Businesses in the transmission equipment category supply components and systems used to transfer power or motion between motors, machinery and driven equipment. Products may include gearboxes, speed reducers, gears, shafts, belts, pulleys, chains, sprockets, couplings, clutches and associated bearings. Some suppliers specialise in particular types of equipment or serve industries such as manufacturing, agriculture, construction and materials handling. Services can include selecting components to suit a machine's load, speed and operating conditions, as well as supplying replacement parts and complete drive assemblies. Depending on the business, customers may also be able to arrange equipment design, manufacture, installation, inspection, maintenance, repair or refurbishment. These services help keep machinery operating reliably and may involve replacing worn components, aligning drives or adapting equipment to fit an existing system.