What is Load Carrying Capacity of Conveyor Rollers?
Updated: Jul 19
Why this question? It is the load that a roller can bear? Yes. But still there are confusions during the
selection of rollers. Novice often make a mistake in understanding the concept behind load carrying of
conveyor rollers. Many times, the load capacities are under estimated considering the roller thickness.
Here one should note that, we are discussing about conveyor rollers of a "Roller Conveyors". Roller
Conveyors are used for conveying carton boxes, components, etc. These are called unit handling
Bulk handling conveyor rollers which are used to make trough belt conveyors are in discussion here.
Please read here about the difference between the two.
Roller Conveyors are of two types broadly.
a. Gravity Roller Conveyor
b. Motorized Roller Conveyor
Gravity Roller Conveyors move the product by way of gravity from higher heights to lower heights. Since
no motor is used in these conveyors, there is no electric or any other consumption. They work on the
basis of gravitational force. Gravity roller conveyors are the most widely used conveyors all over the
Motorized Roller Conveyors move the product with motor. Rollers have various options to run it using
power. Rollers are run with sprockets, timing pulley, o groove and poly v pulley. When controlled product
speeds are required, motorized roller conveyors are used.
The selection of conveyor rollers plays a major role in designing a roller conveyor. The selection of
conveyor rollers depend on
The weight of the component
Load carrying capacity of conveyor rollers
The loading and unloading conditions
Speeds of the conveyor
Out of all these load carrying capacity of conveyor rollers is of major important.
What is so special about that? One has to understand that the load-carrying capacity of a roller is
distributive and not concentric.
If you have to carry a jumbo Bag Pallet of 1 ton weight, it does not mean that the weight capacity of
each roller should be 1 ton. If the size of the pallet is 1mtr x 1mtr, the load is on the area 1sqm. The
rollers which will be in the area of 1 SqM, will have load of 1 ton. This load is not on a single roller. If
there are 10 rollers in this area, the load of 1ton, will be divided on 10 rollers.
It means that if a roller is having length 500mm is given load-carrying capacity as 50Kg, it implies that
you can put a load on the 500mm equally and at once. It is a distributive load.
If you put the weight of 50kg on any small portion of the roller say 100mm, is not allowed. it is concentric
Roller conveyor manufacturers, designers, and users must remember that Conveyor rollers are meant to take the distributive load. Do you have a different opinion? Please comment in the below section.