Precision WC-Ni Alloy Tungsten Carbide Sleeve with ±0.001mm OD Tolerance and 89-92 HRA Hardness for Magnetic-Sensitive Applications
Precision-Machined Non-Magnetic Alloy Positioning & Bearing Components for Magnetic-Sensitive Machinery
WC-Ni alloy with µ < 1.002 permeability, 89-92 HRA hardness, and ±0.001mm OD tolerance for semiconductor, medical, and aerospace applications. Custom diameters up to 300mm.
Our Precision-Machined Non-Magnetic Alloy Outer Diameter (OD) Rings are engineered specifically to overcome these challenges. Manufactured from advanced WC-Ni (Tungsten Carbide-Nickel) alloy and other specialized non-ferrous materials, these precision annular components deliver the essential combination of absolute magnetic neutrality, micron-level OD tolerance, and outstanding dimensional stability for the most demanding metalworking and precision assembly applications.
Recent breakthroughs in WC-Ni sintered ring technology have achieved magnetic permeability consistently below 1.002, providing:
- Zero magnetic signature – no disruption to sensitive electronic or magnetic systems
- No ferrous particle attraction, preventing contamination in cleanroom environments
- Complete compatibility with MRI-adjacent equipment, wafer handling stages, and precision measurement systems
- Safe integration into medical, semiconductor, and aerospace machinery
| Parameter | Standard Capability | High-Precision Option |
|---|---|---|
| Primary Material | WC-Ni Non-Magnetic Alloy | Also available: Cupronickel, Non-Magnetic Stainless Steel, Aluminum Bronze |
| Hardness Range | 89 - 92 HRA | Consistent throughout the component |
| Magnetic Permeability | < 1.002 (certifiable per batch) | Material-dependent grades available |
| Outer Diameter (OD) Range | 2 mm - 300 mm | Custom diameters available |
| OD Tolerance | ±0.005 mm (standard, h6/g6) | ± 0.001 mm (h4/h5 grade) |
| Inner Diameter (ID) | Custom, through-hole or blind bore | Matched to shaft specification |
| Concentricity (ID to OD) | ≤ 0.005 mm | ≤ 0.003 mm |
| Thickness / Width | 0.5 mm - 50 mm | Custom per drawing |
| Surface Finish | Ra 0.4 μm (ground) | Ra 0.1 μm or better (lapped/polished) |
| Parallelism (End Faces) | ≤ 0.003 mm | ≤ 0.002 mm |
| Working Temperature Range | -200°C to +800°C | Material-dependent |
| Additional Features | Oiling grooves, chamfers, radii, mounting holes, flanges, threads | Per customer drawing |
Our manufacturing process utilizes CNC turning, precision grinding, lapping, and advanced EDM techniques to achieve these exacting tolerances. We specialize in transforming customer drawings into ready-to-install, high-precision components that fit perfectly on the first try.
We understand that every precision application is unique. Our non-magnetic alloy outer diameter rings can be fully customized:
| Customization Parameter | Options |
|---|---|
| Material Grade | WC-Ni (multiple grades from HRA 89 to 92) |
| OD Geometry | Straight, stepped, flanged, tapered, profiled |
| Surface Features | Lubrication grooves (spiral, axial), chamfers (inner/outer), radii, notches |
| Holes / Mounting Features | Radial through-holes, threaded holes, counterbores, slots |
| Surface Treatment | Polished, ground, DLC-coated for dry-running applications |
| Quantity | Prototype (single pieces) to high-volume production |
- Specialized Expertise: Years of experience manufacturing precision non-magnetic components for demanding industrial applications
- Advanced Manufacturing: In-house CNC turning, grinding, EDM, lapping, and polishing capabilities
- Maintenance & Wear Support: The ultra-hard carbide provides tens of thousands of hours of service before needing replacement, drastically reducing total cost of ownership
- Global Supply: Consistent quality, reliable delivery, and professional export documentation worldwide
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.