Hydraulic Center Hole Jack
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Hollow hydraulic cylinder jack for anchorage pull-out testing and tensioning applications
- Max. Lifting Capacity 200 T
- Stroke 200 mm
- Max. Working Pressure 63.7 MPa
The hydraulic center-hole jack features a hollow plunger design, with center hole diameters ranging from 18 mm to 120 mm depending on the tonnage. It is used for anchor bolt tension testing, anchor rod installation, and similar applications. When paired with an intelligent digital pressure gauge, high-pressure hose with quick connectors, anchorage tools, and a portable carrying case, it forms a complete high-tonnage anchor pull-out testing system.
Technical Parameters
| Model | Lifting Capacity (T) | Stroke (mm) | Outer Diameter (mm) | Inner Diameter (mm) | Rod Diameter (mm) | Center Hole Diameter (mm) | Height (mm) | Working Pressure (MPa) | Weight (kg) |
| | 50 | 120 | 159 | 125 | 105 | 60 | 245 | 63.7 | 25 |
| | 60 | 200 | 203 | 160 | 130 | 90 | 360 | 52.5 | 55 |
| | 65 | 200 | 203 | 160 | 130 | 90 | 360 | 57.5 | 55 |
| | 100 | 140 | 245 | 180 | 150 | 86 | 300 | 62.75 | 75 |
| | 100 | 200 | 273 | 200 | 170 | 120 | 365 | 62.45 | 110 |
| | 150 | 200 | 273 | 220 | 180 | 90 | 365 | 52.7 | 120 |
| | 200 | 200 | 325 | 250 | 200 | 120 | 370 | 51 | 155 |
Features
- Hollow design: Central through-hole structure allows steel bars, threaded rods, or cables to pass through.
- Tensioning function: Designed specifically for tensioning prestressed anchors, steel tendons, or reinforcing bars.
- Controlled return: Equipped with a double-acting cylinder for active and safe controlled return.
- Optional long stroke: Available in multiple stroke specifications to meet large-displacement lifting requirements.
- Easy installation: The jack can be directly fitted over the workpiece without requiring complex supports.
- Multi-functional: Widely used in prestressed engineering, equipment installation, lifting, pushing, clamping, and testing applications.