The drive wheel rim engages with the track links to transmit power while enduring track tension and ground impact loads. Its primary operational challenges are abrasive wear and cyclic loading.
Forged rims demonstrate 2-3x longer service life versus cast alternatives by eliminating porosity and achieving uniform grain flow. The hardened surface layer (3-5mm depth) resists spalling even under high-track tension (typically 15-25 kN/m in 20-ton class excavators).