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First lathe project completed!

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Jim Newberry 101/02/2014 13:35:27
24 forum posts
12 photos

Hi Folks,

I am feeling pretty pleased with myself at the moment. I had been looking for a lathe for a little while and faffed about trying to decide whether to buy a new or used lathe. Eventually a Myford ML7 came available and I took the plunge. Since getting it home I have spent many happy hours making swarf in the garage and I have built the engine shown in the pictures as my first project.

It is a single cylinder, double acting oscillator of 12mm bore and 18mm stroke. To say that I built it to my own design is a bit misleading since it is very similar to thousands of other engines of this arrangement, however I did build it from bar stock to my own plan so I suppose I can take some credit for that! I am particularly pleased with the in-built oil reservoir. If you look closely at the top of the frame you can see a CS 8BA screw. This has a 1mm hole drilled in it, into which a tiny tube is soldered to act as an integral dipstick and allow air in. A long hole is then drilled right through to the base with oil ways leading into the bearings.

The engine runs smoothly on either compressed air or steam and, for no particular reason, I have called it Cobweb. The next plan is to build the Double Cobweb.

Hope you like it!




John McNamara01/02/2014 13:50:26
1313 forum posts
113 photos

Hi Jim

Your own design and it runs! a Great start....
It is a priceless feeling when something you have made from inanimate raw material springs into life.


Speedy Builder501/02/2014 13:53:20
2186 forum posts
152 photos

That looks like a nice tidy job. You should be pleased with yourself. Keep looking on e-bay and the like for low cost good tooling. Steer clear of really cheap new stuff, sometimes the older used stuff is better quality.

Jeff Dayman01/02/2014 13:54:47
1974 forum posts
45 photos

Great job Jim, well done! JD

Andrew Johnston01/02/2014 14:37:22
5828 forum posts
662 photos

Wow, the engine looks great; although for a true cobweb you'll need to design and build a radial engine. wink 2


OuBallie01/02/2014 14:45:58
1150 forum posts
661 photos


You have followed the well trod path of starting with an oscillating engine, as I did in the early '70s.

Seeing that engine perform was akin to the feeling I got the first time I cracked the regulator on my Simplex, which then proceeded to pull me and three passengers with ease.

Something I'll never forget.

Enjoy and welcome.

Geoff - Time to sort out SHMBO rear light - Car that is

Jim Newberry 101/02/2014 14:54:03
24 forum posts
12 photos

Thanks all. Andrew… Radial you say…? Hmmm.

John Stevenson01/02/2014 15:10:23
5068 forum posts
3 photos

I had an oscillator but I cheated and bought mine.

The thing was a total disaster but then I sold the Ford and bought a decent truck smiley

Bob Perkins01/02/2014 15:25:43
249 forum posts
60 photos

Hi Jim

it looks very nice. I think the wobbler is the mandatory first project. I remember how satisfied I was when mine ran. What's project number 2 going to be?

Jim Newberry 101/02/2014 17:04:46
24 forum posts
12 photos

Thanks Bob. I am thinning of making a twin cylinder version for project number 2. Alternatively, maybe a diesel aero engine, not sure.


GaryM02/02/2014 00:51:09
314 forum posts
44 photos

Hi Jim,

Very nice little engine with a few unusual touches. Just curious, but why have you recessed the crank into the frame/stand?


Jim Newberry 102/02/2014 04:43:43
24 forum posts
12 photos

Thanks Gary, no reason at all other than I just felt like it and thought it would look good and a little different.


Jim Newberry 102/02/2014 07:59:56
24 forum posts
12 photos

Just spotted a mistake in my original post - it's a 4BA screw, not 8 as described!

Hopper02/02/2014 08:10:08
5063 forum posts
114 photos

Lovely little piece of work. And outstanding for a first job. I still have my first oscillator, and it's nowhere near as tidy as that!

Ady102/02/2014 18:54:50
4137 forum posts
576 photos

Well done you.

(btw you are now afflicted with an incurable urge to make stuff...)

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