Method for manufacturing a guide device with roller bodies for a medical mechanism

Method of manufacturing a rolling bodies guide device for a medical mechanism, comprising components, said components comprising:

• a first element,
• a second element,
• rolling bodies arranged between the first element and the second element, to facilitate relative displacement of the first element with respect to the second element,
• at least one component being made of titanium or a titanium alloy
• the method comprising the steps of
• processing the titanium or titanium alloy component;
• performing a diffusion hardening treatment on the machined component,
• the diffusion hardening treatment comprising a step of immersing the titanium or titanium alloy component in a gas.
• the gas comprising at least one atom selected from carbon, nitrogen, argon or oxygen,
• the process comprising the steps of:
• selection of a temperature in the range 500° C.-800° C.,
• selection of a pressure greater than atmospheric,
• wherein the hardening treatment time is in the range 1 h-24 h,
• so that the component comprises a surface layer has a hardness in the range 900 Hv-1100 Hv.