The Critical Pin – Reducing Fatigue Failures

CONVEYOR CHAIN FACT SHEET, 2007-01

Issued by the CEMA Conveyor Chain and Sprocket Section, the document describes how fatigue cracks originate at stress concentration points and why pins are especially vulnerable under repeated loading. It highlights induction hardening as the most effective and practical method for improving fatigue resistance by placing the pin surface in compression, reducing crack initiation and growth.

The Fact Sheet also addresses corrosion-related fatigue, noting the limitations of plating and reinforcing the benefits of induction-hardened pins in corrosive environments. It provides clear, actionable guidance for specifying chains with improved durability.

• Document Type: Fact Sheet

• Committee/Section: Conveyor Chain and Sprocket Section

• Intended Audience: Engineers, maintenance professionals, buyers

• Applies To: Conveyor and power transmission chains

• Publication Year: 2007

• Length: 1 page

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