Counterbalance Forklift
A forklift that balances its front load with rear counterweight, allowing direct access to racks and trailers without front support legs.
Definition
A counterbalance forklift uses rear mass to oppose the moment of a load on its forks. With no front support legs, it can approach racks, stock and trailers directly. Its versatility comes with greater vehicle weight, length, turning radius and floor-loading requirements. Combustion models suit outdoor intensive work; electric models dominate many indoor, low-noise and emission-sensitive applications.
Balance and the Stability Triangle
The front axle acts as a pivot between the load's overturning moment and the stabilizing vehicle mass. For a conventional pivoting rear axle, the support triangle joins the front wheels and rear axle pivot. The combined centre of gravity must stay inside it. Turning forces and elevated loads sharply reduce lateral stability.
Load Centre and Capacity Chart
Rated capacity assumes a specified load centre, commonly 500 mm, and stated lift conditions. Larger loads move the centre forward and increase the overturning moment. Height and mast deflection further reduce permissible load. Use the manufacturer's capacity chart for the actual combination, especially with long or unusual goods.
Combustion or Electric
Combustion trucks offer rapid refuelling and demanding outdoor capability, but produce emissions and noise and need more maintenance. Electric trucks are quieter, locally emission-free and economical to operate, but need suitable battery and charging provision. Lithium technology expands their duty range; extreme loads still require calculation against the real work profile.
Risks and Protection
Overload, abrupt turns, raised-load travel and cross-slope driving can cause overturning. Loads obscure sightlines; frequent reversing creates collision exposure. Poor fork engagement, unstable stacks and mast pinch points add risk. Speed control, pedestrian alerts, restraints, presence sensing, traffic rules and training address different hazards.
Selection
Start with the heaviest and largest load, then storage height, door limits and working aisles. Choose powertrain and tyres for floor, slope, temperature and cleanliness requirements, and energy capacity for actual shift hours. Attachments change load centre and reduce residual capacity and must be included from the outset.
Frequently Asked Questions
Can a two-tonne forklift always lift two tonnes?
No. Capacity depends on load centre, height and configuration. Check the manufacturer's capacity chart, particularly for long loads or attachments.
Why can forklifts overturn sideways?
Their support geometry and elevated combined centre of gravity leave limited lateral margin. Sharp turns, elevated loads and cross-slope travel can move the effective resultant outside the support area.
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This glossary covers general industry concepts for technical reference and knowledge sharing. It contains no proprietary information from any specific manufacturer. For equipment specifications and operating procedures, always refer to the OEM documentation.