Girth gear manufacturing procedure.its advantages and disadvantages compared to other gears

Girth gears are large ring gears which are normally fitted to the outside of mills or kilns to provide the primary rotational drive. Used on a number of mining and process applications but are well known in heavy mineral processing such as copper, silver, gold, platinum and iron ore.
Girth Gears
Girth Gears
David Brown girth gears are applied in the mining, cement, minerals industries used in various types of horizontal mills, rotary dryers, rotary kilns and other gear ring applications in heavy processing.
Girth gears are large ring gears which are normally fitted to the outside of mills or kilns to provide the primary rotational drive. Used on a number of mining and process applications but are well known in heavy mineral processing such as copper, silver, gold, platinum and iron ore.
David Brown can supply as part of a full mill drive system allowing optimisation. Mill drive gearboxes and their ratios are selected to compliment the girth gear design and reduce the cost of the entire system. Selecting the right girth gear, brings together the gear manufacturer, the system designer and the end user. David Brown’s high integrity girth gears are used to drive horizontal grinding mills that are designed for ultimate strength and reliability in service.
Girth gears are designed and manufactured with capabilities up to 10,000kW per pinion. Globally David Brown can design, manufacture and supply girth gears up to 14 metres in diameter and up to 105,000kg in weight, made to the highest accuracy and quality. All facilities can supply cast steel and SG iron, fabricated/forged steel gears.
Girth Gears Key Features
Girth gears can be manufactured in 2,3,4,5,6 or 8 or more segments and for both T and Y section gears
Can be manufactured up to 50 module
Designed and manufactured up to 14m in diameter and weight in excess of 105,000kg
High integrity girth gears designed and manufactured to AGMA and other international standards
Can be manufactured from either cast steel, ductile iron or forged/fabricated steel, hardness up to 320 BHN
Provide reliable service and maintenance programs for girth gears which include full overturning capabilities