ENGINEERING PULLEYS

DESCRIPTION

Fully machined pulleys to guarantee concentricity between parts. These consider static and dynamic balancing to eliminate vibrations in high-speed belts.

  • Rubber lagging with 50, 60 and 70 shore A hardness, with a ceramic option for high-abrasion applications.
  • Turbine (“T”) end discs minimize risks in welding areas, because it moves the joint area to a less stressed one.
  • Manufacture of high-strength steel shafts (SAE 1045, SAE 4140 and SAE 4340) including liquid penetrant and ultrasonic testing.
  • Submerged arc welding that undergoes inspection with non-destructive testing to guarantee the joints.
  • Stress-relieving heat treatment in the shell-disc assembly to avoid failures from stresses produced during operation.
  • Heavy duty expansion sleeves with protective end discs for easy maintenance.
  • No cotter pins in the shaft-shell joint to avoid critical stress concentrations in the shaft.

ENGINEERING PULLEYS

CHARACTERISTICS

  • UNIT STRESS GREATER THAN 124 KN/MT OR PIW 700
  • DIAMETERS GREATER THAN 30” AND UP TO 60”
  • WIDTHS GREATER THAN 46” AND UP TO 120”
  • SHAFTS GREATER THAN 8”
  • STEEL CORD CONVEYOR BELTS
  • BELTS AT HIGH SPEEDS GREATER THAN 4 m/s
  • CONVEYOR BELTS WITH TRANSIENTS GREATER THAN 50% OF OPERATING TENSION

PULLEY LAGGING

This is the natural rubber coating of the pulley shells, which is made with vulcanizing autoclaves.

WE OFFER DIFFERENT TYPES OF LAGGING:

  • Metallic lagging
  • Smooth rubber lagging, diamond groove lagging and herringbone groove lagging
  • Rubber lagging with ceramic inserts.

HERRINGBONE AND DIAMOND GROOVE LAGGING

espina-pescado rombo

The grooves depend on the pulley size and lagging thickness. This is generally used in one-way drive pulleys, in which the grooves divert water from the center of the pulley, which helps to increase adherence to the belt and keep it cleaner.

The diamond design is mainly used for reverse drive pulleys. It is also used when the rotation direction of the drive pulleys to be replaced is unknown.

These are manufactured in thicknesses from 3/8” to 1” and hardnesses from 55 to 65 Shore A.

CERAMIC LAGGING

ceramico

This is a type of outer lagging, where ceramic tiles are molded into a rubber compound. This makes for excellent traction, reducing slippage and offering excellent abrasion resistance. Available in 3 thicknesses: 5/8”, 3/4”, tensions over 1500 PIW, REVESOL recommends 5/8” and 3/4”. For tensions over 700 PIW or 125 kn/mt.

Dureza60+/-Shore A
Resistencia a la tracción en ruptura (ASTM D412)140kg/cm2 (mínimo)
Elongación en ruptura (ASTMD412)380%(mínimo)
Índice de abrasión TABER (I.A.T.) (Abrasivo S-35, carga: 1000-ciclos: 1000)70 máxima
Resistencia al desgarro (ASTM D624)20 kg/cm2 (mínimo)
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