puddleduck engine build

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ParCan:
Got the Con rods remade today.
Put a small (0.25mm) boss on the Big end to help keep it all free and not rub on the crank webs.

The whole thing has been stripped, cleaned and lubed before Building it right up.
It all turns, but i'll leave that there. There are tight bits all over the place.

Pistons drop under their own weight. They are spot on.
Crossheads slide on their own, until you start linking them together with the Pistons and / or crank.
Crank on it's own is not bad, 1 Bearing Block is a tiny bit to far out but I really should remake those anyway as they are upside down.

I think I have a hole or 2 off square in the Crank Webs.

Crosshead rods are (were) ~ 1mm out. Holes filed to make them work. I really should remake the Top Plate.

All In all I'm not unhappy with what I have made and have had hours of fun already.
The reality is coming to me that this engine may or may not actually work !
There are simply to many errors duing my learning process.

My plan is to complete this engine and see if I can make it go, then use the experience I have gained to build a second.
I also intend to invest in a Mill.

The Milling slide on the Myford works but everything takes forever to setup and machine.
I's also suseptable to moving if you try and take anything more than a 1mm deep cut.
Tighten it up more and it distorts the Cross slide.

Brass_Machine:

--- Quote from: ParCan on June 05, 2012, 01:12:06 PM ---...
...I have made and have had hours of fun already.
...

--- End quote ---

That is the most important part. Having fun!

Eric

krv3000:
hi I'm imperst my next engine will be a twin so I'm watching your billed with grate interst

DaveH:
Alex,

I have to say, if you can mill on a lathe, then milling on a milling machine will be a "walk in the park" :thumbup:

Your engine is looking good, nice work :clap:
:beer:
DaveH

ParCan:
I jumped on the Bike and Nipped in to East London today to look at the mil; offerings from http://www.amadeal.co.uk.

The guy I spoke to was helpfull but is not an engineer in any way shape or form.
They as a company are in it to buy, sell, trade and do business. They trade in SEIG machines direct from China.
All in all they have a reasonable premisis with a reasonable amount of stock kicking around.

Looking at their XJ12-300, it's little more than a drill.
The AMA16 is small, compact and looks much sturdier.
The AMA25 is a lot more money but I think for anyone serious, not a bad (at the small end of the market) machine.

The AMA25 is to large for my workshop, so I bought an AMA16LV with a Vice and Collett set.
After a bit of haggling a deal was struck and it should turn up here on Tuesday.

We shall see how good the machine actually is.

Alex.

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