钢琴弦轴受琴弦静止的拉力在80公斤以上,调音时还得加上附加应力4％,张槌击弦时增加5％,因此大三角钢琴弦轴的受力会大于150公斤。过去,为了使弦轴在如此巨大的拉力下不松动,保持音准稳定,一般把弦轴钉得向上倾斜一些。但是,很少有人对此进行精确的研究,都是以弦架的弦轴板面为基准,所有的弦轴向上倾斜10°左右,且相互平行。其实,弦轴向什么方向倾斜及倾斜多少角度,应根据拉力的力向和力点的位置 Piano strings are still stressed by the strings at a tensile force of 80 kg or more, with additional 4% additional stress when tuning, and 5% increase when the hammer is struck. Therefore, the stress on the grand piano strings shaft is greater than 150 kg. In the past, in order to make the string shaft under such a great tension not loose, to maintain the sound level stability, the nail shaft is generally tilted up some tilt. However, few people have studied it precisely, all of which are based on the chord plate surface of the stringwork. All the chord axes incline about 10 ° upward and are parallel to each other. In fact, the direction of the string axis tilted and how many angles should be based on the direction of the force and force points