PT Tech PTT-477 Series Gearbox/Brake Combination

PT Tech PTT-477 Series Gearbox/Brake Combination

PT Tech is known in the coal industry for its limiters and enclosed brakes. In other markets PT Tech is also known for its gearboxes. Now you can have the best of both worlds with the PT Tech PTT-477 Series Gearbox/Brake Combination.

Name Gear Ration Parking Brake Torque Service Brake Torque at 1300 Min. Parking Brake Release Pressure Max. Parking Brake Release Pressure Horsepower at 1500 RPM
PTT-477A-0 3.35:1 3,710 lb/ft 2,222 lb/ft 1,000 psi 1,500 psi 75 hp
PTT-477B-0 4.56:1 5,050 lb/ft 3,025 lb/ft 1,000 psi 1,500 psi 75 hp
PTT-477C-0 5.81:1 6,435 lb/ft 3,025 lb/ft 1,000 psi 1,500 psi 75 hp
  • Scoops
  • Shield Haulers
  • Enclosed Wet Brake on Intermediate Shaft
  • Eliminates alignment and leaky seal issues
  • Excellent thermal capacity
  • Allows for flow through cooling
  • Same brake regardless of gearbox ratio
  • Bigger shafts
  • Brake maintenance is easy
  • Improved housing for greater strength and rigiditys
  • Retrofits Old Gearboxe
  • Increased Durability
  • Metalurgically stronger shaft material
  • Same ratios
  • Same mounting footprint