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| PeterE Tries to Build a Trojan ... |
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| NickG:
Nice 1 - those stevenson hex and square collets are on my xmas list! |
| PeterE:
Nick, A very good choice for x-mas present. Also good precision I might add. My two are often in use and they are ER-32 size. I also have the lathe collet holder as well as an MT2 holder for the mill. In the picture you can actually also see my ER-16 collet holder originally bought for the MJ-189 lathe. Right here I have mounted the collet holder to an M14x1-MT2 adapter so I can use it on the mill. I also have the same lathe adapter which is going to get a back plate to fit the C3. That way I have useful collets from 1 mm up to 20 mm even if they come from two different sizes. Only the 10 mm collet is found in both series. BR /Peter |
| NickG:
That's what I need as my mill collets are ER32. They were out of stock last time I checked! A lathe collet holder would be handy, I can put the MT3 holder in my lathe but you can't pass stock through it then / are limited to length. Good what you have done there, made it a very versatile system. :thumbup: |
| PeterE:
The ability to pass the material through the collet is one of the main reasons for me to choose ER-collets and the lathe collet chucks. BR /Peter |
| PeterE:
Slowly advancing the build. Thought I would give the piston go. So, I cut out a small squarish lump of cast iron from a left-over piece and set it up in the 4-jaw to get a suitable circular stem to move into the collet chuck instead. As you can see, the stem for the collet chuck became fairly big in comparison to the piece that is going to be the piston :palm: (the photo angle lies somewhat though.) As said, set it up in the collet chuck and turned to size. Then drilled the little center hole (3 mm) and made the groove for the graphite yarn to act as piston ring. Finally a test assembly on a short piece of what was intended to be the piston rod, but allowing too little over length it became too short so I stopped. Anyway, It became a good test and it seems to work out. I made the piston fit the cylinder with ease but no rattle, Any angle and it sticks. I hope this is the correct fit. Before re-doing bits I am now again waiting for more material and a few more tools :D BR /Peter |
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