There are many ways for a straight shaft, but for a pump, the easiest way to do it on site is to twist the straight shaft method. A brief introduction is as follows: On a straight shaft, place the shaft on hardwood (or square iron with copper skin) with the concave side up. Then use a hammer, twist rod beat, the shaft of the concave material by the beating and extension, the shaft straightening. Twist rods are generally made of hard steel, the lower arc to be consistent with the shaft surface, the purpose is not damaged in the twisting of the shaft surface, brass rods can also be used for twist rod. Beat the first place from the maximum curvature of the beginning, hit the range of one-third of the circumference can be pre-drawn on the shaft. One-third of the arc center to play a few more times, the less the number of playing on both sides of the less. The initial straight faster, later slower, in the twisting process, to measure changes in shaft bending in time, do not overplay. The support is softer than the twist bar and has a large contact with the shaft. If this is not the case - that is, the support is harder and the contact area with the shaft is small, then it is equal to the convex and concave surface twisting together, the shaft is not easy to align.
