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Stelex Construction Equipment, manufacturer of the Hercules range of trommels, has standardised on Baldor-Dodge Imperial ISN mounted spherical roller bearings for its new HT182M road-going trommel.

One of the major features of the stone-cleaning and sizing machine is deployment flexibility, due to the design’s incorporation of a low loader trailer.

Aside from deployment flexibility, one of Stelex’s key design parameters for the trommel was ease of on-site maintenance.

The company therefore chose to standardise on Dodge Imperial ISN bearings for all of the machine’s main rotational load-bearing parts.

These bearings use a patented thin-wall push-pull adapter system, which can be either metric or imperial sizes and achieves clearance setting without the use of feeler gauges; the bearing can be installed or uninstalled simply by turning a locknut clockwise or anticlockwise.

Dodge Imperial ISN bearings can be installed and uninstalled in less than 15 minutes.

They can be fitted without specialist tools and are supplied pre-lubricated and fully sealed, making them suitable for on-site maintenance purposes.

Stelex currently uses eight 90mm Dodge Imperial ISN bearings – which are contained in ISN pillow blocks – on the HT182M, but the company is also looking at using the 140mm models on larger trommels in development.

The HT182M road-going trommel is suitable for cleaning and sizing quarried stone, regardless of location.

The machine’s integrated low loader trailer enables it to be driven to the exact point of need on site.

It is capable of handling blasted, ripped or as-dug material and can process up to 500 tonnes/hour.

Typical applications include quarry overburden cleanup and the removal of fines prior to crushing.

The trommel’s main components are a 42-tonne capacity feed hopper equipped with a variable speed reciprocating tray feeder and a 1.8m-diameter x 9.8m-long screening barrel.

The barrel sits on hydraulically driven support rollers – the main drive pump can be powered by an electric motor or a diesel engine – and its rotational speed can be varied to accommodate different material-flow rates.

The complete machine sits on support legs or an under-frame and the desired grade of material is obtained via an extraction hopper placed beneath the appropriate section of the screening barrel.


Baldor Electric Company, a member of the ABB Group, designs, manufactures, and markets the broadest line of industrial energy-efficient electric motors, power transmission products, adjustable speed drives, linear motors, motion control products, gear products, industrial grinders and generators. The Baldor range provides a complete motion solution for machine automation and utilizes our acclaimed MINT motion language.

Range includes:.

* Rotary and linear servo motors.

* Intelligent Servo drives.

* Inverter and vector drives.

* Multi-axis motion controllers: Boxed and board level solutions.

Baldor is the largest motor and mechanical power transmission company in North America and the second largest worldwide.

Baldor-Reliance motor products now range from 15 watts to 11,000 kW and includes:.

* ‘Super-E’ motors that exceed the new IEC 60034-30, IE3 efficiency level.

* NEMA Premium Efficiency rated motors, meeting the new EISA legislation covering motors supplied into the USA.

* Custom motors to meet client specific requirements.

Dodge power transmission products offer a wide variety of engineered mounted bearings including Grip Tight Adapter range and enclosed gear products including the Quantis modular, High Efficiency range. Baldor operates plants in the USA, United Kingdom, China and Canada with products available from our worldwide network

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