Cogsy,
Thanks for your comments and advise.
Bellow is a photo to show the finishing I got on piston liners.
![DSCN2788.jpg DSCN2788.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48394-476f871febaf67cbd290effe2ae8418e.jpg)
The way I machined the cam lobes, the end mill produced a crown on the base of the lobe, you can see it on the photo bellow.
![DSCN2730.jpg DSCN2730.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48395-054282e159d668305a0f75086962c3da.jpg)
To remove the crown I grinded the lobe moving the grinder chuck by hand from one flank to the other flank. See the result bellow
![DSCN2793.jpg DSCN2793.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48396-3604bf57fded223649b493c723e34449.jpg)
Boring the piston pin hole
![DSCN2799.jpg DSCN2799.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48397-1965ffb43c848a5bde1956fd0aba92a4.jpg)
![DSCN2801.jpg DSCN2801.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48399-ff914fb4cd9a59554806031658cf72e1.jpg)
Alining the bore to machine the slot for the conecting rod
![DSCN2802.jpg DSCN2802.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48398-84cc8f7185a2a1827888ab6e9f9ec7b7.jpg)
![DSCN2806.jpg DSCN2806.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48400-17bf457a2b175a00912a45be11d75c75.jpg)
Then I took the piston to the lathe to remove the epigot used to hold the piston on the milling vise. I used the pin hole as a stopper to ensure all the pistons had the same dimension from the center hole to the top of the piston
![DSCN2810.jpg DSCN2810.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48401-d3fb2818e0b10cbea9638f1a9be533fe.jpg)
![DSCN2811.jpg DSCN2811.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48402-1e79038ae9bb9462a0f01d911928dc52.jpg)
![DSCN2815.jpg DSCN2815.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48403-0076894f366e0ae940cf698b4022bb66.jpg)
Thanks,
Edi
Thanks for your comments and advise.
Bellow is a photo to show the finishing I got on piston liners.
![DSCN2788.jpg DSCN2788.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48394-476f871febaf67cbd290effe2ae8418e.jpg)
The way I machined the cam lobes, the end mill produced a crown on the base of the lobe, you can see it on the photo bellow.
![DSCN2730.jpg DSCN2730.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48395-054282e159d668305a0f75086962c3da.jpg)
To remove the crown I grinded the lobe moving the grinder chuck by hand from one flank to the other flank. See the result bellow
![DSCN2793.jpg DSCN2793.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48396-3604bf57fded223649b493c723e34449.jpg)
Boring the piston pin hole
![DSCN2799.jpg DSCN2799.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48397-1965ffb43c848a5bde1956fd0aba92a4.jpg)
![DSCN2801.jpg DSCN2801.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48399-ff914fb4cd9a59554806031658cf72e1.jpg)
Alining the bore to machine the slot for the conecting rod
![DSCN2802.jpg DSCN2802.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48398-84cc8f7185a2a1827888ab6e9f9ec7b7.jpg)
![DSCN2806.jpg DSCN2806.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48400-17bf457a2b175a00912a45be11d75c75.jpg)
Then I took the piston to the lathe to remove the epigot used to hold the piston on the milling vise. I used the pin hole as a stopper to ensure all the pistons had the same dimension from the center hole to the top of the piston
![DSCN2810.jpg DSCN2810.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48401-d3fb2818e0b10cbea9638f1a9be533fe.jpg)
![DSCN2811.jpg DSCN2811.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48402-1e79038ae9bb9462a0f01d911928dc52.jpg)
![DSCN2815.jpg DSCN2815.jpg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attachments/48/48403-0076894f366e0ae940cf698b4022bb66.jpg)
Thanks,
Edi