Is it possible to make new housings whit a CNC machine or are they molded?

my friend has a sweet CNC machine and i wanted to know if i cad out spec's for the housings if i could possibly make then with a CNC machine?

 

The stock parts are cast. They would be difficult if not impossible to CNC in one piece due to the internal cooling passages. You would need to make the end irons in two pieces, the middle iron in 3.

A few minutes spent looking at one of the stock irons will easily show you why.

 

They are cast iron, than the surfaces are milled.

 

i know the irons would be impossible to CNC but the rotar housings are straight through cuts right.

it was just a thought

 

Well, your title did refer to irons...so that's what was referred to.

As far as the aluminum rotor housings are concerned, the shape would be easier to make, even the tapered coolant passages, but the main problem would be to produce the chromium (?) plating that seems to be impregnated (almost absorbed or something) into the aluminum on the inside. I think I've seen some posts with guys restoring this plating to a certain thickness and then machining to new specs. and remember reading that it's cheaper and easier to just buy new.

Maybe one of the resident experts can refresh my (our?) memory here.

 

The rotor housings are cast aluminium, cast around a chromed steel insert which provides the sealing surface.

You could probably CNC one out of a billet block of aluminum if you have about 10 hours on the machine, but that won't help you with the chromed surface. New rotor housings from Mazda are about $375 each.

 

just wondering. oh well thanks for all the info. i can always count on this site to help me out.

 

I always thought it'd be interesting to make your own single rotor engine with the aid of a cnc machine.

 

CNC machines are fun to play with. endless possibilities

 

indeed. im waiting to be trained on them at work.
we just got a 4 million dollar one and have 2 more on the way.
then im up to a machinist III
all the old fellers wont retire thought...

 

You don't need a CNC machine to make a single rotor, just a lathe.