Invertible Gear Units

Description

The Invertible Gear Unit in conjunction with the optional Rigid Flange Coupling and motor lantern makes it highly suitable for conveyor applications.

The Invertible Gear Unit alleviates the past requirement of separate drives for left and right hand orientation of gearbox drives on multiple drive conveyors. The innovative gearbox can be inverted, i.e. turned 180° for either handing. The resultant reduction in the number of spare gearboxes to be held in stock for possible breakdowns leads to significant cost and space savings.

Basic Components

Helical and Spiral Bevel Gears
Designed and rated:

  • based on AGMA, ISO and long term field experience;
  • For maximum load capacity, minimum losses and quiet operation.

All geared components are manufactured from alloy steel, gas carburized, hardened and ground. The same applies to all intermediate and high speed shafts which are generally designed as pinion shafts.

Low Speed Shafts

The standard length of the solid shafts is shown in the catalogue. The length and keyway can be changed to suit the application.

Bearings

Heavy duty roller bearings of tapered, cylindrical or spherical roller type. The bearing life is calculated in compliance with AGMA, ISO and renowned bearing manufacturers.

Housings, Bearing Housings and Covers

Made from grey pearlitic cast iron. Designed to ensure strength and rigidity and machined to stringent specifications.

Lubrication

As a rule mineral oils are used. Lubricants should always contain adequate EP-additives (refer to Service Manual). Splash lubrication is standard. The gear unit housing acts as a large oil sump.

Sealing

Static: In general sealing compound is used.

Rotary: High speed shaft: dust lip oil seal.
Low speed shaft: dust lip oil seal.
Grease purged labyrinth seals are optional.

Cooling

Heat generated in the gear unit while running can be dissipated by:

  • Natural cooling through the housing
  • Fan cooling

One standard fan may be mounted on the high speed shaft. Free air entry at the fan suction side should be guaranteed.

Accessories

  • Motor Lantern: To suit IEC flange motors and to accommodate both flexible and hydrodynamic (fluid) couplings.
  • Base-plates
  • Torque Arm mountings
  • Rigid Flange Couplings
  • Backstop: sprags; centrifugally lift-off type lubricated by gear unit oil; mounted for easy service access.

Shipping Conditions

Inspection prior to shipment

  • Conformance check to the acknowledgement of order
  • A 12-hour no-load test
  • Load test up to 160kW, optional

Protection

  • Painting:
    a. Outer Side Housing:
    • Gear units are as a standard provided with a quick dry enamel paint.
    • Improved surface protection : good corrosion protection for many years in a non-aggressive atmosphere.
    • Dry film thickness : average 100 µm (primer included).
    • Excellent base for all kinds of special paints. These can also be applied on site after a longer period of time.
    • Suitable to apply humidity resistant paint as an option.
    b. Inner Side Housing : oil resistant paint
    c. Inner Components : sprayed with rust preventive oil
  • Shaft Extensions:
    Greased and protected with waxed waterproof paper or tectyle.

Lubricants

  • Units are shipped without oil
  • Grease lubrication points are factory filled.

For information relating to storage, handling, installation, starting-up and maintenance, refer to the Service Manual which is supplied with each unit.

Selection

The Invertible Gear Unit is available in a horizontal right angle configuration in either two or three stage configuration.