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how to install and properly measure plastic bearings

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tech talk Learn more at www.igus.com The manner in which a bearing is installed and quality tested is essential to the success of any mechanical system. If the installation of the bearing is incorrectly done, or if the quality-testing methods fall short, a variety of problems can arise. By abiding by the following installation tips and ensuring the appropriate quality checks have been performed, your bearings will operate properly from the beginning. Conducting quality checks on your bearings after installation is extremely important and can be done in a number of ways. igus ® uses a pin-gage test, also called a "go/no-go" test, to make sure our bearings are within specifications and will work properly once in service. It is important to keep in mind that all measurement testing should be conducted after the bearing is press-fit into the housing. igus ® bearing tolerances, for example, are based on parts being pressed into a steel housing bore. Prior to press-fitting, the bearing will be oversized and may not conform to the listed specifications. igus ® catalog recommendations are based on a steel housing bore—any variation might have an effect on the dimensions after the bearing is pressed. First and foremost, the bearings need to be installed. Here are three important recommendations for bearing installation: 1) Use an arbor press to press-fit the bearings. This is the most efficient installation method, and it is extremely important for preserving the integrity of the bearing. For example, if you use a hammer for installation, the bearing might become uneven. 2) Ensure your bearing housing has a lead-in chamfer. igus ® recommends a 25-30 degree chamfer for iglide ® bearings, and that it is press-fit with the outside chamfer of the bearing against the housing chamfer (for flange bearings, the sleeve portion will have this). 3) Ensure your ID-after-press-fit matches the tolerances for the bearing. When installing an iglide ® bearing, the recommended tolerances are based on press-fitting the bearing into a steel housing bore. Other housing materials are acceptable, however, igus ® performs its quality tests using a steel housing bore. If you are using an iglide ® bearing with a different housing material, the bearing's ID- after-press-fit may not match up with our catalog descriptions. How to Install & Properly Measure Plastic Plain Bearings Installing arbor press used to press-fit a plain bearing during installation

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