



Girth Pinion Assembly For Kiln
The Girth Gear and Pinion Assembly is the primary mechanical drive system of a rotary kiln — the large-diameter ring gear mounted on the kiln shell meshing with the driven pinion to rotate the kiln at the precise, controlled speed required for consistent material processing. This assembly operates continuously under enormous torque loads, high temperatures, and dusty, abrasive conditions that rapidly accelerate wear on poorly specified components. Imperial World Trade supplies girth gear and pinion assemblies for cement, lime, and mineral processing rotary kilns, sourced from certified heavy engineering manufacturers.
- Cast & Fabricated Girth Gears: Both cast steel and fabricated segmental girth gear designs available to match existing kiln mounting and tooth profile specifications.
- Hardened Pinion Shaft Assemblies: Alloy steel pinions with surface-hardened tooth profiles for extended wear life under continuous high-torque meshing loads.
- Split Gear Design: Two-piece or multi-segment girth gear designs enabling on-site installation and replacement without kiln shell disassembly.
- Flexible Mounting System: Spring plate or tangential mounting assemblies that accommodate kiln shell thermal expansion and ovality without gear misalignment.
- Gear Lubrication Systems: Spray lubrication units and open gear lubricants specifically formulated for the operating conditions of large open girth gear drives.
- Dimensional Matching: All replacement gears and pinions manufactured to match existing tooth module, pressure angle, and face width specifications exactly.
Imperial World Trade supplies girth gear and pinion assemblies with full material certification, dimensional inspection reports, and tooth profile verification, ensuring drop-in compatibility with your existing kiln drive system without modification or realignment work.









