The Ingersoll Rand SD-77DA is a robust smooth drum vibratory roller designed for high-performance soil and asphalt compaction. It features a 66-inch wide, 48.1-inch diameter drum that delivers centrifugal forces of up to 26,077.9 lbs in high mode and 5,845.1 lbs in low mode, with a nominal amplitude of 0.1 inches and vibration frequencies of 31 and 42 vibrations per minute. Powered by a Cummins B4.5T diesel engine producing 99 hp (74 kW), the roller ensures reliable and efficient operation with a maximum speed of 8.2 mph. Its hydraulic system holds 130 gallons of fluid, supporting powerful drum vibration and smooth steering. The unit has a ground clearance of 15.6 inches, overall dimensions of approximately 17.1 ft length, 6.1 ft width, and a 9.8 ft height to the top of the cab, with a wheelbase of 9.1 ft. Operating weight is 17,346 lbs, providing optimal balance between compaction force and maneuverability. The roller operates on a 12-volt system with a 95-amp alternator supply. It is engineered to deliver consistent compaction performance with advanced vibration control, making it suited for medium to large construction projects requiring reliable soil and asphalt compaction. Its durable build and hydraulic systems ensure productivity and operator comfort on various job sites.