Steam Turbine Turning Gear
Low-speed motor-driven gear system rotating turbine rotor during cooldown and startup to prevent rotor sag. Pinion and bull gear assembly, HTS 8406.90.45.80 other parts. Prevents thermal bowing in large utility turbines.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If speed change gears only
Pure gear boxes classified under transmission components.
If general industrial machinery
Auxiliary turning equipment as parts of unspecified machines.
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Import Tips & Compliance
• Prove integration with barring system via controls
• Gearing alone goes to 8483.40
• Motor separate from gear classification
Related Products under HTS 8406.90.45.80
Steam Turbine Rotor Assembly
A precision-engineered rotor assembly designed for high-speed rotation within steam turbines to convert thermal energy into mechanical power. Classified under HTS 8406.90.45.80 as a part of steam turbines, specifically under 'other' categories for non-leak-proof components. It features balanced blades and shaft for efficient energy transfer in power generation applications.
Steam Turbine Blade Set
A set of forged or cast blades optimized for steam flow in axial or radial steam turbines, typically made from nickel-based superalloys. Falls under HTS 8406.90.45.80 as 'other' parts of steam turbines, excluding diaphragms and leak-proof parts. Essential for energy extraction stages in industrial and utility turbines.
Steam Turbine Casing Section
Segmented high-pressure casing section forged from alloy steel to contain steam flow and support internal components in steam turbines. Under HTS 8406.90.45.80 as other parts, distinct from complete turbines or specified sub-parts. Critical for maintaining pressure integrity in power plant operations.
Steam Turbine Nozzle Ring
Annular assembly of stationary nozzles directing high-velocity steam onto turbine blades for impulse extraction. Made from heat-resistant castings, under HTS 8406.90.45.80 as other steam turbine parts. Key component in high-pressure and intermediate-pressure turbine stages.
Steam Turbine Exhaust Hood
Large fabricated structure collecting low-pressure exhaust steam from final turbine stages, directing to condenser. Heavy steel plate construction with insulation mounts, under HTS 8406.90.45.80 other parts. Essential for condensing cycle efficiency in power plants.
Steam Turbine Journal Bearing
Hydrodynamic tilting pad journal bearing supporting turbine rotor with forced lubrication system for high-load capacity. Specialized babbitt-lined pads, HTS 8406.90.45.80 as other steam turbine parts. Critical for rotor stability at supercritical speeds.