Shear Bolt

Price 100.0 INR/ Number

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Shear Bolt Specification

Shape

Surface Treatment
Black-Oxide

Grade
8.8

Head Type
Hex Head

Thread Type
Metric

Diameter
20 Millimeter (mm)

Usage
1. Primary Function: Mechanical Safety Device A shear bolt acts like a mechanical fuse in a system. Just like an electrical fuse blows to protect your home wiring from a power surge, a shear bolt is designed to snap (shear off) when it encounters an unexpected physical overload, protecting expensive machinery from severe damage. 2. Common Applications by Industry Agricultural & Farming Equipment Snowblowers & Snowplows: If the auger hits a hidden rock or ice chunk, the shear bolt breaks instantly so the engine or gearbox doesn't explode or bend internal shafts. Tractors & PTO Shafts: Used on rotary cutters, tillers, and balers to disconnect power if the implement gets jammed by a stump, dense brush, or thick debris. Heavy Construction & Mining Machinery Excavators & Buckets: Protects hydraulic arms, couplers, and pins when digging into unexpectedly solid bedrock or concrete. Crushers & Conveyors: Prevents motor burnout and belt tears if uncrushable metal or wood gets fed into rock-crushing mills. Industrial Manufacturing & Utilities Power Drive Lines & Pumps: Placed in drive couplings. If a pump or mixer motor gets jammed by solid waste, the bolt shears, isolating the motor. Fire Hydrants: Used at the ground flange. If a vehicle hits the hydrant, the shear bolts break at ground level, preventing underground water pipes from bursting or flooding.

Fasteners Type
Bolts

Material
Carbon Steel

Size
M18

Height
87 Millimeter (mm)

Product Type
Industrial

Application
Agricultural machines Protects rotavators, tractors, PTO shafts from overload Gear & shaft connections Prevents damage due to excess torque Conveyors Stops system during blockage or jamming Snow blowers / crushers Breaks when hard objects enter Construction equipment Safety in mixers, drills, etc.

Color
Black

Length
87 Millimeter (mm)

Width
20 Millimeter (mm)

Shear Bolt Trade Information

Minimum Order Quantity
10 Number

Delivery Time
2 Week

About Shear Bolt

High-Tensile Heavy-Duty Shear Bolt Assembly

Overview

Our High-Tensile Shear Bolt Assembly is engineered as a mechanical safety device designed to protect heavy machinery, powertrains, and structural equipment from catastrophic overload. Featuring a precisely machined groove (shear neck), this bolt acts as a sacrificial element that breaks cleanly at a pre-calibrated torque threshold, preventing costly damage to gearboxes, drive shafts, and agricultural or construction equipment.

Key Features

Calibrated Overload Protection: Precision-engineered shear groove ensures consistent, reliable failure at its exact specified torque limit.
Machinery Preserver: Serves as a sacrificial component to protect motors, gearboxes, and impellers from sudden jams or over-torque conditions.
High-Strength Grade Materials: Manufactured from premium alloy steel (Grade 8.8, 10.9, or 12.9) for durable, vibration-resistant daily operation up to the breakaway point.
Corrosion-Resistant Coating: Finished with a protective black oxide or zinc-plated layer to resist rust and environmental wear in harsh working conditions.
Quick & Easy Replacement: Designed for minimal downtimeeasily identifiable and replaceable after a shear event to get your equipment back online fast.

Technical Specifications

Specification	Details
Product Type	Shear Bolt / Overload Protection Bolt
Material	Carbon Steel / Alloy Steel / Stainless Steel (Custom options)
Property Class / Grade	Grade 5 / Grade 8 (SAE) or Grade 8.8 / 10.9 / 12.9 (ISO)
Surface Finish	Black Oxide, Zinc Plated, or Yellow Chromate
Drive / Head Type	Heavy Hex Head / Square Head / Socket Cap
Thread Type	Standard Metric / UNC Fine & Coarse
Shear Value Accuracy	$\pm 5\%$ of rated shear force

Typical Applications

Agricultural Machinery: Snowblowers, balers, rotary cutters, tillers, and tractor PTO shafts.
Heavy Construction Equipment: Excavator buckets, concrete mixers, and drive couplings.
Industrial Manufacturing: Conveyor systems, crushing mills, and gear reduction drives.
Marine & Aerospace: Winches, propellers, and specialized mechanical linkages.