How to properly grind cable trays

Grinding cable trays involves smoothing cut edges and removing burrs using appropriate tools while following safety precautions to prevent injury and material damage.

Tools and Equipment

• Angle grinders: Commonly used for grinding and deburring metal cable trays. They offer flexibility but require careful handling with both hands to avoid accidents and sparks that could damage surrounding materials .
• Band saws: Preferred for cutting low-height or thin metal trays, producing cleaner edges with less debris and noise. After cutting, minor grinding may still be needed to remove burrs .
• Protective equipment: Always wear Kevlar gloves, safety glasses, head protection, and appropriate footwear when grinding or handling trays .

Grinding Procedure

1. Secure the tray: Clamp the cable tray firmly to prevent movement during grinding.
2. Remove burrs: Use the angle grinder or file to smooth sharp edges left after cutting. Focus on edges that could cause injury or interfere with installation .
3. Avoid overheating: Move the grinder steadily and avoid prolonged contact in one spot to prevent warping or weakening the metal .
4. Protect surrounding materials: Cover nearby surfaces to prevent sparks or metal particles from causing damage .
5. Check for sharp edges: After grinding, run your hand carefully (with gloves) along the edges to ensure all burrs are removed.

Safety Considerations

• Handle angle grinders with both hands and maintain a stable stance.
• Do not mix cutting or grinding blades between different metals (e.g., stainless steel and carbon steel) to prevent galvanic corrosion .
• Ensure proper grounding of the cable tray system to reduce electrical hazards during installation or maintenance .

Additional Tips

• For perforated or sheet metal trays, grinding may be minimal if the manufacturer provides smooth edges.
• Always follow local and national health, safety, and electrical standards when grinding or installing cable trays .
• After grinding, inspect the tray for structural integrity and ensure that grounding connections are not compromised . By following these steps, you can safely grind cable trays, remove sharp edges, and prepare them for secure installation while minimizing risks to personnel and equipment.