Bean Force
A force multiplier – also known as a power multiplier – is a mechanical device that turns a small force into a much larger one. Here is how it works, which types exist and when our Bean Force is the right choice, delivering up to 10 times the force in just a few centimetres.
A force multiplier amplifies the force available at the input – a spring, a cylinder, a small actuator – by exploiting a mechanical principle: lever, toggle, wedge or hydraulic pressure. In exchange for the greater force, the stroke becomes shorter: mechanical work is conserved, and the force is concentrated where it is needed.
In commercial terms you will also find power multiplier, force amplifier, intensifier (for hydraulic and pneumo-hydraulic systems) and torque multiplier (for nutrunners, which however multiply a torque, not a linear force).
Two arms of different lengths: simple, robust, constant ratio. This is the principle behind Bean Force.
Force that increases towards the end of the stroke, typical of presses and manual clamps.
Transforms and redirects the force, used in cam dies.
Multiplies pressure (intensifiers): requires a circuit, fluid and maintenance.
| Solution | Strengths | Limitations |
|---|---|---|
| Larger spring | Simple | High bulk and weight |
| Hydraulic cylinder or intensifier | Very high forces | Power unit, hoses, maintenance |
| Toggle | Maximum force at the end of the stroke | Force varies along the stroke |
| Bean Force (lever) | Up to 10×, compact, force opposing the load, zero-force release | Must be sized for the application |
Bean Force is the mechanical force multiplier designed by Cidonio Stampi. It takes the force of a gas spring, mechanical spring or elastomer and multiplies it up to 10 times using a lever principle.
Upward blanking and forming, several operations in a single die.
High closing and sealing forces with smaller actuators.
Seismic protection at the base of racking and steel structures, capable of absorbing large forces.
Clamping with multiplied force and controlled release.
Force concentrated at the end of the stroke on light-duty presses.
Wherever an available force needs to be multiplied and reversed.
It is a mechanical device that amplifies an input force, for example from a spring or a cylinder, using a lever, a toggle, a wedge or hydraulic pressure.
In everyday language, yes: both refer to a device that increases the available force. A torque multiplier, on the other hand, increases a torque and is used with nutrunners.
Up to 10 times the initial force, depending on the configuration and the space available.
An intensifier multiplies the pressure of a fluid and requires a circuit and maintenance; the Bean Force is purely mechanical and starts from a spring.
In the opposite direction to the initial load: in a vertical press it acts from the bottom upwards.
Yes: high-pressure valves, seismic dampers for racking and steel structures, clamping, riveting and special machines are applications we can assess together.
No, it also works with mechanical springs or elastomers.
Application sizes start from 50 × 50 or 60 × 60 mm, also with multiple springs or cylinders.
Send us a drawing or description with the required force, stroke and available space: our engineering department will reply within 24 working hours.
Tell us about your application – die, valve, structure or machine – with the required force, stroke and envelope dimensions: we will assess Bean Force and get back to you within 24 working hours.
Send us your drawing. Technical reply within 24 hours.
Talk directly to the people who design and build your die: no middlemen, reliable lead times and certified quality since 1969.
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