Precision plastic components and assemblies — batch machining & supply
Barair supplies precision plastic components and assemblies for industrial customers who need repeatable batch manufacture without losing the ability to iterate. We support prototype → small batch → repeatable production, combining practical design-for-manufacture input with managed machining, inspection, and assembly where required.
If you need a responsive engineering-led supplier for engineering plastics (including acetal / POM), and you want clear documentation so your team can sign-off and re-order with confidence, we can help.
What we supply
CNC-machined plastic parts (one-offs, prototypes, small/medium batches)
Assembly-ready components (defined datums, controlled fits, consistent finish)
Assembled sub-systems (e.g., bearings/bushes pressed in, simple mechanical assemblies)
Repeat-order supply with consistent inspection approach and controlled revision handling
Typical applications
We often support parts where plastics are chosen for wear, low friction, chemical compatibility, electrical insulation, or weight reduction, including:
Conveyor and material-handling components (guides, wear parts, rollers, spacers)
Industrial machine components (bushes, runners, sliding blocks, guards/insulators)
Prototype and development components where the design is still evolving
Low-to-medium volume batch parts where mould tooling isn’t justified yet
Materials (engineering plastics)
Acetal (POM) is a core material for repeatable precision parts thanks to stiffness, machinability, and dimensional stability. We also support machining/supply in other plastics where duty requires it, for example:
Nylon (PA), UHMWPE, PET, PTFE
PEEK (where higher temperature/chemical resistance is needed)
Other polymers by request (subject to availability and application duty)
If you’re unsure which polymer is appropriate, we’ll help you select based on load, wear mechanism, temperature, lubrication, chemical exposure, and tolerance/creep risk.
Machining and secondary operations
Depending on the part and duty, typical operations include:
CNC turning and milling (single parts through to batch runs)
Deburr/edge-break and controlled cosmetic finish
Threading, reaming, counterbores/countersinks
Simple jigs/fixtures where needed to protect critical datums and repeatability
Assembly and integration (when required)
Where your supply needs to arrive “ready to use”, we can coordinate assembly steps such as:
Pressing in bearings and bushes
Light mechanical assembly of sub-systems
Fit checks against mating parts / defined interfaces (when you provide reference parts or interface dimensions)
Inspection, tolerance control, and documentation
Batch supply only works if tolerances, inspection method, and revision control are explicit. Our aim is to make your parts easy to accept and easy to re-order.
Typical controls include:
Clear drawing/specification pack (datums, tolerances, critical features highlighted)
First-off / sample verification approach where appropriate
Defined inspection method for critical dimensions (so repeat batches stay consistent)
Practical sign-off documentation suitable for stakeholders (engineering, procurement, quality)
How we work (prototype → production)
Define the requirement
Function, environment, volumes, interfaces, and what “good” looks like.Confirm material + manufacturing route
Choose polymer and machining strategy appropriate to duty and tolerance.DFM input (if needed)
Adjust details that affect cost and repeatability (datums, fits, tool access, assembly order).Prototype / first batch
Supply initial parts with the right checks so you can validate.Batch supply and repeat orders
Controlled revisions, consistent inspection approach, and practical lead-time planning.
What we need from you (to quote accurately)
A drawing, sketch, STEP file, or clear dimensional brief
Target quantity per batch and expected repeat frequency
Duty/environment (temperature, chemicals, wear mechanism, lubrication)
Any critical fits (bearing seats, shafts, sliding interfaces)
Cosmetic expectations (where surface finish/appearance matters)
Delivery requirements (labelling, packaging, documentation needs)
Adrian Lowes BEng(hons) CEng MIMechE ASME
Adrian Lowes is a Chartered Mechanical Engineer and the founder of Barair Systems Limited, with over two decades of experience delivering innovative engineering solutions.
A graduate of the University of Bradford, he has worked on projects from automated vision systems for the automotive industry to oil and gas research with Cranfield University. He has developed products for brands including Microsoft, ICI, Toyota, and Florette. His expertise spans machinery design, finite element analysis, CE marking, and industrial accident investigation.
A lifelong musician, Adrian has directed Skipton Brass and Brass Ten, and served on the Alumni Committee of the National Youth Brass Band of Great Britain. Based in West Yorkshire, he combines technical precision with creative problem-solving in every project.
Do you only supply acetal (POM)?
No — acetal is common, but we support other engineering plastics where duty requires it.
Can you help if we’re still developing the design?
Yes. Many customers start with prototypes/small batches and iterate. We can provide practical DFM input so the design is easier to machine and assemble repeatably.
Can you supply assembled parts (bearings/bushes installed)?
Yes — we can coordinate assembly steps so components arrive ready to fit.
What batch sizes do you support?
Typically one-offs/prototypes through to small and medium batch runs, depending on part geometry and material.
Do you provide inspection evidence?
Where required, yes — we can align to a sensible first-off / critical-dimension approach or your specified QC requirements.
Can you also supply metal parts alongside plastics?
If a project needs mixed materials, we can often coordinate supply via appropriate manufacturing routes so you receive a coherent, controlled deliverable.