What do you mean by SPB SPC
Leather belt wheel, belongs to the plate of the plate, the general relative size is larger, the manufacturing process is usually cast, the forging is given priority to. In general, the design of a large size is made of cast iron, and the materials are usually cast iron (the casting performance is better), and the casting steel is seldom used. The general size is small, can be designed to be forged, the material is steel.
Pulley SPA.spb SPC: the specifications of the v belt is A back board (8) and high (thick) by it's size, depending on the back board (8) and the size of the high (thick), the triangle of national standard of O, A, B, C, D, E, such as A variety of models, each model of this triangle 8 section width, and height are not same, so the pulley must according to the shape of A triangle to produce various groove type; These different groove pulley is decided the type O pulley of belt pulley, A pulley, B type pulley, C type pulley, D type pulley, E type pulley and other models.
Belt wheel material and production requirements Ventilator USES the belt wheel for grey cast iron HT200, HT250 and so on (but also using steel parts, copper parts, aluminum parts, etc.). The wheel should be satisfied: the weight is light, the mass distribution is even, and the internal stresses produced in the manufacturing are eliminated, and the pulley should be adjusted for static balance.
SPA is a European standard A beginning is gb QB is the type of cone sleeve What else is there to keep asking, and how to match, to look at the outer diameter of the pulley
It is. Pulley pitch diameter is pulley diameter section line theory, a bit like gear pitch circle diameter. Generally expressed in PD, cylindrical generally expressed in OD. Different type slot pitch circle and cylindrical conversion formula is different, generally we tend to measure to the pulley cylindrical, in according to the formula to calculate the pitch circle. SPZ: OD = PD + 4; SPA: OD = PD + 5.5; .spb: OD = PD + 7; SPC: OD = PD + 9.6. The minimum diameter of A or SPA is 80mm, if it is less than that, especially at high speed, the belt is prone to cracks and cracks in the bottom. The SPZ band, the small wheel is not less than 63mm. Also pay attention to the belt mounting technique and the tension, too small and easy to slip, too big to damage the belt and bearing
