An electric airsoft gun bearing spacer, or shim, is a small part used in a gearbox to precisely adjust the position between the gears and minimize friction. Bearing spacers can be important to the efficiency and performance of airsoft guns. Some important uses:
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Minimizing friction: Properly adjusted spacers help minimize friction between the gears. This allows the electric motor to drive the gears more efficiently, which can improve the gun's performance and provide a longer life.
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Protection of bearings: Correctly adjusted spacers can prevent excessive load and friction on the bearings. This can help prevent premature bearing wear and failure.
Correct adjustment and use of bearing spacers requires great precision and is usually done by gun maintenance or development professionals or airsoft mechanics. However, when used properly, they can help improve the performance and durability of airsoft guns.