Hydroservice is leader in the design and manufacturing of discs and clamping systems. Hydroservice clamping discs were created to provide easy and economic clamping systems to ensure top reliability to machine manufacturers and engineers.
Hydroservice clamping discs are the simplest and most cost-effective solution for clamping mobile devices such as slides, traverses, and wagons, ensuring maximum reliability.
Made of a bronze body and an NBR gasket joined through vulcanization, they work through fluid pressurization: the disc lifts slightly off its seat and adheres to the element to be clamped, generating the friction force needed for clamping, with no moving parts and therefore no wear.
Division:
Clamping discsCompetence:
Sales / TechnicalWould you like to find out how many discs you need for your application? Contact us now.
Materials |
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Disc body: |
Bronze |
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Gasket: |
NBR |
Technical specifications |
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Operating pressure: |
from 10 to 250 bar (depending on Ø) |
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Fluids suggested for operation: |
mineral oil |
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Suggested viscosity range: |
from 10 to 400 mm2/s |
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Temperature range: |
from -20°C to + 80°C |
Advantages
Just a 10-11 mm deep hole with H7 tolerance is enough for housing.
Engineered for pressures up to 250 bar: even the smallest discs generate considerable force.
No moving parts, so no wear from friction over time.
The gasket expands under pressure, adhering to the seat walls and excluding any leakage.
The dedicated tool (sleeve + punch) makes insertion quick and protects the gasket from damage.
Wear-resistant
The disc gasket is intentionally oversized: during assembly it is heavily preloaded, achieving strong adhesion within its housing.
This allows the clamping element to shift slightly back and forth without generating friction against the seat wall.
At first pressurization, the gasket undergoes a small elastic yield and, once the initial friction is overcome, moves until the disc rests against the surface to be clamped, thus settling into its final position. In the unclamping phase, simply releasing the pressure is enough: the disc elastically retracts by about 0.01 mm, detaching from the workpiece without any frictional contact.
This friction-free operation, combined with the absence of air pockets in the circuit (bleeding should always be provided, ideally through a vent hole at the most suitable point), ensures the disc a very long service life at peak efficiency.
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