When tolerances are tight and specifications are critical, machined washers are often the only choice. While stamped washers may be suitable for general use, they can fall short in high-precision environments. At Stephens Gaskets, as an experienced machined washer manufacturer, we specialise in supplying CNC-machined washers built for industries where accuracy, reliability, and repeatability are essential.
This guide explores the key differences between stamped and machined washers, why CNC machining is the preferred option for demanding applications, and what to expect when working with UK machined washer suppliers for custom solutions.
What Are Machined Washers?
Machined washers are produced through CNC (Computer Numerical Control) or lathe processes, rather than being punched or stamped from sheet metal. This allows for:
- Greater precision in dimensions and surface finish
- Tighter tolerances across both ID and OD
- Custom profiles including chamfers, grooves, and complex geometries
- Material flexibility, including exotic alloys and high-strength metals
Compared to stamped washers, CNC options offer improved fit, strength, and consistency – particularly valuable in aerospace, medical, and high – speed mechanical assemblies.
Benefits of CNC Machined Washers Over Stamped Alternatives
1. Superior Dimensional Accuracy
Machined washers can be produced to tolerances as tight as ±0.01mm, making them ideal for assemblies that require precise spacing, loading, or alignment.
2. Better Surface Finish
Stamping can create burrs, deformation, or edge irregularities. Machining results in smoother surfaces – critical when washers are used as bearing surfaces or in rotational components.
3. Greater Design Flexibility
Machining allows for custom geometries, thickness gradients, and internal features—beyond what stamping can achieve.
4. Stronger and Stress-Free
Stamped washers may suffer from work-hardening or residual stress. Machined washers retain material integrity and mechanical strength.
Applications: Where Machined Washers Excel
As a trusted machined washer manufacturer, we supply components for industries where performance is non-negotiable:
- Aerospace and defence systems
- Medical devices and diagnostics
- Precision gear assemblies and robotics
- Automotive and motorsport engineering
- Oil, gas, and petrochemical equipment
- Instrumentation and scientific equipment
In these sectors, a washer isn’t just a spacer – it’s a critical component that affects mechanical function, safety, and reliability.
Our Machined Washer Capabilities
Stephens Gaskets provides a full range of custom CNC washers and precision parts. Options include:
- Materials: Stainless steel, brass, aluminium, copper, Inconel, titanium, plastics, and more
- Thicknesses: From 0.5mm to 25mm
- OD/ID sizes: From micro to large-diameter industrial parts
- Tolerances: Down to ±0.01mm on request
- Profiles: Flat, flanged, stepped, grooved, chamfered, slotted
Whether you’re developing a new product or replacing a worn component, we can machine washers to your drawing, CAD file, or physical sample.
Visit custom CNC washers OR view the washer itself to explore your options.
Why Choose Stephens Gaskets?
As a leading UK machined washer supplier, Stephens Gaskets has over 70 years of precision engineering experience. We combine skilled CNC machining with responsive service to deliver components that meet the highest standards.
Why customers choose us:
- UK-based ISO 9001-certified production
- Custom machining to drawing, sample, or spec
- Fast turnaround and delivery options
- Expert guidance on material and design selectionv
- Trusted by OEMs, engineers, and manufacturers across sectors
From prototyping to volume production, we deliver washers that work – exactly as required.
When to Specify Machined Washers
Choose machined washers when:
- You need precision metal washers for load-critical or safety-critical applications
- The assembly requires non-standard shapes or tolerances
- The component must withstand vibration, pressure, or thermal cycling
- You’re working with exotic materials or low-volume production
- Standard stamped washers just don’t meet your spec
Our custom CNC washers are the go-to solution for exacting engineering environments.
Frequently Asked Questions
1. When should I choose a machined washer over a stamped one?
Use machined washers when you need tight tolerances, custom shapes, or high strength – especially in dynamic or critical assemblies.
2. Are machined washers more expensive?
While they may have a higher unit cost, they reduce failure rates and improve performance, offering better value in high-spec applications.
Can I get small batch or prototype runs?
Yes. Stephens Gaskets supports one-offs, small batches, and full production runs.
Do you work with exotic materials?
Absolutely. We machine washers from Inconel, titanium, phosphor bronze, and other specialist materials depending on your application needs.
Final Thoughts: Precision That Performs
Machined washers are the right choice when performance can’t be compromised. From dimensional stability to surface finish, they offer engineering confidence where it counts.
At Stephens Gaskets, we’re proud to be a specialist machined washer manufacturer for industries that demand accuracy, reliability, and flexibility. Whether you need a single prototype or a full production run, our team is here to deliver quality – every time.
Contact us today
Phone: +44 (0)121 544 5808
Email: sales@stephensgaskets.co.uk