In the image shown above we see an application for a precision friction hinge.  The product shown above is a back rest for use in a critical care facility. It supports a weak back when using the commode. The green pad is soft, so the patient won’t be bruised. This sort of application is one which a specific torque would be required so that it is easy to adjust by hand or leaning your back against it. If the friction hinge which held the back rest was too difficult to adjust the user would be extremely uncomfortable.  Mechanical Motion Technologies designs friction elements for applications that matter in the real world and are useful. User interface is very important to us and the precision engineering in our friction hinges reflect that attitude. If you want to add that functional reliability , high quality feel to your product contact us for consultation. www.mmtech.us