ATLAS COPCO 3128301389 Piston Rod Head for Simab H1252/H1254 Drill Rigs | Hydraulic Cylinder Assembly
OEM ATLAS COPCO Piston Rod Head (3128301389) for Simab H1252/H1254. 4340 chromoly steel, 250+ bar pressure rating. Precision-machined hydraulic cylinder component with Hirth coupling.
High-Pressure Hydraulic Cylinder Component
Genuine ATLAS COPCO Piston Rod Head (Part# 3128301389) is the critical load-bearing interface for Simab H1252/H1254 drill rig hydraulic cylinders. Precision-machined to maintain seal integrity under 250+ bar operating pressure in underground mining conditions.
Technical Specifications:
- ⚙️ Material: Induction-hardened 4340 chromoly steel
- 🔧 Surface Finish: 0.2μm Ra (mirror polished)
- ⛓️ Thread Type: M42×2.0 LH trapezoidal thread
- 🛡️ Hardness: 58-62 HRC core / 45-50 HRC base
- 🧰 Sealing Interface: Triple-groove design for Rod Seal Kit #31283013XX
Performance Features:
✔️ Anti-rotation key slots (Hirth-type coupling)
✔️ Pressure-balanced seal grooves
✔️ Chamfered leading edges for seal protection
✔️ Magnetic particle inspected (MPI certified)
Failure Warning:
⚠️ Damaged rod heads cause hydraulic lock at 15° boom angle, leading to cylinder buckling forces exceeding 120% rated capacity
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