1. Preparations Before Mounting
Q: How should I prepare bearing mounting surfaces? A: Remove any burrs, cutting chips, rust, or dirt from shafts and housings using fine-grade sandpaper and clean paper. Apply a light coat of spindle oil to lubricate clean surfaces. This prevents contaminants from causing noise and vibration during operation.
Q: What precautions should I take with mounting equipment? A: Ensure pressing blocks, driving plates, hammers, and tools are clean, burr-free, and the correct size. Contaminated or improper tools can damage the bearing.
Q: When should I unwrap bearings? A: Unwrap only just before mounting to protect from dust and damage. Keep them in original packaging until needed.
Q: Can I modify bearings? A: No. Bearings are precision-manufactured to tight tolerances. Any modifications can compromise accuracy and performance.
2. Bearing Mounting
Q: What are the correct mounting procedures? A: Apply force only to the ring being press-fitted (inner ring for shaft mounting, outer ring for housing). Use a pressing arbor or uniform-face tool for even pressure. For simultaneous mounting, use a driving plate on both rings. Exceeding the basic static load rating (per catalog) causes permanent deformation.
Q: Why should I avoid using a hammer for mounting? A: Hammers cause sharp impacts, leading to brinelling, scarring, or denting on narrow contact surfaces between rolling elements and raceways. This results in noise, vibration, and rough rotation. Use a press instead.
Q: How susceptible are bearings to impacts and contamination? A: Highly susceptible. Even dropping a bearing can cause damage. Foreign particles during rotation lead to embedding, denting, scarring, and excess noise. Always work in a clean environment.
Q: What is temperature mounting, and how do I do it? A: Used for large or heavy interference-fit bearings. Heat the inner ring (not exceeding 120°C) via oil immersion (suspend with wire to avoid uneven heating), oven, or induction. Refer to expansion graph for temperature based on fit and bore diameter. Hold in place on shaft until fully cooled to prevent gaps.
Q: What precautions apply when heating bearings? A: Never exceed 120°C oil temperature. Avoid for pre-greased, sealed, or shielded bearings. Use clean oil; demagnetize after induction heating. Contact us for details.
3. Inspection After Mounting
Q: How do I inspect a bearing after mounting? A: Rotate the shaft/housing manually to check for unusual feel. Then, run without load at low speed, gradually increasing speed/load while monitoring noise, vibration, and temperature. Stop if anomalies occur. Compare noise to standard mounted bearings.
4. Bearing Removal
Q: How should I remove a bearing safely? A: Use protective equipment and tools like bearing pullers or presses. Apply force only to the ring being removed (reverse of mounting). Avoid damaging machinery or workers.
Q: Can I reuse removed bearings? A: Generally not recommended. If considering reuse, inspect carefully per mounting guidelines in reverse. Press-fit removal by forcing the outer ring disqualifies reuse.
5. Bearing Storage
Q: How should I store bearings? A: In low-humidity areas (<60% RH), on shelves/pallets at least 20 cm off the ground. Avoid stacking boxes high to prevent squeezing out rust preventative. Original packaging protects until use.
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