Moving on ! Turning the piston to fit neatly into the bored head of the cylinder:
And using the chucking piece to turn the crosshead down to fit into the standard:
Tapping the crosshead for the piston connecting rod – started by supporting with the tailstock to get it concentric, although you can’t see that here:
Using the corresponding die to cut the thread on the piston connecting rod – my pratt burnerd chuck is adequately accurate for this – alternatively a bush to hold the rod could have been made from scrap brass.
Completed assembly – I’ve followed the advice from the Pengwern book – cutting one fairly deep groove in the piston for graphited packing rather than 3 finer oil grooves.
