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Hard Rock Drills

We have the experience in rebuilding transmissions on P&H 120/320 & BE 49/CAT MD6640 drills.

Pit Viper Rotary Transmission
Pit Viper Rotary Transmission
Rock Drill

Our Experience

United Gear’s mining beginnings included gearbox rebuilds on P&H and CAT hard rock drills. Whether propel, pump drive, rotary, or pulldown we have accumulated the experience to rebuild the key transmissions on P&H 120/320 and BE 49/CAT MD6640 series drills.

Drill Double Internal Ring Gear

Suggested Upgrades

Shown is a double internal ring gear in production for a Bucyrus 49R propel. Given the number of 49R propel rebuilds, we have determined the optimal material and tooth geometry to improve reliability and extend life.

  • All replacement components engineered to improve reliability
  • Gears manufactured to major international standards including AGMA
  • Case carburized gears for reliability

Thermal Imaging of Bucyrus 49R Final Drive

United Gear uses thermal imaging as a typical test protocol depending on the size and application of the gearbox and customer requirements.

49HR Propel Thermal Imaging

Thermal Imaging of Bucyrus 49R Final Drive

United Gear uses thermal imaging as a typical test protocol depending on the size and application of the gearbox and customer requirements.