**Inspection of NTN Imported Bearings During Operation** Home > Bearing Knowledge > Inspection of Iron Bearings in Operation *Created on 2018/5/16* var cpro_id = "u3440131";

Inspection of NTN Imported Bearings in Operation

---

/*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';

When inspecting NTN imported bearings during operation, one of the first signs to look for is vibration. Vibration measurements can detect issues such as detachment, indentation, rust, cracks, and wear. The vibration level of NTN bearings is very sensitive to internal damage, so using a specialized vibration measuring device like a frequency analyzer can help identify significant vibrations. The placement and orientation of the sensor equipment may vary depending on the application, so it's important to analyze and compare previous measurement data to establish a baseline for normal performance. Another key aspect is listening to the sound produced by the NTN bearings during rotation. Minor damage such as peeling or surface defects can cause abnormal or irregular noises. Using a stethoscope or sound detection tool can help differentiate between normal and abnormal sounds, allowing for early identification of potential problems. Checking the temperature of the NTN bearing is also crucial. If possible, measure the outer ring temperature directly. Normally, the temperature rises gradually after the machine starts and stabilizes within 1–2 hours. However, if the temperature increases rapidly or remains abnormally high, it could indicate a serious issue, and the machine should be stopped immediately for inspection. Before races or competitions, checking the axle is essential. Early signs of wear or damage to the bearing can be detected, and timely maintenance or replacement can prevent more severe failures. A simple method to check the condition of NTN bearings is by touch. In industrial settings, excessive heat from the bearing can be felt by hand. This heat may affect the lubricant and cause damage. By touching the hub’s axis, you can sense whether the bearing is smooth or if there are irregularities, such as dents or misalignment. Inspecting the appearance of the bearing is also important. Check if the seal is intact and open it to see if the lubricant is dry, discolored, or contaminated. Black residue may indicate oil pollution or carbonization, while white turbidity suggests water contamination. Early detection of these issues is critical to avoid further damage. Using an electronic stethoscope is another effective way to assess the condition of NTN bearings. A steady humming sound usually indicates normal operation, while buzzing or sharp noises may signal abnormalities. Squeaking sounds might suggest oil contamination, and irregular murmurs could point to raceway damage. For a more hands-on approach, you can use a wooden stick placed on the fork of a bicycle and listen through it to detect any unusual sounds. However, this method may not be as accurate when checking the center shaft due to background noise. --- **Related Bearing Knowledge** - Intake and Exhaust Control Motor Bearing - SKF Spherical Roller Bearings – “Device Skills Explanation” for Coded Angle Touch Ball Bearings - Discussion on Decoupling Control Strategy of Permanent Magnet Type Bearingless Motor This article is linked from http:// Please credit China Bearing Network at http:// Previous: The Bearing Device Method | Next: "Motorcycle Bearing" Protection Method – Keep It Looking New

INDOOR LIGHTING

Indoor Lighting,Home Ceiling Lighting,Led Flat Tube Batten Light,Indoor Led Linear Light

JIANGMEN MICHEN LIGHTING CO.,LTD , https://www.jmmission.com