- Joined
- Jan 17, 2009
- Messages
- 887
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- 81
When I was skiming through the John Tom drawings I saw the rocking engine: and thought it was a osilating engine and passed it by, the name intreged me so a few days later I went back for another look, that,s when I got hooked, I love novelty engines like this and its small size suites the type of work I like doing and it looked like It could be a weekend project:- as I'm going to retire in two weeks I thought they would make a nice presents for couple of work friends.
It's also a good delaying tactic to avoid assembling my locomotive I'm building, a change is as good as a rest.
These are the drawings
http://www.john-tom.com/MyPlans/SteamPlans3/RockingSteamEngine/ROCKING STEAM ENGINEs.pdf
Any of you chaps made this engine ?
I'm a great beliver that its just as easy to make two of something
First job do all the turning bits.
I made the two cylinders together to speed up the work, turned the OD of the cylinders to the size of the square diagonal, put a groove to show where the join would be, and used a 3/8" end mill to finish off the flat bottom hole.
To mill the square set up in vice touch down on the job set DRO to zero mill off 1/2 the difference of the diameter and across flat size you want zero DRO, flip it over 90 deg with the flat against the vice jaw mill down to zero flip it over 90, mill off the remaining difference zero dro, flip it over finish off other side you've got a square.
To mill out the pocket for the crank I used a long reach 1/8 slot drill set the job up in the mill with the vice stop, milled the first pocket out zeroing everything up, turned it round and making sure it was up against the stop and milled the seconf pocket working up to the zeros, the same routine was done for the crank and stand holes.
For the flywheel turned down the bar to size then transfered them over to the RT in the mill and drilled the spoke holes deep enough to make two fly wheels.
This is one engine finished off with the second waiting for the flywheel
Does it work
NO :redface2:
If you look at the photo showing the finished engine it sitting on a pad with a lot of figures on it, a quick measure and a calculation and yes I'd drilled the piston wrong and it was bottoming in the cylinder :wall: I'll just have to make again.
Slightly embarised
Stew
It's also a good delaying tactic to avoid assembling my locomotive I'm building, a change is as good as a rest.
These are the drawings
http://www.john-tom.com/MyPlans/SteamPlans3/RockingSteamEngine/ROCKING STEAM ENGINEs.pdf
Any of you chaps made this engine ?
I'm a great beliver that its just as easy to make two of something
First job do all the turning bits.
I made the two cylinders together to speed up the work, turned the OD of the cylinders to the size of the square diagonal, put a groove to show where the join would be, and used a 3/8" end mill to finish off the flat bottom hole.
To mill the square set up in vice touch down on the job set DRO to zero mill off 1/2 the difference of the diameter and across flat size you want zero DRO, flip it over 90 deg with the flat against the vice jaw mill down to zero flip it over 90, mill off the remaining difference zero dro, flip it over finish off other side you've got a square.
To mill out the pocket for the crank I used a long reach 1/8 slot drill set the job up in the mill with the vice stop, milled the first pocket out zeroing everything up, turned it round and making sure it was up against the stop and milled the seconf pocket working up to the zeros, the same routine was done for the crank and stand holes.
For the flywheel turned down the bar to size then transfered them over to the RT in the mill and drilled the spoke holes deep enough to make two fly wheels.
This is one engine finished off with the second waiting for the flywheel
Does it work
NO :redface2:
If you look at the photo showing the finished engine it sitting on a pad with a lot of figures on it, a quick measure and a calculation and yes I'd drilled the piston wrong and it was bottoming in the cylinder :wall: I'll just have to make again.
Slightly embarised
Stew
