Product Specifications
- Material: 90–95 wt% tungsten alloy (W-Ni-Fe or W-Ni-Cu)
- Density: Up to 18.5 g/cm³
- Hardness: HRA 90–95
- Dimensional Tolerance: ±0.02 mm achievable through MIM
- Surface Condition: As-sintered, polished or precision CNC-finished
- Form Factors: Rings, cylinders, eccentric blocks, custom micro-shapes
- Customization: Density tuning, magnetic characteristics and form factors tailored to application needs
Overview
NEWLIFE's Tungsten Alloy Balancing Weights are engineered for vibration systems that demand exceptional mass concentration, dimensional accuracy and long-term mechanical reliability. Manufactured using advanced MIM (Metal Injection Molding) and PM (Powder Metallurgy) processes, these components serve as the eccentric mass in compact motors used across smartphones, electric toothbrushes, wearable devices and other precision mechanisms.
Our in-house tungsten powder development ensures stable particle size distribution, controlled purity and predictable sintering behavior-resulting in consistent high density and repeatable shrinkage performance. This enables the production of miniature weights with extremely tight tolerances, high structural integrity and outstanding balance characteristics.
Key Advantages
High Density & Vibration Stability
With densities up to 18.5 g/cm³, tungsten alloy offers a significantly higher mass-to-volume ratio than stainless steel or brass, enabling stronger and more stable vibration output in smaller component footprints.
Manufacturing Advantages of MIM/PM
- Complex Geometry Forming: MIM enables intricate shapes-including undercuts, fine edges, and thin-wall structures-that are difficult or extremely costly with CNC machining.
- Uniform Microstructure: Powder metallurgy produces fine-grained, stable material that resists fatigue and impact better than cast materials.
- High Repeatability: Controlled sintering eliminates dimensional drift, achieving batch-to-batch consistency ideal for consumer electronics.
- Cost Efficiency: Minimal material waste compared with CNC (especially with expensive tungsten alloys), making mass production economically attractive.
Durability for High-Frequency Motors
The alloy's inherent hardness (HRA 90–95) and wear resistance ensure long-term stability under continuous vibration, rotational acceleration and temperature variations found in micro-motors.
Applications
- Smartphones: Haptic feedback motors requiring stable amplitude output
- Electric Toothbrushes: High-frequency oscillation systems
- Automotive Electronics: Micro-actuators, vibration control modules
- Medical & Laboratory Devices: Precision balancing for micro-pumps and micro-drives
- Wearable Devices: Ultra-compact vibration and counterweight mechanisms
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