A drive chain consists of the following core components working together:
1. Chain
- Roller Chain: The most common type, consisting of inner and outer plates, pins, and rollers, with a tensile strength exceeding 20 kN (ISO 606 standard).
- Tooth Chain: Using trapezoidal teeth for meshing, it offers lower noise levels and is suitable for high-speed machine tools (speeds ≤ 3000 rpm).
- Leaf Chain: A roller-less structure offers high load-bearing capacity and is often used in heavy-duty equipment such as cranes.
2. Sprocket
- Tooth Design: The tooth profile should be tailored to the chain type. For example, roller sprockets must adhere to the precise relationship of "tooth groove radius = roller diameter x 1.005" (GB/T 1243-2006).
- Material Selection: Medium carbon steel (such as 45 steel) should be quenched to a hardness of HRC 40-45 to reduce wear.
3. Auxiliary Devices
- Tensioning Mechanism: Spring or screw adjustment device to maintain chain sag within 1%-2% of center distance.
- Lubrication System: Oil bath or drip lubrication to reduce friction between the pins and rollers (recommended lubricant viscosity grade is ISO VG100-150).
