The HUDY 106060 kit includes four Extra Hard drive shaft pins sized 2.5x10 for RC drive systems. The greater hardness changes shear characteristics and durability compared with standard pins, which can be helpful when tuning drivetrain behavior.
To fit correctly, confirm the 2.5mm diameter and 10mm length are the intended dimensions for your shaft grooves. Press the pin in squarely, then verify free rotation and correct axial play. Because the pins are harder, expect increased shear resistance and altered wear on mating parts; inspect those parts when swapping pins.
Use these pins as direct replacements when the 2.5x10 specification is required and keep spare sets handy to compare failure points while adjusting setups. Never force a pin into an undersized hole to avoid damaging shafts or cups.
Install in matching 2.5x10 housings to restore secure retention and to evaluate different failure characteristics during tuning sessions.
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