Serpent 402204 DJC sleeve BB alu for Medius X26 steel EP SER400052  [SER402204]

DJC sleeve ball bearing insert

This Serpent 402204 DJC sleeve BB alu is an RC-scale accessory intended to secure and align small ball bearings inside the Medius X26 steel EP (SER400052) chassis where sleeve-type bearing seats are used. The part is described as aluminium, and its role is to provide a stable, wear-resistant seating for 1/10 electric touring car bearing locations.

In practice the sleeve is used to replace worn or deformed bearing seats or to fine-tune lateral play in suspension and drivetrain mounting points. Because the component is a small-scale aluminium insert, it affects bearing fit and play rather than larger chassis geometry; adjustments with sleeve fit can help reduce slop and improve repeatability of suspension movement under load.

Install guidance: clean the housing before fitting, press the sleeve evenly into the bore until flush, and verify bearing runs true with no binding. For tuning, test changes incrementally—small differences in sleeve fit can alter free play and rolling resistance, so check handling on the track after each change.