Ningbo Kent Bearing Co., Ltd

  Data released by the China Association of Automobile Manufacturers (CAAM) on the 12th shows that in July 2026, new‑energy vehicles accounted for over 60% of monthly new‑car sales for the first time. Monthly auto exports exceeded 1 million units for two consecutive months, with new‑energy vehicles making up more than 50% of such exports over the same period.   Within a precision machine like an automobile, deep‑groove ball bearings 6201, 6202, 6203 and 6004 may go unnoticed, yet they act as the “joints” enabling smooth operation of automotive accessory motors. Compact in size, they perform critical functions of supporting rotors and reducing friction, and directly determine the service life and noise‑free performance of water pumps, oil pumps, air‑conditioning blowers and cooling fans.   Take the 6201 bearing as an example. It is widely applied in electronic water pump motors. Water pumps run continuously at high speeds to dissipate heat for batteries or engines. Thanks to its moderate bore size and load‑bearing capacity, the 6201 maintains stable performance at several thousand revolutions per minute, preventing seal failure and water leakage caused by vibration. For oil pumps in fuel‑powered vehicles, the 6202 bearing features a slightly larger outer diameter and higher rigidity. It better withstands radial loads induced by fluctuating oil pressure, ensuring consistent oil supply and avoiding poor engine lubrication.   Vehicle air‑conditioning systems are extremely sensitive to noise. Manufactured by Kent Bearing, the 6203 bearing delivers an ideal solution with optimized internal clearance and super‑smooth raceways. One motor manufacturer once approached us to resolve a persistent humming noise when the air‑conditioning system was switched on. Through efforts from the Kent technical team, the noise disappeared immediately after fitting properly‑specified 6203 bearings, and air output became more even.   These bearings may look ordinary, but they undergo rigorous refinement in material selection, heat treatment and precision assembly. Kent Bearing pursues no flashy gimmicks, focusing instead on steady load‑bearing and smooth rotation within compact dimensions. It is these tiny, reliable “joints” that allow the vehicle’s water, oil and air systems to operate quietly and efficiently day in and day out, safeguarding overall vehicle comfort and safety.

          Is it true that domestic‑produced bearings lag behind imported alternatives? As a bearing factory with more than 20 years in the industry, I would say the real‑world situation is much more complicated. As we covered in the last segment, due to the Gresham’s law (bad money drives out good), domestic general‑purpose bearings have long been stigmatized as “short service life and poor stability”. Imported brands are mandatorily specified for applications requiring high reliability. Despite technological breakthroughs in high‑end special bearings, domestic standard bearings continue to lose core market share. This is not an unsolvable deadlock. The root cause is not human factors, but three deficiencies within the system. 一 Deficiencies in Acceptance System   There exists a void in visual inspection and standardized acceptance workflows. To tackle this problem, the workshop of Ningbo Kent Bearing is fitted with hardness testers, metallographic inspection stations, vibration testing instruments and service‑life comparison fixtures. Non‑obvious quality parameters are subject to on‑site verification, satisfying the high‑specification requirements of engineers. 二 Oversimplified Procurement Assessment     The practice of awarding bids solely based on the lowest price lacks a full‑life‑cycle cost‑accounting mechanism. Audits assess only the unit price of a single procurement, failing to factor in hidden costs including equipment downtime and maintenance fees, replacement labour costs, and production‑line outage losses. Hence, the overall benefits of high‑quality bearings at a higher price point cannot be quantified.   Ningbo Kent Bearing rejects ostentatious quality claims. We stick firmly to our principles in pursuing cost‑performance. While we may not satisfy all price‑oriented expectations, we remain a benchmark for product quality. 三 Disconnect Between Industry Supply‑side and Demand‑side Standards   No mandatory rules exist for grading and marking of general‑purpose bearings. The domestic market for general‑purpose bearings has no compulsory grade‑labelling specifications. Identical model numbers cover basic, precision, high‑temperature and long‑life variants without clear distinction. Manufacturers may arbitrarily reduce product specifications, making it impossible for procurement staff and engineers to rapidly identify product quality grades. Ningbo Kent Bearing supplies free bearing inspection reports to enable motor manufacturers to differentiate bearing quality.  

  Are domestic bearings truly inferior to imported bearings? With more than 20 years of experience running a bearing factory, I can tell you the reality is far more complicated than you think.   Why is there seemingly no solution for domestic general-purpose bearings? Technology is not the issue. We have successfully manufactured main bearings for national heavy equipment, so technical capability has long ceased to be an obstacle. Neither is management to blame. Staff at every link follow regulations and perform their duties properly, and there is no widespread dereliction of duty. We are trapped in a systemic deadlock: the entire industrial chain has formed a closed-loop logic of self-preservation. Every department only makes risk-free decisions for its own interests, resulting in local optimization yet a total collapse of overall benefits.   Let us analyze the dilemma of bearing manufacturers first. High-end bearings made from electroslag remelting steel with P4/P5 precision require customized bulk orders with high minimum order quantities, and no party will cover the inventory risks brought by individual high-end batch production. For scattered orders and urgent spot orders, manufacturers adopt ordinary refined steel, simplified heat treatment and basic P0 precision; low-spec products sold in large volumes at thin profit margins guarantee steady cash flow. High-end customized orders are scarce and high-risk, driving many manufacturers to voluntarily launch tiered product supply strategies. From the perspective of motor manufacturers, the lowest-bid bidding system and audit assessment restrict procurement choices. Auditors only compare prices for products with identical models and appearance parameters, and do not recognize implicit quality premiums. Procurement managers who select more expensive bearings will face audit accountability, leaving them no choice but to pick the cheapest qualified suppliers.   Leading foreign brands such as SKF and Schaeffler offer no low-end budget product lines, and uniformly enforce strict standards for raw materials, machining and heat treatment across all specifications. Their decades-long brand barriers, paired with global mass production, greatly amortize high-end manufacturing costs, eliminating the need to cut corners to secure orders. They never adopt a dual-quality strategy with premium batches and budget batches.   The end result is the well-known phenomenon of bad money driving out good money. Domestic general-purpose bearings have long been labeled as short-lived and unstable. Imported brands become the default choice for high-reliability working conditions. Although breakthroughs have been achieved in high-end special bearing technologies, domestic standard general bearings keep losing mainstream market share.   In the next article, we will discuss how to break the deadlock of poor public reputation surrounding domestic general-purpose bearings.