Ningbo Kent Bearing Co., Ltd

  Selecting the appropriate bearing clearance requires comprehensive consideration of factors such as bearing type, operating conditions, fit methods, and other multifaceted aspects to ensure the bearing achieves optimal performance during operation (long life, low heat generation, minimal vibration, stable accuracy).     Core Influencing Factors     Operating Conditions:   1. Load Conditions‌ Heavy-load scenarios: Select slightly larger clearance to avoid bearing contact stress concentration. Light-load high-precision applications: Opt for smaller clearance. ‌   2. Rotational Speed‌ High-speed operation: Reserve greater clearance to compensate for thermal expansion (pronounced temperature rise during rotation). Low-speed heavy-load conditions: Choose smaller clearance to enhance rigidity.  ‌   3. Temperature Environment‌ High/low temperature extremes: Select larger clearance to counteract clearance reduction caused by differential thermal expansion between inner and outer rings. Fitting Methods: 1. Interference Fit for Inner Ring‌ When the inner ring adopts an interference fit with the shaft, it induces ring expansion, reducing radial clearance. Compensation requires selecting a ‌larger initial clearance group‌ (e.g., C3/C4). ‌2. Interference Fit for Outer Ring‌ An interference fit between the outer ring and housing causes ring contraction, similarly decreasing clearance. This necessitates ‌elevating the clearance grade‌. ‌3. Clearance Fit‌ For clearance fits between rings and mating surfaces, standard clearance groups (e.g., CN/C0) may be applied without compensation adjustments. Bearing Types ‌    1. Self-Aligning Bearings & Cylindrical Roller Bearings‌     Require larger clearance groups to accommodate self-alignment or compensate for deformation. ‌    2. Angular Contact Ball Bearings & Tapered Roller Bearings‌     Typically require controlled clearance via ‌preload‌ to enhance rigidity.  ‌   3. Deep Groove Ball Bearings‌     Select clearance groups (CN/C2/C3) based on temperature and vibration requirements.  

  "The trial production of the 150,000 RPM motor has reached the third batch, yet the bearing burnout rate remains at 12%. If this continues, the mass production plan for next month will have to be shelved!" When Engineer Wang from a start-up home appliance brand contacted us, his tone was quite anxious.   This vacuum cleaner, marketed with "Hurricane Suction," has delayed mass production three times due to abnormal noises from its self-developed motor.Kent Bearings' salesperson, upon receiving this client, immediately collaborated with the technical department to solve the bearing issues.   Soon, the motor prototype was brought to Kent Bearings' technical department; after disassembling it, the technical team quickly identified the key problem.Facing the client's anxiety, Kent Bearings promptly initiated a full-cycle service mechanism.They intervened from the R&D stage, completing parameter adjustments for the motor bearings and producing samples within a week. During production, engineers were stationed on-site to ensure installation precision throughout the process.During the trial phase, they synchronously tracked test data, making the extreme test results of 500 bearing samples a reassurance for mass production.   Entering the mass production stage, supporting services were further deepened: custom vibration detection for the client's quality inspection team was implemented to ensure every motor bearing shipped out is a premium product. A dedicated service group is online 24/7, ready to respond to any sudden queries during production."Now, our motor has not only passed EU CE certification, but also has 5 dB lower noise than competitors." Engineer Wang's voice on the phone couldn't hide his excitement.                                   Selecting bearings shouldn't solely focus on speed parameters; they must match the vacuum cleaner's operating conditions. Kent Bearings' selection engineers will recommend tailored solutions based on motor power, air duct design, and usage scenarios: for household models, the focus is on quietness, while for commercial models, enhanced wear resistance is emphasized. Nowadays, more and more manufacturers realize that precision bearings are not just a cost, but a 'multiplier' to enhance product capability. Contact Kent Technical Service Team at 19957028916, to make precision bearings the 'invisible engine' of product competitiveness.  

Have the bosses, purchasers, and engineers of water pump factories been tormented by bearings and lost sleep? The customers complained about the loud noise, water leakage, and frequent shutdown of the newly delivered water pumps. The orders were about to be cancelled, and the after-sales costs soared. Are you upset? A few days ago, a water pump factory specializing in water treatment equipment was in a hurry. They had just developed a high-power circulating water pump, which was intended to open up the high-end market. As a result, during the trial operation, the noise of the water pump was so loud that people's ears hurt, and there were frequent problems of shaft seal leakage and bearing jamming. The initial diagnosis was that the bearing was the cause. The water pump manufacturer was helpless. He searched for Kent Bearings in short videos and contacted us. When the technicians of Kent Bearings arrived at the scene and disassembled it, they found that the bearings used in the water pumps had a big problem. The original bearings were not accurate enough, and the raceways were not flat enough, which caused the water pumps to vibrate violently during operation. The sealing structure design was unreasonable, and moisture and dust penetrated into the bearings through the gaps, accelerating rust. The lubrication performance was also not up to standard, and the grease quickly failed in high temperature and high humidity environments. Kent Bearings has deep groove ball bearings specially developed for water pumps. Starting from the raw materials, we use highly rust-proof special steel, combined with a double-layer labyrinth seal structure, to maximize the waterproof and dustproof effect. The high-precision grinding process allows the raceway and steel ball to fit perfectly, and the vibration when the water pump is running is almost negligible. Special grease can also provide long-term lubrication in humid environments. After reinstalling the machine, the noise of the water pump was greatly reduced, and it ran continuously for 72 hours without any trouble! Compared with ordinary bearings, which have poor precision, weak sealing, and short life, they are time bombs when used in water pumps. Frequent rework and replacement of bearings will not only increase costs, but also ruin reputation. Kent bearings, with high precision, strong sealing, and super durability, can adapt to various complex working conditions, helping you reduce after-sales costs and retain high-quality customers.