Six Common Crimping Mistakes

6 Common Crimping Mistakes


Let’s start our latest blog with explaining what exactly crimping is.  It’s the process of joining two or more pieces of metal by deforming either or both elements so that they hold each other securely.

For those that understand hoses, you will understand that it’s a vital component of any hose assembly.


There is a lot that can go wrong however, so here are some of the common errors….


Using the wrong crimper

Trying to use a crimper that has insufficient pressure to crimp a particular hose or fitting.


Using the wrong crimp die

Using a crimp die that is the wrong size or meant for a different series fitting.



Disengaging the cylinder before it bottoms out and fully comes into contact with the die ring.


Using the wrong die ring

Don’t assume, check the specifications.


Using the wrong fitting

Accidentally using the wrong series fitting or using a fitting that is not compatible with the hose you’re crimping.


Not pushing the fitting onto the hose far enough before crimping

Wrong hose insertion depth.


With these problems in mind, it’s easy to see that understanding the best practices of crimping is crucial to ensuring that you avoid unnecessary downtime or serious risk of injury.


To ensure the best crimp every time, here’s what you need to do:

  • Gather all the required tools
  • Mark insertion depth
  • Push hose into coupling to marked depth
  • Choose correct dies and insert into die holder
  • Set machine crimp setting via crimp data sheet
  • Insert hose and fittings into machine dies
  • Operated pump until indicator light illuminates
  • Release pressure until die opens and assembly is released
  • Visually inspect for defects and measure crimp diameter against data sheet


For more information on hose crimping please feel free to give us a call on +44(0)191 549 7335 or email us at

What Our Clients Say

We have worked with HOS for many years from small subsea cable ploughs to large J lay pipe installation towers, they are always willing to go above and beyond to meet our requirements & are experienced, friendly and willing to do what they can to help.

Lead Engineer – Multi National Maritime Solutions Provider

HOS offer a prompt supply service, along with technical assistance, quality is always at a high standard, we have developed an extremely good working relationship which we hope to continue to build on for future requirements.

Production Manager – National Engineering Company

We would highly recommend HOS, we receive excellent customer service, quick delivery and great product quality.

Administration & Marketing Manager – Engineering Solutions Provider

96 x 4SH hose assemblies – measured, tagged, pressure tested, flushed, installed and certified within 7-day window, Wow!

Ship Superintendent – Oil Rig Support Vessel

Thanks again for all your work on the recent project, great turn-a-round in less than a week for two complete marine hydraulic hose kits which were manufactured, pressure tested and flushed, complete with full documentation pack.

Head of Construction - International Subsea Engineering Company