Design Specification

Footprint: 21′-4″ by 28′-8″
Footprint Bearing Area: 84.67 sq. ft.
Reel Diameter: 28′ outside, Max. 30′ , Min. 22′ .
Reel Width: 16′-5″ inside, 8″ flanges.
Torque: 44,400 ft.-lb. continuous, 58,000 ft.-lb. intermittent
Working Pressure: 3000 psi continuous, 5000 psi intermittent
Roller diameter: 24″
Roller Speed: 0.25-50 RPM
Gear reduction: 53:1 reduction, with fail-safe hydraulic brake

System Weights

• Component weight each weight per 2 assembly
• Corner block 6,000 12,000
• Carriage 3,380 6,760
• Roller Weldment 1700 3,400
• Bearings 150 600
• Motor/Brakes/Gears 1200 2400
• Hyd. Cylinders 900 1800
• Center beam 3200 3200
• Adjoining Pipe 1300
• Pull Down Device 2500
• Total per Assembled Half ( note 1) 30,160
• Total Est. complete Underroller Assembly 67,920

* Note 1. Does not include weight of pull down device

Operating Condition / Engineering Loads
The Under Roller System has been designed and manufactured for use both on land and offshore. The following parameters were used for the design:

• Environment: Indoor and Outdoor, 100% humidity, NEMA 4,4X.
• Temperature: 10 – 130 degrees Fahrenheit (ambient tropical)
• Loads: .75G lateral direction, 1.5G vertical direction, 30o vessel roll.
• Maximum Reel Weight: 300 US Tons, equally distributed.
• Pull-Down System
• The Pull-Down System can be pinned to the side beam of the Under Roller to add virtual load to the reel.
• Pull Capacity: 150,000 lbs. per side @ 3000 psi
• Wire Rope: 1.50 dia. 6 x 41 construction, 404.0″ ID choke
• Hydraulic Power Unit (HPU) Also see section 5 for additional HPU details
• Working Pressure: 3000 psi
• Electrical: 460v, 3 Phase, with soft start, (2) 100 Hp motors
• General: (2) Swash plate pumps (for drive rollers) (1) positive displacement pump (for cylinders)
• Controls: Pneumatic, on detachable console
• Hoses: 50 Ft. length
• Oil and Reservoir: ISO 32 Hydraulic Oil, 125 Gallon capacity.