When the ship with multi shafting isnt travel at full speed,usually,a part of engine will be stopped.The ship shafting and bent axle of engine will be rotated by un-worked propellers,at this time ,lubricating system has been stopped working,such case will insrease abrasion of parts.

When at low speed,or pulled by other ships clutch and main endine are seprated,long time idling of clutch will increase the parts abrasion.While during the repair and inspection etc.,the ednine is stopped,but the shafting is still operating because of flow.

Int the above-mentioned the ship shafting rotate should be stopped to prevent parts abrasion for such purpose facts,the brakes can be installed to prolong the life of parts.

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