Bronze Bearings (7 mm)

AirsoftParts 7 mm Bronze Bushings
Bronze is well suited to this application due to its good sliding properties in contact with steel axles, which, with proper lubrication, helps reduce friction and promotes smooth operation of the gear train. The contact surfaces between the bushings and gears feature reliefs that further reduce the friction surface area. The bushings also have no lubrication groove, which according to the manufacturer could contribute to wear on the gear axles. The manufacturer recommends them primarily for builds with M90–M130 springs, while the technical specifications state M140 as the maximum spring rating.
Key Features

Bronze With Good Sliding Properties
A bronze bushing combined with a steel axle offers low friction with proper lubrication, promoting smooth gear operation.

Relieved Contact Surfaces
Relief in the areas contacting the gears reduces the friction surface area and helps reduce mechanical losses in the gear train.

Solid Bushing Design
Unlike ball bearings, the design contains no balls or other moving parts. The gears are guided directly by the sliding surface of the bronze bushings.

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.

For Builds up to M140
The manufacturer recommends the bronze bushings primarily for M90–M130 springs, while the technical specifications state a maximum spring rating of M140.

Technical Specifications

Type: bushings for AEG gearbox
Diameter: 7 mm
Gear axle diameter: 3 mm
Material: bronze
Manufacturing: CNC machining
Lubrication groove: no
Compatibility: gearboxes with 7mm b..