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Ground gear was first made with the advent of trawling. Throughout the
history of trawling, various types of ground gears have been developed,
gradually extending the range of trawlable bottoms. Until 1985, the
predominant type of ground gear mounted on bottom trawls consisted of
rolling bobbins, threaded on a chain that ran through holes in their
centers. In the mid 80s, Rockhopper ground gear was developed and
adopted by a number of major trawl fisheries, and nowadays this type of
gear is virtually exclusively used by fisheries all over the world.Ground gear teeth are crowned with the ideal amount of tip and root relief to ensure quiet operation.They comply with grade one quality to take up peripheral velocity of 1.5 meters per second.
Advantages of Ground Gears
Ground gears have the following advantages:
- They are known for their efficiency.
- They are capable to carry heavy loads.
- They offer correction of profile.
- They have longer life.
- The ground gears assure high transmission accuracy.