Product Description

Our 24.80” diameter Motorized Pulley range offers two different performance levels for BULK applications:

  • M for Medium duty
  • H for Heavy duty

It is important to note the product differences and choose the appropriate pulley based on estimated belt tension (radial load.) The actual radial load must be less than the maximum allowable radial load shown in this catalog.

Be aware of increased belt tensions required to drive multi-ply thick heavy belts and/or larger belt widths.

If the 24.80” diameter model is not strong enough to resist estimated belt tension, then select 31.50” diameter model.

M for Medium Duty

A solid 2-stage gearbox enables the 630M to handle irregular loadings in harsh operating conditions. 630M uses motor and gearbox from 500H.

Note that 630M outer dimensions do not match 630H.

H for Heavy Duty

630H has stronger internal components with gearbox, shaft, and bearings designed for tough, irregular, and extreme operating conditions.

Standard Specification of Motorized Pulley

  • Energy efficient & quiet
  • Crowned mild steel 24.80” diameter steel shell painted yellow at a minimum thickness of 2.4 mils
  • Bolted powder coated cast iron bearing housings and covers, all painted yellow at a minimum thickness of 2.4 mils
  • Mild steel shafts with nitrided shaft sleeves.
  • Shaft sealing system – degree of protection IP66/67 (EN60034-5.)
  • Cast iron terminal box for painted yellow at min.thickness of 2.4 mils
  • 3-phase induction motors with thermal protector
  • Voltage: All common voltages available. Please specify.
  • Motor winding insulation Class H
  • Dynamically balanced rotor
  • Two oil plugs each fitted with a magnet to filter the oil
  • Yellow painted mounting brackets (AL & ALO) included with pulley
  • Oil change recommended every 50,000 operational hours for synthetic oil (or 20,000 operational hours for mineral oil.)
  • Minimum RL.
  • Maximum RL – Please inquire
  • Non standard RL’s available
  • To be used in horizontal positions ±5 degree only
  • External break optional


  • Completely sealed, compact units save precious space
  • Operates at an average mechanical efficiency of 95%, saving money in energy usage
  • VFD Compatible to provide belt speed flexibility
  • Simple mounting in challenging areas such as tail drives, head drives and dual drives
  • Low maintenance – oil change every 30,000 operating hours on synthetic lubricating oil


  • Broad product line including 9 diameters (138mmØ to 1000mmØ) and power ranging from .33Hp to 330Hp
  • Virtually any face width is available
  • External options include surface finishes (stainless, rubber lagging, ceramic lagging) and sealing systems (standard labyrinth seals, regreasable)
  • Internal options such as mechanical backstops, DC brakes, stator heaters and more