Kettaplaadides

Kettaplaadide is Estonian for the chain plates that form the links of a roller chain. In technical contexts the term kettaplaadide is used to refer to the inner and outer plates that hold pins and bushings together, enabling the chain to bend around sprockets while transmitting torque and motion. The form kettaplaadide is the genitive plural used in phrases such as kettaplaadide kulumine (wear of chain plates).

The plates are the primary load-bearing members of a roller chain. They determine the chain width and the pitch, and together with pins, bushings, and rollers they establish the geometry that permits smooth engagement with sprockets. Outer plates provide structural rigidity and help retain lubrication, while inner plates serve as a host for bushings and pins. The accuracy of plate dimensions and the surface finish influence efficiency, wear resistance, and the chain’s overall life.

Materials and manufacturing commonly involve high-strength carbon or alloy steels, which are heat-treated to improve hardness and fatigue resistance. For environments demanding corrosion resistance, stainless steel or coated plates (for example with zinc or nickel-based coatings) may be used. Quality control focuses on tolerances, surface finish, and resistance to wear and cracking.

Applications include power transmission and material handling systems across bicycles, motorcycles, industrial conveyors, mining equipment, and agricultural machinery. Proper maintenance—regular inspection for elongation or cracks, appropriate lubrication, and correct tension and alignment—extends service life and minimizes downtime. Standards vary by region, with ANSI, ISO, and DIN specifications guiding dimensions and compatibility.