When a component reaches assembly, it needs to fit and work as intended. A hole in the wrong position or two features that don’t quite line up can lead to rework, delays and extra costs.
Achieving that accuracy starts long before the final inspection. The way a component is held, machined and moved between operations all play a part.
Multi-axis machining helps by allowing more features to be machined without repeatedly removing and repositioning the component. Fewer setups mean fewer opportunities for variation, helping keep critical dimensions and features aligned.
At G W Martin, we use multi-axis machining alongside experienced engineers, careful programming and thorough quality control to deliver precision components. Here’s how it makes a difference…
What is multi-axis machining?
Multi-axis machining uses CNC machines with additional controlled movement beyond the three basic linear axes: X, Y and Z. Depending on the equipment, this allows the cutting tool or component to rotate, making it easier to reach different faces and machine more complex features.
The term covers several types of equipment, including four-axis machining centres, five-axis mills and multi-axis mill-turn machines.
Mill-turn machines are particularly useful for components that need both turning and milling. Rather than moving a part between separate machines, several operations can be completed within one machine.
Our CNC machining capabilities include multi-axis, twin-spindle mill-turn machines and four-axis machining centres, giving us the flexibility to choose the right approach for your project.
Fewer setups help protect accuracy
Every time a component is taken out of a machine and clamped again, its position needs to be re-established. That takes care and precision. A small difference in how the part sits, how it is aligned or how it is clamped can affect the next operation. Where tolerances are tight, these differences matter.
Multi-axis machining reduces the need for separate setups by allowing more work to be completed while the component remains securely held.
Take a part that needs a turned diameter, milled flats and drilled holes. Moving it between machines introduces several stages of handling and alignment. A suitable mill-turn machine can bring those operations together, helping maintain accuracy between the features.
There’s a practical benefit too: less handling can mean less time between operations.
Keeping related features in line
Individual dimensions are only part of the picture. Features also need to be in the right position relative to one another.
A bore might measure correctly, but if it doesn’t line up with the rest of the component, the part may still cause problems during assembly.
Machining related features within the same setup helps maintain a consistent reference point. Multi-axis machining can therefore support better control over:
- Hole positions relative to a central bore
- Alignment between turned and milled features
- Angles between machined surfaces
- Concentricity between cylindrical features
For the customer, the benefit is straightforward: components that fit together as intended, with less need for adjustment or rework.
Reaching difficult features more easily
Some components are awkward to machine because of where their features sit. Angled holes, details around a circumference or surfaces on several faces can all require extra planning. With multi-axis machining, additional movement allows the tool or workpiece to be positioned for better access.
Depending on the machine and component, this can reduce the need for complicated fixtures or separate machining stages. It also gives engineers more options for finding a stable, controlled way to make the part.
The value lies in choosing a process that can reach each feature effectively while maintaining the accuracy the drawing requires.
Making accuracy repeatable
Producing one accurate component is a good start. Maintaining that standard across a production run is what customers depend on. Multi-axis machining helps by reducing repeated manual setup tasks and providing a controlled sequence of programmed operations.
But the machine still needs a well-managed process around it. Tool wear, material behaviour, clamping and machine condition can all affect the finished component.
At G W Martin, we use CAD/CAM software to model and simulate machining operations. This supports careful programming and helps us plan production before cutting begins.
Is multi-axis machining always the best option?
Multi-axis machining is particularly useful for parts with features on several faces, complex geometry or a combination of turned and milled details. However, the right choice depends on the component. A simpler part may be manufactured accurately and efficiently on a machine with fewer axes.
We consider the material, geometry, tolerances and production quantity when deciding how to approach a job. Tooling, workholding and inspection requirements matter just as much as the machine itself.
For you, that means choosing a machining partner who understands the drawing and can recommend a practical way to achieve it.
Looking for a CNC machining partner you can trust?
When you’re sourcing precision components, you need confidence that your supplier understands what matters and can deliver consistently. At G W Martin, we combine decades of engineering experience with multi-axis machining capabilities and an ISO 9001:2015-certified quality management system. Our quality control processes help ensure components meet your specifications, giving you confidence when they reach your production line.
Whether you need a complex part, a repeat production run or advice on the best manufacturing approach, our team is ready to help.
Get in touch with our team to discuss your CNC machining requirements or send us your drawings for a quote by emailing sales@gwmartin.co.uk.
