Major business houses, including the Tatas and Mahindras, have been hit hard due to the crisis in their ancillary units, which are reeling under rising raw material and power costs. Small and medium industrial units here are supplying spare parts and various components to industrial majors like Tatas, Larsen and Toubro, Mahindra and Mahindra, Crompton Greaves, and the Kirloskars. However, as these units…