The conveyor width is the width of the conveyor frame without the tails. The belt is narrower to allow for
self-adjusting tracking, between 10 and 50 mm depending on the system.
The conveyor length is a nominal dimension and is defined as the outer distance of the head parts when
the system is not tensioned. The actual conveyor length is longer and is calculated based on the following
aspects (specifications apply at an ambient temperature of 20°):
Belt tensioning distance of approx. 0.3% of the conveyor length
Belt length tolerance of up to 0.8% of the conveyor length
Belt thickness tolerance of 1 to 5 mm per side
Rollers protruding over the head parts by 1 to 3.5 mm per side
If a precisely defined installation length is strictly required, this can be accomplished using lower belt
To ensure that the belt runs safely and stably, the conveyor must not fall below or exceed a specific
length-width ratio (1:1 to 50:1).
A stable area without restrictions has a ratio of length to width from 2:1 to 20:1 (i.e. from twice as long as
wide, to 20 times as long as wide).
Likewise, a range from 1.5:1 to 2:1 is also usually possible without restrictions, but requires a design test.
The range of 1:1 to 1.5:1 can only be implemented with supplemental measures and restrictions.
In the range of 20:1 to 50:1, only laterally stiff belts must be used; in addition, transverse forces are no
longer permissible. They occur, for example, when there is lateral movement, lateral product discharge,
lateral product transfer, lateral product alignment using a side rail and asymmetric load distribution.
The maximum conveying speed depends on the motor selected, the load capacity, the operating mode and
With an indirect chain drive with a ø 50 mm roller, a speed of up to 80 m/min is possible. The selection of a
timing belt for force transmission is recommended for 30 m/min or higher, and is standard for 60 m/min or
higher and cycling operation. Slim rollers are balanced for speeds of 60 m/min or higher, and dynamically
balanced for 100 m/min or higher.
For high speeds, it is sensible to choose large driving rolls (e.g. for 80 m/min with the GUF-P 2000, a BC
drive with a ø 88 mm roller).
The mk reglomat lets you control the conveyor speed within a range of 1:7 (10–70 Hz), assuming an
alternating current and the nominal speed at 50 Hz. For internal drives (drum motors), the adjustment
range is 1:3 (20–60 Hz). With direct current, the range is 1:6 (0.25–1.5 A or 0.5–3 A).