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Cemented Carbide Precision Bushing Sleeves

In high-precision machining and tooling applications, component rigidity and dimensional stability are non-negotiable. Our DIN179A Precision Drill Bushings set the industry benchmark for guiding cutting tools with exceptional accuracy, minimizing deflection and ensuring consistent hole quality. When even greater wear resistance is required, especially in high-volume production runs, our Hardened Steel Plain Drill Bush provides a robust and durable solution. For the most demanding environments where extreme hardness, superior wear resistance, and excellent corrosion resistance are critical, our Cemented Carbide Precision Bushing Sleeves offer an unparalleled performance upgrade. Machined from premium-grade tungsten carbide, these sleeves are engineered to withstand severe abrasive wear, high-pressure coolants, and corrosive atmospheres, drastically extending service life and reducing machine downtime for costly replacements.


Our Cemented Carbide Precision Bushing Sleeves are not merely replacements for steel components; they represent a strategic investment in manufacturing efficiency and part quality. The exceptional material properties of cemented carbide allow for tighter internal tolerances and superior surface finishes on the ID, which directly translates to improved guidance for drills, reamers, and other cutting tools. This results in straighter, more precise holes with enhanced surface integrity. The sleeves are designed for press-fit installation into jigs, fixtures, or machine housings, providing a permanent, rock-solid guide point. They are ideal for applications in aerospace, automotive, medical device manufacturing, and any precision engineering sector where tool longevity and consistent output are paramount. Each sleeve undergoes rigorous inspection to guarantee concentricity, roundness, and dimensional accuracy, ensuring reliable performance from the first operation to the last.

Key Specifications & Technical Data

  • Base Material: Premium Tungsten Carbide (WC-Co)
  • Hardness: 88.5 - 92.5 HRA (Approx. 1400 - 1800 HV)
  • Density: 14.0 - 15.0 g/cm³
  • Transverse Rupture Strength: 2800 - 3500 N/mm²
  • Compressive Strength: > 5000 N/mm²
  • Co-efficient of Thermal Expansion: 5.5 - 6.0 µm/m·K
  • Surface Finish (ID): Ra ≤ 0.2 µm (Custom finishes available)
  • Operating Temperature Range: Up to 800°C (1472°F) in inert atmosphere
  • Corrosion Resistance: Excellent resistance to acids, alkalis, and oxidation.

Standard Dimensional Tolerances (Example Range)

Inside Diameter (ID) Range Standard ID Tolerance (H6) Outside Diameter (OD) Tolerance Concentricity (T.I.R.)
1.0 mm - 3.0 mm +0.006 / +0.000 mm k6 ≤ 0.003 mm
3.0 mm - 6.0 mm +0.008 / +0.000 mm k6 ≤ 0.004 mm
6.0 mm - 10.0 mm +0.009 / +0.000 mm m6 ≤ 0.005 mm
10.0 mm - 18.0 mm +0.011 / +0.000 mm m6 ≤ 0.006 mm
18.0 mm - 30.0 mm +0.013 / +0.000 mm n6 ≤ 0.008 mm

Available Configurations & Finishes

  • Standard: Unground OD, Precision Ground ID.
  • Precision Ground: Fully ground ID and OD for highest accuracy.
  • Flanged / Shouldered: For positive axial location.
  • Special Coatings: TiN, TiCN, or DLC coatings available for specific applications.
  • Custom Geometry: Manufactured to customer-specific drawings and specifications.

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