The friction material bonded or riveted to the brake arm shoe that contacts the brake drum or disc surface to generate retarding torque during braking.
Full Definition
Elevator brake linings are formulated from non-asbestos organic (NAO) or sintered metallic compounds to provide a stable, consistent coefficient of friction (μ = 0.3–0.45) over the operating temperature range of −20°C to +180°C. The lining must maintain its friction coefficient under wet or contaminated conditions and resist glazing (surface hardening from heat) which reduces μ significantly. Lining thickness is typically 8–12 mm when new; replacement is required when worn to the minimum permitted thickness (usually 2–3 mm or per manufacturer's data). Lining material hardness, porosity, and thermal conductivity are specified in the machine type-examination certificate. Asbestos-containing linings are prohibited in Turkey and the EU since the 1990s. The braking surface area is calculated to ensure permissible contact pressure (typically ≤0.5 MPa) and thermal flux density remain within limits during emergency stops.
