The shaft itself rotates with the wheel, being either bolted or splinted in fixed relation to it, and is called an "axle” or “axle shaft".

Features of 4 MM Shaft Axle:

• Length of the Shaft Axle: 20 cm.
• Diameter of the Shaft Axle: 4 mm.
• Material of the Shaft Axle: Stainless Steel.
• An axle is a central shaft for a rotating wheel or gear.
• On wheeled Robots, the axle may be fixed to the wheels, rotating with them, or fixed to its surroundings, with the wheels rotating around the axle.
• In the former case, bearings or bushings are provided at the mounting points where the axle is supported. In the latter case, a bearing or bushing sits inside the hole in the wheel to allow the wheel or gear to rotate around the axle.

Applications of 4 MM Shaft Axle:

• To increase the length of the motors.
• To attach with the flange for fitting the different accessories.

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