NEW DESIGN and CONSTRUCTION METHOD
- Finite element analysis conducted to eliminate the inherent OEM rope drum internal stiffener cracking problem.
- Hofmann design removes all internal lateral stiffeners and increases the drum shell forging thickness to reduce stress.
- New Forged Steel drums fully fabricated using full penetration welds and then full contour induction hardened to 55 HRC for a case depth of 6mm.
- Worn Drums. All cracks removed before building up with 30mm of submerged arc welds and then induction hardening.