CYMA 7mm Gearbox Bushings | High-Strength Upgrade Set (6 Pieces)

When building an Airsoft Electric Gun (AEG) designed for maximum reliability under demanding conditions, structural stability inside the gearbox shell is paramount. The CYMA 7mm High-Strength Gearbox Bushings Set offers a classic, unyielding solution for techs and players executing heavy internal overhauls or power upgrades.

Engineered for High-Stress Resilience

Unlike standard ball bearings which utilize tiny internal spheres that can crush or deform under severe tension, these CYMA upgrades are solid steel bushings. Because there are no moving parts to fail within the bushing itself, they distribute the raw rotational forces generated by high-voltage batteries and high-torque setups across a solid metal block. This makes them the definitive choice for high-power configurations, DMR builds, or fast-cycling setups where component failure isn't an option.

Precision Fitment & Reduced Lateral Friction

CYMA has manufactured these pieces to tight dimensional tolerances, ensuring that standard gear axles sit perfectly centered within the 3mm inner bore holes. The outer 7mm diameter provides a snug, non-slip interface with your gearbox shell, preventing the bushings from spinning or shifting loose inside their housings over time. Their smooth, polished inner faces allow the gear shafts to cycle with minimal friction, facilitating cleaner energy transfer from the motor to the sector gear.

Key Technical Features:

• Solid Steel Construction: Heavy-duty stamped steel alloy yields ultimate resistance against warping or crushing.

• 7mm Outer Diameter (OD): Seamlessly matches standard modern and legacy 7mm AEG gearbox slots.

• Complete 6-Piece Set: Provides the exact quantity needed to completely outfit a standard three-gear AEG drivetrain.

• Ideal for High-Tension Springs: Eliminates the structural blowout risks common to budget ball-bearing variants under load.

• Low-Profile Flange Design: Sits flat inside the housing to ensure clean clearance for your selector plates and shim stacks.

Field & Tech Recommendations

To get the most out of solid bushings, precision shimming is essential. Since solid metal lacks the natural give of ball bearings, any binding can cause unnecessary strain on your motor. Use premium micro-shims to precisely center your gears. During final assembly, apply a high-quality lithium or molybdenum grease directly into the axle tracks to ensure smooth, frictionless long-term operation.