All About Specification Of Girth Gear

All About Of Girth Gears

Girth gears (ring gears) are large ring gears that are normally fitted to the outside of ball mills or rotary kilns to provide the primary rotational drive, which is required to be operated for a long time, so the quality requirements during the actual production for the big gear ring are very high Girth gears are applied in various types of horizontal mills, rotary dryers, and rotary kilns.

Industrial Girth Gears

We are a prominent producer of high-quality girth gears with diameters up to 7000 mm. Using the specified designs as a guide, our specialists at Aries Industries can also design and produce hefty gears. Our girth gears are frequently used in ball mills, cement plants, steel plants, and power plants. We employ a very efficient hardening technique to create our girth gears, allowing us to accurately construct items that always have a long lifespan.

Aries Industries has earned a reputation for producing some of the highest-quality girth gears that can be applied in a variety of ways over the years. Our hardworking workers can create cutting-edge kiln girth gears and industrial girth gears with unrivaled performance by utilizing cutting-edge technology. With assistance of premium raw materials, our girth gears are accurately created in accordance with “DIN 3962” accuracy class VIII criteria. The most dependable and reputable suppliers in this industry produce the cast rims for the girth gears. To ensure that our products meet the highest international industrial standards, we have a team of quality experts who inspect each and every product as it is being made.

Here are a few of our girth gears’ distinguishing qualities.

  • Excellent design.
  • Dimensional precision.
  • Excellent power.
  • Simple installation.
  • Easy to use.
  • Versatile performance.
  • Significant longevity.
  • Measures that are exact.
  • Perfect for a variety of purposes.
  • Strict quality controls.

Our Range of Products

A wide range of devices, including Rotary Dryers, Rotary Kilns, and Ball Mills, are utilized in conjunction with the extensive array of girth gear items that we design and produce. In addition, we can manufacture our girth gears in accordance with any requirements supplied to us by our clients. Therefore, if you want to tailor girth gears to your particular requirements, you can be sure to get the best items from us here at Aries Industries. We also have a sizable panel of girth gears that are built using conventional dimensions.

Our ability to produce cutting-edge girth gears makes us among of the best in the business. When creating our girth gears, we carefully follow the best industry standards. We also provide our girth gear goods at the most reasonable package prices.



  • Special Heat Treatment Technology

Great Wall Steel Casting adopts special heat treatment technology to optimize structure, improve hardness and enhance impact resistance of girth gear.

  • Long Service Life

Great Wall Steel Casting adopts high strength steel to produce girth gear. Firstly characteristics optimization of rotary kiln is done to guarantee its stability during long time operation, also to prolong its working life.


  • Factory Price Custom & Quick Delivery

Great Wall Steel Casting has strong steel casting production capability, and it can provide girth gear in large quantity with short period.


Girth Gear (Rotary Kiln or Ball Mill) Quality Testing:


Girth gear rim is casted in two halves

Non destructive testing is performed to ensure zero defects

Machining of gear in multiple steps to ensure best finish and accuracy

Final quality inspection to ensure CPG quality.





Item Casting Steel Girth Gear
Pressure angle Customized
Material Alloy steel & Carbon steel
Application rotary kiln, ball mill, rotary dryer,etc.
Packing Seaworthy plywood packaged on stell pallets or as customers’ request
Delivery date Depends on the amount and dimension of products

Girth Gear

Why quality is so important?

Total Girth Gear installation cost survey

Calculation example:

Kiln size ø5.0 x 90 m Production: 4500 tpd

  • Estimated cost of parts: EUR 450.000,- (27%) Girth gear + springs etc.
  • Est. mech. erection costs: EUR 130.000,- (8%) 29% of parts cost
  • Estimated consequential loss : EUR 1.080.000,- (65%) EUR 4500/hour in 10 days
  • Total installation costs: EUR 1.660.000,- (100%) Parts 27% Consequential 65% Mech. 8%


  • The cost of the Girth Gear is only a “piece of the cake” compared with the total substantial installation cost.
  • Long term solution with Great Wall Casting quality is the best solution to ensure a beneficial investment.


How to Install the girth gear(rotary kiln):

The girth gear is placed near to a kiln tyre so that it is accurately aligned with the rotary kiln axis, with minimal wobble. It is normal for the nearby tyre to be fixed in position with thrust rollers, so that as the kiln expands on warming up, the turning girth gear position remains fairly constant, while the nose and tail of the kiln expand outward.




Girth Gers - Processing


Large gears of great wall steel casting in rotary kiln and ball mill of 5000 tpd cement production line provide reliable guarantee for normal operation of cement and rotary kiln. and the ball mill.

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