Machine-tools; for honing or lapping

HS v2017 Code: 846040

About machine-tools; for honing or lapping

hs code 846040 covers a range of machine-tools used for the honing or lapping of metal and other materials. These specialized machines play a crucial role in the manufacturing industry, enabling the precise finishing and polishing of components to exacting tolerances. The ability to hone and lap surfaces is essential for the production of high-quality parts used in a variety of applications, from automotive and aerospace to medical equipment and consumer electronics.

Production process

The main production techniques for machine-tools used for honing or lapping involve the use of abrasive materials and precisely controlled movements to remove small amounts of material from the workpiece surface. This process is typically carried out using a rotating spindle or reciprocating motion, with the workpiece held in place. The abrasive materials, such as diamond or silicon carbide, are used to gradually refine the surface finish, removing any irregularities or imperfections.

Production inputs

The key inputs required for the production of machine-tools for honing or lapping include high-quality metals, such as steel and aluminum, as well as specialized abrasive materials. Additionally, these machines require precision engineering components, such as bearings, gears, and control systems, to ensure accurate and reliable operation. The manufacturing process also relies on advanced computer-aided design (CAD) and computer-aided manufacturing (CAM) software to design and program the machine-tools.

Production outputs

The primary output of hs code 846040 is the machine-tools themselves, which are then used in various manufacturing processes to refine and finish a wide range of products. The honed or lapped surfaces produced by these machines are often found in 848310 (Transmission shafts (including camshafts and crankshafts) and cranks), 848320 Bearing housings, incorporating ball or roller bearings, and 848340 Gears and gearing; ball or roller screws; gear boxes and other speed changers, including torque converters, among other industries.

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 page shows a legacy version of code 846040 ( HS v2017).

Newer versions
Older versions

Family tree for machine-tools; for honing or lapping

    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/v2017/846040'>846040: Machine-tools; for honing or lapping</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/v2017/846022'>846022: Machine-tools; grinding machines (excluding flat-surface), centreless, numerically controlled</a>"]
B --> G["<a href='/classifications/hs/v2017/846023'>846023: Machine-tools; cylindrical grinding machines (excluding flat-surface and centreless), numerically controlled</a>"]
B --> H["<a href='/classifications/hs/v2017/846024'>846024: Machine-tools; grinding machines (excluding flat-surface, cylindrical and centreless), numerically controlled</a>"]
B --> I["<a href='/classifications/hs/v2017/846029'>846029: Machine-tools; grinding machines (excluding flat-surface), other than numerically controlled</a>"]
B --> J["<a href='/classifications/hs/v2017/846031'>846031: Machine-tools; sharpening (tool or cutter grinding) machines, numerically controlled</a>"]
B --> K["<a href='/classifications/hs/v2017/846039'>846039: Machine-tools; sharpening (tool or cutter grinding) machines, other than numerically controlled</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

    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