Gradually increase the depth of cut using the saddle and traverse the cross slide
to make the cut. The method worked so well that I wished I had used it for the similar
operation for the 10V. I will certainly consider using boring tools for machining
castings in future even on the milling machine as boring tools can be had quite cheaply
compared to a single point end mill having removable tips. The curved bottom of the
aperture can be finalised using a largish round file as it only needs to have clearance
with the bearings being fitted, as does the width of the aperture just made.
Finally. make a tapped mandrel to fit the bore of the casting and mount it as seen
in Photograph 81, the reverse side of the flange can then be machined using the parting
tool in the rear toolpost.
When drilling the five holes in the flange do ensure that they are positioned correctly
so that the cylinder and the valve chest are in the right place when assembled.
Having now made four Stuart 10's, two 10V's and two 10H's I have christened them
“The Family”, and are seen in Photograph 82, I have also made the larger “Tina” from
GLR Distributors. Unfortunately though, I have never found the time to make a boiler
so I have no experience in setting one up for using it under steam. For those who
do wish to run the engine Stuart do publish on their website two PDF's, one on setting
up the engine and the other on running it.
With these pages now complete I hope it has gone some way to meet the requirements
of those in the forum who commented about making one using just a lathe.
For me, I now have four Stuart 10's only the first being made purely for the satisfaction
of making it. The second was as a result of being asked to give a talk about my metalworking
activities to the local Salvation Army men's fellowship and thought that they would
not understand the work involved in making the first engine so purchased a set of
castings to show them.
Number three and four obviously as a result of making them to help those forum members.
I do now think that four is enough!