Biostimulator transport system having weldless bearing retainer

A torque shaft assembly, comprising:

• a torque shaft having a distal shaft end;
• a docking cap having a docking cavity to receive an attachment feature of a biostimulator, the docking cap mounted on the distal shaft end and having a neck having a radially outward surface, wherein the docking cap has an inner bearing retainer having a distal retainer face;
• and
• a bearing slidably mounted on the radially outward surface of the neck, wherein the bearing has a proximal bearing face in sliding contact with the distal retainer face.

A biostimulator transport system, comprising:

• an outer catheter having a distal catheter end and an inner lumen;
• a torque shaft extending through the inner lumen to a distal shaft end;
• a bearing housing mounted on the distal catheter end, wherein the bearing housing includes a proximal recess to receive the distal catheter end, and wherein the proximal recess includes a tapered wall;
• a docking cap having a docking cavity to receive an attachment feature of a biostimulator, the docking cap mounted on the distal shaft end and having a neck having a radially outward surface, wherein the docking cap has an inner bearing retainer having a distal retainer face;
• and
• a bearing radially between the bearing housing and the docking cap, wherein the bearing is slidably mounted on the radially outward surface of the neck, and wherein the bearing has a proximal bearing face in sliding contact with the distal retainer face.