Detailed Product Introduction
This NOV ST-80 Iron Roughneck parts collection includes all mission-critical hydraulic and mechanical components for the rig’s core operating systems: right torque cylinder gland kits, rod clevises, cylinder rods, left torque cylinder guards, left/right transmission housing hinge lock pins, hinge pins, lower jaw clamp cylinder pins, clamp cylinder glands, retaining rings, tall/short wear rings, and rod-piston assemblies. Each component is cross-referenced to original NOV part numbers and Magic Industries OEM specifications, ensuring perfect drop-in fit for the ST-80 model with zero modification required. All parts undergo strict Class A quality testing to match the durability and performance of factory-installed components.
The catalog focuses on the highest-failure points of the NOV ST-80 Iron Roughneck, including hydraulic cylinder sealing systems, mechanical linkage pins, and wear-resistant components that endure constant friction and hydraulic pressure during pipe handling.
Functional Performance & Value Highlights
- Eliminate Hydraulic Leakage: Precision-machined glands and high-grade wear rings create a tight hydraulic seal, stopping fluid leaks and maintaining consistent cylinder pressure.
- Reduce Rig Downtime: OEM-matched components cut repair and replacement time by 70%, minimizing delays in pipe makeup and breakout operations.
- Extended Service Life: Wear-resistant, heat-treated materials withstand up to 25,000 pipe handling cycles, lowering replacement frequency and long-term maintenance costs.
- Perfect Alignment Guarantee: Exact OEM tolerances ensure proper linkage and cylinder alignment, preventing jamming and premature component failure.
Structural & Engineering Features
- NOV ST-80 Exact Drop-In Fit: All components machined to OEM dimensions for seamless installation, no custom machining or adjustment needed.
- High-Strength Material Construction: Forged steel pins, wear-resistant alloy rings, and precision-molded sealing components resist hydraulic pressure, friction, and corrosion.
- Class A QA/QC Certification: Every part passes rigorous quality testing to meet NOV’s strict performance and safety standards.
- Modular Assembly Design: Pre-matched gland kits and rod-piston assemblies streamline repairs, allowing quick on-rig replacements.
Applicable Operating Conditions
- These NOV ST-80 Iron Roughneck parts are built for demanding onshore and offshore drilling environments where automated pipe handling is critical, including:
- Routine drilling pipe makeup and breakout operations
- Well completion and workover activities with high-cycle pipe handling
- Hydraulically operated NOV ST-80 Iron Roughneck systems
- Harsh rig conditions with dust, drilling mud, and continuous vibration
- API 7K compliant automated pipe handling equipment
Professional Maintenance & Troubleshooting Recommendations
- Cylinder Seal Inspection: Check glands and wear rings for wear or damage every 5,000 pipe handling cycles; replace worn components immediately to prevent hydraulic leakage.
- Pin & Linkage Lubrication: Lubricate hinge pins and lock pins weekly to reduce friction and prevent seizing during operation.
- Wear Ring Replacement Protocol: Replace tall and short wear rings when thickness is reduced by 40% to maintain proper cylinder alignment.
- Hydraulic Pressure Testing: Test cylinder pressure after repairs to ensure sealing integrity and optimal performance.
- Scheduled Overhaul Intervals: Overhaul torque and clamp cylinders every 20,000 cycles to prevent catastrophic failure mid-operation.
We supply the following spare parts:
| no. | Description | MFR | Part number |
| 1 | KIT: GLAND, USE W/ TORQUE CYLINDER RIGHT, FOR NOV IRON ROUGHNECK MODEL: ST-80, QA/QC CERTIFICATION: A | MAGIC INDUSTRIES INC | ST841271795-5 |
| 2 | CLEVIS: ROD, USE W/ TORQUE CYLINDER RIGHT, FOR NOV IRON ROUGHNECK MODEL: ST-80, QA/QC CERTIFICATION: A | MAGIC INDUSTRIES INC | ST841271795-30 |
| 3 | ROD: CYLINDER, USE W/ TORQUE CYLINDER RIGHT, FOR NOV IRON ROUGHNECK MODEL: ST-80, QA/QC CERTIFICATION: A | MAGIC INDUSTRIES INC | ST841271795-1 |
| 4 | GUARD: USE W/ TORQUE CYLINDER LEFT, FOR NOV IRON ROUGHNECK MODEL: ST-80, QA/QC CERTIFICATION: A | MAGIC INDUSTRIES INC | ST841281015 |
| 5 | LOCK: PIN, HINGE, RIGHT HAND, USE W/ TRANSMISSION HOUSING ASSEMBLY, FOR NOV IRON ROUGHNECK MODEL: ST-80, QA/QC CERTIFICATION: A | MAGIC INDUSTRIES INC | ST8N475111888-R |
| 6 | LOCK: PIN, HINGE, LEFT HAND, USE W/ TRANSMISSION HOUSING ASSEMBLY, FOR NOV IRON ROUGHNECK MODEL: ST-80, QA/QC CERTIFICATION: A | MAGIC INDUSTRIES INC | ST8N475111888-L |
| 7 | PIN: HINGE, USE W/ TRANSMISSION HOUSING ASSEMBLY, FOR NOV IRON ROUGHNECK MODEL: ST-80, QA/QC CERTIFICATION: A | MAGIC INDUSTRIES INC | ST841271723-M |
| 8 | PIN: NEW STYLE, USE W/ LOWER JAW CLAMP CYLINDER, FOR NOV IRON ROUGHNECK MODEL: ST-80, QA/QC CERTIFICATION: A | MAGIC INDUSTRIES INC | ST841285220M |
| 9 | GLAND: USE W/ CLAMP CYLINDER, FOR NOV IRON ROUGHNECK MODEL: ST-80, QA/QC CERTIFICATION: A | MAGIC INDUSTRIES INC | ST841287571 |
| 10 | RING, RETAINING: SNAP, GLAND, USE W/ CLAMP CYLINDER, FOR NOV IRON ROUGHNECK MODEL: ST-80, QA/QC CERTIFICATION: A | MAGIC INDUSTRIES INC | ST897850 |
| 11 | RING, WEAR: TALL, USE W/ CLAMP CYLINDER, FOR NOV IRON ROUGHNECK MODEL: ST-80, QA/QC CERTIFICATION: A | MAGIC INDUSTRIES INC | ST841271555-22 |
| 12 | RING, WEAR: SHORT, USE W/ CLAMP CYLINDER, FOR NOV IRON ROUGHNECK MODEL: ST-80, QA/QC CERTIFICATION: A | MAGIC INDUSTRIES INC | ST841271555-21 |
| 13 | ASSEMBLY: ROD AND PISTON, USE W/ CLAMP CYLINDER, FOR NOV IRON ROUGHNECK MODEL: ST-80, QA/QC CERTIFICATION: A | MAGIC INDUSTRIES INC | ST841287560 |
Field Iron Roughneck Fault Repair Cases
Case 1: ST-80 Torque Cylinder Hydraulic Leak
A NOV ST-80 Iron Roughneck experienced severe hydraulic fluid leakage from the right torque cylinder due to a worn gland. Installing the OEM ST841271795-5 gland kit eliminated leaks, restoring full hydraulic pressure and resuming pipe breakout operations.
Case 2: Clamp Cylinder Misalignment
The lower jaw clamp failed to grip pipe properly due to worn short and tall wear rings. Replacing the ST841271555-21 short wear ring and ST841271555-22 tall wear ring fixed alignment issues, ensuring consistent pipe clamping.
Case 3: Transmission Housing Hinge Pin Failure
The ST-80 transmission housing jammed due to a damaged right-hand hinge lock pin. Swapping in the OEM ST8N475111888-R lock pin restored smooth housing movement, allowing normal pipe handling to resume.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts compatible only with the NOV ST-80 Iron Roughneck? | Yes, all components are custom-designed exclusively for the NOV ST-80 model and will not fit other Iron Roughneck models, ensuring perfect OEM fit and performance. |
| Do these parts include official QA/QC certification? | Absolutely, every component in this list includes Class A QA/QC certification, meeting NOV’s strict quality and safety standards for drilling equipment. |
| Can I purchase individual parts or only full assemblies? | Parts are available as individual components (pins, rings, glands) and complete assemblies (rod-piston, gland kits), supporting both minor repairs and full cylinder overhauls. |
Procurement Guidance & Call to Action
For drilling rig maintenance supervisors, well service operations managers, and oilfield procurement teams relying on the NOV ST-80 Iron Roughneck, this parts list is the definitive resource to minimize downtime, uphold API safety standards, and source guaranteed OEM-compatible components. Avoid the risks of substandard generic parts, costly cylinder failures, and delayed pipe handling operations — this catalog provides a standardized procurement benchmark and technical repair reference for all critical ST-80 Iron Roughneck components.
Secure these high-quality, certified NOV ST-80 Iron Roughneck parts to execute fast, reliable on-site repairs, maintain consistent hydraulic performance, and protect your automated pipe handling equipment from premature wear. Each component is built to withstand the rigors of 24/7 drilling operations, making this the trusted choice for keeping your ST-80 Iron Roughneck operating at peak efficiency.
