Hydraulics and pneumatics

A hydraulic system often works at pressures of several hundred bar and undergoes frequent thermal cycling as the oil heats up during operation and cools at standstill. Those cycles expand and contract the material, and a component correct at 20 degrees can behave differently at operating temperature. We account for that by choosing materials and tolerances that keep function stable across the relevant temperature range.

Pressure spikes and pulsating load are another reality in hydraulic systems, placing demands on fatigue strength in critical geometries such as bores and threads. We avoid sharp internal corners where possible and use radii that reduce stress concentration without compromising the function the component must fulfil.

Hydraulic components are often mounted close to heat sources such as motors and pumps, which demands material stability at elevated temperature over long periods. We advise on material choice when we see that a component's position in the system creates an operating environment harsher than a standard solution is rated for.

In hydraulic components, quality is rarely decided by a single measurement, but by the interplay of several critical dimensions: bore diameter, seal groove surface, flange flatness and perpendicularity between two axes. We produce measurement reports covering exactly the dimensions that matter for sealing and function, rather than a generic report that misses what could actually go wrong.

In large series, statistical process control is used on critical dimensions, with results made available to the customer on an ongoing basis. That lets the customer's quality department track a process over time and react if a trend starts moving toward the tolerance limit, rather than only checking a single measurement point at delivery.

For customers with their own supplier-approval requirements, we provide the documentation needed to pass an initial audit, including material certificates, process specifications and examples of past measurement reports, so the approval process can proceed without unnecessary delay.

Hydraulic systems are often designed with long tolerance chains, where several components from different suppliers must work together for the system to seal and function as intended. We like to be involved early in that process, pointing out which geometries are expensive to hold tight and suggesting alternative solutions that give the same function at a lower cost.

Confidentiality is central to that cooperation, because hydraulic systems often contain the functional core of a product the customer does not want to share widely. We sign confidentiality agreements before drawings are sent and store customer material separately from other jobs with role-based access internally.

We never reuse a customer's specific geometry or process experience on another job, even when two customers work within the same part of the hydraulics industry. That strict separation is a precondition for customers with competing products both being able to use us as a supplier without concern.