6th July 2010

I thought it worth casting an eye, through the blog, over the wheelsets to be fitted underneath the first chaldron that Alan is rebuilding. Study of any photograph of chaldron waggons will reveal a wide variety of styles and types in use, something Dave Potter’s drawing survey is getting to grips with.

Below: The standard type of wheel is the split spoke type. Forged spokes are laid out on the foundry floor the hub is cast around them before a tyre is fitted (often rivetted) in place. The patent for this was by Stephenson and Losh and the type became widespread. Puffing Billy at Beamish has this type of wheel, made new, and very well they look and work. The particular wheelsets in use on this waggon are second hand to Seaham. They are cut down examples presumably bought second hand from main line railway companies – we have examples with L&Y (Lancashire & Yorkshire railway) cast on them. This view clearly shows the original axle has been shortened to convert from an outside bearing to inside bearing running. Seaham Harbour wasted no opportunity to recycle old material! Original chaldron wheels tend to have a cast face to the hub, carrying the name of the foundry who made them. Such parts would be supplied in quantity, for the Seaham Waggon Works to assemble, adding timber in their own shops.

Below: Looking at the rear of the wheel the journal is apparent – this is the surface which runs in the bearing and must have been machined at Seaham in order to use the wheel under the chaldron. A substantial tyre is fitted. The original wrought iron wheels that we have at Beamish are very worn so the need for in-service replacement is clear.

Below: A close up of the pedestal bearing and retaining strap, hanging upside down on the journal. There is a lot of scope for sideplay, which to some extent is obviated by the final positioning of the pedestal.

Below: Meanwhile, on the chassis, the coupling is placed for marking and fitting. It is made of three separate elements, fire welded together. One of these may be a repair however.