Round Spacers

Round spacers are precision-engineered cylindrical components used to maintain consistent spacing between components in mechanical assemblies, electronic systems, and industrial equipment. Designed with a central bore, they allow bolts or screws to pass through while preserving structural alignment, insulation, or load-bearing separation.

With tight dimensional control, surface smoothness, and Material versatility, round spacers play a critical role in enhancing durability, Electrical performance, and assembly integrity across various industries including electronics, Automotive, aerospace, and industrial machinery.

Product Features & Benefits

• Precision Tolerance:
  Standard tolerance of ±0.127 mm, high-precision models up to ±0.0254 mm (0.001”)

• Broad Size Range:
  Outer diameter: 3 mm – 50 mm
  Length: 1 mm – 100 mm
  Wall thickness: 0.5 mm – 10 mm

• High Load Capacity:
  Steel spacers support up to 1,500 N/mm² compressive force

• Thermal and Electrical Stability:
  From -200°C to 800°C for stainless steel; nylon offers high dielectric insulation

• Vibration and Shock Resistance:
  Withstands frequencies >500 Hz and impact loads >50G in aerospace use

• Excellent Surface Finish:
  Surface roughness as low as Ra ≤ 0.8 μm, ensuring smooth mating

Manufacturing & Machining Process

Our round spacers are manufactured using automated CNC turning, precision boring, and centerless grinding processes. The entire production is controlled under ISO 9001:2015 and applicable MIL-specs for aerospace-grade applications.

Additional processes include:

• Drilling and reaming for tight-tolerance bores

• Deburring and polishing to eliminate edge burrs

• Automated inline dimensional inspection for production consistency

Material Options

Custom materials such as titanium or composites are available for aerospace and high-performance applications.

Surface Treatment Options

• Anodized Aluminum: 10–25 μm oxide layer for corrosion and abrasion resistance

• Passivation for Stainless Steel: Improves corrosion resistance and appearance

• Nickel or Zinc Plating: Enhanced wear resistance and aesthetic surface

• Dry Film Lubricants: For high-load friction management

• ESD Coatings or Insulative Paints: For electronic and cleanroom applications

Precision & Quality Control

We implement a strict quality system to ensure dimensional, structural, and visual consistency:

• Dimensional Control:
  Micrometer inspection up to 0.0001" resolution

• Thread & Bore Verification:
  GO/NO-GO gauges, concentricity measurement

• Surface Roughness:
  Profile measurement to Ra ≤ 0.8 μm

• Optical Inspection:
  50× magnification to detect surface cracks or wear

• Torque & Load Testing:
  Ensures fastener compatibility and load durability

Application Fields

Electronics

• PCB standoff spacers to prevent short circuits (3–20 mm height range)

• Heat sink spacing for thermal dissipation (Aluminum, thermal conductivity up to 200 W/m·K)

• RF shielding applications requiring λ/4 resonance spacing

Automotive

• Sensor and module mounting with vibration damping

• Battery pack spacing for EVs (2–5 mm clearance)

• Thermal-resistant components near brake or engine systems (up to 300°C)

Aerospace

• Avionics brackets with MIL-STD shock and vibration compliance

• Spacing in composite panels with matching thermal expansion

• Low outgassing variants for satellite systems

Industrial Machinery

• Bearing preload spacing with 0.001” tolerance

• Conveyor and guide rail components

• Spacers for high-pressure hydraulic systems (rated up to 10,000 psi)

FAQ – Frequently Asked Questions

Q1: What is the difference between a spacer and a standoff?
A: A spacer usually has no thread, used purely for spacing. A standoff typically includes threads (male/female) to secure components.

Q2: Can I request custom lengths, diameters, or tolerances?
A: Yes, we offer full OEM machining support based on your drawings or CAD files.

Q3: Are your nylon spacers ESD-safe and RoHS compliant?
A: Yes, all plastic materials used are RoHS/REACH compliant, and ESD-safe versions are available on request.

Q4: How are the spacers cleaned and packaged?
A: Cleaned via ultrasonic systems, dried using compressed air, and packaged in anti-static or VCI packaging depending on material.

Q5: How do I determine when to replace spacers?
A: Replace if deformation >0.5% of size, visible corrosion on >10% of surface, or thread engagement damage exceeds 30%.