带锯条悬挂在带锯机上下两个锯轮上,高速回转时,由于离心力的关系,它的两个边缘即前口和后口伸张,产生松驰,加上锯齿侧受切削木材抵抗力及切削磨擦热的影响,更加伸张松驰,因此不能承担切削工作,必须给于适当的圆势、弯势,使锯条腰软口紧,两边比中间紧,前口比后口紧,适合于切削伸张 (见图16) Band saw blade hanging on the sawing machine up and down the two saw wheels, high-speed rotation, due to the centrifugal force, its two edges that the front and rear openings to stretch, resulting in slack, coupled with sawtooth by cutting wood resistance and Cutting friction heat, more stretch, it can not afford cutting work, must give the appropriate circular potential, bending potential, so that the blade waist soft tight, tight than the middle on both sides, the front mouth than the tight mouth, suitable for cutting Extensions (see Figure 16)