Gallery, Projects and General > Project Logs

Bodging with Boris/ Bernhardt........

<< < (7/16) > >>

Stilldrillin:

Managed to get some Boris work done, over the past week.

I'm used to catching up on household, gonna do's. But, after all this, "almost crocked" time, I'm having trouble with, whatabout's, whenyergonna's, and havyerforgotten's.......  :bang:

A piece of 1/4" brass, spigoted/ screwed to the end of 8mm dia bar.......




6mm, far end. 4mm, this end. 110mm apart.......




Taper turn. Mill little end flats........




That looks better, to me........




Graphite piston. Roughed out, and parted off. (Most of the mucky work done)......




Thanks for looking in!

David.

Stilldrillin:
I've got a bit behind, with the write up...... :Doh:


Delrin mandrel, to mount piston.......




Held on, with M6 caphead. Finish turned, until it almost enters the bore. Mucky stuff!




Six inch rule. Supporting reversed emery cloth.

Polish the outer end o/d, until the piston enters the cylinder. Then, polish the centre section. allowing it to enter some more.

Then finally, polish the skirt area. Allowing full length entry to cylinder.......




Obviously, both hands needed for polishing control. I needed my left hand for the camera!

Reversed emery cloth is used for polishing graphite.
Fine emery cloth. Correct way around, for brass etc.

The steel rule backing, gives much better control, than fingers....

Thanks for looking in!

David. :thumbup:

Stilldrillin:

I slotted and cross drilled/ reamed. The clevis.......




Drill/ tapped M4 through. Reducing shank to 6mm dia, to locate in piston......




That looks better, than original........




This afternoon, I finished the piston/ cylinder fit to each other. Then sleevelocked the cylinder liner in place, in the original cylinder.

Assembly, tomorrow. Wonder if we'll have a runner, soon?  :scratch:

Thanks for looking in!  :thumbup:

David.

Stilldrillin:
We've now caught up to, last Friday.  :thumbup:

Finished piston/ rod assembly........




Commence assembly.........




Not happy with the offset scotch yoke, link. It wants to bend the  unsupported displacer shaft.......




Now, we just need a flywheel.......




I have a suitable casting. Though, it is made of unknown bronze. Rather tough stuff!  :palm:

That is a 4" dia chuck. I like to make my machinery work hard, when necessary.........

 


The belt had done 3 years, since I modded the lathe to lower the gearing. Can't grumble! 

All good Engineers have a spare! It was up and running, after 20 mins fumbling. But, I'd had enough, for one day........    :bang:

Thanks for looking in!  :thumbup:

David.

Stilldrillin:
Finally got the flywheel, proof turned. Sufficient to be in balance.......

Put a small light under. And, after a few seconds.........




It's a great feeling!   :D

David.

Navigation

[0] Message Index

[#] Next page

[*] Previous page