Introduction of half-round key

1. Fixed flat key: the most commonly used flat key, a fixed position transmits torque, and the parts on the shaft cannot be moved. The position can be set at any position at the end of the shaft or the middle of the shaft
2. Guiding flat key: The parts on the shaft can slide axially, and can transmit torque at the same time.
3. Half-round key: Generally, a half-round key is set on the surface of the tapered shaft
4. Wedge-shaped key: generally made into a hook head form (easy to pull the key), the wedge-shaped key is generally set at the end of the shaft, and the positioning is based on the wedge-shaped surface, and the concentricity is not as good as the flat key.
5. Tangential key: bear one-way heavy load, double tangential key can bear two-way load
6. Spline: The adaptable range is the same as that of the flat key, but the load distribution is better than that of the flat key, and the concentricity is higher. However, the spline has a greater weakening of the shaft strength. Therefore, in the design, the shaft of the flat key is thicker than that of the flat key. , Suitable for high-speed shafts and mechanisms with high coaxiality requirements. According to the tooth profile of the shaft end, the splines are divided into rectangular splines and involute splines, etc. According to the longitudinal tooth profile, the splines are divided into the commonly used straight Tooth splines, and special spiral splines (very rarely used)

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