![]() A rivet is only guaranteed to function as designed when the hole size is within the prescribed range. ![]() We specify a hole size for every rivet we manufacture. Hole Size: Hole sizes are extremely important for the proper functionality of blind rivets. While the grip may be calculated by adding the thickness of the two materials together, be sure to account for any burrs, bends and manufacturing tolerances which may increase or decrease the overall grip of the materials being riveted. ![]() Also be sure to account for the theoretical grip versus the actual grip. Failure to adhere to the grip range may also cause a premature break or difficulty in clearing the spent mandrel from the setting tool. Rivets set under-grip can bend and offset, reducing the overall strength and aesthetic appearance. Rivets set over-grip will not retain the mandrel head, causing it to fall out of the rivet body after setting. Setting rivets outside of their specified grip range can lead to functional failures. This thickness is commonly called the grip range. All manufacturers list a range of material thickness in which the product will perform properly. If the rivet is applied over or under its intended grip range, it may not work properly. Grip Range: Determining the length of the rivet is critical to ensure the rivet will function as intended.
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