Camouflage forest OUTER WRAP
Cable outer casing, also known as cable housing or cable sheath, is a protective covering used for control cables in various applications such as bicycles, motorcycles, automotive vehicles, or mechanical systems. It encloses and protects the inner control cable, providing a smooth and reliable interface between the control mechanism (e.g., brake lever, shifter) and the component being controlled (e.g., brake caliper, derailleur).
Here are some key aspects of cable outer casing:
1. Material: Cable outer casing is typically made of a durable and flexible material, such as plastic, reinforced polymer, or metal alloy. The material is chosen to provide strength and protection against environmental factors, including moisture, dirt, and mechanical stresses.
2. Diameter: Cable outer casing comes in various diameters depending on the application and the size of the inner control cable it will encase. Common sizes for bicycle control cables range from 4mm to 5mm in diameter, while automotive or industrial cables may have larger diameters.
3. Construction: Cable outer casing is often constructed in layers. The innermost layer consists of a low-friction lining, such as Teflon or a similar material, to reduce friction between the control cable and the casing. The outer layers provide structural strength and protection.
4. Compression (Brake) or Compressionless (Shifter): Depending on the type of control cable, the outer casing may be designed as compression or compressionless. Brake cables typically use compression-type casing, which compresses slightly when the brake lever is engaged, transmitting force to the brake caliper. Shifter cables often use compressionless casing for precise and immediate shifting response.
5. End Caps: Cable outer casing is usually equipped with end caps or ferrules at both ends. These end caps secure the casing to the cable stops or housing guides, preventing fraying and providing a clean entry point for the control cable. Some end caps also feature seals to protect against moisture and dirt.
When replacing or selecting cable outer casing, it is important to consider factors such as compatibility with the specific control cable, the diameter required, and any specific recommendations from the manufacturer or component supplier. Proper installation, including routing the casing correctly, securely attaching it, and trimming it to the appropriate length, is crucial for optimal performance and longevity of the control cable system.
Regular inspection and maintenance, including checking for signs of wear, damage, or moisture ingress, are recommended to ensure the reliability and longevity of the cable outer casing.
Size(mm) | Material of inner hose | Size of steel wire(mm) | Flattening thickness of steel wire | Material of coating | Tolerance of OD | ID of inner hose(mm) |
∮4 | PE/POM/PTFE | 1 | 0.48/0.55 | PVC/PP/PA6 | ±0.05 | 1.5/1.4 |
∮5 | PE/POM/PTFE | 1.1/1.2/1.3 | 0.48/0.55/0.6/0.7 | PVC/PP/PA6 | ±0.05 | 2.2/2.0/1.9 |
∮6 | PE/POM/PTFE | 1.4 | 0.7 | PVC/PP/PA6 | ±0.05 | 2.4/2.6 |
∮7 | PE/POM/PTFE | 1.6/1.8 | 0.85/1.0 | PVC/PP/PA6 | ±0.05 | 3 |
∮8 | PE/POM/PTFE | 1.8/2.0 | 1.0/1.25 | PVC/PP/PA6 | ±0.05 | 3.3/3.6 |
∮9 | PE/POM/PTFE | 2 | 1.1 | PVC/PP/PA6 | ±0.05 | 4.1 |
∮10 | PE/POM/PTFE | 2.2 | 1.25 | PVC/PP/PA6 | ±0.05 | 4.6 |