A wide variety of industries use mechanical and air-actuated clamps with a rubber surface for holding test specimens. And one of the most common problems with this configuration: worn out rubber padding on the jaws (anvils) of the clamps. So if your quality control people start asking if the air pressure has changed in the lab, start complaining about having to do extra samples because the material is slipping, or insist there is something wrong “with the tester” the first thing to inspect should be the rubber pads on your anvils.
Most clamp systems, particularly air clamps, have a fixed distance between the jaws that is reserved for holding a sample. The thickness of the jaw(anvil), including the rubber, plays a key role in how firmly a sample will be held. As rubber wears out the distance between the jaw(anvil) increases.
Eventually this leads to samples slipping, especially as the amount of force increases. As the rubber wears out it also becomes slippery, leading to slipping and inconsistent test results.
Most companies let the rubber wear out well beyond the time frame it should be changed. This time varies based on the amount of testing completed but generally should never be more than a year or so.
Replacing rubber padding, fortunately, is a very quick and inexpensive process. PTES has resurfaced jaws(anvils) for years and at a very competitive prices. Our customers simply ship their jaws(anvils) to us in a box with a purchase order and in 2-3 business days their resurfaced anvils are on their way back. Pricing is as low as $59 per jaw(anvil) plus return shipping.