Flat head shear bolt

Cold heading process is one of the new processes for pressure machining of less or no cutting
metal. It is a processing method that utilizes the plastic deformation of metal under the action of
external forces, and with the aid of molds, redistributes and transfers the volume of metal to form
the required parts or blanks. The cold heading process is most suitable for producing standard
fasteners such as bolts, screws, nuts, rivets, and pins.etc

Flat head shear bolts are specialized fasteners designed to break or “shear” at a specific torque or load, protecting machinery from damage by preventing overload. Here’s a detailed description:

Features of Flat Head Shear Bolts:

1. Head Design:

   • Flat Head (Countersunk): Allows the bolt to sit flush with the surface when installed, reducing protrusion and improving aerodynamics or safety in moving parts.

   • Shear Groove: A pre-weakened section (usually under the head or along the shank) ensures controlled breaking at a predetermined torque.

2. Material:

   • Typically made from hardened steel, stainless steel, or other high-strength alloys to ensure consistent shear strength.

   • May have corrosion-resistant coatings (e.g., zinc plating) for durability.

   • Flat head shear bolt

3. Function:

   • Acts as a mechanical fuse, shearing off when excessive force is applied (e.g., in agricultural equipment, snowblowers, or conveyor systems).

   • Prevents costly damage to gears, shafts, or other components by failing first.

4. Thread Type:

   • Fully or partially threaded, depending on the application.

   • Thread pitch may be coarse or fine, matching the machinery’s requirements.

Applications:

• Agricultural Machinery: Protects drivelines in tractors and harvesters.

• Snowblowers & Rotary Cutters: Shears when blades hit obstructions.

• Industrial Equipment: Used in gearboxes, couplings, and safety clutches.

Why Use Shear Bolts?

• Safety: Prevents catastrophic failure.

• Cost-Effective: Replacing a bolt is cheaper than repairing machinery.

• Precision: Engineered to shear at exact loads for consistent performance.

Installation Tips:

• Always use the specified grade/size—improper bolts may not shear correctly.

• Tighten to the recommended torque; over-tightening can prematurely weaken the bolt.

• Flat head shear bolt

• Replace with identical shear bolts after failure—never substitute with standard bolts.