Machine-tools; for honing or lapping

HS v2022 Code: 846040

About machine-tools; for honing or lapping

HS code 846040 covers a specialized category of machine tools used for honing and lapping operations. These precision finishing processes are critical in the manufacturing of high-quality components across a wide range of industries, including automotive, aerospace, and precision engineering. The machines described by this code play a vital role in ensuring the dimensional accuracy and surface finish of parts, contributing to the overall quality and performance of the final products.

Production process

Honing and lapping are two distinct yet complementary finishing techniques. Honing involves the use of abrasive stones or tools to remove a controlled amount of material from the workpiece, resulting in a highly polished and uniform surface. Lapping, on the other hand, utilizes a lapping plate and a lapping compound to achieve an even finer surface finish, often used for the final stages of component production.

Production inputs

The primary inputs for the machine tools described by HS code 846040 include the machine itself, which is typically composed of a sturdy frame, a spindle or rotational mechanism, and a variety of specialized attachments and tooling. Additionally, these machines require a reliable power source, as well as a steady supply of abrasive materials, such as honing stones or lapping compounds, to facilitate the finishing process. The workpieces themselves, which can range from automotive parts to precision instruments, are also a key input for these machine tools.

Production outputs

The primary output of the machine tools covered by HS code 846040 is the finished, high-quality components that have undergone honing or lapping. These components may be used in a wide range of industries, including 870000 Motor vehicles, parts and accessories, 880000 Aircraft, spacecraft, and parts thereof, and 901000 Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof. The precise and consistent surface finishes achieved through these finishing processes are essential for the proper functioning and performance of the final products.

Revisions to 846040

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 846040. The most recent 1 version of this code (846040) is in the HS v2022 system (this version):

This page shows the most recent version of code 846040.

Family tree for machine-tools; for honing or lapping

    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/v2022/846040'>846040: Machine-tools; for honing or lapping</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/v2022/846022'>846022: Machine-tools; grinding machines (excluding flat-surface), centreless, numerically controlled</a>"]
B --> G["<a href='/classifications/hs/v2022/846023'>846023: Machine-tools; cylindrical grinding machines (excluding flat-surface and centreless), numerically controlled</a>"]
B --> H["<a href='/classifications/hs/v2022/846024'>846024: Machine-tools; grinding machines (excluding flat-surface, cylindrical and centreless), numerically controlled</a>"]
B --> I["<a href='/classifications/hs/v2022/846029'>846029: Machine-tools; grinding machines (excluding flat-surface), other than numerically controlled</a>"]
B --> J["<a href='/classifications/hs/v2022/846031'>846031: Machine-tools; sharpening (tool or cutter grinding) machines, numerically controlled</a>"]
B --> K["<a href='/classifications/hs/v2022/846039'>846039: Machine-tools; sharpening (tool or cutter grinding) machines, other than numerically controlled</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

    classDef level1 color:#000,fill:#a8f9ff,stroke:#333,stroke-width:2px
    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