Spline shaft is the main spare part of agricultural machinery products. Its quality will directly affect the overall quality of agricultural machinery products. There are many inferior products in the market, which seriously affects the service life and safety production of agricultural machinery products. When purchasing, pay attention to the following points.

(1) It must have product certificate, product name and model (which shall be consistent with the model of the whole machine), manufacturer's name, factory logo and address (beware of counterfeiting), and manufacturing date (it is better in the near future, generally not more than 1 year);

(2) The package is intact. Open the packing paper and observe the spline shaft surface after removing the antirust oil. It is required to be smooth and free of oxide skin, spots, depressions and burrs. The working surface shall be free of nicks, rust, black spots, knife marks, pits and bumps.

(3) Except for the necessary tool withdrawal groove and grinding wheel over travel groove, there shall be no nicks, knife wounds, cracks, etc. at the root of the spline, at the connection between the shaft and the flange, and at the corner of the table journal.

(4) The surface of the central hole of the spline shaft is smooth and free of oxide skin, because it is the machining reference part, which is directly related to the geometric accuracy of each part.

(5) If you want to purchase in batch, you must sample and check the internal quality, especially the material, heat treatment quality and matching related dimensional accuracy and shape and position accuracy.