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Can Excessive Motor Bearing Temperature Burn the Windings? Causes, Heat Transfer and Fault Diagnosis

  Q: Can excessive motor bearing temperature burn the windings? A: It can contribute to winding damage, but high bearing temperature does not necessarily mean that the motor windings will burn out. Bearings and windings perform different functions, but they are thermally interconnected during motor operation. Excessive bearing temperature can transfer heat through the shaft, bearing housing, end shield, and internal air, increasing the overall thermal load inside the motor. If the bearing temperature is only temporarily elevated and remains within the allowable operating range, it generally will not directly damage the windings. However, if bearing overheating continues and leads to lubrication deterioration, severe wear, seizure, or bearing lock-up, the resulting mechanical resistance can increase motor load and current. If the motor protection system does not interrupt the abnormal condition in time, the windings may experience excessive thermal stress, potentially causing insula...
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ZYS Launches 2026 Quality Month | End-to-End Quality Excellence

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    As golden September arrives, Luoyang Bearing Research Institute Co., Ltd. (ZYS) embarks on a new journey of quality excellence. In strict alignment with the quality management deployments of Sinomach and Sinomach-PI, ZYS officially launched its 2026 "Quality Month" campaign. Centered on the theme "Strengthening End-to-End Quality, Championing ZYS Responsibility," the initiative calls upon every ZYS employee to embrace their roles, uphold strict quality responsibilities, and translate craftsmanship into everyday action—safeguarding the company's sustainable, high-quality development through precision workmanship across the entire value chain. Quality is never merely a slogan. It is embedded in every rigorous blueprint verification, embodied in every step of precision manufacturing, and consistently demonstrated in every detailed inspection and testing procedure. Reliable product quality relies on the steadfast dedication of every position; long-term corpora...
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Custom Bearing RFQ Engineering Guide: Critical Factors Beyond Dimensions

  A custom bearing inquiry almost always starts with a drawing specifying the Bore, Outside Diameter (OD), and Width. However, dimensional envelope alone is rarely enough to guarantee reliable performance. Unlike off-the-shelf catalog bearings, ordering custom bearings requires evaluating the component as part of an integrated dynamic system. A bearing that fits perfectly can still fail due to: · Insufficient dynamic load capacity · Thermal clearance loss after press-fit · Incompatible lubrication at operating speeds · Inadequate housing/shaft geometric tolerances 1. Application-First RFQ Strategy To prevent premature failure, transition your RFQ from a purely dimensional request to an application-driven profile. Key System Parameters to Provide: Duty Cycle: Continuous operation vs. frequent start/stop, shock loads, or peak accelerations. Operating Envelope: Continuous/max speed (RPM), ambient & operating temperatures, environmental exposure (moisture, dust, chemicals). Target ...
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Sinomach-PI Successfully Hosts 2026 Qualification Training on Safety and Occupational Health Management

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  To thoroughly implement national laws and regulations on work safety and occupational health, and to comprehensively enhance the professional expertise and management standards of the company’s safety and occupational health team, Sinomach Precision Industry Group Co., Ltd. recently organized a qualification training program on safety and occupational health management. Over 80 participants from the headquarters and Zhengzhou-based subsidiaries attended the training and passed the assessment. Notably, the General Manager and Safety Director of Zhengzhou Sinomach Precision Industry Development Co., Ltd., attended the sessions alongside all trainees and successfully past the certification assessment with high scores. The training covered a comprehensive range of critical topics, including work safety laws and regulations, occupational health management practices, accident prevention, and emergency response. During the sessions, industry experts presented in-depth yet accessible ana...
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Standards Lead Innovation | ZYS Advances Rolling Bearing Standardization to Drive Industry Upgrading

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    Standards serve as a core anchor for economic activities, technological innovation, and industrial modernization. As the host organization for the Secretariat of the China National Rolling Bearing Standardization Technical Committee, the domestic matching unit for ISO/TC 4, and the Secretariat for ISO/TC 4/SC 6 (Insert Bearings) and SC 11 (Linear Motion Rolling Bearings), Luoyang Bearing Research Institute Co., Ltd. (ZYS) continues to promote high-quality development in the bearing industry through standardization. Strategic Focus: Building a Future-Ready Standardization Mechanism As China's bearing sector advances toward high-end self-reliance and global competitiveness, ZYS actively refines standardization mechanisms to closely align standard development with industrial needs: Systematic Framework Development: Aligning with national standardization strategies and high-end machinery guidelines, ZYS systematically optimizes the rolling bearing standard structure. Prof...
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Deep Groove Ball Bearing Internal Clearance: Types & Selection Guide | ZYS

  Deep groove ball bearings are designed to operate with a controlled amount of internal clearance between the rolling elements and raceways. Although bearing clearance is usually specified by a small code such as C2, CN, C3, or C4, its influence on bearing performance is significant. Internal clearance directly affects the load distribution between the balls and raceways, operating friction, temperature rise, structural vibration, noise, and overall bearing service life. More importantly, the clearance specified for a new unmounted bearing is not necessarily the clearance that the bearing will maintain after installation or during operation. Selecting the correct deep groove ball bearing clearance requires more than simply choosing between CN and C3. Shaft and housing fits, operating temperature differences, rotational speed, dynamic load, and mounting conditions must all be evaluated as an integrated system. What Is Deep Groove Ball Bearing Internal Clearance? Bearing internal cl...
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Wind Turbine Bearing Failure Analysis: Methods & Root Causes

 In wind turbines, a bearing failure can be the result of a combination of factors involving load, lubrication, material, heat treatment, manufacturing quality, installation, operating conditions and the surrounding drivetrain. Simply replacing the damaged bearing may restore operation temporarily, but it does not necessarily solve the underlying problem. For this reason, bearing failure analysis is an important part of wind turbine reliability improvement. A proper investigation starts with the failed bearing itself, but it does not stop there. The damage morphology needs to be examined together with operating data, material properties, heat treatment condition and manufacturing characteristics. The objective is to identify the most probable root cause and provide practical measures to prevent the same failure from occurring again. Why Is Wind Turbine Bearing Failure Analysis Important? Wind turbine bearings operate under variable loads and complex environmental conditions. Main b...
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