Tool tips of the circular saw for the steel cutting have commonly applied to brazing type welded the saw body to tips. In this case, when the tool tip is required to the exchange, many problems were occurred as the exchange cost is high and its time is long. In this study, to resolve the brazing type circular saw, the insert type circular saw has designed and made. Also, to confirm the performance of new type circular saw, the various experiments were carried out under condition of tip's shape and machining conditions.