We do not seem to have posted much of late – but the work has been carrying on just the same! In addition to everything else that Steve has taken on, he is also building two 7 1/4” Gauge Hymek Locomotives for our Model Engineer Society – that project has been going on for sometime and Steve would like to get that one finished now and out of the way so that he can concentrate on the Thorny - that has taken some of his “Thorny” time of late! All the planning with the “Thorny” engine has taken more time.
In between bouts of household maintenance, Tony has continued making engine studs and these are all now finished so that we should have a clear run when the re-assembly of the engine commences.
Today, just for a change, Tony decided to make the two main fixings for the clutch springs – the originals are bent and corroded. This is just a simple turning and threading exercise. The first picture shows the clutch assembly – notice that the picture was taken nearly a year ago when we started to take the engine to pieces and you can see the original parts in situ with Steve gently attacking one of the nuts with a hammer and chisel! They are 7” in length overall with 1/2” and 5/8” Whitworth threads at the ends. The main diameter is 1” and they are machined out of 1” steel bar.
These three pictures show the embryos taking shape.
The threads are screw cut in the lathe to about 4/5 of the depth of thread and the last bit then finished with a die. The 1/2” threads are done but the 5/8” threads will be a “tomorrow job”!