Pulling Swivel 440 Tonne
Axial load/pullback rating/Working Load Limit (WLL) - ~ ≥ 440 tonnes (≈ 4,320 kN) or more, with safety margin
Torque rating - 10s to 100s of kN·m (or many thousands ft·lbs)
Minimum Break Load (MBL): ≥ 1,320 tonnes (≈ 13,000 kN)
(Safety factor = 3.0× on WLL for HDD pulling. Higher SF optional—see Options.)Peak/Transient Overload Capacity: 1.2× WLL for ≤ 10 s (non-repeating)
Maximum Permissible Torque Through Swivel: 120 kN·m (88,500 ft·lbf)
(Swivel is intended to decouple rotation; this is the torque the bearings can resist without damage.)Misalignment / Side-Load Endurance: 2% of WLL as radial load without brinelling (≤ 86 kN radial)
Max Service Speed (Rotation under load): 5 rpm continuous at WLL
Temperature Range (standard seals): −20 °C to +80 °C (−4 °F to +176 °F)
Bearing type & arrangement - Heavy thrust ball bearings or roller thrust bearings, possibly multiple rows
Sealing & lubrication - Greaseable seals, or heavy duty seals to exclude mud, grit, bentonite
Materials & construction - High strength alloy steel (for body, pins, eyes), hardened bearing races, corrosion protection (e.g. coatings)
Connection ends - Large pins with safety locking