Spool Bolts

Product Overview:

Spool bolts are specialized fasteners designed to provide extra clearance between insulators and poles, particularly in rural secondary construction. These bolts are essential for ensuring proper spacing and stability in electrical distribution systems. They are commonly used with spool insulators to support and maintain electrical lines in a secure manner.

Structural Features:

1. Forged Design:
   • Available in single or double spool configurations, each bolt is forged with an integral washer upset at the insulator end. The single spool bolt has one washer, while the double spool bolt has two washers to provide additional clearance.
2. Extra Clearance:
   • Double upset design provides 1 5/8″ clearance between the insulator and the pole, ensuring proper spacing for secure installation.
3. Rolled Threads:
   • Spool bolts are equipped with 5/8″ rolled threads, enhancing their strength and ensuring secure fastening.
4. Complete Assembly:
   • Each bolt is supplied with all associated hardware, including 2 square nuts, MF type lock nut, round washer, and cotter pin, facilitating easy and secure installation.

Installation Method:

1. Preparation:
   • Ensure that all necessary tools and materials are available before starting the installation process. Verify the specifications of the spool bolts to ensure compatibility with the insulators and poles.
2. Positioning:
   • Position the spool bolt through the designated hole in the pole and align it with the spool insulator.
3. Securing Insulator:
   • Place the insulator on the bolt and position the washers and nuts as required. For double spool bolts, ensure the extra clearance is maintained.
4. Tightening:
   • Tighten the square nuts on both ends of the bolt using appropriate tools to ensure a firm and secure connection. Use the MF type lock nut and cotter pin to lock the assembly in place.
5. Inspection:
   • Inspect the installation to ensure all components are properly tightened and the insulator is securely fastened with the correct clearance.

Applicable Environmental Conditions:

1. Temperature Range:
   • Suitable for operation in temperatures ranging from -40°C to +60°C, ensuring performance in extreme weather conditions.
2. Humidity:
   • Can operate effectively in environments with relative humidity up to 95%, ensuring reliability in moist conditions.
3. Weather Resistance:
   • Designed to withstand harsh weather conditions, including high winds, heavy rain, and UV exposure.
4. Corrosive Environments:
   • The galvanized coating or other anti-corrosion treatments make spool bolts suitable for environments with exposure to corrosive elements such as salt, chemicals, or industrial pollutants.