The firebox lap seam rivets are being replaced with copper patchscrews as the steel rivet heads have wasted away over time. Firstly the rivet is burnt out and then the hole is reamed, tapped and countersunk as shown here with Paul using the countersinking tool. The tool is guided on a shaft screwed into the hole to keep it concentric.
The firebox lap seam rivets are being replaced with copper patchscrews as the steel rivet heads have wasted away over time. Firstly the rivet is burnt out and then the hole is reamed, tapped and countersunk as shown here with Paul using the countersinking tool. The tool is guided on a shaft screwed into the hole to keep it concentric.
Credit: C.Hopkins, 17th February