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The axial depression of the midoceanic ridge system.

Related Terms

HOLLOW DRILL

A drill rod or stem having an axial hole for the passage of water or compressed air to remove cuttings from a drill hole. Also known as hollow rod; hollow stem.

FLOATING BEARING

A bearing designed or mounted to permit axial displacement between shaft and housing.

SLIDE BEARING

A bearing used or positioning a slide or for axial alignment of a long rotating shaft.

PIVOT BEARING

An axial load bearing, radial-load-type bearing which supports the end of a shaft or pivot.

BALANCE PISTON

Reaction turbines have axial thrust because pressure on the entering side is greater than pressure on the leaving side of each stage. To counteract this force, steam is admitted to a dummy (balance) piston chamber at the low-pressure end of the rotor. Some designers also use a balance piston on impulse turbines that have a high thrust. Instead of piston, seal strips are also used to duplicate a piston's counter force.

AXIAL

Of or pertaining to an axis

FIXED BEARING

A bearing which positions shaft against axial movement in both directions.

END PLAY

The axial play of the outer ring in a bearing. The measured maximum possible movement parallel to bearing axis of the inner ring in relation to outer ring.

DUPLEX BEARING

A duplex bearing is a bearing with controlled axial location of faces of inner and outer rings which makes this bearing suitable for mounting in various combinations with one or more bearings controlled in the same manner.

HYDRAULIC NUT

A collar temporarily fixed to shaft which incorporates hydraulic annular piston to transmit axial mounting or dismounting force to bearing inner ring.

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