Cast Iron CMM Frame
Heavy-duty cast iron structural frame providing the rigid skeleton for bridge-style CMMs of 9031.49.40. Designed with kinematic mounts for probe alignment and vibration damping. Falls under 9031.90.45.00 as an essential frame for coordinate measuring precision.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If basic castings without precision machining
Unmachined cast iron classified by material under Chapter 73, not instrument parts.
If for non-optical CMM variants
Frames for other measuring machines (not 9031.49.40 optical CMMs) go to different subheading.
If marketed for industrial robots
Similar frames for robotic arms classify as unlisted machines, not measuring instruments.
Not sure which classification is right?
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Import Tips & Compliance
• Provide engineering drawings showing CMM-specific mounting patterns to prove dedicated use
• Ensure material cert for cast iron grade (e.g
• Meehanite) to support classification
• Avoid bundling with probes/accessories to prevent set classification under 9031.49.40
Related Products under HTS 9031.90.45.00
Granite Base for CMM
Precision-ground granite surface plate used as the stable base for coordinate-measuring machines (CMMs) under 9031.49.40. Its low thermal expansion and high rigidity ensure accurate 3D measurements by minimizing vibration and distortion. Classified under 9031.90.45.00 as a dedicated base component for these optical measuring instruments.
Aluminum CMM Portal Frame
Lightweight aluminum gantry frame for high-speed gantry-style CMMs per 9031.49.40. Features precision-machined guideways and thermal compensation slots. Classified in 9031.90.45.00 for its role in supporting optical coordinate measurement.
CMM Granite Table with T-Slots
Granite measuring table with integrated T-slot fixturing system for CMMs of subheading 9031.49.40. Provides reference datum surface and workpiece clamping. 9031.90.45.00 classification due to coordinate-measuring machine specificity.
Precision Steel CMM Base Frame
Epoxy-granite composite steel frame base for horizontal arm CMMs (9031.49.40). Optimized stress-relieved construction prevents measurement drift. Dedicated base component under 9031.90.45.00.
CMM Bridge Structure Frame
Aluminum bridge beam frame for cantilever CMM designs under 9031.49.40. Precision-machined for linear guide integration and minimal deflection. Classifies as frame under 9031.90.45.00 per chapter part rules.
Vibrations-Isolated CMM Base
Granite base with integrated pneumatic vibration isolation mounts for 9031.49.40 CMMs. Provides sub-micron stability for high-precision coordinate measurement. 9031.90.45.00 as coordinate-measuring machine base.