Supply Chain Risks in Precision Turned Parts

Recent years have shown how quickly supply chains that appeared stable can come under pressure. Pandemics, geopolitical conflicts and regional production disruptions have each exposed very different underlying vulnerabilities. In precision turned parts, this applies with particular force: raw material, manufacturing capacity, tooling and logistics can each come under strain independently — or simultaneously.

The consequences are concrete rather than abstract. A production stoppage caused by a missing turned part costs a multiple of the part price. And the time required to qualify a new supplier is simply not available when an acute failure has already occurred.

This article describes three structural sources of risk in turned parts procurement and sets out what contributes to a stable supply position — on both sides of the relationship.

Risk 1: Raw Material Shortages

Stainless steel, aluminium, brass, titanium — all of these materials are exposed to global markets. Lead times that would normally run to a few weeks can extend to several months during periods of constraint. Materials that are readily available in normal times can suddenly only be sourced at significantly higher prices.

What influences the supply position:

• Alloy specificity: The more specific the alloy, the narrower the supplier base and the greater the risk of shortage. Early alignment on material selection with the manufacturing partner can identify alternatives with better availability.
• Price volatility: Raw material prices are subject to considerable fluctuation. In long-term pricing agreements, it is worth establishing how significant raw material price movements will be handled. Index-linked price adjustment models can create transparency and planning security for both parties — for example, LME copper price for brass components (London Metal Exchange: real-time commodity prices for metals http://www.lme.com )
• Response time: A well-managed stock of commonly used materials and dimensions at the supplier can help bridge short-term shortages and reduce response times. This is a concrete, verifiable criterion in supplier selection.

Risk 2: Single-Sourcing

Single-sourcing — one supplier for one component — can be an economically efficient arrangement in stable supply conditions: less qualification effort, volume consolidation and simpler communication. The structural vulnerability only becomes apparent when that supplier fails for a reason outside anyone’s control.

What a supplier failure means in practice:

• Qualification time: First article production, inspection, approval and series launch with a new supplier can take several months. In regulated sectors such as medical technology or automotive, the timescale is frequently longer.
• Production stoppage: If the affected turned part is a bottleneck component, the line stops — until supply is restored.
• Changed procurement conditions: Short-notice replacement sourcing takes place without established processes, framework agreements or long-term negotiated terms.

What can strengthen resilience: for volume-critical or supply-critical components, dual-sourcing may be worth considering, provided the additional qualification and management effort is proportionate to the risk of failure. Internal redundancy at the existing manufacturing partner — the ability to transfer a component to a different machine without loss of quality — can be an additional safeguard.

Further readings: What buyers should consider when selecting a supplier for precision turned parts

Risk 3: Supplier Concentration

Supplier concentration is the portfolio-level counterpart to single-sourcing: when a high proportion of total turned parts volume is concentrated with a single supplier, a cluster risk arises — even if that supplier provides a range of different components.

Supplier concentration is frequently the outcome of a rational decision: the existing supplier delivers consistent quality, understands the requirements, and new components are directed there because it simplifies procurement and avoids qualification effort. This is entirely understandable — but as the volume share grows, it builds a structural risk that is difficult to reduce quickly if a disruption occurs.

What high concentration can lead to:

• Dependence on shared conditions: A high volume share amplifies the impact when prices, delivery terms or available capacity change.
• Cumulative bottleneck effect: If a heavily concentrated supplier encounters a constraint — machine failure, workforce disruption, force majeure — many different components are affected simultaneously.
• Limited room for manoeuvre: In the event of a quality problem, a short-notice switch is rarely feasible, since qualifying a new supplier takes several months.

What can strengthen resilience: a regular review of the supplier structure for concentration risks and — where economically justified — early assessment or qualification of alternative sources.

Further insights:

• BCI Supply Chain Resilience Report 2024: http://www.thebci.org/resource/bci-supply-chain-resilience-report-2024.html
• Swiss Federal Office for Economic Supply (BWL):  www.bwl.admin.ch/bwl/de/home.html

What to look for in a supply-resilient manufacturing partner

When selecting suppliers, it is worth evaluating concrete, verifiable characteristics:

• Raw material availability: Are commonly used materials and dimensions held in stock? A purposefully maintained material inventory can significantly improve response times when short-term shortages arise.
• Alternative sourcing: Have alternative sources for critical raw materials been identified and assessed?
• Machine redundancy: In the event of a machine failure, can a component be transferred to an alternative machine and produced there within the defined quality requirements? This requires documented and validated process parameters for alternative equipment.
• Capacity flexibility: What options exist to provide additional capacity at short notice, or to transfer orders to alternative machines when demand spikes or a machine is unavailable?

Further readings:

Why series stability in precision turned parts matters more than unit price

In summary: Supply chain risks develop quietly and announce themselves loudly.

Raw material shortages, single-sourcing and supplier concentration are not exotic edge cases. They arise as a by-product of economically rational decisions — and become visible when the conditions that made those decisions sensible change.

Which countermeasures make sense depends on the specific risk: raw material buffers can be valuable where lead times are long, dual-sourcing where components are critical, price adjustment mechanisms where commodities are volatile, and alternative production options where capacity is a constraint.

Supply security is not achieved through maximum redundancy, but through risks that have been consciously assessed and matched to appropriate alternatives.

If you have specific questions about raw material availability, machine base or capacity reserves, please do not hesitate to get in touch.

Frequently Asked Questions (FAQ)

What is the difference between single-sourcing and sole-sourcing?

Single-sourcing is the decision to source a component from a single supplier even though alternatives are available. Sole-sourcing arises when there is only one supplier on the market for a given component or material. Sole-sourcing is unusual for standard turned parts, but can occur with special alloys or highly specialised geometries.

How can the risk of a supplier failure be quantified?

A useful approximation: (probability of failure) × (cost of failure). The cost side includes: production stoppage until supply is restored, qualification effort for a new supplier, potential premium costs of short-notice replacement sourcing, and the indirect effort involved in communication, delivery delays and escalation.

How many suppliers should be qualified for a critical turned part?

This depends on volume, qualification effort and product lifetime. As a general guide: a component with high volume, a long qualification time and a long product lifetime may justify qualifying a second supplier. A standard part with a short qualification time can be managed with a primary supplier and a documented list of alternatives — provided that list is kept current through occasional orders.

What is a price adjustment clause and how does it work in practice?

A price adjustment clause links the unit price to a recognised raw material price index — for example, the LME copper price for brass components or a steel price index for steel components. When the raw material price rises, the unit price rises proportionally; when it falls, the unit price falls accordingly. This distributes market price risk transparently between buyer and supplier and provides planning security for both parties.

How long does it take to qualify a new turned parts supplier?

The timescale depends significantly on the component, the raw material, tooling requirements and the approval process. The quotation phase, first article production, inspection and series approval together can easily run to several months. In regulated sectors or for complex components, the timescale is frequently longer. This is why it makes sense to evaluate potential alternative suppliers before an acute need arises.

Who are Häni + Co. AG?

Häni + Co. AG is a Swiss family business based in Arch in the canton of Berne. Founded in 1939, the company has manufactured custom precision turned parts for demanding industrial applications for over 80 years. Its capabilities encompass conventional and CNC-controlled single-spindle automatics, multi-spindle machines and rotary transfer machines, together with in-house finishing operations including centreless grinding, honing, vibratory finishing and roller burnishing. Häni + Co. AG holds certifications to ISO 9001, ISO 14001, ISO 13485 and IATF 16949, and supplies customers in building services, medical technology, interconnect technology, sensor technology, robotics and automotive. Diameter range: Ø 1 to 65 mm.

Which sectors does Häni + Co. AG supply?

Building services, medical technology, interconnect technology, sensor technology, robotics, fluid technology and automotive. Typical components include shafts, axles, bushings, pinions, valve spindles, contact pins and connector elements. Swiss Precision since 1939.