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SGPC1250 Arm / Stick Cylinder 21N-63-03121 / 707-01-0CA41
SGPC1250 Arm / Stick Cylinder 21N-63-03121 / 707-01-0CA41
Heavy-Duty Arm & Stick Cylinders for Komatsu PC1250 Series.
Part Numbers: 21N-63-03121, 707-01-0CA41.
Versatility: Solutions for both Backhoe (Stick) and Front Shovel (Arm) configurations.
Durability: Mining-grade hardened rod for high impact.
Fitment: Direct OEM Replacement.
Warranty: 1 Year Factory Warranty.
The SGPC1250 Arm Cylinder (Stick Cylinder) is a heavy-duty hydraulic replacement engineered for the Komatsu PC1250-7 and PC1250-8 mining excavators. This comprehensive product line covers multiple OEM specifications, including 21N-63-03121 and 707-01-0CA41, ensuring we have the right cylinder for your specific machine configuration.
Whether you are operating a Backhoe (Standard Boom) for mass excavation or a Front Shovel (Loading Shovel) for face loading, SEIGO Machinery manufactures these cylinders to handle the immense crowding forces and high-impact vibrations typical of 100-ton class mining machines.
Technical Specifications
| Feature | Specification |
| Compatible Part Numbers | 21N-63-03121 / 707-01-0CA41 |
| Machine Compatibility | Komatsu PC1250-7, PC1250-8, PC1250SP-8 |
| Configurations | Supports Backhoe Stick & Front Shovel Arm Specs |
| Position | Arm Cylinder / Stick Cylinder |
| Rod Material | 42CrMo4 Induction Hardened (Rock Impact Resistant) |
| Sealing System | NOK / Parker (High-Pressure & Dust Proof) |
| Tube Material | ST52 / E355 High-Tensile Honed Tube |
| Warranty | 12 Months / 2000 Hours |
| Condition | 100% New Manufacturing |
Key Features & Mining Performance
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Dual Configuration Support: We supply exact-fit replacements for both standard stick cylinders (Backhoe) and heavy-duty arm cylinders (Front Shovel), allowing fleet managers to source all PC1250 hydraulic components from a single trusted manufacturer.
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Superior Rod Strength: The piston rods are manufactured from quenched and tempered 42CrMo4 steel with deep induction hardening. This ensures the stick cylinder resists bending during deep digging and the shovel arm withstands face impact.
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Extended Seal Life: Equipped with premium NOK buffer rings and U-cups, our cylinders are designed to prevent internal bypassing even under the extreme pressure spikes of “crowding” hard rock.
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OEM Dimensional Accuracy: Strictly machined to OEM pin-to-pin dimensions and port locations for 21N-63-03121 and 707-01-0CA41, ensuring a hassle-free installation.
Applications
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Open-pit mining (Coal, Iron, Copper)
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Quarry mass excavation
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Overburden removal
