it yields incredibly accurate results.

[Pure105]

Whoa this is COOL SHIT.

[raherecolston]

Looks like a bit of a bodge when you first see it. But dont be fooled! The knowledge, skill and ingenuity are all there. Wish I'd had the brains to think this up. Good vid thanks detroit diesel

[kawasakikillerr]

that is amazing. good job on the invention.

[carbons4]

Glad to see people using their brain. Very true comment Eddie.

[LongIslandEddie]

i'm impressed! This is the stuff of machinist's dreams, a challenge, a chance to use your own brain instead of some automatic shit that cuts you out of the formula for success. This ingenuity is what America was once about and sadly, we're so "advanced" in today's world markets that even the common layman wouldn't know enough to get by if we entered a new dark age, a day when survival meant quick and logical thinking in a situation where only mechanical skills will get you by. Nice setup, guy...

[CreazioniPinnacolo]

@LongIslandEddie and while hes racking his brain and doing math, ill be making money do the job for less and faster with my cnc... any good machinist that can program can do the same thing on a manual setup

[rakker16mm]

@CreazioniPinnacolo

The math is not all that hard, so you won't be that far along making chips. In fact I'd say it takes just as long to set a CNC mill or lathe to do the same job. CNC lathe would be the best option, but at the end of the day you will have to do the job with the tools you have or send it down the street.

I've used this method myself and it works very well.

[flyingscrapyard]

Great setup. I doubt you can ever have enough electric motors and reduction gearboxes. You just never know when you'll need one next.

[aletorno]

this is the kind of stuf that i use to do... good work

[puort]

s172mch

I hope for your sake you don't become one (a machine tool, that is)

[s172mch]

nice im goin to tech school next year for machine tool

maybe ill become one