supply of worm gear , worm gear with the following specifications: outer diameter: 230 mm, inner dia meter: 155 mm, and thickness: 40 mm. number of teeth: 31. material: phosphor bronze. note: 1 ) material test certificate from an nabl-accredited laboratory shall be provided along wit h the supply. 2) the supplies shall be guaranteed for workmanship, quality, and performanc e for a minimum period of 18 months from the date of supply. any failure during this period shall be replaced free of cost. 3) the tenderer should visit rwf to collect sample data bef ore quoting. [ warranty period: 18 months after the date of delivery ] ]