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

Bearing discoloration — such as brown, blue, or purple marks — is a serious warning sign in electric motors. Ignore it, and you risk unexpected breakdowns and costly repairs. Here’s what causes it and how to prevent failures. Top 3 Causes of Bearing Discoloration 1. Lubrication Problems (Most Common) Too little grease: Starves bearings, causing metal-on-metal friction. Wrong grease type: Standard grease breaks down under high heat or high-speed operation. Old or contaminated grease: Dirt or moisture makes grease gritty and ineffective. Warning Sign: Bearing temperature above 70°C (158°F) 2. Installation Mistakes Forced fitting: Using hammers or improper tools can damage bearings during installation. Shaft misalignment: Creates uneven pressure and premature wear. 3. Electrical Damage Voltage leakage from VFDs or motor windings can cause micro arcing, which burns bearing surfaces and leads to fluting or discoloration. Simple Prevention Checklist Risk Area Action to Take Lubrication • Fill bearings ⅓–½ full • Use heat-resistant grease for high-temperature environments • Inspect and replace grease annually Installation • Avoid hammering bearings into place • Ensure proper shaft and housing alignment Electrical • Install grounding brushes • Use insulated bearings when working with VFDs Monitoring • Monitor bearing temperature monthly • Listen for unusual grinding or noise Prevent early bearing failure with the right design, maintenance, and quality components. Beining Technology – Dedicated to motor bearing production for more than a decade With over 10 years of experience in manufacturing electric motor bearings, we provide high-quality, durable solutions for industrial applications worldwide. From deep groove ball bearings to insulated and high-speed models, our products are built to perform reliably under demanding conditions. Contact us today to find the right bearings for your motor systems!

  The electrospindle is one of the most critical components in a CNC grinding machine. It combines the motor and spindle into a single, high-precision unit that directly affects machining accuracy and surface finish quality. Below is a practical troubleshooting guide for common electrospindle problems — written in a clear, easy-to-follow format, based on real-world experience. 1. Spindle Won’t Rotate (Startup Failure) Symptoms: Motor doesn’t turn when starting up; may trigger overload alarms. Possible Causes: Broken drive belt or machine stuck in neutral. Power issues — missing phase, wrong wiring, incorrect voltage. No signal from the control system to start the spindle. For inverters — wrong parameter settings or signal input failure. How to Fix: Check the drive belt and mechanical transmission. Replace if damaged. Use a multimeter to test the 3-phase power supply. Make sure the phase sequence is correct. Confirm whether the control system is sending the correct output command. Inspect relays, contactors, fuses, and thermal protectors in the main circuit. If using an inverter, double-check its settings and verify the analog voltage signal from the CNC controller. 2. Abnormal Vibration & Noise Symptoms: Unusual noise during operation, noticeable vibration, poor surface finish with visible chatter marks. Common Causes: Worn, loose, or improperly preloaded bearings (most common cause). Loss of balance in rotor or toolholder. Damaged gears, couplings, or belts. Contaminated or worn-out pulleys. Toolholder taper mismatch or damage. Foreign objects inside the spindle. How to Fix: Start by checking the bearings. Listen for unusual sounds, check runout, and replace them if necessary — always in matched pairs. Perform dynamic balancing on the rotor and toolholder (aim for G1.0 or better). Repair or replace damaged gears, couplings, or belts. Inspect the toolholder taper (e.g., HSK or SK interface). Refinish if needed (runout should be ≤ 0.01mm). Clean out any debris inside the spindle housing. 3. Overheating (High Temperature) Symptoms: Spindle gets hot to the touch, temperature alarm triggered (usually above 70–80°C). Main Causes: Cooling system failure — low flow, clogged lines, or faulty pump. Poor bearing lubrication — wrong grease type, insufficient amount, or dirty oil. Excessive bearing preload. Long-term use of damaged bearings causing friction heat. Motor overload due to aggressive cutting parameters or improper VFD settings. How to Fix: Flush and refill the lubrication system. Use high-quality grease like NLGI 2 lithium complex. Service the cooling system — refill coolant at the right concentration, clean filters, and check coolant lines and pump operation. Re-adjust the bearing preload force. Replace overheated or damaged bearings. Optimize cutting parameters to avoid continuous overloading. 4. Unstable Spindle Speed Symptoms: Speed varies significantly from setpoint (>5%), sudden stoppages during cutting. Causes: Improper VFD tuning — gain settings too high/low or unstable power. Encoder feedback issues — interference, damaged cables, or encoder faults. Mechanical binding — seized bearings or partial brake drag. Damaged drive components — loose gears or coupling. Inconsistent cutting load — uneven wheel wear or hard spots on workpiece. How to Fix: Fine-tune the VFD settings — adjust speed loop gains, filter settings, and current limits. Inspect encoder cables for damage. Ensure shielded cables are properly grounded. Manually rotate the spindle to check for free movement. Adjust or clean the brake mechanism. Check and repair any damaged gears or couplings. Dress or replace the grinding wheel and ensure it’s well balanced. 5. Tool Clamping or Unclamping Failure Symptoms: Tool can't be clamped securely or released reliably. Causes: Worn or broken disc springs (Belleville washers). Dirty, worn, or damaged collet or clamping mechanism. Incorrect or damaged pull stud length. Low hydraulic/pneumatic pressure. Short cylinder stroke or stuck piston. How to Fix: Replace disc springs. Clean or replace the collet and clamping parts. Check pull stud length and replace if incorrect or damaged. Measure and adjust hydraulic/pneumatic pressure as needed. Check cylinder stroke and make sure the piston moves freely. Maintenance Tips for Longer Life Daily: Monitor spindle temperature and noise. Check lubrication cycle. Regularly: Calibrate spindle runout and balance annually or every 1,000–2,000 hours. Change coolant regularly (e.g., every 500 hours) and clean filters. Best Practices: Avoid extreme cuts on very hard materials. Slow down before stopping the spindle. Minimize sudden stops/startups. Always use precision-balanced toolholders and grinding wheels. Important Notes Electrospindle repair requires professional tools and knowledge. Beining Technology uses dedicated calibration equipment to ensure proper assembly and performance. Recurring failures often point to deeper issues — check machine base stability, leveling (

Is your machine tool spindle running hot? Before reaching for coolant, check your bearings first. Overheating is often an early warning sign — and in most cases, it’s caused by installation mistakes. If the temperature rises more than 15°C above ambient (or total temperature reaches 40°C or higher), you likely have a bearing installation issue. Here’s how to find and fix the most common problems: Common Installation Mistakes That Cause Overheating 1. Wrong Installation Direction Problem: Installing angular contact bearings backward disrupts how forces are spread. For example, a reversed 7015C bearing can reach over 80°C in under 30 minutes. Fix: Always follow the direction shown in the manufacturer's diagram. 2. Incorrect Preload Settings Too Tight: Just 10% over the recommended preload can cause a sharp rise in friction. Too Loose: More than 15μm of clearance leads to harmful vibration. Best Practice: Use shims with 1μm precision to set the correct clearance (usually 5–10μm for high-speed spindles). 3. Improper Handling Avoid hitting metal parts directly with tools during installation. Even a tiny nick (as small as 0.5μm) can double or triple friction. 4. Using the Wrong Bearing Type Using P0-grade bearings in a 12,000 RPM spindle is a recipe for overheating. High-performance spindles need at least P4-grade bearings (with less than 3μm runout tolerance). Quick Diagnosis Guide (3-Minute Check) Visual Inspection Check that the bearing is installed in the correct direction. Use a 10x magnifier to look for scratches on the raceways. Manual Rotation Test If it feels unusually stiff → likely preload error. Grinding or clicking sounds → signs of damage or contamination. Infrared Thermography If the spindle hits 50°C after just 30 minutes of idle running, there's a serious risk of failure. Emergency Cooling & Repair Steps Immediate Fixes: Thermal fitting: Heat the housing to 120°C, cool the shaft to -40°C for a smooth fit. Reset preload: Measure displacement with a laser while tightening the locknut. Clean out contaminants: Flush the spindle with filtered kerosene. Component Damage Assessment: Damage Level Action Light scratches (≤0.3μm) Polish with diamond paste (0.5–1μm grit) Roller pitting Replace the component and flush the system Cracked raceway Replace the spindle cartridge Don’t Forget to Check Other Systems Sometimes, the problem isn’t just the bearings: Lubrication Failure: Use ISO 68 synthetic oil (not grease) for speeds above 15,000 RPM. Cooling Failure: Make sure coolant pressure stays above 0.4MPa inside the spindle. Motor Problems: Check if 3-phase current imbalance exceeds 5%. Prevent Thermal Failures Our CNC Survival Checklist helps protect your equipment: Quarterly infrared scans of spindle housings Vibration analysis during speed ramp-ups Automatic grease injection every 300 operating hours Beining Precision Solutions – Engineered Excellence Since 2013 Your spindles deserve factory-level care. With our ISO Class 7 cleanroom facilities, we help solve thermal issues permanently. Contact our bearing experts today for emergency diagnostics.

  Spindle bearings are the core component that determines the accuracy, surface finish, and lifespan of high-end CNC machines. At Beining Technology, we combine advanced materials, precision engineering, and strict quality control to deliver top-tier spindle bearing solutions. What Makes Our Bearings Stand Out? 1. Advanced Materials We use only the highest-quality materials: High-purity steels like GCr15 and SUJ2, with ultra-low impurities Ceramic alternatives (Si₃N₄) for ultra-high-speed applications (>20,000 RPM) Corrosion-resistant steel (9Cr18) for coolant-intensive environments 2. Ultra-Precise Manufacturing Our manufacturing ensures: Surface finishes down to ≤0.1µm Ra Heat treatment under controlled conditions to enhance durability Microstructure stabilization through cryogenic treatment (-196°C) 3. Nanometer-Level Quality Assurance Every bearing undergoes: Precision geometry testing using laser interferometers Rotational accuracy checks with CMMs (Coordinate Measuring Machines) Dynamic load simulation and vibration analysis 4. Cleanroom Assembly All final assembly takes place in ISO Class 7 cleanrooms, ensuring zero contamination. Special anti-vibration foundations protect against floor disturbances, guaranteeing the finest tolerances. 5. Full Digital Traceability With our digital tracking system, every bearing can be traced from raw material to final inspection — ensuring full transparency and reliability. Why Choose Beining Technology? Inspired by global leaders like FAG and NSK, we’ve developed our own advanced technologies to meet the most demanding standards: Proprietary heat treatment methods that extend bearing life AI-optimized roller profiles for stress-free performance Smart production systems that ensure consistent quality With over 10 years of experience, Beining Technology delivers precision-engineered spindle bearing solutions tailored to your unique needs. Contact our engineering team today to discuss your application-specific requirements.

  Industrial gear reducers are workhorses in manufacturing — but when issues like bearing housing wear or oil leaks occur, they can quickly lead to costly downtime and safety risks. If you're dealing with these problems on a regular basis, it's time to take action. Here’s a clear, field-tested approach to identifying root causes and fixing them — before they get worse. Why Bearing Housing Wear Happens Bearing housing damage is more than just surface wear — it affects alignment, stability, and long-term performance. Common causes include: Poor installation practices Inadequate lubrication Excessive vibration or mechanical overload Material fatigue or casting defects When left unchecked, the clearance between the bearing and housing increases, leading to misalignment and accelerated failure.  What Causes Oil Leaks? Oil leaks often start small but can escalate fast. The most common reasons include: Failed or aged seals Enlarged housing bore from wear Cracked or deformed casing Overfilled oil reservoirs or blocked breather vents These issues not only waste lubricant but also create slip hazards and increase maintenance costs.  Effective Solutions for Bearing Housing Repair Depending on the severity of the damage, here are practical ways to restore your reducer’s performance: 1. Machining and Welding (for moderate to severe cases) Precision machining after welding buildup Installing steel sleeves or bushings Thermal spray coating to rebuild worn surfaces This method gives a long-lasting fix but requires skilled labor and equipment. 2. Composite Polymer Repair (on-site, no disassembly) Use high-strength epoxy or polymer composites Apply directly to worn areas Ideal for quick repairs without taking the machine offline Great for shops looking to minimize downtime. 3. Anaerobic Sealants (for fine gaps

(Speed | Quietness | Endurance Comparison)  Quick Comparison Feature Ceramic Bearings Steel Bearings Top Speed Up to 30,000+ RPM Up to 20,000 RPM or less Heat Resistance Excellent (extreme temperatures) Requires cooling at high speeds Noise Level Very quiet (≤65 dB) Moderate noise (≥75 dB) Weight 60% lighter than steel Heavier Best For Precision & high-speed applications Cost-effective heavy-load tasks Installation Tips Ceramic Bearings: Behave like smart tires — self-adjust to temperature changes, ideal for dynamic environments. Steel Bearings: Like sturdy truck wheels — require fixed mounting with spacers for stability.  When to Choose Which? Choose Ceramic Bearings If You Need: Ultra-high speed – e.g., medical drills, dental tools, drones Silent operation – ideal for labs, 3D printers, and precision instruments Extreme temperature performance – works well in both heat and freezing conditions Choose Steel Bearings If You Need: Cost-effective solution – around 1/3 the price of ceramic bearings Heavy load capacity – perfect for industrial machinery like conveyors, cranes Moderate speed applications – such as fans, pumps, and general motors Real-World Performance Boost Case Study: Drone Manufacturer After switching to ceramic bearings: 50% less friction → 40% longer flight time   Zero lubrication needed → 60% reduction in maintenance     Why Customers Love Ceramic Bearings? “The upfront cost is higher, but they last up to 3x longer in demanding applications.”   Need Help Choosing? [Talk to our engineers] – We’ll help you match the right bearing to your machine !

  Motor bearings are among the most vulnerable components in industrial equipment. When they fail early, it leads to unplanned downtime, costly repairs, and lost productivity. As a plant manager or maintenance engineer, understanding the root causes of premature bearing failure is key to maximizing uptime and reducing costs. Here’s what you need to know — and how to avoid common mistakes. 1. Installation Mistakes (The Hidden Dangers) Improper installation is one of the top reasons for early motor bearing failure. Hammering directly on the bearing: This can damage raceways and reduce performance. Incorrect fit: Too tight → distortion; too loose → slippage and wear. Misalignment: Even slight misalignment (>1/1000) creates uneven forces that shorten life. Damaged shafts or housings: Bent parts accelerate wear and increase stress on the bearing. Fix: Use proper tools and follow manufacturer guidelines during installation. 2. Lubrication Issues (Responsible for ~75% of Failures) Lubrication is critical — but also one of the most overlooked aspects of bearing care. Wrong grease type: Using the wrong viscosity or base oil harms performance. Contamination: Dust, moisture, or metal particles destroy internal surfaces. Too much or too little grease:       Under-lubrication = direct metal contact       Over-lubrication = overheating + grease breakdown Sign of trouble: Brown or blue discoloration on rolling elements means oxidation is underway. Fix: Choose the right lubricant, keep it clean, and maintain correct quantities. 3. Operational Stress & Abuse Even the best bearings can’t survive constant abuse. Overloading: Exceeding load limits causes fatigue and spalling on raceways. Frequent starts/stops: These create micro-cracks that grow over time. Speed issues: Too fast → grease breakdown; too slow → poor oil film formation. Vibration: Unbalanced rotors or unstable foundations cause pounding damage. Fix: Operate within design limits and minimize mechanical shocks. 4. Environmental & Design Challenges Harsh environments and poor engineering choices also play a role. High temperatures: Grease breaks down above 150°C (302°F), and steel loses hardness. Corrosive atmospheres: Moisture and chemicals eat away at raceways. Electrical arcing: VFDs can cause damaging currents that etch "fluting" patterns. Wrong bearing specs: Undersized or low-quality bearings won't last. Fix: Choose corrosion-resistant materials and properly rated bearings for your environment. 5. Poor Maintenance Practices Neglect is just as dangerous as misuse. Ignoring early signs: Strange noise, vibration, or heat should never be ignored. Skipping regreasing: Dry bearings quickly seize up. Worn seals: Let contaminants inside, accelerating wear. Fix: Implement regular inspections and replace worn parts before failure occurs. The Solution: Build a Proactive Maintenance Culture Preventing early motor bearing failure isn’t rocket science — it’s about doing the basics well. What You Should Do: Train your team on proper installation, alignment, and lubrication Select the right bearings for your load, speed, and environment Protect against contamination with high-quality seals (IP66+ recommended) Monitor regularly: check vibration, temperature, and grease condition monthly What You Should Avoid: Ignoring small misalignments “because it still runs” Using generic grease in extreme conditions Delaying seal replacement until failure happens  Final Thoughts Premature bearing failure is rarely random — 90% of cases trace back to installation errors, poor lubrication, or environmental neglect. By focusing on precision fitting, proper lubrication, and proactive maintenance, you can double or even triple the lifespan of your motor bearings. Ready to Improve Bearing Reliability? With over 10 years of experience in motor bearing production, and a monthly output of over 20 million units, we specialize in delivering durable, high-performance bearings tailored to your needs. Contact our engineering team today for a free failure mode analysis and find out how we can help you reduce downtime and boost reliability.

  Think of bearings like car parts — they wear out over time. Here’s why and how to fix them without getting too technical.  Why Bearings Fail Misalignment or Vibration Bearings get knocked out of place or shake loose over time. Bad Oil Dirty, low, or old oil can’t protect metal parts from friction and heat. Dust & Moisture Dust acts like sandpaper; water causes rust — just like a rusty bike chain. Overheating Too much heat softens the metal and makes it wear faster. Spot Problems Early Catch issues before they become big (and expensive) problems: Look for metal dust around the gearbox Listen for unusual noises, especially grinding sounds Check for oil leaks or overheated casing If something feels off — it probably is. 3 Common Repair Options Compared Here's a simple breakdown of your repair options, based on damage level and downtime needs. Repair Method Best For Time Needed Pros Things to Watch Metal Ring Insert Severe damage, expensive gearboxes 1–3+ days Stronger than new, long-lasting Needs full disassembly, not cheap Metal Spray Coating Moderate wear, high-speed gears 1–2 days Durable surface, no warping Needs specialist tools, not for deep damage Repair Paste Small cracks or light wear 4–8 hours (often done onsite) Cheap, fast, no need to take apart Not for heavy loads or extreme heat, shorter life  How to Choose the Right Fix Slight wear? → Use repair paste. It’s quick and budget-friendly. Moderate wear? → Go with spray coating. Good balance between speed and strength. Serious damage? → Metal ring insert is your best bet. Need to keep running? → Pick repair paste — you’ll be back up in one shift. Save Time and Money with Basic Checks Most bearing failures are avoidable. Do these three things regularly: Monthly: Check oil level and color — like checking your car oil Quarterly: Inspect seals and gaskets — stop dirt and water getting in Listen up: New vibrations = early warning sign Key Tip: Match the repair method to the problem and how much downtime you can afford. If stopping isn't an option, paste repairs often keep machines running until the next scheduled maintenance.  Bottom Line Bearings fail because of stress, poor lubrication, or contamination. Small issues can be fixed quickly with repair paste. Big issues need more serious fixes like sleeves or coatings. The goal? Keep your gearboxes running with as little downtime as possible. Choose your fix — and keep the line moving.  

Ever wondered how industrial robots move with such speed, strength, and accuracy? A big part of the answer lies in two key components: RV reducers and the precision bearings that make them work. What Is an RV Reducer? An RV reducer is like a robot’s “power booster.” It takes the fast rotation from the motor and turns it into strong, precise movement — allowing robots to lift, weld, assemble, and more with high control. Inside the RV Reducer: Bearings at Work Precision bearings are essential inside the reducer: They support heavy loads and allow smooth motion. They help transfer power efficiently from the motor to the robot joint. They protect the system by sealing in lubrication and keeping out dust and moisture. Without high-quality bearings, the reducer wouldn’t be able to deliver the performance robots need. Bearings Across the Whole Robot Beyond the reducer, precision bearings are found throughout the robot: Accuracy: They enable micrometer-level precision, ensuring repeatable, exact movements. Strength: They handle heavy loads — from the robot arm itself to tools and workpieces. Speed: High-speed bearings allow quick, smooth motion without losing control. Durability: Designed to last in tough factory environments, resisting dirt, heat, and wear. Key Features of Robot Bearings To meet the demands of automation, robot bearings must: Offer high precision and rigidity Handle heavy loads Run smoothly with low friction Last long with minimal maintenance Resist contamination and corrosion In Summary Precision bearings may be small, but they play a big role in making industrial robots fast, accurate, and reliable. Whether inside the RV reducer or across the robot body, the right bearings directly impact performance and productivity. Need the Right Bearings for Your Robotics Application? With years of experience in precision motion solutions, we provide bearings designed for performance, durability, and precision in robotics and automation. Contact us today to find the perfect bearing solution for your needs.

  Bearing creep — also known as raceway creep — is a silent but serious issue that can lead to motor failure, costly downtime, and increased maintenance expenses. It occurs when the bearing’s inner ring slips on the shaft (inner race creep) or the outer ring rotates inside its housing (outer race creep). This hidden slippage generates heat, vibration, noise, and higher energy consumption. If left unchecked, it can result in sudden motor breakdowns, damaging connected equipment and disrupting operations. To prevent this costly problem, it's essential to understand what causes bearing creep and how to avoid it.  Why Bearings Creep: Key Causes 1. Poor Fit The most common cause of bearing creep is an improper fit between the bearing and the shaft or housing. A loose fit reduces friction and allows movement. High-speed motors often require tighter tolerances for reliable performance. 2. Improper Installation or Machining Hammering during installation, uneven heating, or incorrect press-fitting can damage components. In addition, poorly machined shafts or housings — such as those with incorrect dimensions, rough surfaces, or low hardness — increase the risk of creep. 3. Inferior Materials Soft shafts or housings wear down quickly under stress. Low-quality bearings with weak raceways offer less grip and are more prone to slipping. 4. Harsh Operating Conditions Excessive load, vibration from misalignment or imbalance, extreme temperatures due to poor cooling or lubrication, and frequent start-stop cycles all place additional stress on the bearing fit.  How to Prevent Bearing Creep  Perfect the Fit Choose the correct tolerance class (e.g., k6/m6 for shafts, H7/js6 for housings). Measure components carefully before assembly. Use proper tools like induction heaters or hydraulic presses — never hammer the bearing into place. Strengthen Surfaces Harden shafts and housings using surface treatments. Apply wear-resistant coatings where necessary. Select high-performance bearings for demanding applications. Secure the Fit Mechanically Design shafts with shoulders or locking rings to prevent axial movement. Ensure end caps and housing covers are tight and secure. Provide adequate contact length between mating surfaces. Optimize Operation and Maintenance Avoid overloading the motor. Maintain proper alignment and balance. Lubricate regularly using the correct grease or oil — typically every 2000–4000 operating hours. Monitor temperature and vibration levels closely. Set alarms if bearing temperature rises above 80°C or increases by more than 40°C. Keep cooling paths clear and ensure seals are in good condition. Repairing Creep Damage Minor Damage Rebuild worn areas using thermal spraying or plating. Fill small gaps in slightly loose fits with special adhesives. Major Damage Replace severely worn shafts or housings. Install precision sleeves to repair damaged areas. Conclusion: Prevention Is Better Than Cure Bearing creep is usually caused by a loose fit — often due to improper tolerancing, faulty installation, or harsh operating conditions. Don’t wait until your motor fails. Take proactive steps today: Get the fit right Use strong materials and proper surface treatments Install correctly Maintain regular lubrication and smooth operation Address early signs of creep quickly to avoid major breakdowns and expensive downtime.  Need Expert Help? With over 10 years of experience in motor bearing solutions, our team offers: Precision fit recommendations Premium quality bearings Surface hardening advice Contact our engineers today for a free consultation and keep your motors running strong!