CBN Grinding Wheels – Artificial Hip and Knee Joints

Artificial hip and knee joints replace damaged joints with implants and place high demands on the dimensional accuracy and surface quality of the functional surfaces. The final geometry and defined roughness values are frequently ensured in production through grinding processes.

Implant components are permanently exposed to high mechanical and chemical loads in service. Materials such as titanium alloys, CoCr alloys, or ceramic pairings are therefore predominantly used, requiring thermally safe and stable machining.

For these applications, CBN grinding wheels and matching dressing solutions are engineered specifically for each process. Bond, grit, and carrier design are matched to the material, machine kinematics, and grinding strategy to achieve reproducible results and consistent dressing intervals.

Product program

• Application: grinding of femoral components for hip implants
• Product types: cylindrical and profile grinding wheels
• Bond: ceramic (VEWN) – low heat input, no surface-layer damage
• Grit sizes: B76 – B151
• Materials: CoCrMo, Ti6Al4V
• Dimensions: Ø up to 650 mm

Process and benefits

• Stable dressing behavior – longer reproducible process phase between two interventions in the validated grinding process
• Consistent surface integrity – uniform roughness and secure taper fit over the entire production run
• Reduced thermal impact – minimized risk of grinding burn, surface tensile stresses, and microstructural changes

Application example

VBW | EHWA ceramic bond – grinding of femoral components (hip implants, CoCrMo / implant steel) in series production.

Result: fewer tool changes, consistent material removal, reduced heat generation, and lower unit costs through stable cycle time.