Machine-tools; grinding machines (excluding flat-surface), centreless, numerically controlled

HS v2017 Code: 846022

About machine-tools; grinding machines (excluding flat-surface), centreless, numerically controlled

hs code 846022 covers a specialized category of machine tools known as centreless grinding machines. These numerically controlled machines play a crucial role in the manufacturing industry, enabling the precision grinding of cylindrical workpieces without the need for a workholding device. Centreless grinding is a highly efficient process that is widely used across various sectors, including automotive, aerospace, and general engineering, contributing significantly to the overall productivity and quality of industrial output.

Production process

Centreless grinding machines operate by suspending the workpiece between a grinding wheel and a regulating wheel. The grinding wheel removes material from the workpiece, while the regulating wheel controls the workpiece's rotation and feed rate. This process allows for consistent and accurate grinding without the need for workholding fixtures, making it particularly suitable for high-volume production of cylindrical parts. Numerically controlled centreless grinders utilize advanced computer numerical control (CNC) systems to automate the grinding process, ensuring precise and repeatable results.

Production inputs

The key inputs required for the production of centreless grinding machines (hs code 846022) include high-quality abrasive materials for the grinding wheel, precision-engineered components such as bearings and spindles, and advanced control systems and software. Additionally, these machines require a reliable power source and a well-designed work environment to ensure optimal performance and safety. The availability of skilled technicians and engineers is also crucial for the proper installation, maintenance, and operation of these specialized machine tools.

Production outputs

Centreless grinding machines (hs code 846022) are primarily used to produce a wide range of cylindrical components, including shafts, pins, rollers, and other precision parts. These parts are then consumed by various industries, such as 870000 Motor vehicles, trailers and semi-trailers, 840000 Machinery and mechanical appliances; parts thereof, and 860000 (Railway or tramway locomotives, rolling-stock and parts thereof; railway or tramway track fixtures and fittings and parts thereof; mechanical (including electro-mechanical) traffic signalling equipment of all kinds), among others. The high-quality and consistent output of centreless grinding machines make them an essential tool in the manufacturing of a diverse range of products across multiple sectors.

Revisions to 846022

Classification codes are adjusted frequently. The code may have been revised or replaced between system versions. The table below shows the history (newest to oldest) of the code 846022. The most recent 1 version of this code (846022) is in the HS v2022 system:

This page shows a legacy version of code 846022 ( HS v2017).

Older versions

Family tree for machine-tools; grinding machines (excluding flat-surface), centreless, numerically controlled

    graph LR
    A["<a href='/classifications/hs/v2017/84'>84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof</a>"]
A --> B["<a href='/classifications/hs/v2017/8460'>8460: Machine-tools; for deburring, sharpening, grinding, honing, lapping, polishing or otherwise finishing metal, sintered metal carbides or cermets by means of grinding stones, abrasives or polishing products</a>"]
B --> C["<a href='/classifications/hs/v2017/846022'>846022: Machine-tools; grinding machines (excluding flat-surface), centreless, numerically controlled</a>"]

    B --> D["<a href='/classifications/hs/v2017/846012'>846012: Machine-tools; flat-surface grinding machines, numerically controlled</a>"]
B --> E["<a href='/classifications/hs/v2017/846019'>846019: Machine-tools; flat-surface grinding machines, other than numerically controlled</a>"]
B --> F["<a href='/classifications/hs/v2017/846023'>846023: Machine-tools; cylindrical grinding machines (excluding flat-surface and centreless), numerically controlled</a>"]
B --> G["<a href='/classifications/hs/v2017/846024'>846024: Machine-tools; grinding machines (excluding flat-surface, cylindrical and centreless), numerically controlled</a>"]
B --> H["<a href='/classifications/hs/v2017/846029'>846029: Machine-tools; grinding machines (excluding flat-surface), other than numerically controlled</a>"]
B --> I["<a href='/classifications/hs/v2017/846031'>846031: Machine-tools; sharpening (tool or cutter grinding) machines, numerically controlled</a>"]
B --> J["<a href='/classifications/hs/v2017/846039'>846039: Machine-tools; sharpening (tool or cutter grinding) machines, other than numerically controlled</a>"]
B --> K["<a href='/classifications/hs/v2017/846040'>846040: Machine-tools; for honing or lapping</a>"]
B --> L["<a href='/classifications/hs/v2017/846090'>846090: Machine-tools; for deburring, grinding, polishing or otherwise finishing metal, sintered metal carbides or cermets by means of grinding stones, abrasives or polishing products, n.e.c. in heading no. 8460</a>"]

    

    %% Color coordination by level

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    classDef level2 color:#000,fill:#e0a458,stroke:#333,stroke-width:1px
    classDef level3 color:#000,fill:#419d78,stroke:#333,stroke-width:1px
    classDef level4 color:#000,fill:#c04abc,stroke:#333,stroke-width:1px
    classDef level5 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px
    classDef level6 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px
    classDef highlight color:#000,fill:#fff,stroke:#000,stroke-width:5px



  %% Apply classes
  class A level2
class B level4
class C level6
class D level6
class E level6
class F level6
class G level6
class H level6
class I level6
class J level6
class K level6
class L level6

  class C highlight

  %% class A level1
  %% class B,C level2
  %% class D,E,F,G,H,I level2
  %% class J,K,L,M,N,O,P level3
  %% class C highlight