FUNCTION ON A CONVEYOR BELT
The snub pulley tensions the conveyor belts, forcing the belt to wind a little more onto the nearest drum. The sole aim is to increase the contact surface between the belt and the drum concerned. On a conventional conveyor, for example, the winding angle is around 180°. With a snub pulley, this winding can be increased to 210°. It is often placed just after the head pulley (the drive pulley), but can also be placed just before the tail pulley.
Implementation
As a general rule, this type of drum needs to be cylindrically machined, as its function does not require belt centering, which is carried out on the other conveyor stations.
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Lagging for handling drums
The special feature of the snub pulley is that it is located on the “dirty strand” of the belt. When lined, it’s best to use an anti-clogging lagging to prevent material build-up. This surface has no grip profile, as it has no driving function. If this is not the case, a rubber with a diamond or ceramic profile should be used to ensure a firm grip on the drum. Contact our team to find out more about the different lining and lagging solutions offered by ALTEMA.
TECHNICAL SUPPORT IN DEFINING YOUR PRODUCTS
For over 25 years, ALTEMA has been helping its customers to define their snub pulley. ALTEMA’s customers operate in a wide range of sectors, including mining, quarrying, recycling, food processing, fertilizers and chemicals. ALTEMA’s role is to help its customers optimize the design of their conveyor drums, right from the design phase. The aim is to achieve the best technical-economic compromise and ensure a long product life.
Altema services
RDM DIMENSIONING
ALTEMA's Engineering Department is able to dimension and verify conveyor drums and lifting pulleys using its RDM and 3D CAD calculation software.
Static and Dynamic Balancing
ALTEMA offers balancing solutions and services for high-speed conveyor drums, to keep them running at peak performance.
TECHNICAL SUPPORT
Depending on the application, the field of activity, the transported material and the climatic conditions, ALTEMA offers you specific solutions to optimise your products and improve your performance.
The different drum families
tail pulley
Usually positioned on the other side of the control section on a conveyor belt, this drum is used to return the control section to its original position.
head pulley
The head pulley is the drum that sets the conveyor belt in motion.
Take up pulley
The take up pulley is used to adjust belt tension according to the load to be conveyed.