Caterpillar Undercarriage Carrier Roller 4I7345 is hot forged in two halves to obtain best internal grain flow.
• Specific low alloyed boron steel is used to achieve high harden-ability.
• Differential quenching or through hardening heat treatment of the roller shell guarantees a rail surface with a superior wear resistance (HRC > 50); optimum core and internal shell surface hardness for extreme resistance to shock and fatigue stresses caused by the most severe applications
• Induction hardening and super finishing of the shafts
• Large bearing and bushing area for high resistance to radial loads
• Precise design and carefully manufactured for perfect alignment, perfect fit of bushings and final assembly of the components