info@gunther.co.uk
Precision-Machined Special Parts.
Special Machining
In addition to mould bases, OptiMach provides a full range of fully machined special parts, manufactured directly to your 3D models and technical specifications. From simple round components to complex tooling components, we deliver high-precision parts that integrate seamlessly into your mould or die assembly.
Our machining capability ensures tight tolerances, exceptional surface quality, and complete consistency across every component. With rapid turnaround times, competitive pricing, and reliable local support, we help toolmakers reduce lead times and keep projects moving smoothly.


Components We Supply
- Cores & Core Pins – High-accuracy and with polished, coated and heat-treated options available
- Die Blocks – Machined from a wide range of tool steels with precision cooling and detail features
- Slides & Wear Components – Manufactured to exact geometry for smooth, reliable tooling performance
- Round Parts – Guide elements, ejector components, plates, bushings, and custom cylindrical parts
- Custom Machined Tooling Features – Any non-standard component produced directly to customer 3D data

Why Choose OptiMach Special Parts?
Engineered to Your Models
- Produced from customer 3D CAD, drawings, and colour-coded models
- Full verification prior to machining for total confidence in the final part
High Precision & Tight Tolerances
- Advanced CNC machining ensures accuracy and repeatability
- Full CMM reports as standard
Speed, Quality & Value
- Fast lead times powered by our large-scale CNC and other machining capacities
- Consistent quality backed by controlled manufacturing processes
- Competitive pricing without compromising performance
Local Support You Can Rely On
- Dedicated engineering and customer support teams
- Clear communication throughout the manufacturing process
What our clients say
We’ve used Gunther Hot Runner Systems, OptiMach special machining, and Knarr collapsible cores via Gunther UK for a number of years. The quality is always exceptional and the service is responsive and reliable.
New Tooling Manager
Major UK OEM
Gunther’s demonstrated technical knowledge allow us to confidently provide working, robust moulds that produce consistent parts. Delivering a quality product and incredible support are more important today than ever before, Gunther never fails to deliver this, which in turn helps us to provide the same service to our customers. I can’t recommend them enough.
UK Toolmaker/moulder
We’ve been working with Gunther UK since 1988, and they’ve never let us down. The combination of personal service, trustworthy advice, and consistently high-quality hot runner systems and mould components has cemented our relationship over three decades. They feel less like a supplier and more like a partner we can rely on.
Gary Statham
Neptune Injection
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