China Beining Intelligent Technology (Zhejiang) Co., Ltd Company News

Precision, reliability, and long life in machine tool spindles don’t happen by accident. One of the most important—but often overlooked—factors is bearing preload. Preload is the controlled axial force applied to bearings during spindle assembly. It’s not just a step in installation—it’s a key design decision that directly affects how your spindle performs every day. What Does Proper Preload Do? When done right, bearing preload delivers real-world benefits: 1.Higher Rigidity = Better Accuracy Preload removes internal clearance, so the bearing resists deflection under cutting forces. This means your spindle stays stable during heavy cuts—resulting in tighter tolerances and smoother surface finishes. 2.Less Runout, Less Vibration With no play between components, rotational accuracy improves. Axial and radial runout drop, reducing chatter and vibration—critical for fine-detail machining. 3.Longer Bearing Life Even load distribution prevents stress hotspots. Plus, preload reduces skidding (micro-slippage) of rolling elements—especially at startup or high speeds—cutting down on wear and early failure. 4.Quieter, Smoother Operation A well-preloaded bearing runs smoothly without the clunk or noise caused by parts moving in and out of clearance zones. Quiet operation often signals a healthy spindle. 5.Stable Performance Under Heat During high-speed runs, metal parts expand. Proper preload compensates for thermal growth, keeping bearings securely seated and preventing loss of precision. How to Apply Preload the Right Way Getting preload right isn’t guesswork. Here’s what matters: Choose the Right Amount Too little? Your spindle lacks stiffness. Too much? Bearings overheat and fail fast. The ideal preload is usually 10–30% of the bearing’s original radial clearance, adjusted for your specific speed, load, and temperature conditions. When in doubt, consult a bearing specialist. Pick the Best Method for Your Application 1.Fixed (Position) Preload: Uses precision-ground spacers. Best for medium-speed, high-load spindles where maximum rigidity is needed. 2.Spring (Constant Pressure) Preload: Uses disc or coil springs. Ideal for high-speed spindles—it automatically adjusts for thermal expansion and wear, avoiding dangerous over-preload. Account for Heat in Real Operation In high-precision machines, temperature changes affect preload. Advanced spindles may include sensors and active systems to maintain optimal preload during operation—keeping accuracy consistent from first cut to last. Final Thought: Preload Is Part of the System Great spindle performance comes from more than just high-quality bearings—it comes from how they’re installed and tuned. For angular contact ball bearings (often used in matched pairs), preload is especially critical. At Beining Technology, we design and manufacture precision spindle bearings used in CNC machines worldwide. But we also share deep application knowledge—because the best bearing only delivers its full potential when paired with the right engineering support. Need help choosing the right preload strategy for your spindle? Contact our engineering team—we’ll help you get the accuracy, life, and reliability your machine deserves.    

The spindle is the heart of any CNC machine, spinning at high speeds with extreme precision. At its core are the spindle bearings, critical rotating components that endure heavy loads, heat, and stress. Over time, they wear out, leading to noise, vibration, or overheating. Replacing them correctly is essential to restore accuracy, performance, and longevity. Here is a step-by-step guide to do it right. Step 1: Remove the Spindle Housing Use appropriate tools such as screwdrivers or wrenches to remove protective covers. Carefully extract the entire spindle assembly—use a hoist if necessary. Avoid any impacts or drops, as even minor shocks can damage internal components. Step 2: Remove the Old Bearings Use a bearing puller clamped onto the inner ring to apply even force during removal. For tight-fit bearings, heat the spindle housing evenly to 50–80°C using an induction heater. This thermal expansion makes removal easier and safer. Step 3: Inspect and Clean Thoroughly Clean the bearing seat and spindle shaft with a lint-free cloth and approved solvent. Check for scratches, dents, or corrosion on all mating surfaces. If damage is found, repair or replace the spindle shaft—imperfect surfaces will compromise the performance of new bearings. Step 4: Heat the New Bearing Heat the replacement bearing evenly to 80–100°C using a bearing heater or clean oil bath. This causes the inner ring to expand slightly, allowing for a smooth, interference-free fit. Step 5: Install and Apply Preload Quickly slide the heated bearing onto the shaft. Use a proper installation sleeve to apply steady, even pressure—never strike the bearing directly with a hammer. Apply the correct preload based on your application: fixed-position preload is ideal for stable high-speed operation, while constant-pressure preload works better under varying speeds or temperatures. Always follow the OEM or bearing manufacturer’s specifications. Step 6: Lubricate Properly Select grease or oil according to the spindle’s requirements. For grease, fill only 30% to 40% of the bearing’s free space—over-packing causes churning and excessive heat. For oil-air or oil-mist systems, strictly follow the manufacturer’s guidelines for flow rate and lubrication intervals. How to Verify Correct Installation A proper installation ensures long service life and optimal performance. Confirm success with these checks: Manual Rotation Test Rotate the spindle by hand. It should turn smoothly and quietly, with no grinding, catching, or resistance. Low-to-High Speed Run-In Start the spindle at low speed, then gradually increase to normal operating speed. Listen for unusual noises and monitor for excessive vibration. Temperature Check After running for about four hours, the outer ring of the bearing should not exceed ambient temperature by more than 35°C. Use a thermal camera if available—temperature variation across the same bearing should be less than 5°C. Final Cutting Test Perform a test cut on a sample workpiece under standard conditions. A good surface finish and accurate dimensions confirm that the bearing has been installed correctly. Why Precision Matters Spindles often operate at thousands—or even tens of thousands—of RPM. Even slight misalignment or incorrect preload can cause excess friction, rapid heat buildup, premature failure, and loss of machining accuracy. A rushed replacement may save minutes but cost hours in downtime and scrapped parts. About Beining Technology Beining Technology specializes in manufacturing high-precision spindle bearings for demanding CNC and machine tool applications. Our bearings are engineered for reliability, high-speed stability, and micron-level accuracy—trusted by manufacturers who refuse to compromise on performance.

Cross roller bearings handle radial loads, axial loads, and tilting moments all at once. They are compact and precise—commonly used in robot joints, rotary tables, medical devices, and automation equipment. Picking the wrong one can hurt performance and shorten machine life. Here is what really matters when selecting one. 1.Know Your Application First Different machines need different bearings. Robot arms need high rigidity, low friction, and small size. Rotary tables require high rotation accuracy and repeatability. Medical or lab equipment must run quietly and stay clean. Be clear about your use case—it drives every other decision. 2.Check Available Space Measure these three dimensions: shaft diameter (inner ring size), housing bore (outer ring size), and mounting height (bearing thickness). If space is tight, look for thin-section cross roller bearings like RU, XRT, or CRBH series. They save room without losing stiffness. 3.Understand Your Loads Cross roller bearings carry three types of force: radial load (side force, perpendicular to shaft), axial load (thrust along the shaft), and moment load (tilting or overturning force). Check the manufacturer’s load rating chart. Keep your actual load below 80 percent of the rated capacity for safety and long life. 4.Do Not Over-Specify Precision Common accuracy grades are P5, P4, and P2 (lower number means higher precision). For general automation, P5 is usually enough. For high-end robots or CNC turntables, go for P4 or better. Higher precision costs more—but if your machine does not need it, you are just wasting money. 5.Price Is Not Everything Cheap bearings often cut corners. Poor steel wears out fast. Inconsistent grinding causes uneven rotation. Wrong preload leads to low rigidity or noise. Look for suppliers who offer stable quality, test reports (runout, preload, etc.), and real technical support. A reliable bearing saves downtime and maintenance later.   Why Choose Beining Technology? We design and manufacture cross roller bearings for demanding applications like hollow rotary platforms, robotic joint modules, and precision indexing tables. Our advantages: 1.Standard models in stock (RU, XRB, SHF, CRBH series) 2.Custom sizes, preload, and sealing available 3.Every batch tested – reports provided 4.Engineers ready to help with selection  

  Lubricant is vital for motor bearings. It reduces friction, heat, and wear. But lubricant doesn't last forever. It can degrade, causing problems like overheating, noise, and bearing damage. Let's look at why it fails and the simple ways to check it.     Top 5 Reasons Lubricant Degrades   Heat and Air (Oxidation):​ High temperatures and exposure to air slowly break down lubricant, just like oil can go rancid. It thickens, forms sludge and acids, and loses its lubricating power. It can even clog small passages inside the bearing.                                                                                                             Water/Moisture:​ In damp locations, water gets into the lubricant. This causes rust and creates acidic by-products that attack the bearing metal, leading to faster wear and corrosion.                                  Physical Beating (Shear):​ The high-speed rolling and pressure inside the bearing physically "shears" or breaks down the lubricant's structure over thousands of hours. This can make grease too soft (causing it to leak) or too hard (causing it to cake up).                                                                 Dirt and Contamination:​ Dust, dirt, and tiny metal particles from normal operation or the environment can get into the lubricant. These contaminants act like sandpaper, increasing wear and speeding up the lubricant's breakdown.                                                                                                   Using the Wrong Type:​ Not all lubricants are the same. A lubricant meant for a slow, cool motor will fail quickly in a hot, high-speed one. Using the incorrect grease or oil for the job is a common cause of early failure.                                                                                                                                         Easy Ways to Check if Your Lubricant Has Failed                                                                                                You don't always need lab equipment. Here are four simple checks:                                                                      Look at it (Visual):​ Good oil or grease is usually clear or a light amber color. Bad lubricant looks dark, cloudy, or murky. You might see sludge or gritty particles in it.                                                               Smell it:​ Fresh lubricant has a mild, oily smell. Degraded lubricant often has a sharp, sour, or burnt odor​ – a clear warning sign.                                                                                                                Feel it (Texture):​ Rub a little between your fingers. Good lubricant feels smooth and slippery. Bad lubricant can feel gritty, sticky, or stringy. Grease might feel stiff and caked.                                      Test it (Professional):​ For critical equipment, send a sample to a lab. They measure viscosity (thickness)​ and acid level​ to scientifically confirm if it's time for a change.                                                  Key Maintenance Tip:                                                                                                                                            Don't wait for problems. Make lubricant inspection and regular, scheduled replacement​ a part of your maintenance routine. This is the best way to prevent bearing damage and keep your motors running smoothly for longer.   Beining Technology​ specializes in manufacturing high-precision machine tool spindle bearings, providing reliable solutions for your equipment.

  Angular contact ball bearings are widely used in motors, spindles, pumps, and many industrial machines. They can handle both radial and axial loads because of their angled raceway design. But to work properly, they must be installed in the correct direction. Installing them backwards is a common mistake that can cause early failure. Here’s how to tell the front from the back—and why it matters. How to Identify Front and Back 1.Look at the markings The side with the full brand name and part number stamped on the outer ring is usually the back. This side often faces a fixed shoulder in the housing. The cleaner, unmarked side is the front, which should face the main thrust load direction. 2.Compare the ring heights Place the bearing on a flat surface and look at it from the side. The back side has taller and thicker edges on both the inner and outer rings. The front side has shorter, thinner edges. The contact angle opens toward the front. 3.Check for seals or shields If the bearing has a rubber seal (RS) or metal shield (Z) on one side, that sealed side is usually the front. The seal is designed to face the direction where protection from dust or moisture is needed. 4.For matched pairs Some angular contact bearings are sold as matched sets for back-to-back or face-to-face mounting. These often have small marks like an arrow, a “V”, or a dot. These marks point to the front. Make sure to align them correctly based on your mounting arrangement. Why Correct Orientation Matters Installing the bearing in the wrong direction changes how loads are transferred. The contact angle is designed to guide force in one specific way. If reversed, the load hits the wrong part of the raceway, causing: Uneven stress on balls and raceways Rapid wear and overheating Excess noise and vibration Shortened bearing life—sometimes just hours in high-speed applications In precision equipment like machine tool spindles, wrong orientation also reduces rigidity and accuracy, affecting the whole machine’s performance. Always double-check the orientation before final assembly. A quick visual check can prevent costly downtime and repairs.   About Beining Technology Beining Technology manufactures high-precision angular contact ball bearings for spindles, motors, and industrial automation. We focus on quality, consistency, and technical support to help customers avoid common installation issues. If you have questions about bearing selection or mounting, feel free to contact our team.

Magnetic suspension backup bearings (also called catcher or protection bearings) are a critical safety component in magnetic levitation systems. They provide mechanical support to the rotor during power loss or system failure, preventing rotor-stator contact and catastrophic damage in equipment like maglev blowers and turbo-machines. Common Types Used as Backup Bearings 1.Angular Contact Ball Bearings These are widely used due to their high-speed capability and axial load capacity. Common series include 70 and 72. Specialized models such as CXFSV71905ACQQ/P4ADFLTB, CXFSV71907ACQQ/P4ADFLTB, and CXFSV71908ACQQ/P4ADFLTB are designed for impact resistance and stable run-down performance. 2.Deep Groove Ball Bearings Thin-section types from series like 618 or 819 are used where space is limited. Examples include CXFV61909QQ/P4ALTB and CXFV61910QQ/P4ALTB, which offer reliable backup support for high-speed rotors. Key Selection Guidelines 1.Prioritize impact strength The bearing must survive the sudden drop of the rotor. Standard bearings may fail instantly under shock loads. Choose bearings specifically engineered for high impact resistance. 2.Address lubrication during standby Backup bearings often remain idle for long periods, leading to grease degradation. Use specialty greases for long-term storage or apply solid lubricant coatings (e.g., PTFE or DLC) on bearing surfaces. 3.Match design to application needs Options include full-complement (no cage) for higher load capacity, hybrid ceramic balls for reduced heat, or standard steel for cost efficiency. Select based on expected drop events, system dynamics, and budget—not one-size-fits-all assumptions. 4.Apply corrosion protection Stationary bearings are prone to rust. Anti-corrosion coatings (such as zinc or nickel) on rings help maintain readiness and extend service life. 5.Balance precision and cost High precision (e.g., P4, ABEC 7) improves coast-down smoothness but increases cost. For most backup roles, moderate precision that meets functional requirements is sufficient and more economical. Conclusion Selecting the right backup bearing requires understanding your system’s failure mode and operational environment. Partner with a manufacturer experienced in magnetic suspension applications to ensure reliability without overspending.

  A precision machine tool spindle relies on its bearings for smooth, accurate, and high-speed rotation. One common issue that can disrupt performance is axial play, also called end play, where the spindle shaft moves back and forth along its axis. This movement reduces machining accuracy and can lead to spindle damage. Why Does Axial Play Happen? Axial play occurs when the bearing is not held firmly in place. Common causes include: Insufficient preload: The bearing was not tightened enough during assembly, leaving too much internal clearance. Incorrect installation: Misalignment, loose lock nuts, or missing washers can allow the bearing to shift. Bearing wear: Over time, rolling elements and raceways wear down, increasing clearance. Spindle or housing damage: Worn shafts or damaged housing bores create space for movement. How to Solve and Prevent Axial Play 1.Check and correct installation Verify that lock nuts are properly tightened, spacers and washers are in place, and the bearing is correctly aligned on the shaft and in the housing. Measure axial clearance with a dial indicator and adjust using precision shims to meet manufacturer specifications. 2.Apply proper preload Follow the manufacturer’s guidelines for preload. Use precisely ground spacers, calibrated lock nuts, or spring preload systems to maintain consistent preload—especially important for high-speed or thermally sensitive applications. 3.Inspect and replace worn parts Replace bearings showing signs of wear such as noise, heat, or rough rotation. Also check the spindle shaft and housing for damage. Use only high-precision bearings designed for spindle applications. 4.Use the right locking method Secure the bearing axially with reliable methods such as precision lock nuts with locking washers, thread-locking adhesive on clean threads, or preload sleeves for paired bearings. Prevention Is Key Always follow correct installation procedures. Use high-quality, precision-grade replacement parts. Select the appropriate bearing type and preload for your operating speed and load. Perform regular maintenance to catch early signs of wear. Need Help with Your Spindle? Persistent axial play often indicates worn components or improper setup. Using the correct high-precision bearings is essential for spindle stability and longevity. Beining Technology specializes in manufacturing high-precision machine tool spindle bearings. Our products are designed for maximum rigidity, accuracy, and long service life, helping to eliminate issues like axial play. Contact us to find the right bearing solution for your application.

  If your water pump bearings keep failing, you’re not alone—and it’s rarely just “bad luck.” Most failures happen for the same few reasons. The good news? They’re almost always preventable. Common Causes of Early Bearing Failure 1.Misalignment or unbalanced impeller Even a small misalignment between the motor and pump shaft puts extra load on the bearings. This causes vibration, heat, and rapid wear. 2.Wrong or poor lubrication Too little grease = metal-on-metal friction. Too much = overheating. Old or dirty grease loses its protection. All lead to early failure. 3.Water or dirt getting inside Worn seals let in water, dust, or grit. These act like sandpaper inside the bearing—causing pitting, rust, and surface damage. 4.Rough or incorrect installation Hammering a bearing onto a shaft, using the wrong tools, or uneven pressure can crack or deform it before it even runs. 5.Low-quality bearings Cheap bearings often use softer steel or looser tolerances. They wear out faster—even under normal conditions. Simple Ways to Make Bearings Last Longer Align properly: Always check shaft alignment after installation or repair. A laser tool helps, but even basic checks make a big difference. Lubricate right: Use the grease type and amount your pump manual recommends. Clean the fitting before adding new grease. Check seals regularly: Replace leaking or cracked seals early. In wet or dirty areas, consider better seals (like double mechanical types). Install with care: Use an induction heater—not a torch or hammer—to mount bearings. Never force them. Listen to your pump: Grinding noise? Hot housing? Excess vibration? Shut it down and check—don’t wait for total failure. Start with quality: A genuine P5 or P6 precision bearing from a known brand costs a little more upfront—but saves far more in downtime and repairs. Bottom Line Bearing failure is usually a symptom of something else—misalignment, bad grease, or poor setup—not just “the bearing went bad.” Fix the root cause, and your pumps will run longer, quieter, and more reliably. Need help choosing the right bearing or troubleshooting a repeat failure? We’ve been solving these issues for 15+ years—just ask.

  If you’ve ever tried to fit a high-performance bearing into a tight space—like a robot joint or an electric steering column—you know the struggle: you need strength in both directions, but there’s no room for two bearings. That’s exactly where four-point contact ball bearings come in. At first glance, they look like regular ball bearings. But inside, the raceways are shaped differently—usually with a “gothic arch” profile. This design lets each ball touch the inner and outer rings at up to four points under load. The result? A single bearing that can handle heavy axial loads from both left and right, plus radial forces, all while staying compact. This isn’t just a small upgrade—it changes how engineers design machines. Instead of mounting two angular contact bearings back-to-back (which takes more space, more parts, and careful alignment), you can drop in one four-point contact unit and get similar performance with less complexity. For industries pushing toward smaller, lighter, and more integrated systems—like robotics, medical devices, or electric vehicles—that difference matters a lot. You’ll find these bearings in real-world applications where reliability and precision can’t be compromised. In industrial robots, they keep joints rigid during fast movements. In CNC spindles, they resist cutting forces without wobbling. Even in advanced automotive steering systems—especially steer-by-wire setups—they provide the stiffness and bidirectional support needed for safe, responsive control. That said, they’re not a one-size-fits-all solution. If your application runs at very high speeds (say, over 20,000 RPM) or demands ultra-fine runout tolerances, a matched pair of high-precision angular contact bearings might still be better. Also, proper preload is critical—too little and the bearing rattles; too much and it overheats. So it’s always worth checking specs with your supplier before finalizing the design. At Beining Technology, we’ve been supplying four-point contact bearings to automation and machinery builders for several years. We offer standard grades (P6, P5) and high-precision options (P4), all tested for smooth rotation and dimensional accuracy. No marketing fluff—just bearings that work as promised. If you’re working on a design where space is tight but loads are heavy, this type of bearing might be the simple, reliable answer you’ve been looking for.  

China’s Bearing Exports Grow in Volume, Face Price Pressure in Early 2025 November 26, 2025 According to data from China’s General Administration of Customs, the country exported 497,852 tons of bearings from January to July 2025—an increase of 7.2% year-on-year, equivalent to an additional 33,474 tons compared to the same period in 2024. However, despite the rise in shipment volume, export revenue grew only modestly—reaching **29.34billion∗∗,upjust∗∗0.92.5 billion) from last year. This reflects a notable decline in average export prices, which dropped from 630/tonin2024to590/ton in 2025. The trend continued into July 2025: China shipped 73,843 tons of bearings (up 3.2% YoY), but export value fell by