It is critical that you have the proper hose measurement in mind before cutting and crimping your hose, otherwise your assembly is not going to be as efficient as it can be. And, we all know that lower efficiency negatively impacts our bottom line!
Before beginning your hose crimping, there are a few safety reminders that are important to keep in mind:
Your saw’s safety guard should be working properly.
Always wear safety glasses.
Make sure that all contamination of any kind is removed before you install the fittings.
Brush, air, pellet or solvent flush the hose from both ends.
Whether you’re using a smooth or scalloped saw blade, the pins on the cutting table must be positioned to bend the hose as far as possible without kinking. Then, you want to make sure that your cut is as clean and square as possible, or the hose might not insert properly into the fitting.
Proper length is key
Now let’s talk about getting your overall length right. Proper fitting cut-off factors should be used to assure correct assembly length. These factors are found in the appropriate fitting catalog adjacent to the fitting illustration. Here are the industry standards for the overall length variations of a hose assembly:
Bent tube and angle-type fittings
Certain assemblies use bent tube or other angle-type fittings. If there is a bent tube fitting on each end, they might not lie in the same plane. The difference between the end fittings is known as “offset”. In these cases, you will need a protractor. If you are unfamiliar with this procedure, refer to the Parker Hose Assembly Fabrication Guide or ask the professionals at your local ParkerStore.
Another important thing to remember - when deciding on a hose assembly length for an installation, you should add 5% to the minimum length required. This is to consider both the assembly length tolerance and the change in length that occurs from pressurizing the hose. Once pressurized, hydraulic hoses can change in length anywhere from 2% longer to 4% shorter. Change in hose length from pressurizing a hose is the result of the hose reinforcement moving towards the neutral braid angle.
Once you’ve measured and cut your hose, if you have any questions about crimping, check out Parker CrimpSource. It is the industry’s most complete resource for crimper technical information. CrimpSource provides easy access to all the specifications necessary to correctly fabricate a factory-quality hose assembly.
If you’re looking to add a crimping machine to your shop, the Parker family of crimping machines enable you to make factory-quality hose assemblies quickly, easily and cost-effectively.
We hope this this information has been beneficial. You can always contact your local ParkerStore if you have any questions about how to get the proper hose measurement and assembly length for your hose assembly, or for solutions to any of your motion and control challenges. That is at the core of what we do.
Watch the video and see Mike, our ParkerStore professional, demonstrate how to get the proper length for your hose assembly:
Post contributed by:
Suzanne Favri, Digital Marketing Specialist
Global Distribution & Sales Services, Parker Hannifin.
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