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This
page details how I made
a set of hand wheels to suit the R A Barker manifold globe valves that
I fitted to my Stafford 'Gentoo', however you can obviously change the
dimensions to suit your own requirements. |
![]() Move the X axis of the table 11.75mm and drill a ring of six 10mm diameter holes to a depth of 30mm (angular spacing 60 degrees). Then move the X axis a further 8.5mm (total 20.25mm from the original "zero" position) and drill a ring of thirty 3mm diameter holes to a depth of 30mm (angular spacing 12 degrees). The bar can then be removed from the chuck and is ready for more turning on the lathe. |
![]() Now drill and tap the centre of the bar 4 BA so that the finished hand wheel can be mounted on the R A Barker valve spindles. I drilled the hole 30mm deep but the tap will have to be used after each hand wheel has been cut from the bar because the tap will not normally allow such a deep hole to be tapped. The first hand wheel now needs to be parted off from the bar, but as I did not have a parting tool that could cut deep enough I removed the bar from the lathe and used a hacksaw. The finished hand wheel is to be 4mm thick, so a 4.5mm thick slice needs to be sawn off the bar. I find that the easiest way to guide the saw is to take a strip of paper with a good straight edge and wrap it around the bar, aliging the straight edge as it completes a couple of turns around the bar. This gives a perfect guide line for sawing. Once cut off I put the uncompleted hand wheel to one side while I used the already setup lathe to machine the top face of the other three hand wheels I was making. Finally I placed a short length of 4BA steel studding in the lathe jaws and screwed a part machined hand wheel onto the studding with the rough side ready for machining. The hand wheel was faced off to be 4mm thick, and its outer diameter turned to 40.5mm. |
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