X-medics standard ball tolerance is +/- 0.005 mm (AFMBA grade 50) that has been optimized for automated processing and general tolerance requirements when inserted into PEEK and other medical grade materials design. For some bead diameters we also offer a lower (+/- 0.02 mm) tolerance that can offered at a slightly lower cost than our standard tolerance.
> More about Bead tolerances.
Surgical grade tantalum offers a superior biocompatibility and is available in two tantalum metal grades – R05200 (electron beam / vacuum arc melted) and R05400 (sintered). A tantalum marker manufactured from R05200 or R05400 material is equally suitable for surgery and shows identical mechanical and chemical characteristics.
> More about tantalum grades.
X-medics’ beads is available as either standard polished or super polished. The standard polished beads undergo a single polishing step during bead processing and is is a cost optimized option that is suitable for most applications. The super polished beads undergo several polishing steps and has been developed as a high-end option to be used in advanced automated processes.
> Read more about surface finish.
ASTM F86 Cleaning and Passivation
ASTM F86 Cleaning and Passivation is a standard cleaning procedure to remove particles and process residues from the tantalum surface. As ASTM F86 is a cost efficient cleaning method it is specified by 90 percent of X-medics’ customers. In some cases ASTM F86 treatment is not suitable, as the the passivation may increase the thickness of natural occurring tantalum oxide layer on the tantalum surface. The thicker tantalum oxide layer may tend to build up static electricity and increase the surface roughness (friction) of the beads.
> Read more about ASTM F86 cleaning and passivation