How Die Casting Reduced Servo Component Costs by 45% Efficiently

How Die Casting Reduced Servo Component Costs by 45% Efficiently

The Challenge

A highly specialized precision component used in a fluid fitting for a servo sensor was provided to AmTech for a manufacturability study.

An EV  sales team submitted the RFQ to our design engineers. To understand the pain points, our design team engaged directly with our engineering team — and what we discovered was eye-opening.

The original manufacturing process was as follows:

  • Start with a solid 6061-T6 aluminum round bar
  • CNC turning to machine shaft, steps, and grooves
  • Secondary milling
  • Deburring
  • Ultrasonic cleaning

This approach, while effective in terms of quality, created three major challenges:

  1. High manufacturing costs
  2. Long lead times
  3. Significant material waste

Because this component became a bottleneck in the company’s rapidly scaling production, they needed a more scalable, cost-effective solution.


Our Discovery

The original process involved:

  • Multi-axis CNC machining from solid rod stock
  • Extensive material waste due to deep cuts and tight tolerances
  • Long cycle times that didn’t scale with growing demand

The AmTech Breakthrough

We consulted with our manufacturing engineers in India to explore a better solution. The turning point came when we proposed creating a lost wax mold with sliding inserts intersecting at 90 degrees  for quick sample production— and everything changed.

We quickly developed the mold, produced 50 sample parts, and validated that the component could be manufactured using precision high-pressure die casting.


The AmTech Solution: High-Pressure Die Casting

After reviewing the geometry, load conditions, and material requirements, our team proposed a new approach:

Precision high-pressure aluminum die casting with minimal finish machining.

Key Improvements:

  • 90% of the part formed by mold — only tight bores required post-machining
  • Near-zero material waste
  • Massively scalable production
  • Shorter cycle times

The Result: 45% Cost Savings 

By shifting to die casting, we helped the company achieve:

  • 45% reduction in manufacturing cost
  • Dramatic reduction in production time
  • Improved consistency and reduced handling steps
  • Preservation of all critical tolerances and mechanical integrity

This was not just a cost-cutting initiative — it was a manufacturing breakthrough that scaled seamlessly with company’s growth.


Engineering Details That Made It Work

To make the die-cast solution successful, we:

  • Designed custom die tooling optimized for the component geometry
  • Engineered precise fill rates and cooling paths to prevent porosity or distortion
  • Incorporated draft angles and fillets for castability while maintaining critical interfaces
  • Post-cast machining was limited only to sealing and interface surfaces

All performance and compliance standards were fully met, including:

  • Leak testing per ASTM A1047: 29 PSI for 5 minutes, <4 cc/min decay
  • Environmental compliance: RoHS, REACH, GADSL
  • Ultrasonic degreasing for internal system cleanliness

Final Thoughts: Innovation in the Details

At AmTech International, we believe the biggest wins often come from rethinking the smallest components. By transforming the end fitting from fully-machined to precision-cast, we delivered:

  • 45% cost savings
  • Zero compromise on quality
  • Scalability that increased the company’s  growth

This is what we mean by “Innovative Solutions in Motion.”


Customer Reaction & Outcome

We presented the samples to client — and they were blown away. The parts passed assembly and functional testing, and Amtech was ultimately awarded the full production contract.

Need a reliable manufacturing partner? Contact us today to discuss your project
requirements and discover how AmTech can support your success.

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