Belts

On shop.atti.it, ATTI offers V-Belts, toothed belts, and weldable belts, along with the accessories to mount them: locking plates and Motor Slide Bases. V-Belts transmit motion through friction and are used on pumps, fans, compressors, and machines in general, in classic profiles (Z, A, B, C), narrow (SPZ, SPA, SPB, SPC), and notched (AX, BX, XPZ, XPA…). Toothed belts (HTD, T, AT, GT, and other profiles) transmit motion without slipping and are used where a precise ratio is needed, such as in positioning and linear axes. Weldable polyurethane belts are cut to size and joined into a loop. On shop.atti.it, you can also find brands like Gates.

It depends on what the transmission needs to do. The V-Belt works through friction: it allows a slight slip (usually around 1–2%), absorbs shocks and vibrations well, and is the most economical choice for transmitting power at a constant speed. The timing belt engages with the pulley like a gear: it does not slip, maintains the exact transmission ratio, requires lower mounting tension, and is suitable for synchronizing multiple shafts or precise positioning. In summary: V-Belt for transmitting power simply and robustly, timing belt when synchronization matters. If you have doubts about the choice, the ATTI technical office can advise you based on the transmission data (power, RPM, center distance, pulley diameters).

The quickest way is to read the code printed on the back of the belt and search for it on shop.atti.it, for example “SPB 1250” for a trapezoidal belt or “800-8M-30” for a HTD synchronous belt. The code indicates profile, length, and for synchronous belts, pitch and width. If the code is no longer legible, you can measure the section and length of the belt, or derive the data from the pulleys and the center distance. For synchronous belts, it is also advisable to count the number of teeth. If you cannot find the code in the online catalog, ATTI can also search for it among products not published on the site: send us the code, a photo, or the measurements and we will send you a quote.