Insert Bearing Installation Tips from a Maintenance Supervisor
If you have ever tackled an insert bearing replacement, you know it is not just about swapping out the old and popping in the new. It takes patience, the right technique, and a good understanding of how to prevent damage during installation.
Recently, a member of our team spoke to a maintenance supervisor, and he shared his industry tips on how to install an insert bearing into a mounted housing the right way.
Let us set the scene: You are in a factory, replacing bearings on a press. This 100-pound machine spins on two mounted bearings that need to be replaced. Instead of replacing the entire mounted bearing, you decide to replace the insert bearing to save money, especially since the housings are still in good condition. The old insert bearings came out easily, but now it is time to press in the new ones correctly. If you have ever tried to press a bearing into a housing, you know precision is key. The space for inserting the new bearing is tight, and there is a 100-pound piece of machinery looming over your head. No pressure, right?
Tip 1: Prep the Surfaces – Before you even think about pressing, ensure everything is clean and smooth. Rust, burrs, or debris can lead to misalignment or improper seating. Use 220-grit sandpaper lightly to remove surface rust—just enough so your fingertip does not feel roughness. Lubricate the housing and bearing seat with light oil to reduce friction.
Tip 2: Get the Right Pressing Tools – You will want to avoid applying pressing force through the rolling elements—doing so can damage the bearing before it even sees its first spin. Instead, use a driver tool that applies force only to the race being pressed in. If pressing into the housing, apply force to the outer race. If pressing onto a shaft, press on the inner race. A well-fitted piece of pipe can work as a driver, provided it is clean and does not bear against the shield or cage. If necessary, bore out the pipe’s end slightly to ensure an even press.
Tip 3: Double Check – If your hydraulic press does not press flat, you might start the bearing off-center. To prevent this, begin by lightly tapping the bearing into place with a rubber dead-blow mallet to ensure it enters the housing squarely. Once aligned, use the press to apply steady, even pressure, watching for any sideways movement and stopping to realign if needed. Continue pressing until the bearing fully seats, making sure it bottoms out correctly without excessive force.
Tip 4: Consider Heat Expansion – Sometimes, brute force is not the best option. Heating the housing slightly (150-180°F) can expand it just enough to allow the bearing to slip in smoothly. Likewise, cooling the bearing in a freezer can shrink it slightly, making installation easier. Just be ready to move quickly—temperature equalization happens fast!
Final Thoughts: Double-Check Before Spinning
Before firing up the machine, spin the assembly by hand. It should rotate smoothly with no binding. If there is resistance, something is misaligned—better to fix it now than risk a failure later. If you are unsure of any of the above tips, always check the manufacturer’s recommendations.
By taking the time to prep, align, and press your bearings correctly, you are ensuring a longer life for your equipment and a safer working environment. So, next time you are pressing a bearing, remember: slow and steady wins the race!
If you are looking for a new complete mounted bearings, click here and shop online. Most of our bearings ship within 1-2 business days. Additionally, individual bearing inserts and housings are available via phone at (800) 686-1627.
