Tanderun zafin jiki na musamman ne na kayan aiki da aka tsara don tsayayya da matsanancin yanayin zafi da kuma samar da yanayin zafi mai sarrafawa don matakai daban-daban na masana'antu.Maɗaukakin zafin jiki yana taka muhimmiyar rawa a aikace-aikacen maganin zafi irin su annealing, brazing, sintering, da tempering. Suna sauƙaƙe jujjuyawar albarkatun ƙasa zuwa samfuran ƙãre tare da ingantattun kayan aikin injiniya da ingantattun daidaiton tsari.