1. Center hole.
If made with good dies, it will be clean-cut. A poor center hole may
set up additional stresses in the steel, which may cause premature
breakage.
2. Trim points.
Must be done with good equipment, to avoid cracking, chipping and
rough edges.
3. Clips.
Must be right size and shape to fit properly.
4. Eyes.
Must be:
If the eye is too small, the
bushing may be crushed when forced in. If the eye is too large, the
bushing will be loose.
- must be parallel and straight,
to avoid setting up excess stresses in the main leaf
5. Fitting of leaves must be
accurate, to avoid setting up excess stresses in steel and causing
premature breakage.
6. Leaves must be fitted side
to side, as well as surface to surface. |