Cast Steel Girth Gear (Ring Gear)

Large girth gear processing capability

1. Diameter can be up to 15m, which processing capability could cover 90% demand for ball mill and rotary kiln girth gears in global.
2. Width can up to 2m that could meet the heavy duty load conditions, no matter in cement or mining industry.
3. Strictly implement DIN 3962, Class 6 is better than the industry’s conventional Class 10.
4. Spur girth gear/helical girth gear and double helical processes.
5. Segmented and integral girth gear help customer to solve transportation/installation problems.
6. Girth gears hardness can be up to 320-360BHN.
7. Pinions hardness can be up to 57-62HRC.

Teeth Grinding

1. Achieve DIN 3962, Class 4.
2. With the diameter from 1000mm to 8000mm.

The girth gears accuracy inspection report serves as the core document for both final quality assurance and in-process online monitoring. Utilizing an in-board testing head, the system automatically acquires measurement data and generates standardized inspection graphs to comprehensively evaluate the following key precision parameters and their deviations:
1. Tooth Profile — Conformance of the actual tooth flank to the theoretical involute
2. Lead — Helix deviation along the face width direction
3. Pitch — Individual pitch error and cumulative pitch deviation
4. Run Out — Radial eccentricity deviation of the gear ring relative to its rotational axis
5. Span — Deviation of the measured base tangent length from its theoretical value

Girth Gears for Ball Mills

Ball mill girth gears transfer driving torque through the pinion to rotate the mill shell during grinding. Tenfaye manufactures custom cast steel ball mill girth gears according to customer drawings and technical requirements.

Girth Gears for Rotary Kilns

Rotary kiln girth gears drive kiln rotation under heavy loads and continuous operating conditions. Tenfaye supplies custom cast steel girth gears for rotary kilns, including large-diameter and segmented designs.