- Pins and bushings are precision-machined, induction-hardened, and sealed from abrasives. - Track links are forged from a special boron-steel alloy and deepinduction-hardened. - Front idlers are induction-hardened on the tread for a long life. - Carrier rollers are induction-hardened. - Specification Overall Length : 98.3~147.8 inch Track Height : 24.4~28.7 inch Sprocket Pitch Diameter : 18~23 inch Carriage Weight : 3,042~4,630 lb Excavator Dumper : 12,125~29,762 lb Drill Rig with Outrigger : 19,400~47,620 lb Final Drive Torque : 5,618~13,347 lbf.ft Travel Speed : 2.1~5.3 kmf.hour