Custom Heavy Tungsten Alloy Counterweight

Product Description

Product Overview

Heavy Tungsten Alloy Counterweights are high-density metal components primarily used to balance, stabilize, and optimize the performance of mechanical systems. With a density ranging from 16.5 to 19.3 g/cm³, they are significantly denser than steel and lead. This exceptional weight-to-volume ratio allows engineers to achieve precise mass distribution in highly confined spaces, making them the ultimate solution for weight-critical applications across various industries.

Material Benefits

Ultra-high density

The density of W-Ni-Fe tungsten alloy is 16.5–18.5 g/cm³. This is 2.3 times that of steel, 2 times that of copper, and 1.5 times that of lead. This high density allows for the achievement of large weights in small spaces, making it suitable for applications where installation space is limited.
High melting point, low thermal expansion coefficient
The melting point exceeds 3000°C, and the thermal expansion coefficient is low. As a result, the size and mass distribution of the weight remain stable under temperature changes. It does not deform easily under high-temperature conditions, ensuring high dynamic balance accuracy.

Excellent vibration damping

It can absorb vibrations, suppress resonance, reduce equipment shaking, and improve the stability of rotating components such as flywheels, shafts, and pendulums.

High strength and hardness

The tensile strength of W-Ni-Fe alloy can reach 700–1000 MPa. It also has good impact toughness, preventing it from breaking easily. Compared with lead weights, lead is soft and prone to deformation; tungsten alloy can withstand impacts and vibrations, resulting in a longer service life. W-Ni-Cu alloy is non-magnetic, but its strength is slightly lower. It is suitable for applications where a non-magnetic weight is required.

Good machinability

It can be processed using turning, milling, drilling, grinding, and EDM cutting techniques. It can be formed into discs, blocks, irregular shapes, or thin sheets. It also supports drilling and threading, making assembly and fixation easier.

Corrosion resistance and oxidation resistance

It resists atmospheric corrosion and most weak acids and alkalis. It does not corrode easily, and no complex anti-corrosion coatings are needed. It maintains its quality over long periods of use in outdoor or humid environments, and the weight of the weight does not decrease due to corrosion.

Technical Specifications & Grades

Applications

1. Aerospace
Heavy tungsten alloy counterweights are widely used in helicopter rotors, aircraft control surfaces, and inertial navigation systems. Their high density allows for precise weight distribution in limited spaces, effectively reducing the center of gravity and minimizing vibrations, thereby improving flight stability.
2. Automobiles and Motorsport
Tungsten alloy counterweights are employed in the chassis, suspension systems, and balance weights of car engines. They significantly reduce the vehicle’s center of gravity, counteracting the forces caused by high speeds, and enhance traction and handling during turns.
3. Medical Devices and Radiation Protection
Tungsten weights serve as environmentally friendly alternatives to lead and are commonly used in CT collimators and radiation shielding structures. The radiation shielding capacity of tungsten is 30% to 40% higher than that of lead when comparing similar volumes.
4. Precision Instruments and Industrial Machinery
High-density tungsten blocks are used in industrial robot arms, machine tool shock-absorbing boring bars, and analytical balance weights. Their very low thermal expansion coefficient ensures accurate operation and effective shock absorption under complex operating conditions.
 

Tungsten Weight Pictures

Custom Capabilities & Quality Control

• As a reliable custom tungsten weight manufacturer, we supply not only standard tungsten alloy blanks and finished parts, but also professional OEM & ODM custom development according to your PDF, CAD, or STEP drawings. Full‑cycle manufacturing is available from powder metallurgy sintering to precision finishing.
• Our workshop is equipped with powder metallurgy sintering lines, CNC turning‑milling centers, precision grinding machines,s and EDM equipment to produce complex‑shaped tungsten counterweights, balance blocks, and radiation shielding components. Tight machining tolerances can be achieved: general tolerance ±0.02 mm, critical features down to ±0.005 mm, meeting strict assembly requirements for aerospace, construction machinery and medical devices.
• Full‑process quality control covers incoming material inspection, sintering monitoring, 100‑percent dimensional check,eck and UT ultrasonic non‑destructive testing. Certified to ISO 9001:2015, we support AS9100‑grade aerospace projects. EN 10204 3.1 Material Test Certificates (MTC) and full‑batch inspection reports are available to guarantee consistent batch‑to‑batch performance and stable deliveries for your projects.

FAQ

1. Why choose tungsten alloy over lead for counterweights?
Answer:wer: Tungsten heavy alloy delivers much higher density than lead, so you can achieve the same mass with significantly smaller component volume. It is non-toxic and RoHS compliant, avoiding environmental & regulatory restrictions associated with lead. Tungsten alloy features higher tensile strength, excellent impact resistance, and corrosion resistance; it will not deform or dent under vibration and shock like soft lead. While lead is low cost, tungsten alloy provides longterm dimensional stability for precision balancing applications.
 
2. What is the maximum density of your tungsten ballast weights?
Answer: Our WNiFe tungsten heavy alloy counterweights can reach a maximum density of 18.8 g/cm³, corresponding to 97-98% tungsten grade. Common production grades are 90W,93W, 95W, with density ranging from 16.8 g/cm³ to 18.3 g/cm³. Actual density data is shown on the EN 10204 3.1 material test certificate for each batch.
 
3. Do you support small batch prototyping?
Answer: Yes, small batch prototyping service is available. We can produce prototype parts based on your CAD / STEP / PDF drawings before mass production. Lead time for prototypes depends on part complexity and machining requirements. After prototype validation, we can smoothly transfer to serial OEM production.
 
4. What machining tolerances can you achieve for custom tungsten counterweights?
Answer: General dimensional tolerance reaches ±0.02 mm for most tungsten alloy counterweight parts. For critical mating features, tight tolerance down to ±0.005 mm is achievable via precision grinding and EDM. Tolerance feasibility needs to be reviewed together with your drawing.
 
5. Can you provide MTC and inspection reports for tungsten weight orders?
Answer: Absolutely. We supply EN 10204 3.1 Material Test Certificates (MTC), together with dimension inspection records and UT ultrasonic test reports upon request. Our production is certified under ISO 9001:2015; full batch documentation supports your incoming quality control.