Steel

Item#01

Steel rollers - PSV SERIE
Typical application for the PSV rollers are: mines, quarries, cement plants, coal-fired power plants, port installations.
The effectiveness of the PSV roller sealing system provides the solution to the environmental challenges of dust, dirt, water, low and high temperatures or applications where there is a large temperature gap between day and night. The working temperature, with standard greased components is defined as between -20°C and + 100°C. It is possible to reach temperatures outside of this range using special grease, bearings and seals.

Steel rollers - Series MPS
For medium duty conveyors at high and medium speed shaft diameter 15 and 20 - tube diameter from 50 to 108.

Heavy duty rollers
See related section "heavy duty".

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STEEL - Roller selection
If you have already decided
• roller dimensions as A, B, C lengths
• shell and shaft diameter
• bearings size
• slots
• eventual rubber rings or special coatings
• and the load capacity
the roller selection can be done by simply looking into our catalogue pages and finding the correct roller to suit the requested data.

In the case that only the conveyor data is known, but the roller size is not decided, the roller selection type (series, steel, plastic, coated) and dimensions (shell and shaft diameter, bearing size, eventual rubber rings) depends on the following application data. This data must be given by the conveyor designer (for new projects) or by the end user or maintenance contractor (for spare parts):
• Belt width [mm]
• Conveyor capacity [t/h)]
• Belt Speed [m/s]
• Belt weight per meter [kg/m]
• Roller diameter (if stated) [mm]
• Idler sets distance (stations pitch) [mm]
• Angle of the side rollers (20°, 30°, 35°, 45° or other)
• N° theoretical bearing lifetime hours L10h requested (10.000, 30.000, 50.000 or other)
• Material lump size (max material block dimension) [mm]
• Transported material type, condition (dry, wet, sticky), abrasion, corrosion
• Climate, max & min temperature, marine or chemical corrosive environment.

For return rollers selection in addition to the above data :
- Are they a single flat return roller or V-return rollers?
- Are rubber rings required on the tube?
- What would be the: base roller diameter/rubber ring diameter (if stated)
- Their configuration (NG, NL, NC etc. see catalogue pages).

For impact rollers calculation selection:
- Drop height of material [mm]
- Max material lump size[mm]
- Type of loading (free fall on the belt, hopper, loading inclined plane, extractor conveyor).

According to this data and a proper load capacity and lifetime calculation (see our technical chapter), the rollers can be selected and dimensioned.

For help and guidelines with regard to roller loading capacity we refer to our roller catalogue (direct download our catalogue from this web site or request it from your local Rulmeca offices.)

In case you are not familiar with this selection and calculations, please fill accurately the attached "Bulk roller selection form" with all the requested data and send it to your local Rulmeca office.

Download “BULK ROLLER SELECTION FORM”

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