Exploring the Cost of Poor Quality in CNC Machining

When we dig deep into the world of CNC machining, there’s an unmistakable emphasis on quality. As industry leaders, we understand the critical role quality plays, especially in areas like aerospace, where the AS9100 standard is not just a recommendation but a stringent requirement.

It’s no exaggeration to say that the success or failure of a project, and by extension, a machining business, hinges on the precision and meticulous attention to detail in its CNC machining processes.

Understanding Quality in CNC Machining

CNC machining stands as a beacon of technological advancement in the manufacturing world. At its core, quality in machining is all about precision – the kind that ensures components fit seamlessly in a high-performance jet or a life-saving medical device. For industries like aerospace, the standards are sky-high, and understandably so. After all, there’s no room for error when you’re 30,000 feet in the air or when a patient’s life hangs in the balance.

In CNC machining, every micron matters. A discrepancy, even one as tiny as a few micrometres, can render a component useless or, worse, dangerous. The majority of mechanical failures in the aerospace industry are often attributable to manufacturing discrepancies, many of which stem from lapses in machining quality.

The standards set by AS9100 for aerospace and defence manufacturers ensure that every part, every component, and every assembly meets the exacting standards that these high-stakes industries demand. When you’re sourcing parts for your projects, you’re seeking a partner who understands the profound importance of quality in CNC machining.

As industries evolve, the demand for more sophisticated and complex components increases. And with this demand comes an increased responsibility for CNC machinists to deliver perfection, every single time.

Cost of Quality in CNC Machining

When CNC machining doesn’t meet the mark, the ripple effects can be significant. Imagine an aircraft component that isn’t machined to the precise specifications required. Such an oversight could lead to system malfunctions, jeopardizing the safety of the aircraft and its passengers.

Here is a quick overview of the consequences of poor quality:

  • Increased waste and rework expenses
  • Liability issues from faulty machined components
  • Elevated costs in warranty and servicing
  • Erosion of manufacturing credibility
  • Compromised safety in final product applications
  • Lost contracts and reduced client retention

Financial Implications of Poor Quality

For many manufacturing companies, the “cost of poor quality” is a substantial drain on their resources, accounting for about 20% of total sales. Consider a company with annual revenues of $5 million. These costs encompass wasted materials, lost labour, and, most critically, lost opportunities due to dissatisfied customers.

The financial repercussions of poor quality in CNC machining are multifaceted. On the surface, there’s the immediate cost of repairing or replacing the defective part. But the hidden costs can be even more devastating. Consider the economic consequences of delayed deliveries due to reworking faulty parts. Businesses may face penalties for not meeting delivery timelines, not to mention the potential loss of future business due to a tarnished reputation.

Customer Perspective

From a customer’s viewpoint, poor quality is a breach of trust. Customers entrust machinists with their projects, expecting precision and reliability in return. When the quality is compromised, it can lead to dissatisfaction, eroding the trust built over years. Worse, businesses might find themselves facing legal consequences if their subpar machining leads to safety hazards or system failures.

Ben Machine’s Approach to Quality Assurance

Ben Machine has always been at the forefront of ensuring impeccable quality. Our expertise and unique combination of technology, inspections, and testing equipment cater to all facets of parts manufacture. With a quality system surpassing AS 9100D and ISO 9001:2015 requirements, every order undergoes a meticulous engineering evaluation process to preempt and address potential issues before production.


In the realm of inspections, our expertise shines with our 5-Axis CMM Inspections. Using advanced Coordinate Measuring Machines (CMMs) with the latest PH20 Renishaw heads, we offer true 5-axis CMM capabilities. This not only amplifies accuracy but also slashes inspection times. Our optical systems and manual inspection tools come into play for intricate parts, enabling us to inspect minutiae often beyond the CMM’s reach.