Balance Staff Jewels Pair
Matched pair of domed synthetic sapphire jewels for watch balance staff pivots, featuring concave polishing for minimal friction. Critical for rate accuracy in mechanical timepieces. Falls under HTS 9114.90.10.00 as these are the most precisely manufactured watch jewels.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If pre-installed in complete balance assemblies
Jewels permanently assembled into balance cocks become timepieces of Chapter 91.
If industrial grinding applications
Same synthetic materials used as abrasives classify under Chapter 68 when not watch-specific.
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Import Tips & Compliance
• Measure and document jewel hole radius to ±0.001mm tolerance for classification proof
• Include material hardness certification (Mohs 9) distinguishing from plastic substitutes
• Package individually in jewel paper to prevent pivot hole deformation during shipping
Related Products under HTS 9114.90.10.00
Synthetic Ruby Watch Jewels
Precision-engineered synthetic ruby jewels used as bearings in watch movements to reduce friction on pivots. These fall under HTS 9114.90.10.00 as they are specifically classified as 'jewels' for clocks or watches, distinct from general parts. Typically supplied in sets of 7, 15, or 17 pieces matching standard movement configurations.
17-Jewel ETA 2824 Bearing Set
Complete set of 17 synthetic sapphire jewels calibrated for ETA 2824 automatic watch movements. Each jewel features precisely drilled pivot holes and specific oil cups matching movement specifications. Classified under HTS 9114.90.10.00 as replacement jewels for professional watch servicing.
Pallet Stone Jewels for Chronograph Movements
Specialized impulse pallet jewels for chronograph watch escapements, typically made from synthetic ruby with hardened steel inserts. These critical jewels bear high-impact forces during stopwatch functions. HTS 9114.90.10.00 classification applies to all functional watch jewels regardless of position.
Bulk Synthetic Sapphire Watch Jewels (1000 pieces)
Factory-packed tray of 1000 identical synthetic sapphire jewels for high-volume watch assembly lines. Each jewel precision-ground to standard 1.20mm pivot hole diameter. HTS 9114.90.10.00 applies to bulk shipments destined for watch manufacturing.
Vintage Omega Speedmaster Jewels Kit
Restoration kit containing exact-specification synthetic ruby jewels for 1960s Omega Speedmaster movements. Includes numbered positions for proper caliber 321 installation. Classified as watch jewels under HTS 9114.90.10.00 despite vintage application.