Generally, there are very few cracking problems in pull rivets.
When the half hollow or solid rivet is riveted,
This is usually a few questions:
1: Material problem, rivet to choose special Rivet wire.
2: The half-hollow concentric problem, mid-air heart is not concentric partial empty also will crack.
3: Rivet head cut is very uneven.
4: Punch not aligned to Rivet center.