Today the smokebox door was made. The blank was oxy cut from flat bar with my circle cutting attachment for the oxy. Then the blank set up in the lathe using a dead centre and dial indicator to set up the blank.
A radius bar was made from some rod, thanks to a simple technique by John Lyons in the West Ryde club newsletter. The door is bored at the back to be able to grip from the inside and the outer diameter has a locating spigot to center the door on the smoke box.
To form the radius a couple of heavy centre pops were made on the lathe headstock and cross slide and a radius bar made to correct length. Power feed the cross slide into the work and the carriage will move backwards and form the radius at the same time. A clever trick and works a treat!
Happy steaming!
Nigel
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