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How to Crimp Hydraulic Hose Fittings

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Crimping hydraulic hose fittings is a crucial skill for anyone who works with machinery that relies on hydraulic systems. A secure and properly crimped hose ensures the safe and efficient operation of equipment. However, it’s important to note that crimping can be complex and requires specific tools and knowledge.

What Are Hydraulic Hose Fittings

hydraulic hose fittings wholesale
hydraulic hose fittings wholesale

Hydraulic hose fittings are the essential connectors that form the link between hydraulic hoses and other components in a hydraulic system. They perform two critical functions:

  1. Connection: They establish a secure and leak-proof joint between the flexible hydraulic hose and rigid components like pumps, valves, cylinders, or other hoses.
  2. Fluid Transfer: They facilitate the flow of pressurized hydraulic fluid within the system, directing it where it’s needed to power machinery or equipment.

Here’s a deeper dive into key aspects of hydraulic hose fittings:

  • Types: There are various types of hydraulic hose fittings, each designed for specific applications and pressure ratings. Common types include crimp fittings (permanent), reusable fittings, and flange fittings.
  • Materials: They are typically made from durable materials like steel, stainless steel, or brass to withstand high pressures and harsh environments.
  • Selection Factors: Choosing the right fitting depends on several factors, including the hose size and type, pressure requirements, operating temperature, and compatibility with the fluid being used.
  • Importance: Secure and properly chosen hydraulic hose fittings are vital for a safe and efficient hydraulic system. They prevent leaks, ensure proper fluid flow, and contribute to the overall reliability of the system.

What Is Hydraulic Hose Crimping

before and after hydraulic hose fitting crimping
before and after hydraulic hose fitting crimping

Hydraulic hose fitting crimping is the process of attaching a metal fitting to the end of a hydraulic hose using a specialized crimping tool. This creates a secure and permanent connection that can withstand the high pressures of hydraulic systems.

Here’s a breakdown of the importance of crimping:

  • Safety: A properly crimped hose ensures the safe operation of hydraulic equipment. A faulty crimp can lead to leaks, hose ruptures, and potential injuries.
  • Performance: A secure crimp guarantees a leak-free connection, which is crucial for maintaining the efficiency of the hydraulic system.
  • Reliability: Crimping strengthens the hose-fitting assembly, making it resistant to high pressure and fluid flow.

Crimping requires specific tools and expertise. If you’re not comfortable doing it yourself, it’s always best to seek help from a qualified professional.

How to Crimp Hydraulic Hose Fittings

While seeking professional help is always an option, here’s a breakdown of how to crimp hydraulic hose fittings yourself, assuming you have the necessary tools and are comfortable following safety protocols (covered later). Remember, precision is key, so follow each step carefully.


  • Hydraulic hose (ensure it’s compatible with your system’s pressure and fluid)
  • Hydraulic fitting (correct size and type for your hose)
  • Hose cutter (ideally a hose saw for clean cuts)
  • Deburring tool (optional, but recommended to remove any burrs left from cutting)
  • Hydraulic crimping machine (ensure it has the appropriate die set for your hose and fitting combination)
  • Calipers (for accurate measurements)
  • Lubricant compatible with your hose material
  • Safety glasses and gloves

Steps about crimping hydraulic hose fittings

Measure and Cut the Hose:

  • Carefully measure the required hose length. Refer to manufacturer specifications for the proper cut-off factor and subtract it from your desired length.
  • Use a sharp hose saw to make a clean, square cut on the hose end. Deburr the cut edge if needed.

Prepare the Fitting:

  • Apply a thin layer of compatible lubricant to the fitting insertion point on the hose.

Set Up the Crimper:

  • Consult the crimper’s manual and manufacturer specifications for your hose and fitting combination to determine the correct crimp profile and pressure.
  • Install the appropriate die set onto the crimping machine. Double-check for compatibility.

Insert the Fitting:

  • Carefully push the lubricated hose end into the fitting until it reaches the designated insertion depth (often indicated by a mark on the fitting or hose). Use an insertion depth tool for precise positioning.

Crimp the Hose:

  • Secure the hose assembly in the crimping machine following the manufacturer‘s instructions.
  • Initiate the crimping process according to the machine’s controls. The crimper will automatically apply the necessary pressure to form the crimp based on your chosen settings.

Verify the Crimp:

  • Once crimping is complete, use calipers to measure the final crimp diameter at designated points on the fitting. Ensure it meets the manufacturer‘s specifications for a secure and leak-proof connection.

Inspect and Cap the Assembly:

  • Visually inspect the crimped area for any cracks, imperfections, or unevenness.
  • If everything appears good, install appropriate caps on the hose ends to prevent contamination.

    Safety Precautions:

    • Always wear safety glasses and gloves when working with hydraulic components.
    • Ensure the crimping machine is properly calibrated and maintained.
    • Never exceed the pressure rating of the hose or fitting.
    • Dispose of used hoses responsibly; do not reuse them.

    Remember: This is a general guide, and specific steps may vary depending on your equipment and materials. Refer to the manufacturer‘s instructions for your hose, fitting, and crimping machine for the most accurate and safe procedures. If you’re unsure about any step, consult a qualified hydraulics professional.

    Hydraulic Hose Fitting Crimping Machine

    A hydraulic hose fitting crimping machine is a specialized tool used to attach a metal fitting to the end of a hydraulic hose by creating a permanent crimp. This crimp creates a secure and leak-proof connection that can withstand the high pressures of hydraulic systems.

    There are two main types of hydraulic hose fitting crimping machines:

    • Manual hydraulic hose crimping machines: These machines are operated by hand and are typically used for lower-volume applications or in workshops.
    • Electric hydraulic hose crimping machines: These machines are powered by an electric motor and are faster and more powerful than manual machines. They are typically used for higher-volume applications or in production environments.


    In conclusion, crimping hydraulic hose fittings is a crucial skill for maintaining hydraulic systems. While it requires specific tools and precise execution, a well-crimped hose ensures safety, performance, and reliability.

    This guide has provided a foundational understanding of the process, from selecting the right materials to verifying the final crimp. Remember, safety is paramount. If you’re unsure about any step or lack the necessary equipment, don’t hesitate to seek help from a qualified hydraulics professional.

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