Reduction Gearboxes

The reduction gearboxes are designed for engines from 150 kW to 8000 kW. The maximum input revolutions are from 3200 rpm on the smallest gearbox to 1000 rpm on the largest gearbox. The reduction ratios are from 2:1 to 15:1. The gearboxes with the largest reduction ratios have 2-sets gearwheels. The gearboxes are manufactured with adaptor for flywheel housing or as free standing. As standard the gearboxes are manufactured with built in servomotor. Power take off can be delivered as single, twin or triple for operation of pumps or alternator. Three main types of gearboxes are manufactured, single input - single output, twin input - single output and U - gearboxes.

Single input - single output

U - Gearboxes

Gearbox type

Max
KW

Max
RPM

G18-G18F-G18K-G18FK

250

3200

G23-G23F-G23K-G23FK

310

2800

G27-G27F-G27K-G27FK

460

2400

G30-G30F-G30K-G30FK

740

2100

G42F-G42FK

1300

2000

G50F-G50FK

2000

1800

G60F-G60FK

3500

1600

G70F-G70FK

5000

1200

G85F-G85FK

8000

1000

F=Free standing K=Power take-off

Gearbox type

Max
KW

Max
RPM

GXU 85F-GXU 85FK

370

2400

GXU 160F-GXU 160FK

550

2100

GXU 420F-GXU 420FK

1000

2000

GXU 500F-GXU 500FK

1500

1800

Twin input - single output

Gearbox type

Max
KW

Max
RPM

2G60/23-2G64

2x290

2400

2G70/27-2G75

2x450

2100

2G70/30-2G90

3x1050

1800

The gearboxes are manufactured with following main components:

  • Cast gearbox housing

  • Hydraulically operated multi-plate clutch

  • Hydraulically built in servo unit for prop. pitch setting

  • Output shaft with flange arr. for prop. shaft coupling

  • Elektrohydraulic clutch valve

  • Input shaft arranged for flexible coupling

  • Gearwheels with hardened and ground helical teeth

  • Spherical roller thrust bearing

  • Oil cooler and oil filter

  • Alarm sensors for oil pressure and gearbox temperature

All parts are made from the most suitable material qualities.
All bearings are roller design which give a low loss of power.

For any further information on this product,
or a quotation for a specific project please contact

Marine Systems (UK) Limited

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marine systems (UK) limited
Marine Systems: Suppliersof quality products to the marine industry for over 40 years.