Hoffmann Balancing Machine Reference Disc Set
Calibrated reference discs and calibration weights for Hoffmann vertical balancing machines used for mechanical parts like electric motor armatures. Essential for machine calibration to ensure measurement accuracy. Classified in HTS 9031.90.91.30 as accessories dedicated to balancing machines.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If used for general oscilloscopes or vibration analyzers
Accessories for other measuring instruments classify separately.
If precision weights for scales/balances
Chapter 84 note excludes weights dedicated to Chapter 90 machines.
If generic steel discs/weights not tied to specific machines
Base metal articles classify by material when not Chapter 90 parts.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Ship with NIST-traceable calibration certificates for customs verification
• Specify mass tolerances in documentation to prove measuring/checking function
Related Products under HTS 9031.90.91.30
GE Power Bently Nevada Balancing Probe Assembly
Proximity probe assembly from Bently Nevada for GE gas turbine balancing machines, measuring rotor displacement during balancing operations on mechanical parts. Includes cabling and mounting fixtures specific to the machine frame. HTS 9031.90.91.30 applies as parts principally used with mechanical balancing apparatus.
P&B Engineering Balancer Spindle Cartridge
Precision spindle cartridge assembly for P&B high-speed balancing machines used on aerospace mechanical parts like turbine blades. Features angular position encoders for phase measurement during balancing. HTS 9031.90.91.30 classification for dedicated balancing machine parts.
Sperry Rail Service Balancer Encoder Ring
Incremental encoder ring for Sperry Rail wheelset balancing machines used on locomotive mechanical parts. Provides precise angular reference for unbalance phase measurement. HTS 9031.90.91.30 as encoder accessory principally for balancing machines.
American Hofmann Field Balancing Data Acquisition Module
Compact data acquisition module for American Hofmann portable field balancing kits used on in-situ mechanical parts like ship propellers. Processes vibration signals for on-site correction. HTS 9031.90.91.30 for balancing machine electronics.
Schenck Balancing Machine Workhead Assembly
This workhead assembly is a core component of Schenck balancing machines used for precision measurement and correction of unbalance in rotating mechanical parts like rotors and flywheels. It holds the part securely during high-speed rotation while sensors detect vibration imbalances. Classified under HTS 9031.90.91.30 as a dedicated part of balancing machines per Chapter 90 note 2(b).
Macro Engineering Balancer Laser Alignment Tool
Laser alignment tool mount and optics assembly for Macro Engineering turbocharger balancing machines, ensuring precise mechanical part centering before measurement. Provides visible alignment reference. Classifies HTS 9031.90.91.30 as dedicated accessory.