About rachet helmet
A safety helmet is a rigid, durable form of personal protective equipment (PPE) designed to protect the head from falling objects, impacts, electrical hazards, and burns in industrial or construction environments. Composed of a hard outer shell (typically ABS or HDPE) and an internal suspension harness, it absorbs shock and distributes impact forces to prevent brain injury.
Key Features and Components
Shell: Rigid outer part (ABS, HDPE, or fiberglass) providing penetration resistance.
Harness/Suspension: Internal webbing/plastic strips that absorb shock by separating the head from the shell.
Adjustment System: Ratchet or pin-lock systems to ensure a snug, secure fit.
Chin Strap: Secures the helmet to prevent it from falling off, often at least 19 mm wide.
Ventilation: Optional air vents to improve comfort, particularly in hot climates.
Accessories: Compatibility with accessories such as ear muffs, visors, and headlamps.
Common Standards and Classifications
EN 397: Defines industrial safety helmets, including requirements for shock absorption and penetration resistance.
IS 2925:1984: Indian standard for industrial safety helmets.
Classes: Some helmets are designed for high-voltage protection, protecting against alternating voltage up to 1000V AC or 1500V DC