ZF Of North America Introduces ZF-FPM IRM-350 Marine Gear

ZF of North America recently announced the introduction of the model IRM-350 Reverse/Reduction Marine Transmission which complements the already extensive line of deep ratio, cast iron ZF transmissions for continuous duty applications.

The MPM Division of the ZF Group manufactures and produces this model which is targeted for the commercial fish boat and work boat markets.

A continuous duty rating of up to 409 bhp at 1800 rpm is available depending upon reduction ratio.

The maximum reduction ratio is 6.45:1. Identical ratios and full power capability in either output shaft rotation direction allows the use of identical marine transmissions and standard rotation diesel engines.

Transmissions are normally supplied with a highly elastic torsional coupling. An optional rubber block drive is available where torsional vibration is minimal and of no major significance.

The transmissions are produced with the highest precision possible, and utilize ZF/MPM designed helical gears which are carburized, hardened, and ground. The units employ modulated clutches for smooth and prompt engagement.

Positive lubrication of the clutches, gears, and bearings is assured by the heavy-duty main pump, which utilizes a suction side filter and a discharge side filter.

Clutches and gears are easily inspected by removal of the large inspection cover. Oil changes are more easily accomplished by offering two drain plug locations on either side of center. A heavy-duty bayonet-type dipstick is provided.

The compact size has been achieved through the use of rationalized engineering techniques and Cad-Cam computer-aided design programs.

Accessory groups are available with the IRM 350.

For more information and free literature from ZF of North America, Circle 21 on Reader Service Card

Maritime Reporter Magazine, page 42,  Jan 1988 Maine

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Maritime Reporter

First published in 1881 Maritime Reporter is the world's largest audited circulation publication serving the global maritime industry.