Snowblower shear bolts

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

Snow blower shear bolts (also called shear pins) are crucial safety components designed to protect your snow blower’s auger and drivetrain from damage when hitting heavy obstructions like ice, rocks, or debris.

Purpose:

• They are engineered to break under excessive force, preventing damage to the auger, gearbox, or other drivetrain parts.

• By shearing, they act as a mechanical fuse, saving you from costly repairs.

• Snowblower shear bolts

How They Work:

1. When the auger hits a hard object, the bolt snaps at a predetermined torque threshold.

2. This disengages the auger or impeller, stopping the transfer of force to internal components.

3. Once broken, the shear bolt must be replaced before resuming operation.

Key Features:

• Material: Made from softer metals (often grade 2 or 5 bolts) to ensure they break before other components.

• Precision Strength: Designed to shear at a specific load, matching the machine’s tolerance.

• Standard Sizes: Common sizes include 1/4″-20, 5/16″-18, or 3/8″-16 (varies by model).

• Shouldered Design: Some have an unthreaded section to ensure they break in the correct spot.

Replacement Tips:

• Always use OEM or exact-spec shear bolts—regular bolts can damage the machine.

• Carry spares—they’re inexpensive and essential during heavy snow clearing.

• Check regularly—a missing or worn shear bolt can lead to drivetrain failure.

• Snowblower shear bolts

Where They’re Located:

• Typically found on the auger shaft or impeller shaft, securing the rotating components to the drive mechanism.

If your snow blower suddenly stops throwing snow but the engine runs, a broken shear bolt is often the culprit. Replacing it is usually a quick fix!