Conveyor Idlers

All conveyor rolls manufactured by Lorbrand contain self cleaning frictionless centrifugal bearing seals which have major advantages over traditional greased labyrinth seals.
	The revolutionary centrifugal self-cleaning action of the seal ensures that the bearings are able to reach their designed life. Grease-free sealing elements result in much lower friction values than conventional designs.

Benefits

      Significant conveyor cost savings
      Power savings.

Lorbrand Centrifugal Seal

Labyrinth Seal

 

	Centrifugal Seal		Labyrinth Seal
Sealing	Dirt which enters the seal is expelled by centrifugal forces (3 - 9 times gravitational force).		Dirt which enters the seal is usually trapped by the centrifugal forces and the grease. The contaminated grease can act as a grinding paste, causing roll seizure.
Running Friction	Same as the bearing friction since the centrifugal seal is frictionless.		Bearing friction plus labyrinth seal friction.

Lorbrand Steel Rollers

Lorbrand has a large range of rollers to suit most conveying applications. This enables the customer to choose the most cost-effective alternative. Installations include coal, gold, platinum, diamond, molybdenum and copper mines, ship loading terminals and long high capacity conveyors throughout the world.

Cost savings

Low running friction results in power savings.
The reduction of required belt tensions may make it possible to select a lower class belt on long conveyors.
The cost saving of selecting such a belt could be of the same order or more than the cost of the structure and idlers.
Lower belt tensions increase idler, pulley and belt life.

Lorbrand Idlers for Heavy Duty Applications

High quality Lorbrand idlers offer our customers service for life. For years and years they’ll ask for nothing – not even a re-grease! They keep on running while you reap the following rewards:

Low downtime because of longer replacement intervals achieved by a high level of manufacturing accuracy.
No maintenance because sealed deep groove ball bearings are used which require no re-greasing – sealed for life.
Decrease belt wear and power consumption because of a much lower roller running friction, very low T.I.R. and high accuracy roller support manufacture.
International patented frictionless self-cleaning sealing arrangements.

Choose Lorbrand idlers with ratings from light to ultra heavy duty to work for you – for life.

Seal Design

Primary sealing – The success of the primary sealing area lies in the fact that dirt which enters is allowed to escape. The metal seal collects dirt and flings it radially outward due to centrifugal force (3-9 times gravitational).

Secondary Seal – Dirt which enters secondary sealing area is again propelled outwards by centrifugal force. All sealing surfaces are clean and free from contact and do not require packing with grease. The sealing arrangement is so designed that water drains out of the seal when the idler is stationary. Most secondary seals on the market are of the labyrinth type and centrifugal forces actually trap dirt in the sealing area, thus forming a grinding paste which can work its way to the bearing.

Bearing Seal – Greased for life bearings complete with seals on both sides are used. The bearing seals form the final barrier against dirt ingress, especially rust particles which are formed due to condensation inside the shell tube.

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