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

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PekkaNF:
Very nice.

What is friction turning?

What abrasive you used to hone the displacer cylinder? SIC?

Very educational to see your setups.

Thank you much,
Pekka

fcheslop:
Nice to see you getting back into the swing
Not sure these engines will catch on though :palm:
cheers marra

Stilldrillin:
John, Dave, OZ.
Thanks! Much appreciated....... :thumbup:

--- Quote from: PekkaNF on October 18, 2016, 07:06:06 AM ---Very nice.
What is friction turning?
What abrasive you used to hone the displacer cylinder? SIC?
Very educational to see your setups.
Thank you much,
--- End quote ---

Pekka.
Friction turning? ..... Machining a disc, (usually), trapped between two faces. Held together by pressure from a live centre, in the tailstock.
Here's where I first started practicing. Straight onto the chuck jaws..... http://madmodder.net/index.php/topic,566.0.html
Now, I use a couple of pieces of plastic, around 30mm dia. The piece in the chuck is faced with h/duty insulation tape.

The wooden lap, is made from an offcut of curtain pole. (Brush handles are just as good).
Turned to bore size -.002". Start off with coarse valve grinding paste. Plus a spot of oil. Progressing to fine, as things settle down.

Thanks for your kind words...... :thumbup:

fcheslop:
Cheap rolling pins are also handy but dont let the big boss know and the broom shank in the garage is getting a wee bit short.For clock parts I also use MDF but it soon blunts youre tooling its also good for making spinning former's for a small run of parts.
cheers

Stilldrillin:

--- Quote from: fcheslop on October 18, 2016, 02:39:27 PM ---Nice to see you getting back into the swing
Not sure these engines will catch on though :palm:
cheers marra
--- End quote ---
Heyup Frazer. Thanks mate!
It certainly seems an uphill struggle! Why are so many of them, made wrong?
Why do so many people spend so much precious time, making a doorstop. Just by altering the ratio?? :scratch:

Still....... It has kept me amused, for a few years now....... :thumbup:

--- Quote from: fcheslop on October 18, 2016, 04:48:51 PM ---Cheap rolling pins are also handy but dont let the big boss know and the broom shank in the garage is getting a wee bit short.For clock parts I also use MDF but it soon blunts youre tooling its also good for making spinning former's for a small run of parts.
cheers
--- End quote ---

Hadn't thought of a nice chunky rolling pin! Good thinking!
One of my backing pieces, is from a chopping board.......

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