Aluminum Spacer

Aluminum spacers are precision-engineered cylindrical or ring-shaped components designed to maintain fixed distances between two surfaces in structural and mechanical assemblies. Made from high-grade aluminum alloys such as 6061-T6, they offer an exceptional combination of light weight, thermal conductivity, mechanical strength, and corrosion resistance.

Aluminum spacers are widely used across industries where structural integrity, heat dissipation, and weight reduction are critical—such as aerospace, electronics, automotive, Medical devices, and renewable energy systems.

Product Features & Advantages

• Lightweight and High Strength
  At a density of only 2.7 g/cm³, aluminum spacers are up to 66% lighter than steel alternatives, while still offering tensile strengths up to 310 MPa (6061-T6 alloy).

• Excellent Thermal Conductivity
  With values between 120–180 W/m·K, aluminum spacers dissipate heat efficiently in high-temperature environments.

• Superior Corrosion Resistance
  Natural oxide layers and anodized coatings provide long-term protection. In salt spray testing (ASTM B117), properly treated spacers withstand 500+ hours without significant corrosion.

• Dimensional Precision & Stability
  Machined to tolerances as tight as ±0.013 mm, aluminum spacers also offer thermal expansion consistency (CTE: 23.1×10⁻⁶/°C) for precision-critical applications.

• Electrically Conductive (Optional)
  Conductivity levels of 30–40% IACS, making aluminum spacers suitable for electrical and grounding applications where insulation is not required.

• Non-magnetic & Non-toxic
  Ideal for sensitive electronics and Medical use; fully compliant with ISO 10993 for biocompatibility.

Manufacturing & Machining Process

Aluminum spacers are manufactured using high-precision CNC turning, centerless grinding, and bore reaming. Our production capabilities support custom geometries, large batch quantities, and tight tolerances:

• CNC Lathe Turning – ensures roundness, concentricity, and accurate wall thickness

• Drilling/Reaming – for center holes and bore tolerance control

• Threading (Optional) – both internal and external threading available (e.g., M2–M12)

• Anodizing Line & Quality Lab – for protective coating and surface inspection

All production follows ISO 9001:2015 standards with SPC (Statistical Process Control) monitoring throughout.

Material Selection

Custom alloys (e.g., 6082, 2011) are also available based on application needs.

Surface Finishing Options

• Anodizing (Clear/Color)
  Forms a 5–25μm protective oxide layer; improves corrosion resistance and appearance

• Passivation
  Used primarily for post-machining oxide stabilization

• Dry Film Lubricant Coating
  Reduces friction and wear in high-load assemblies

• Powder Coating / Painting
  For aesthetic or insulation purposes

• Polishing / Sandblasting
  Improves surface finish (Ra ≤ 0.8μm) and cosmetic appeal

Precision & Quality Control

Each aluminum spacer undergoes a rigorous quality assurance process:

• Dimensional Tolerances: Machined to ±0.013 mm or tighter upon request

• Roundness & Concentricity: Controlled through centerless grinding

• Microscopic Surface Inspection: 50× magnification to identify defects, scratches, and surface flaws

• Torque Testing: Where spacers are used with fasteners, torque values are verified within ±10%

• Eddy Current Testing: Detects internal defects or galvanic corrosion (50–500 kHz range)

Inspection reports and material certificates (including RoHS, REACH, SGS) are available upon request.

Application Areas

Aerospace & Aviation

• Weight-critical applications (e.g., avionics, structural frames)

• Withstand thermal cycles and vibration loads per MIL-STD-810

• High specific strength up to 150 kN·m/kg

Electronics & PCB Mounting

• Maintain clearance between boards and enclosures (heights from 3–50mm)

• Non-magnetic, non-interfering with EMI-sensitive components

• Ideal for heat sink spacing

Automotive & EV Systems

• Battery modules, engine brackets, and sensor mounts

• Resist operating temperatures up to 200°C

• Support lightweight design in electric vehicles

Industrial Machinery

• Spacer and shim components in gearboxes and heavy equipment

• Load-bearing capacity up to 5000 N

• Used in conveyor systems and press-fit tooling

Renewable Energy Systems

• Structural spacers in solar panel mounting and wind turbine hubs

• Designed for outdoor durability and UV exposure

• Support galvanic isolation to prevent corrosion

Medical Devices

• Used in MRI machines, imaging tools, and surgical systems

• Fully sterilizable and biocompatible under ISO 10993

• Anodized or polished finish for medical-grade aesthetics

FAQ – Frequently Asked Questions

Q1: What sizes are available for aluminum spacers?
A: We offer OD 3–50 mm, lengths from 1–100 mm, and wall thicknesses of 0.5–10 mm. Custom sizes are supported.

Q2: Do you offer threaded aluminum spacers?
A: Yes. Both male-female and female-female threading in metric and inch series are available.

Q3: Are aluminum spacers RoHS/REACH compliant?
A: Absolutely. All alloys and surface treatments meet RoHS, REACH, and environmental safety standards.

Q4: How should aluminum spacers be cleaned and stored?
A: Use mild pH 9–11 alkaline cleaners. Rinse with DI water and store in VCI packaging at 15–25°C with <60% RH.

Q5: When should spacers be replaced?
A: Replace if corrosion exceeds 10% of surface, deformation exceeds 0.5%, or after 10,000 thermal cycles in high-heat applications.