The WP-10 Balancer is a device designed to relieve the weight of hand-held tools, making their use, as well as that of simple multi-fixtured tools, significantly easier. It achieves this by providing a nearly constant retraction force over its entire wire extension length, with the load range varying depending on the specific model.
Function Description:
The core function of the balancer is to counteract the weight of an attached tool, allowing the operator to maneuver the tool with less effort. This is achieved through an internal spring mechanism that provides the lifting force. The balancer features an endless screw for adjusting the workload, enabling fine-tuning of the counterbalance weight to match the specific tool being used. Turning the endless screw in the minus (-) direction reduces the workload, while turning it in the plus (+) direction increases it. A drum lock mechanism allows the wire drum to be blocked, facilitating wire replacement without needing to decrease the spring tension. The balancer is designed for easy installation, ensuring it can be aligned and moved freely without additional force on the wire. It also includes an auxiliary chain for safety and stability during installation.
Important Technical Specifications:
The WP-10 series balancers come in various models, each with specific lifting capacities and weights. All models share a cable/hose travel of 2 meters and a static test coefficient of 1.5.
- WP 10-3 (Product no. 8202077900): Lifting capacity 3-5 kg, Weight 2.9 kg.
- WP 10-4.5 (Product no. 8202077901): Lifting capacity 4.5-7 kg, Weight 3.1 kg.
- WP 10-6 (Product no. 8202077902): Lifting capacity 6-10 kg, Weight 3.2 kg.
- WP 10-9 (Product no. 8202077903): Lifting capacity 9-14 kg, Weight 3.4 kg.
- WP 10-13 (Product no. 8202077904): Lifting capacity 13-17 kg, Weight 3.6 kg.
- WP 10-16 (Product no. 8202077905): Lifting capacity 16-21 kg, Weight 3.8 kg.
The minimum distance between the wire clamp and the wire wedge is 100 mm. The permitted maximum falling distance for the auxiliary chain is 100 mm.
Usage Features:
- Workload Adjustment: The balancer's workload can be easily adjusted using an endless screw. For WP10 models, a socket wrench is used to turn the endless screw. This allows the user to precisely match the counterbalance to the tool's weight.
- Wire Length Adjustment: For WP models with a wedge adjustment at the lower attachment point, the wire length can be adjusted to suit on-site circumstances. This involves removing the clamp, adjusting the wire, ensuring a minimum distance of 100 mm between the clamp and wedge, re-attaching the clamp, tightening the wire end with a ferrule or clamp, and cutting off any excess wire.
- Wire Extension Length Adjustment: The wire extension length can also be adjusted by loosening the wire clamp, moving the wire clamp and wire stop buffer to the desired position, and then tightening the wire clamp. Users are cautioned not to pull on the wire when the end stop is reached to prevent damage.
- Wire Drum Locking: A drum lock feature allows the wire drum to be locked, which is crucial for safe wire replacement without releasing spring tension. This is activated by pushing and turning a fixing pin 90° with a flat screwdriver.
- Installation: The balancer should be installed in a way that allows for easy alignment and movement, ensuring the wire can move freely. An auxiliary chain is supplied and must be installed, ensuring it is neither too long nor too short to interfere with the balancer's operation. The workload is attached to a snap hook at the cable end.
Maintenance Features:
Regular servicing and inspections are vital for the balancer's longevity and safe operation, and should be performed by an authorized workshop or qualified service technician.
- Daily Visual Inspection: Users should visually inspect the suspension, safety chain, snap hook, and wire for any signs of damage or wear. Signs of wire damage include broken strands, cage type bulging, or flattened places/abrasion.
- Monthly Inspection and Lubrication: A monthly visual inspection of the equipment for damage and wear is recommended. Additionally, external moving parts, friction points on the suspension, and the snap hook should be lubricated with non-corrosive grease.
- Yearly Visual Inspection: A yearly visual inspection of the equipment for damage and wear is also required.
- Wire Replacement: The wire can be replaced without dismantling the balancer or releasing spring tension. This involves fully retracting the wire, locking the wire drum (crucially, without changing the workload weight), removing the workload, pulling out the old wire end, removing the locking bush, pushing the new replacement cable through the housing, attaching the locking bush, pushing the wire back into the housing, attaching the workload, and finally unlocking the wire drum.
- Wire Drum Replacement: This is a more involved process requiring dismantling the balancer. It includes retracting the wire, disconnecting the workload and balancer, decreasing spring tension to a minimum, removing covers, circlips, and the wire drum assembly, unwinding the old wire, and then assembling with the new drum.
- Spring Replacement: Similar to wire drum replacement, this requires dismantling the balancer. The process involves retracting the wire, disconnecting the workload and balancer, fully decreasing spring tension, removing covers, pushing out the spring fracture safety device pin (if present), removing the old spring, and then assembling with the new spring. If a different spring tension is used, the nameplate must be replaced. New washers and threadlocker are recommended for screws during reassembly.
- Balancer Housing Replacement: This also involves a full dismantling and reassembly process, including removing the wire, suspension, and all internal components before replacing the housing.
Atlas Copco emphasizes the use of original parts from approved distributors or service centers for replacements to ensure safety and maintain warranty validity. The warranty for the product is 12 months after first use, or 13 months after delivery, whichever comes first, and does not cover normal wear and tear or damage due to inadequate maintenance or unauthorized repairs.
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