Steel Bearings (7 mm)

AirsoftParts 7 mm Steel Bushings With Electroless Nickel Plating
The design features relieved contact surfaces between the bushings and gears, intended to reduce the friction area and promote smooth operation of the gear train. The surface is treated with an electroless nickel coating with a hardness of 660–850 HV (58–63 HRC), which increases wear and corrosion resistance while providing a very smooth sliding surface. The bushings intentionally have no lubrication groove, which according to the manufacturer could contribute to wear on the gear axles. These are solid bushings without balls, suitable even for mechanically demanding builds; the manufacturer specifies use with springs up to M170.
Key Features

Solid Steel Construction
Steel bushings contain no balls or other moving parts and provide solid support for the gear axles inside the gearbox.

Electroless Nickel Plating
The nickel-plated surface reaches a hardness of 660–850 HV (58–63 HRC) and contributes to high wear resistance, corrosion resistance and low friction.

Relieved Contact Surfaces
Relief in the areas contacting the gears reduces the friction surface area and promotes smoother gear operation with lower mechanical losses.

No Lubrication Groove
The bushings have no lubrication groove that could create an edge acting against the gear axle. This design maintains a continuous sliding surface around the axle.

CNC-Machined in the Czech Republic
The bushings are machined on precision CNC machines in the Czech Republic, and the manufacturer recommends them for gearboxes with 7mm bearing seats and springs up to M170.

Technical Specifications

Type: bushings for AEG gearbox
Diameter: 7 mm
Gear axle diameter: 3 ..