The new roller design developed by NIKOM-66 is of stronger and
more rigid construction that minimises body deflection and reduces the
load on its supports. The diagrams clearly demonstrate its improved
moment of deflection, which is half the value typical for conventional
roller designs. The negative moments of deflection transfer additional
load onto the supports, which reduces the load on the bearings
incorporated in the NIKOM-66 design.
1.Traditional Roller Design
1. The typical static deflection of the
spindle in traditional roller designs increases bearing misalignment and
effectively reduces the bearing play to zero, and this play is already
minimised during assembly due to the misalignment of the planes in which
the bearing housings are positioned in the roller.
The rotation creates vacuum inside the
roller, which draws dirt and other particulate matter in the bearing
thus reducing its service life.
During extended shutdown periods the
non-rotating spindle and its protective caps become damp and dusty,
covered with dirty slime depending on the operating environs. When the
roller resumes its normal operation the dirty particles gradually work
their way in through the labyrinth seals and ultimately reach the
The temperature inside the roller rises
during operation, which affects the normal operation of the bearings.
The bearing housing is a through design which requires protection of both ends.
All this substantially reduces the working
life of the roller, which even after repair is further reduced by the
increased misalignment of the bearing housing.
2. NIKOM-66 Roller design
Eliminates bearing loads due to:
ē design faults;
ē assembly faults.
The bearing housing and the bearings are
fitted onto the spindle independent of the inside of the roller shell
and still the manufacturer's tolerance and play requirements are
The rotating motion of the spindle
forces all the accumulated solid and liquid particles away (centrifugal
action) thus preventing their incursion into the bearings.
During extended shutdown periods the
dust, water and mud particles do not run down the bearing housing flange
to the spindle; instead, they are trapped in the void inside the roller
shell and eventually they are thrown out when the roller starts
The NIKOM-66 roller design allows
cooling of the bearings in the bearing housings, which ensures their
normal operation. The roller acts as a cooling fan.
The bearing housing is not a through
design, which guarantees maximum cleanness inside. This roller design
mounted in an idler set allows central lubrication. In the event of
locked bearings on one side, the roller changes its geometry along the
spindle and reduces the friction with the conveyor belt.
Easy maintenance, no technical deflections and misalignments.
3. New Rubber Roller Design by NIKOM-66
Exceptionally reliable performance.
2. Robust and capable of taking dynamic impact loads.
3. Minimal belt snapping risk.
4. Ease of maintenance and high utilization.
The description of the NIKOM-66 plain roller design is applicable to the NIKOM-66 rubber roller design.
4. A New Generation of NIKOM-66 Tension Pulleys
The belt-conveyor start-up no longer
requires turning of the entire pulley, which is typical for the
traditional pulley designs. Instead, the peripheral rollers rotate
around their axes and against the belt and gradually entrain the pulley,
which starts to roll. This means less power draw on start-up and no
belt-pulley skidding. When the belt is not loaded, the outer race of the
bearings in the traditional pulley design usually slips thus damaging
the roller surfaces, which substantially reduces the service life of the
The NIKOM-66 pulley design successfully addresses this issue as described above.