Manual Cable Bolt Tensioner
Procurement Criteria for Off-Grid Sites
When site surveys reveal a lack of established electrical grids or pneumatic networks, sourcing a purely physical hydraulic system becomes the priority. The Manual Cable Bolt Tensioner fits this specific procurement profile. Purchasing a fully automated power pack is often financially unjustifiable for sites with low tensioning frequencies. This equipment generates the required 63 MPa preload through direct human actuation, eliminating the capital expenditure tied to complex drive motors and electronic valve groups.
Operational Mechanics and Maintenance
Constructed around a single-acting cylinder, a hand pump, and quick-change couplers, the absence of electrical relays simplifies the maintenance chain. Field crews without specialized electrical certifications can execute routine checks. For long borehole applications, the dual-stage plunger design accelerates the initial piston advancement, shifting to high-pressure output for final load application. This division of labor minimizes manual fatigue during extended pumping sequences.
Product Specifications:
|
Parameter |
Specification |
|
Rated Tensioning Force |
200 kN - 700 kN |
|
Rated Hydraulic Pressure |
63 MPa |
|
Oil Tank Capacity |
2.0 L |
|
High-Pressure Hose |
4 m / 6 m / 10 m (Optional) |
|
Core Components |
Single-acting jack, hand pump, quick couplings |
Deployment Scenarios and Emergency Reserves
Beyond standard civil foundations, this unit is frequently acquired as strategic inventory for underground mines. When primary electrical or compressed air systems experience outages, the purely mechanical nature of this tool allows roadway tensioning to proceed uninterrupted. To guarantee immediate startup after prolonged warehouse storage, the internal high-pressure elastomer seals are strictly subjected to aging and pressure-holding tests prior to factory dispatch.
Customization and Freight Packaging
Hose lengths of 4, 6, or 10 meters can be specified to match varying site geometries, while the 2.0 L tank capacity accommodates standard stroke cycles. For operators requiring extended leverage, the handle dimensions can be customized. Every unit undergoes a complete leak verification process. For international transit, the hardware is packed into solid wood crates featuring rapid-release stainless steel latches. Internal items are wrapped in shock-absorbing film and partitioned, mitigating transport damage.
Procurement Inquiries
Q1: What is the required handle stroke count to reach the maximum load?
A1: For a standard 300 kN application, roughly 15 to 20 strokes are needed for the low-pressure rapid advancement, followed by 35 to 45 strokes in the high-pressure phase to reach the target load.
Q2: What are the protocols for extended warehouse storage?
A2: Withdraw the cylinder rod completely to shield internal surfaces. Detach the handle and keep the assembly in a dry space, ensuring the high-pressure rubber seals do not contact corrosive materials.
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