HPI Baja 5b Series Precision Steel Clutch Bell 5mm Bore SBJ613 by GPM  [SBJ613]

Precision steel clutch bell engineered for Baja drivetrains

The SBJ613 is a purpose-made steel clutch bell with a 5mm internal bore for HPI Baja 5b, 5b Ss and 5T applications referenced in the title. Supplied as a one-piece set, it includes the retaining screw and lock nut necessary for secure pinion-mounted clutch attachment.

Functionally the bell transfers motor torque into the clutch assembly within the driveline. Its steel construction is selected for robust wear resistance under standard RC running conditions. Verify the 5mm bore on your motor or pinion shaft for correct interference before installation to ensure a precision fit.

Assembly guidance: remove the existing bell, align SBJ613 onto the pinion or shaft so the 5mm bore seats fully, install the supplied screw and lock nut and apply a modest controlled torque to prevent loosening under vibration. Confirm correct thread engagement and check axial runout post-fitment to ensure even engagement with the spur gear and clutch shoes.

Select the SBJ613 when a durable, precision-fit steel bell is required for HPI Baja 5b series drivetrains, and follow proper alignment and fastening practices to preserve driveline reliability.