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

HS v2022 Code: 846022

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

HS code 846022 covers numerically controlled centreless grinding machines, a specialized type of machine tool used for precision grinding operations. These machines play a crucial role in the manufacturing of a wide range of components and parts across various industries, including automotive, aerospace, and general engineering. Their ability to produce high-quality, tight-tolerance parts makes them an essential piece of equipment in many modern manufacturing processes.

Production process

Centreless grinding machines operate by suspending the workpiece between a grinding wheel and a regulating wheel, without the use of a workholding fixture. This allows for continuous, automated grinding of cylindrical parts. The workpiece is fed through the machine, and the grinding wheel removes material to achieve the desired size and finish. Numerical control (NC) systems provide precise control over the grinding process, enabling consistent and repeatable results.

Production inputs

The primary inputs for the production of centreless grinding machines include high-quality steel for the machine components, specialized grinding wheels, and advanced control systems and electronics. Additionally, these machines require skilled operators and technicians to set up, program, and maintain the equipment for optimal performance.

Production outputs

Centreless grinding machines produce a wide range of precision-ground components and parts, such as shafts, pins, rollers, and other cylindrical workpieces. The output of this industry is often consumed by manufacturers in the 846021 Machine-tools; grinding machines, for working metal and 848050 (Machining centres, unit construction machines (single station) and multi-station transfer machines, for working metal) industries, as well as other sectors that require high-precision, tight-tolerance parts.

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 version):

This page shows the most recent version of code 846022.

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

    graph LR
    A["<a href='/classifications/hs/v2022/84'>84: Machinery and mechanical appliances, boilers, nuclear reactors; parts thereof</a>"]
A --> B["<a href='/classifications/hs/v2022/8460'>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/v2022/846022'>846022: Machine-tools; grinding machines (excluding flat-surface), centreless, numerically controlled</a>"]

    B --> D["<a href='/classifications/hs/v2022/846012'>846012: Machine-tools; flat-surface grinding machines, numerically controlled</a>"]
B --> E["<a href='/classifications/hs/v2022/846019'>846019: Machine-tools; flat-surface grinding machines, other than numerically controlled</a>"]
B --> F["<a href='/classifications/hs/v2022/846023'>846023: Machine-tools; cylindrical grinding machines (excluding flat-surface and centreless), numerically controlled</a>"]
B --> G["<a href='/classifications/hs/v2022/846024'>846024: Machine-tools; grinding machines (excluding flat-surface, cylindrical and centreless), numerically controlled</a>"]
B --> H["<a href='/classifications/hs/v2022/846029'>846029: Machine-tools; grinding machines (excluding flat-surface), other than numerically controlled</a>"]
B --> I["<a href='/classifications/hs/v2022/846031'>846031: Machine-tools; sharpening (tool or cutter grinding) machines, numerically controlled</a>"]
B --> J["<a href='/classifications/hs/v2022/846039'>846039: Machine-tools; sharpening (tool or cutter grinding) machines, other than numerically controlled</a>"]
B --> K["<a href='/classifications/hs/v2022/846040'>846040: Machine-tools; for honing or lapping</a>"]
B --> L["<a href='/classifications/hs/v2022/846090'>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