Hi Howard,
The clearance of the rivet in the hole is important in a structural joint. The hole diameter should be 17/16 x the rivet diameter (i.e. d + 1/16d)
You should be able to work that backwards to the correct rivet size if you know the hole size.
The length of the rivet protruding from the surface before forming should be 1.5 x the hole diameter (1.5D).
Greig's method sounds about right but you may form a better head shape if you invest in a pair of snaps & sets.
The clearance of the rivet in the hole is important in a structural joint. The hole diameter should be 17/16 x the rivet diameter (i.e. d + 1/16d)
You should be able to work that backwards to the correct rivet size if you know the hole size.
The length of the rivet protruding from the surface before forming should be 1.5 x the hole diameter (1.5D).
Greig's method sounds about right but you may form a better head shape if you invest in a pair of snaps & sets.