Ningbo Kent Bearing Co., Ltd

KENT&SKF SKF adopts exclusive ultra-clean bearing steel (e.g., NitroMax) and vacuum degassing technology, delivering extremely low oxygen content and stringent control over inclusions and carbides. With over 20 years of in-depth dedication to the bearing industry, Kenda Bearing consistently adopts international-standard GCr15 high-carbon chromium bearing steel featuring stable material performance. Through multiple precision grinding processes, our bearings withstand both radial and axial forces, with precision grades covering P0, P6, P5,P4. As a global leader in the bearing industry, SKF boasts world-leading vibration and noise performance. Kenda Bearing is equipped with fully automatic noise and vibration monitoring equipment to efficiently classify the technical grade of each product, achieving vibration and noise levels of ZV2/ZV3/ZV4. SKF owns massive motor and working condition test databases as well as complete ISO and industrial certification qualifications. Kenda Bearing’s products are sold worldwide and have obtained ISO9001:2015 quality management system certification, RoHS certification and SGS certification.                              We are ourselfves Through two decades of dedicated R&D, continuous production equipment upgrading, technical team capability improvement and standardized production management, Kenda Bearing has built a high-quality professional team. We have earned wide recognition from customers for our reliable quality, competitive pricing, professional service and reliable after-sales support. We deliver ultra-high cost performance and fast delivery, with unique advantages in localized working condition adaptation, professional services and independent, secure supply chains. Our products deliver qualified and upgradable performance for medium and low-end mass-volume scenarios. Slogan Choose Kenda Bearing — Quality Bearings Power Global Industry.

KENT BEARING   Bearing clearance selection is critical for motor operation. Unstable bearing‑clearance accuracy lands many enterprises in a predicament where bearings are treated as consumables and frequently replaced.   Proper clearance selection can effectively prevent seizure, reduce noise and extend service life. As a widely‑used model for small‑sized motors, the 6202 bearing with C3 clearance is critical for operating conditions featuring high speed and temperature rise. Nevertheless, inferior products often suffer premature failure due to high sensitivity to micro‑dimensional tolerances.   The KENT 6202 C3 bearing eliminates this pain point through precision manufacturing. A power‑tool manufacturer previously used standard 6202 bearings for its angle‑grinder motors. After 30‑minute continuous operation, thermal expansion caused bearing seizure, bringing the rework rate as high as 5%. After switching to KENT 6202 C3 bearings, temperature rise remained stable over 2‑hour operation under identical working conditions, and the rework rate dropped to 0.3% within half a year.   This outstanding performance stems from KENT’s relentless pursuit of product excellence. Vacuum‑degassed bearing steel and precision heat‑treatment processes guarantee micron‑level stability of C3 clearance even under high‑temperature conditions. The dynamic‑clearance‑compensation design keeps the bearing operating at its optimal state amid alternating cold‑and‑hot cycles, delivering truly worry‑free reliability — “install it and forget it”.   Customers also benefit greatly from KENT’s full‑cycle service support. We offer customized clearance‑selection consultation, alongside on‑site engineer diagnosis and installation guidance to avoid premature failure caused by improper bearing application. Test reports are available for every production batch for full quality traceability.   Choose KENT, and put an end to motor‑bearing troubles. We sell far more than bearings; we deliver a promise of trouble‑free operation. A real problem‑solver never lets customers pay twice for the same issue.

High‑temperature Bearing   Conventional bearings depend heavily on sealing rings to achieve tight sealing. High‑temperature bearings rarely use standard contact rubber seals; labyrinth non‑contact seals are widely applied, and some only feature basic dust‑proof treatment. The rubber seals of conventional bearings tightly fit against the inner and outer rings by material elasticity to block dust and moisture. However, general‑purpose polymer sealing materials such as nitrile rubber have limited temperature resistance. Once exceeding the critical temperature, they will rapidly harden, crack and lose elasticity. The seals fail first, and fallen debris may intrude into the bearing interior and cause secondary contamination. Fatal Drawbacks of Contact‑Type Seals under High‑Temperature Working Conditions   01 The material has an insufficient maximum temperature resistance, and cannot match the continuous‑operation environment of high‑temperature bearings, leading to aging and failure within a short period.。 02 The sealing lip generates continuous heat through friction. This heat can be negligible at ambient temperature. However, in high‑temperature environments, the additional temperature rise accelerates grease oxidation and deterioration, greatly shortening the service life of the bearing.。     In short: under high‑temperature working conditions, rubber sealing rings fail to deliver long‑term protection; instead, they become hidden hazards that accelerate bearing damage.   KENT Bearing’s solution is to adopt labyrinth‑type non‑contact seals. Tortuous clearance channels are formed between the inner and outer rings. Impurities are blocked from intrusion via these labyrinth paths, and protection is achieved without material contact. Free of frictional heat generation and rubber heat‑resistance bottlenecks, dust‑proof performance is realized by mechanical structure rather than rubber elasticity. For ultra‑high‑temperature applications with clean surroundings, open‑type structures combined with external protective shields are also adopted for joint protection. Under such conditions, temperature rise and material aging risks caused by full sealing far outweigh the threat of impurity ingress.   Every structural trade‑off for high‑temperature bearings comes from repeated evaluation against actual working conditions. Seemingly “simplified” sealing solutions are in fact professional designs tailored for high‑temperature environments. When selecting bearings, do not merely refer to parameter tables. Understanding the matching logic between working conditions and structures is the key to stable and durable solutions.   With over 20 years of dedication to the bearing industry, KENT Bearing keeps investing in core‑technology research and has built distinct product advantages. Compared with peers, our products not only meet strict noise‑reduction requirements across multiple industries, but also satisfy customers’ core demand for long service life with genuine quality and outstanding durability.