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| 626 mill riser block |
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| John Rudd:
The 6" round bar arrived today for the riser upgrade on my mill...... :dremel: It is some weight I can tell you! Hopefully I can fit it in the lathe but how I'm going to hold it is yet to be decided.....! :coffee: Meanwhile here's a picture of the lump! :clap: |
| John Rudd:
The sawn face looks a good starting point for a datum....I s'pose I could put it on the mill table and fly cut the other side to ensure that is parallel, or I could drill and tap it and mount it on a face plate in the lathe...... If you were doing this what would your choice be? |
| RobWilson:
:clap: :clap: Thats a canny wee project John :dremel: --- Quote ---If you were doing this what would your choice be? --- End quote --- I would true it up in the 4 jaw :dremel: Rob |
| John Rudd:
Well had to go to Gateshead this weekend to help out with the granbairns.....so no further forward... However it has given me some thinking time about how I should machine the block.... :scratch: Looking at my 4j chuck, its max reach is around 6"....so the bar will probably just fit....so I'm thnking of buying a bigger chuck ....this one.. 282230982967 But I'll also need a backplate to match... Onwards and upwards.... :dremel: |
| John Stevenson:
John as you say they are big lumps and in a chuck, not holding on by much. First one I did I did it in a big 3 jaw but still had it come loose, loose, not fly out, a couple of times. Did all the machining and then drilled the 3 holes and the penny dropped. Next one I did I faced both ends carefully then marked out and drilled from both ends 3 holes in each at 8.5mm and tapped them M10. Fastened it on the face plate by the M10 screws with 4 dogs on the outside to act as "jaws" Never moved and then did all the machining at a far higher speed than the first one. The M10's get opened out to M12 clearance or tapped M12 depending on your design. |
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