No products
View larger 
AirsoftParts Steel Bushings for 4 mm axles (8 mm)
AirsoftParts steel bushings for 4 mm axles (8 mm) are CNC-machined bushings for special gears with 4mm axles. They are made from 1.7131 steel, heat-treated for long service life and finished with black oxide. The 8 mm outer diameter is designed for the corresponding gearbox bearing seats, and the manufacturer recommends use with springs up to M200.
25+ years of proven equipment and accessories.
Accessories
4,19 € In StockAirsoftParts Bushing ToolASPARTS037
AirsoftParts bearing installation tool is a practical service tool for installing bearings into a gearbox. The duralumin construction reduces the risk of scratching the bearing surface during installation, while the circumferential grooves provide a secure grip and precise handling. A useful tool for building, repairing and upgrading AEG gearboxes.
4,19 €In Stock- SA Silicone Grease (50 g)
SPARMS439
Specna Arms silicone grease in a practical 50g package is an essential service lubricant for airsoft gun maintenance. It is particularly suitable for O-rings, seals, AEG pneumatic systems, GBB valves and HPA systems. It helps reduce friction, protects sealing components from drying out and extends their service life.
6,34 €Out of stock
AirsoftParts 8 mm Steel Bushings for 4 mm Axles
AirsoftParts 8 mm steel bushings for 4mm axles are plain bushings designed for specific gear sets using gears with 4 mm diameter axles. The bushings are made from 1.7131 steel on precision CNC machines in the Czech Republic and are heat-treated to increase long-term mechanical durability. The contact surfaces with the gears feature reliefs that reduce the friction surface area and promote smooth gear operation. The surface is protected by a black oxide finish, and the manufacturer specifies a maximum recommended spring rating of M200. Correct component matching is essential – the 4 mm inner diameter of the bushing requires gears with 4mm axles, while the 8 mm outer diameter requires corresponding bearing seats in the gearbox.
Key Features
For Gears With 4mm Axles
The inner diameter of the bushing is 4 mm, so it can only be combined with gears equipped with corresponding 4mm axles.
Heat-Treated 1.7131 Steel
The steel construction is heat-treated to increase long-term service life and durability under mechanical stress in the gear train.
Relieved Contact Surfaces
Relief in the areas contacting the gears reduces the friction surface area and helps reduce mechanical losses as the gears rotate.
For High-Load Builds
The manufacturer specifies a maximum recommended spring rating of M200, so the bushings are also designed with mechanically demanding configurations in mind.
Precision CNC Manufacturing in the Czech Republic
The bushings are manufactured on precision CNC machines in the Czech Republic, and their steel surface is protected by a black oxide finish.
Technical Specifications
- Model: LOZ-OC4-8
- Type: bushings for AEG gearbox
- Outer diameter: 8 mm
- Inner diameter: 4 mm
- Gear axle diameter: 4 mm
- Material: 1.7131 steel
- Manufacturing: CNC machining
- Heat treatment: yes
- Surface finish: black oxide
- Dynamic coefficient of friction: 0.37–0.45
- Maximum recommended spring: M200
- Country of manufacture: Czech Republic
Package Contents
- 6× 8 mm steel bushing for 4mm axle
Frequently Asked Questions (FAQ)
Can These Bushings Be Used With Standard Gears?
Only if the gears have 4 mm diameter axles. These bushings have a 4mm inner bore and are not designed for gears with axles of a different diameter.
What Do the 8 mm and 4 mm Dimensions Mean?
8 mm indicates the outer diameter of the bushing for its seat in the gearbox, while 4 mm is the inner diameter for the gear axle. Both dimensions must therefore match for correct installation.
Why Are the Bushings Heat-Treated?
Heat treatment of the steel serves to increase the mechanical durability and long-term service life of the bushings under load from the gear train.
What Spring Strength Can Be Used With the Bushings?
The manufacturer specifies a maximum recommended spring rating of M200. This rating applies to the bushings themselves; the other gearbox and gear train components must also be suitably rated for the given load.
| Variants | ⌀ 4 mm |
| Color | Black |
| Bearings (mm) | 8 (mm) |
| Bearings (material) | Metal |
| Počet kusů v balení | 6 |