CementKiln Drive & Mechanical
Kiln girth gear (large open gear – ring gear)
Among the largest gears in industry – split into 2 halves for assembly. Tooth profile accuracy (DIN 4 or AGMA 6): critical for gear life. Matched pinion required – normally supplied as set. Weight: 5–50 tonne per segment depending on kiln size.
Specifications
Material
Cast Steel: ASTM A148 Gr80-50 / SAE 0050 A; Some designs: ductile iron GJS-700-2 (smaller kilns)
Grades
GJS-700-2
Material Class
Ductile IronCast Steel
Applicable Standards
ASTM A148 Gr80DIN 4
Common Processes
Resin sand / furan no-bake (very large split ring casting, segments up to 10 tonne each); Q&T heat treat
NDT & Inspection
UT (full volume, E446); MT; gear tooth profile CMM; hardness (face HB 180–260); dimensional (pitch diameter, bore, bolt pattern)
Typical Specs & Notes
Among the largest gears in industry – split into 2 halves for assembly. Tooth profile accuracy (DIN 4 or AGMA 6): critical for gear life. Matched pinion required – normally supplied as set. Weight: 5–50 tonne per segment depending on kiln size.
⚠ Caveats
Tooth profile accuracy (DIN 4 or AGMA 6): critical for gear life.