First mini lathe project, oscillating steam engine.

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Ross:

--- Quote from: wongster on February 05, 2012, 10:01:22 AM ---Hello Ross,

May I know what is the black disc between the flywheel and the chuck jaws in the pics showing the driving by fraction?

I've 2 x 12mm thick disc to turn and would like to use the same method you have shown.

Regards,
Wong

--- End quote ---

It's a large-ish washer covered evenly in insulation tape!

Ross:
I was out in the shed again today, but I abandoned as there is something I just can't get right!

I marked out the piston, and I need to drill the hole through for the piston. Though it's offset about .375" so Ive tried to offset it in the 3 jaw with packing to little effect, I just can't get my centre punch mark to centre!

Here's my problem.

Would it be better to use the 4-jaw chuck for this? or is there a more successful way of doing this with a 3-jaw instead of trial and error.

Ross

Stilldrillin:
Ross.

Here's where you get to practice setting up that new 4-jaw! :thumbup:

David D

foozer:

--- Quote from: Ross on February 07, 2012, 12:06:19 PM ---I was out in the shed again today, but I abandoned as there is something I just can't get right!

I marked out the piston, and I need to drill the hole through for the piston. Though it's offset about .375" so Ive tried to offset it in the 3 jaw with packing to little effect, I just can't get my centre punch mark to centre!

Would it be better to use the 4-jaw chuck for this? or is there a more successful way of doing this with a 3-jaw instead of trial and error.

Ross

--- End quote ---

4-Jaw would be the best choice, once you do it a couple times it becomes easy

Robert

NickG:
Nice work Ross,

You can calculate the amount of packing you need but it's nowhere near as obvious as you'd think! Marv has a program to work it out called ECCENT but it doesn't seem to work on my system anymore for some reason!

Nick

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