The new 3000 series CEMA D idler from Hewitt-Robins represents the latest in quality product design improvements and manufacturing.  This idler meets CEMA D dimensional standards and exceeds CEMA D load ratings.

Improved Shaft Design - The new 3000 series shaft, on all return rolls and all troughing rolls for 42” belt width and wider, is a 1 1/4" diameter tube swaged down 3/4" at each end.  The swaging process reduces shaft deflection and assures alignment of the tapered roller bearings.  The redesigned shaft is supplied with a new adjusting nut completely onto the shaft.

Improved End Disc Design - The new 3000 series end disc houses the new bearing and seal.  The end disc weld, located inside the shell, is protected from wear due to belt misalignment.

Improved Bearing Design - The new 3000 series bearing is a 3/4", modified geometry, tapered roller bearing.  This new bearing has higher radial and dynamic load ratings than the old style 1" tapered roller bearing.

Improved Seal Design - The new 3000 series seal features a quadruple sealing system in combination with an outer shield and flinger. The large diameter outer shield and inner seal assembly is centoured to the end disk for close tolerance. This combination acts as a deflector to better exclude contaminants. Inside the outer shield is a grease-filled, multiple-path horizontal labyrinth seal. Internal to the seal is a greased-filled, dual path vertical labyrinth seal and a dual purpose, light contact lip seal to help exclude contaminants and to prevent complete purging during regreasing. This lip seal flexes against the vertical labyrinth member during regreasing to prevent purging all of the grease out of the bearing cavity and returns to light contact after the internal pressure is equalized during operation.