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Guilherme Mazui

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What is the Difference Between Jig and Fixture?

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The main difference between jigs and fixtures lies in their functions and applications in the manufacturing process. Here are the key differences between the two:

  • Function: Jigs are designed to guide a cutting tool and are typically used for manual operations like drilling or reaming. Fixtures, on the other hand, are used to secure and align raw materials in a CNC machine, providing support and ensuring the workpiece remains stationary during machining.
  • Purpose: Jigs increase interchangeability, simplify the manufacturing process, and assure higher accuracy and repeatability in mass production. Fixtures, while not guiding the tool on a workpiece like a jig, hold the workpiece in a secure position, orientation, or location during machining.
  • Complexity: Jigs are generally easier to use, as they require less preparation and less skill. Fixtures, being heavier and sturdier, have to withstand stronger vibrations and cutting forces.
  • Weight: Fixtures tend to be heavier and sturdier than jigs due to the need to withstand strong vibrations and cutting forces during the manufacturing process.

In summary, jigs are used to control the location and motion of cutting tools, while fixtures are designed to secure and support workpieces during machining processes. Both jigs and fixtures have the common goal of improving productivity, reducing human effort, reducing errors due to human endurance, facilitating interchangeability, and minimizing rejection in manufacturing processes.

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  • What is the Difference Between Jig and Fixture?
  • Comparative Table: Jig vs Fixture

    • Comparative Table: Jig vs Fixture

    Here is a table comparing the differences between jigs and fixtures:

    Feature Jig Fixture
    Definition A jig is a work-holding device used to hold, support, and locate the workpiece during the production process, guiding the cutting tool. A fixture is a work-holding or support device used to securely locate and support the work, ensuring conformity and interchangeability.
    Cutting Tool Jigs guide the cutting tool during the machining process. Fixtures reference the cutting tool but do not guide it.
    Workpiece Jigs hold and position the workpiece. Fixtures hold and position the workpiece but do not guide it.
    Movement The workpiece moves while the jig remains stationary. The tool moves relative to the workpiece, which is fixed in place.
    Construction Jigs are relatively more complex and expensive to construct. Fixtures are simpler and less expensive to construct.
    Contact Jigs come in contact with the cutting tool. Fixtures never come in contact with the cutting tool.
    Cost Jigs are generally more expensive than fixtures. Fixtures are generally less expensive than jigs.

    Both jigs and fixtures are essential tools in manufacturing and assembly processes, ensuring accurate and consistent results. However, they serve different purposes and have distinct characteristics, as shown in the table above.

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    Guilherme Mazui

    Guilherme Mazui is graduated in journalism from the Federal University of Minas Gerais (UFMG) and a master's degree in Communication from the University of São Paulo (USP). In addition, he has experience in advertising writing and has worked as a content editor in several companies.