We have now developed a method of casting the bore, so there is no need for you to worry about drilling out the castings. In fact it is so easy that we have decided to put the buffers together for you. That means no missing springs or buffer heads in the carpet - we've done all that for you too.
All you have to do, is paint the casting - trim off the end of the buffer shank where necessary, and glue it into place. DANGER - do not try to solder the castings - we have used a special bismuth alloy which has a very low melting temperature.
General guide to buffer types. The length of the casting is detemined by the type of coupling used and the shape of the body. The standard recoil length of a buffer is 4.5ins - 1.5mm in our scale. For a simple 3 link coupling and for 'Instanter' links, a short body of 12 inches is normal. But where screw links and vacuum connections are required, the buffer has to be longer. In older coaches where the body curves under at the ends, even longer buffers may be needed. For short 4-wheel wagons, the standard buffer head is 12inches diameter, but for longer vehicles, and bogie types, the end swing is greater then 13 or more, to 17 inch heads may be required. Some companies clipped the top and bottom edges, but most commonly the heads are of oval shape. You can reproduce this by filing the buffer heads, and using the projection of the shank behind the buffer beam, to stop the head from turning, by means of suitable guides. However a range of 'stick on' etched heads are being developed, which will fit over the basic 12 inch head.
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