| HS Code | Official Doc | Tariff Rate | Origin | Destination | Effective Date |
|---|---|---|---|---|---|
| 8460120040 | Doc | 59.4% | CN | US | 2025-05-12 |
| 8460904060 | Doc | 59.4% | CN | US | 2025-05-12 |
| 8487900080 | Doc | 83.9% | CN | US | 2025-05-12 |
| 8487900040 | Doc | 58.9% | CN | US | 2025-05-12 |
| 6909112000 | Doc | 55.0% | CN | US | 2025-05-12 |
| 6909120000 | Doc | 59.0% | CN | US | 2025-05-12 |
| 6914908000 | Doc | 60.6% | CN | US | 2025-05-12 |
| 6914108000 | Doc | 64.0% | CN | US | 2025-05-12 |
Grinding Tables
Grinding tables, also known as surface grinders, are machine tools used to achieve high precision in shaping materials through abrasive grinding. They are employed to remove small amounts of material, resulting in exceptionally flat surfaces, precise dimensions, and tight tolerances.
Material Compatibility:
Grinding tables are versatile and can process a wide range of materials, including:
- Metals: Steel (various alloys), cast iron, aluminum, titanium, and other ferrous and non-ferrous alloys.
- Ceramics: Alumina, silicon carbide, and other technical ceramics.
- Composites: Certain composite materials with abrasive-resistant properties.
- Hard Materials: Tool steels, carbides, and hardened components.
Purpose and Function:
The primary purpose of a grinding table is to:
- Flatten Surfaces: Achieve a perfectly level and smooth surface finish.
- Precise Dimensioning: Obtain accurate sizes and shapes with minimal deviation.
- Tight Tolerances: Meet demanding specifications for component fit and function.
- Material Removal: Remove small amounts of material to refine surfaces and achieve desired profiles.
- Deburring and Edge Finishing: Eliminate sharp edges and burrs for improved safety and functionality.
Usage Scenarios:
Grinding tables are crucial in industries requiring high-precision components, including:
- Manufacturing: Production of molds, dies, and precision parts.
- Aerospace: Machining of turbine blades, engine components, and structural parts.
- Automotive: Grinding of crankshafts, camshafts, and other critical engine components.
- Tool and Die Making: Creation of precise tools, dies, and molds for various manufacturing processes.
- Medical: Production of surgical instruments, implants, and precision medical devices.
- Research and Development: Prototyping and fabrication of specialized components.
Common Types:
Several types of grinding tables cater to specific applications:
- Flat Bed Grinders: Most common type, used for grinding flat surfaces.
- Cylindrical Grinders: Used for grinding cylindrical surfaces, often for shafts and bearings.
- Surface Grinders (Reciprocating Table): Table moves back and forth under the grinding wheel.
- Rotary Table Grinders: Table rotates, allowing for grinding of complex shapes.
- Vertical Spindle Grinders: Wheel rotates vertically, suitable for grinding large or heavy parts.
- CNC Grinding Tables: Computer-controlled grinders offering automated operation and high precision.
- Internal Grinders: Used for grinding internal diameters and bores.
- Form Grinders: Used for grinding complex shapes and contours.
Grinding tables are machine tools used for deburring, sharpening, grinding, honing, lapping, polishing, or otherwise finishing metal or cermets by means of grinding stones, abrasives, or polishing products. They are distinct from gear cutting, gear grinding, or gear finishing machines. The following HS codes are relevant based on the provided information:
- 8460120040: This HS code covers machine tools for deburring, sharpening, grinding, honing, lapping, polishing, or otherwise finishing metal or cermets, specifically flat-surface grinding machines that are numerically controlled or used or rebuilt. Chapter 84 relates to nuclear reactors, boilers, machinery and mechanical appliances; parts thereof. Heading 8460 covers machine tools for working metal, other than those of heading 8461. The subheading 8460120040 further specifies flat-surface grinding machines.
- 8460904060: This HS code also covers machine tools for deburring, sharpening, grinding, honing, lapping, polishing, or otherwise finishing metal or cermets, but refers to other machine tools (not flat-surface) that are numerically controlled. Chapter 84 and Heading 8460 apply as above.
- 8487900080: This HS code covers machinery parts, not containing electrical connectors, insulators, coils, contacts, or other electrical features, and not specified elsewhere in Chapter 84. This could apply to components of the grinding table. Chapter 84 covers nuclear reactors, boilers, machinery and mechanical appliances; parts thereof. Heading 8487 covers parts of machinery, not containing electrical connectors, insulators, coils, contacts or other electrical features.
- 8487900040: This HS code covers machinery parts, specifically oil seals (other than those of chapter 40), which may be used in the grinding table. Chapter 84 and Heading 8487 apply as above.
Regarding HS code 8487900080 and 8487900040, please note the need to verify the material composition, as steel and aluminum products have a 25% additional tariff.