Precision in Motion: Designing a Quick-Swap Anti-Roll Bar Bracket for UK Rallying

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An independent amateur rally driver in the UK needed a robust and rapidly interchangeable solution to adapt their rear suspension setup between varied race conditions, often requiring a change of their anti-roll bar diameter mid-event.

The client’s initial concept lacked the necessary manufacturing detail and risked being overly heavy and slow to adjust. The core problem was balancing high-performance design with manufacturing efficiency.

  • Critical Need: The bracket must allow for an anti-roll bar swap in minimal service time (seconds, not minutes).

  • Performance Requirement: The component needed intelligent features to reduce mass without compromising the structural integrity essential for harsh rally stages.

  • Target Material & Process: CNC machined from 6061 Aluminium, with complex features on the main body requiring a 4-axis machining centre.

The DFM ( Design for Manufacture) Solution: Intelligent Feature Design and 4-Axis Optimisation


The DFM ( Design for Manufacture) Solution: Intelligent Feature Design and 4-Axis Optimisation


Axis and Datums Design, a specialist CAD Design Freelancer, was engaged to apply advanced Design for Manufacture (DFM) principles. We transformed the basic concept into a fully detailed, production-ready assembly, balancing complex performance features with an achievable, cost-effective machining strategy using Onshape.

Our Process Focused on Manufacturability:

  • Mass Reduction via Pockets: The shallow, recessed pockets on the main body were strategically incorporated. While necessitating a 4-axis CNC setup, we ensured the pocket geometry was simple for toolpaths, justifying the use of the 4th axis for a net benefit in weight reduction and material cost saving.

  • Split Component Strategy: The assembly was engineered as two components (Main Body: 4-Axis; Top Clamp: 3-Axis). This division simplified fixturing, allowed for separate, optimised machining schedules, and sped up the overall production lead time.

  • Datum Structure & Precision Drafting: A precise datum structure was defined, focusing on the interface surfaces. A comprehensive Geometric Dimensioning and Tolerancing (GD&T) scheme was applied to the 2D manufacturing drawing . This technical rigour guaranteed the precise alignment of the anti-roll bar and ensured any future replacement top clamp would fit flawlessly (true interchangeability).

  • Quick-Swap Access Refinement: We refined the ergonomic cut-out on the top bracket to maximise tool access and clearance, ensuring the team could perform the diameter change in seconds, even during a high-pressure pit stop.

The Production-Ready Outcome: Speed, Strength, and Competitive Edge


Axis and Datums Design, a specialist CAD Design Freelancer, was engaged to apply advanced Design for Manufacture (DFM) principles. We transformed the basic concept into a fully detailed, production-ready assembly, balancing complex performance features with an achievable, cost-effective machining strategy using Onshape.



The engineered design achieved the critical balance required for motorsport: high performance enabled by a technically rigorous manufacturing package.

Tangible Benefits for the Client:

  1. Reduced Service Time: The quick-swap design saves critical minutes during service intervals, providing a competitive advantage on the stage.

  2. Optimised Manufacturing Flow: By detailing the part for both 3-axis and 4-axis operations, the client was able to secure the most cost-effective and reliable quotes from local UK engineering shops.

  3. High-Performance Weight Reduction: The intelligent pocketing achieved the performance weight reduction target while maintaining the necessary strength.

  4. Flawless Production Package: The client received a complete release package (STEP files and a certified PDF manufacturing drawing with GD&T), guaranteeing the parts will be first-time-right and ready for the demands of the rally calendar.

I don't just model parts; I engineer the most efficient and precise path from design intent to the finished, race-ready component.

Axis and Datums Design, a specialist CAD Design Freelancer, was engaged to apply advanced Design for Manufacture (DFM) principles. We transformed the basic concept into a fully detailed, production-ready assembly, balancing complex performance features with an achievable, cost-effective machining strategy using Onshape.


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Location: United Kingdom

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