In the world of high-precision machining, thermal displacement of the spindle has long been a hurdle for yield and efficiency. Hartford, a leader in machine tools, has addressed this by integrating the innovative "Shaft-Cooling Built-in Spindle Technology" developed in collaboration with PMC. Real-world testing confirms that this technology slashes warm-up time from 37 minutes to just 3 minutes—a staggering 90% improvement—positioning Taiwan as a powerful contender in the global high-end supply chain.
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04.30
2026
Hartford Integrates Taiwan's Precision Cooling Tech
Smart Machinery: A Revolution from the Core—Leading EV, Aerospace, and Precision Tooling to the Global Stage
Industry Challenge: The Critical Impact of Thermal Deformation on Precision Machining
In the production of precision molds, EV components, and aerospace structural parts, stability is paramount. Under prolonged, high-speed operation, the stator and bearings of a traditional spindle motor generate significant heat.
Bottlenecks of Conventional Cooling Systems:
1.Uneven Cooling:
Traditional external circulation fails to reach the spindle core, leading to excessive internal temperature gradients.
2.Dimensional Instability:
Heat accumulation causes "thermal expansion," making dimensional variance unpredictable and compromising the fitting precision of high-end molds.
3.Production Inefficiency:
To achieve thermal equilibrium, operators must often perform 30 to 40 minutes of pre-heating, resulting in substantial waste of energy and time.
Core Technology: Hartford’s “Spindle Core Cooling” Breakthrough
Hartford’s technological breakthrough lies in redefining conventional cooling concepts—moving beyond traditional “external cooling” to achieve direct temperature control from the core of the spindle. This innovation represents not only a hardware upgrade,
1. World-Class Thermal Source Simulation
Through high-resolution thermal source simulation, Hartford’s R&D team can accurately analyze heat generation and distribution within the motor under various spindle speeds.
This enables the design of optimized cooling paths, ensuring that every drop of coolant delivers maximum heat transfer efficiency.
2. Core Cooling Channels Direct to Heat Sources
The cooling channels are engineered to pass directly through the spindle core, guiding coolant precisely to the most critical heat-generating areas—such as the motor rotor and bearings.
This configuration minimizes internal and external temperature differentials during operation, fundamentally suppressing thermal deformation at its source.
Proven Performance: Validation Results from Hartford and PMC
According to the final verification of the 2024 government-funded technology program, Hartford (She Hong Industrial Co., Ltd.), as a leading manufacturer, conducted full machine validation. The results have drawn significant attention across the industry.
1. How much can warm-up time be reduced?
Traditional CNC spindles typically require 37–40 minutes of warm-up before reaching stable machining conditions.
With spindle core cooling, the warm-up time is reduced to approximately 3 minutes.
2. Can thermal deformation be effectively controlled?
Yes. In conventional spindles, thermal growth during long operation is difficult to predict and often affects machining accuracy.
With core cooling technology, thermal deformation can be controlled within ≤ 5 μm, ensuring consistent precision.
3. Is high-speed machining stable?
Traditional machines tend to become unstable at high spindle speeds due to heat buildup, which negatively impacts machining quality.
In contrast, the spindle core cooling system achieves rapid thermal stability even at approximately 75% of maximum spindle speed.
In summary, this technology addresses three major pain points in conventional CNC machining:
❌ Long warm-up time
❌ Poor thermal deformation control
❌ Instability at high speeds
And delivers three direct benefits:
✅ Near “instant-on” machining capability (up to 90% efficiency improvement)
✅ Stable micron-level accuracy (≤ 5 μm)
✅ Reliable performance even under high-speed machining conditions
Industrial Applications: Empowering the Advanced Manufacturing Supply Chain
The successful implementation of this technology by Hartford has provided strong support for Taiwan’s precision machinery sector to enter the global high-end supply chain. The derived services and related output value have reached NT$96 million. Key application areas include:
1.Electric Vehicle (EV) Key Components
Provides a stable and efficient machining environment for EV motor housings and precision structural parts.
2.Aerospace Industry
Aerospace structural components demand extremely high material performance and precision. The spindle core cooling technology ensures dimensional accuracy and yield stability during long-duration machining of large parts.
3.Precision Molds
For 3C electronic precision molds, this technology effectively eliminates accuracy deviations caused by thermal cycling.
Conclusion: Defining the Next Generation of Precision Machining
The spindle core cooling built-in spindle showcased by Hartford at TMTS 2026 not only received strong recognition from the Department of Industrial Technology, Ministry of Economic Affairs, but also demonstrated outstanding performance in real-world operation.
For customers, this is more than just saving 34 minutes of warm-up time—it significantly improves production yield, reduces energy consumption, and establishes a strong “precision moat” in the global competitive landscape.
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