Cheers Dean ,,,,,,,,, The casting is surprisingly good , only one spot witch has some porosity
This post may have way to many photos
,,,,,,, I machined up the casting over the past two nights ,this is how i did it .
The casting had to be marked out to give me some reference points to work from and to make sure the casting would machine up correctly .
the casting was set up on the surface plate using a couple of small screw jacks and an angle plate so i could mark a datum line through the center of the casting .
once i was happy with the position of the casting the centre line datum was marked , this will be used to set the casting up on the mill
Next the position of the crank centre was marked out and all other parts to be machined as a guide so that i dont machine off something that i should not
That done time for some machining
, I wanted to mill all parts without having to reposition the casting once bolted to the mill , so i decided to use the Aceira F3 HZ/V mill , I just had enough travel on the mill , machining the casting this way i would not have any alignment issues.
The casting was set up on the mill using the datum line
Had to use my small doodad , that lets me have a tee slot were i need it as i was very limited to were on the mill the casting could go.
With it all set up the cylinder end was machined up
next the bearings , the table on the mill tilted to 18 degs
next picking up the datum the inside of the bearing supports were machined
that done i could machine them to the correct thickness
then the tops were machined
Then off with the vertical head so i could machine the bosses for the timing gear and stuff with the tooling in the HZ head , One of the previous operations machined off the crank centre , so a temp datum was fitted.
with that located it was a case of across a bit down a bit using the dials to locate the centre fro the timing gear shaft
After drilling the hole was bored to size using a very small boring head
Then the rest of the bosses were machined up
Job done ,,,,,,,,, well still need to do the bolt down pads
Cheers Rob
