The outer casing for brake cables in automotive or motorcycle applications is a crucial component that provides protection and facilitates the smooth operation of the inner brake cable. It is commonly referred to as brake cable housing or brake cable outer casing. Here are some key points regarding the outer casing for brake cables:

1. Material: Brake cable outer casings are typically made from durable and heat-resistant materials to withstand the demands of braking systems. Common materials include reinforced plastic, polymer, or metal alloys.

2. Diameter: The diameter of brake cable outer casings can vary depending on the specific application and the size of the inner brake cable it will encase. Common sizes for automotive and motorcycle brake cables range from 5mm to 8mm, although larger diameters may be used for heavy-duty applications.

3. Construction: Brake cable outer casings are often constructed with multiple layers to provide durability and protection. The innermost layer may feature a low-friction lining, such as Teflon or a similar material, to reduce friction and ensure smooth cable movement. The outer layers provide structural strength and resistance to environmental factors such as moisture, dirt, and vibration.

4. Compression Design: Brake cable outer casings are typically designed as compression-type housings. This means that when the brake lever or pedal is engaged, the casing compresses slightly, transmitting the force from the control mechanism to the brake caliper or drum.

5. End Fittings: Brake cable outer casings are equipped with end fittings or terminations designed to securely attach to the brake lever or pedal mechanism and the brake caliper or drum. These fittings ensure proper connection, prevent fraying or unraveling of the casing, and allow for easy installation and adjustment.

When selecting brake cable outer casings, it is important to consult the vehicle manufacturer's guidelines or seek advice from a qualified professional to ensure compatibility and optimal performance for your specific automotive or motorcycle braking system. Different vehicles may have unique requirements, so following the manufacturer's recommendations is crucial for safety and performance.