ninefinger
Well-Known Member
OK, this is going to be a really slow build so I thought it more appropriate to make a thread here as a work in progress. I'll go back and add info to my thread in "engines from castings" when I'm all done in a couple of years...
OK, for this months progress report I had a go at the crankcase (I won't say how many tries I've had at it so far but its getting up there...lots of stupid, dumb, noob mistakes...)
Anyways this one is a keeper (so far!) and I'm learning as I go so that is worth something.
Here is the part on the rotary table, I've just skimmed the 9 flats where the cylinders mount. I had machined this before using CNC to cut the flats but I decided to double check the CNC and also square it up just a fraction as the cutting from the "front" is not ideal and I had a longish tool stick out.
You can see in the 2nd picture the uncut area - only on this one face. Its probably only 1-2 thou down so I'm going to leave it as is and deal with any consequences later.....
Next up is to open up the faces for the cylinders and drill & tap for the attaching screws.
OK, for this months progress report I had a go at the crankcase (I won't say how many tries I've had at it so far but its getting up there...lots of stupid, dumb, noob mistakes...)
Anyways this one is a keeper (so far!) and I'm learning as I go so that is worth something.
Here is the part on the rotary table, I've just skimmed the 9 flats where the cylinders mount. I had machined this before using CNC to cut the flats but I decided to double check the CNC and also square it up just a fraction as the cutting from the "front" is not ideal and I had a longish tool stick out.
You can see in the 2nd picture the uncut area - only on this one face. Its probably only 1-2 thou down so I'm going to leave it as is and deal with any consequences later.....
Next up is to open up the faces for the cylinders and drill & tap for the attaching screws.