Motor gearbox PTT-477B-0

5 - 10 kNmcombined

Overview
The PTT-477B-0 is a combination gearbox and brake designed for heavy-duty mobile mining and industrial equipment. It integrates an enclosed wet parking brake on the intermediate shaft to eliminate alignment and seal-leak issues and supports flow-through cooling. The unit preserves the same mounting footprint and gear ratios for straightforward retrofit on existing installations. PT Tech uses larger, metallurgically stronger shafts and a reinforced housing to increase strength and rigidity.

Features

• Enclosed wet brake on intermediate shaft
• Eliminates alignment and seal leakage issues
• Allows flow-through cooling
• Same brake regardless of gearbox ratio
• Easy brake maintenance
• Excellent thermal capacity
• Increased durability

Additional features

• Bigger shafts
• Metallurgically stronger shaft material
• Improved housing for greater strength and rigidity
• Retrofits old gearboxes easily
• Same mounting footprint
• Same ratios

Technical specifications

• Gear Ratio: 4.56:1
• Parking Brake Torque: 5,050 lb·ft (6,847 Nm)
• Service Brake Torque at 1,300 psi: 3,025 lb·ft
• Min. Parking Brake Release Pressure: 1,000 psi (68.9 bar)
• Max. Parking Brake Release Pressure: 1,500 psi
• Horsepower at 1,500 rpm: 75 HP (55.9 kW)