1. TMC ( T echno M aterial C orp.) Development of New Joint Bush for Front of Excavator

2. TMC ( T echno M aterial C orp.) Joint Bush Application for Excavator Steel Backed Sintered Bush(11) ▶ Backed Steel : High load capacity at low speed ( Max Contact Pressure : 900kg/cm 2 ) ▶ Sintered layer : Oil impregnated self lubricating ( Grease up Intervals : Con. 10hrs => New 250hrs ) Joint section (pin & bush)

3. TMC ( T echno M aterial C orp.) Characteristics of Steel Backed Sintered Bush Backed Steel Bonding layer Sintered Layer ■ Sintered Layer : Martensitic Fe-Cu-Solid lubricant Sintered materials (Hard particle: Min HV650) ■ Mechanical properties Hardness Sintered layer Min HRB 60 Backed Steel Min HRC 30 Impregnation OilMin 15vol%

4. TMC ( T echno M aterial C orp.) Result of Rig Test Steel Backed Sintered Bush High Strength Brass Bush(HBsC4)

5. TMC ( T echno M aterial C orp.) Durability Test of Joint Bush Test Machine(30ton) Sintered BushCounter Pin

6. TMC ( T echno M aterial C orp.) Applications of Steel Backed Sintered Bush 15001000 Allowable max PV Value (kgf/ ㎠ m/min) 6030 Allowable max velocity (m/min) 900500 Allowable max contact pressure (kgf/ ㎠ ) -40~150 Service temperature ( ℃ ) Periodic lubrication Dry Lubrication conditions -. Excavator -. Wheel Loader -. Injection Molding Machine -. Dump Truck and truck cranes -. Bulldozer -. Arm of a crane -. Vertical cam on a press mold -. Water wheel guide vanes in hydroelectric power generation -. loader pin on a marine crane -. Industrial robots ■ Service Range ■ Applications

7. TMC ( T echno M aterial C orp.) Applications of Steel Backed Sintered Bush Excavator Wheel Loader Dump Truck Crane