Tunnel Boring Machine Disc Cutter
Large diameter disc cutter ring with tungsten carbide edges for tunnel boring machines (TBMs) under heading 8430. Used to gouge and crush rock faces in underground tunneling projects. Classified in 8431.49.90.34 for parts of tunneling machinery.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for boring/sinking machinery of 8430
Some TBM parts fall under specific subheadings for drilling/boring if not cutter-specific.
If used on handheld saws
Circular saw blades of base metal classify in Chapter 82 when not machine-dedicated.
If sold as complete cutterhead assembly
Assembled cutterheads with multiple discs become finished tunneling machinery, not parts.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Submit detailed CAD drawings showing sole use with TBM cutterheads; declare exact diameter and rock hardness ratings; check for quotas on carbide content
Related Products under HTS 8431.49.90.34
Micro-TBM Cutter Insert
Miniature carbide insert for small-diameter micro tunnel boring machines used in utility tunneling under heading 8430. Designed for soft ground and rock up to 48" diameter. Part of 8431.49.90.34.
Rippershark Cutter Chain Link
Specialized link in cutter chain system for Rippershark-style rock cutting attachments on tunneling equipment of heading 8430. Includes pick retention features. Classified under 8431.49.90.34.
Hard Rock TBM Center Row Cutter
V-shaped twin-disc cutter for center row of hard rock tunnel boring machine cutterheads under heading 8430. Balances cutting loads in abrasive formations. Part of 8431.49.90.34 tunneling machinery.
Longwall Miner Roof Support Pick
Heavy pick for temporary roof support roadheaders in longwall coal mining systems of heading 8430. Clears strata above shearer path. Classified in 8431.49.90.34 as coal/rock cutter part.
Coal Plough Cutting Edge
Replaceable hardened steel edge for coal ploughs used in longwall mining systems under heading 8430. Profiles coal face while conveyor advances. Covered by 8431.49.90.34 as coal cutter part.
Tunneling Machine Cutter Bearing
Sealed heavy-duty roller bearing for mounting disc cutters on tunnel boring machine cutterheads under heading 8430. Rated for extreme shock loads and contamination. Part of 8431.49.90.34 tunneling parts.