👉 The belt fluid, also known as anti-friction or lubricating fluid, is a specialized oil designed to minimize friction and wear between moving parts within a belt-driven system. It's typically a low-viscosity, high-performance oil formulated to provide excellent lubrication even under high temperatures and pressures. This fluid forms a protective film between the belt and the pulleys or sprockets, reducing direct metal-to-metal contact and preventing premature wear, slippage, and noise. The belt fluid also helps dissipate heat generated by friction, ensuring the system operates efficiently and reliably over time.