本文介绍使用大螺旋角T形槽铣刀的经验，并对国标T形槽铣刀（GBll26—85）存在的问题提出改进。T形槽铣刀是切削T形槽不可缺少的刀具。一般购买国标刀具直接用于生产。我厂在多年的生产实践中发现，现行国标T形槽铁刀（GB1126－85）存在许多缺陷和不足，使用很不理想。结合本厂 This article introduces the experience of using large helical T-slot milling cutter, and puts forward the improvement of the existing problems of the national standard T-slot milling cutter (GBll26-85). T-slot milling cutter is an indispensable tool for cutting T-slots. General purchase of national standard tools for the direct production. I plant in many years of production practice found that the current national standard T-slot iron knife (GB1126-85) there are many shortcomings and deficiencies, the use is not ideal. With the factory