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

  Industrial robots need to be accurate, strong, and long-lasting. Choosing the right bearings helps them perform better in areas like: CNC machines Assembly lines Medical robotics Automation systems Let’s break down how to pick the best bearings for different parts of a robot. 1. Pick the Right Bearing for Each Robot Joint  Waist/Base (Axis 1) This part supports the whole robot and handles side forces. Best choices: Cross Roller Bearings (CRB) YRT Rotary Table Bearings Why? They are compact and can handle side force, pressure, and twisting all at once. Used in: ABB IRB 6700  Shoulder/Elbow (Axes 2 & 3) These joints move heavy loads and bend under stress. Best choices: Harmonic Drive Bearings (thin CRB or angular contact) Tapered Roller Bearings (for very heavy loads) Why? They help carry heavy weight and resist bending. Used in: KUKA KR QUANTEC  Wrist Joints (Axes 4, 5, 6) These need to move fast and precisely. Best choices: Matched Angular Contact Ball Bearings (DF/DB pairs) Thin-Section Ball Bearings (for lighter robots like cobots) Why? They offer high speed and accuracy in small spaces. Used in: Yaskawa Motoman, UR10e  Linear Motion (e.g., SCARA Z-axis) Some robots move straight up and down. Best choices: Ball or Roller Linear Guides (for high precision, e.g., THK SR series) Linear Bushings (for simpler, lower-cost designs) Why? They allow smooth and accurate linear movement. 2. What Else to Consider When Choosing Bearings? Factor What to Look For Load Type Use roller bearings for heavy loads, ball bearings for lighter ones Precision High-tech applications (like medical or semiconductors) need P4/P2 grade bearings Speed Angular contact ball bearings with ceramic balls work best for fast motion Stiffness Preloaded bearings reduce flexing and improve accuracy Environment Choose stainless steel for cleanrooms, sealed types for dust/water, special materials for heat Life Span Aim for a bearing life of at least 20,000 hours. Use high-quality steel (GCr15), hardened to HRC 58–62 3. Other Important Things to Know Lubrication: Use grease for normal speeds, oil-air systems for high-speed use Seals: Good seals keep dirt out and oil in. Balance sealing with low friction Installation: Precise mounting (within 0.005mm alignment) and correct preload are key Monitoring: Add sensors to check vibration and temperature for early warning signs   Why Work With Us,Beining Technology? We help you: Understand your robot’s needs (speed, load, accuracy) Get help with installation, lubrication, and setup Keep your robots running longer with fewer breakdowns Let us help you improve your robot’s performance, precision, and lifespan. Contact us today for expert advice on industrial robot bearings!  

  Ball screw bearings (also called ball screw assemblies,ball screw support bearings) are key parts that turn rotating motion into smooth, accurate straight-line motion — or the other way around. They work much better than older types of screws because of these important features: High Efficiency: They use rolling instead of sliding, which creates far less friction. This makes them 90–98% efficient, so they waste less energy and save power. 1. Very Precise: Made with great care in controlled factories, they offer excellent accuracy — as close as ±0.005 mm — and can repeat the same movement within ±0.003 mm. You can choose from different quality levels, including high-precision ground screws. 2. Smooth and Sensitive Movement: The rolling balls prevent jerky motion, allowing for smooth starts and stops, even at very slow speeds. 3. Strong and Stiff: By using special preloading methods, engineers can remove any looseness (backlash), making the system stiff and more accurate, especially under heavy loads. 4. Long-Lasting: Made from hard materials (HRC 58–62), they wear down slowly and can last 5–10 times longer than regular screws with little need for maintenance. 5. Can Move in Both Directions: They work well whether turning into motion or motion into turning. (Note: In vertical setups, extra parts may be needed to prevent unwanted movement.) 6. Great for High Speeds: Because they create little heat and resistance, they can move faster than many other systems. 7. Flexible and Standardized: They come in many sizes, lengths, and precision levels. It’s easy to fit them into machines, and they can be customized for specific needs. Why Choose Ball Screws? Ball screw bearings are the top choice when you need exact movement, high efficiency, and long life. They are used in many high-tech areas, such as: CNC machine tools (for X/Y/Z movements) Industrial robots (like robotic arms) Equipment for making computer chips Medical imaging and robot-assisted surgery Factory automation systems With their mix of accuracy, strength, and durability, ball screws are essential for modern, high-performance machines. If you have questions or need more information,please contact Beining Technology.  

When installing precision bearings in machine tools, you’ll often find thin metal rings nestled between the paired bearings. These small but essential components — known as spacer rings, distance sleeves, or adjustment rings — play a vital role in achieving optimal spindle performance. Let’s explore why spacer rings are so important and how they contribute to the accuracy, stability, and longevity of your machine tool bearings. 1. Precision Tuning for Peak Performance Think of spacer rings as precision shims that fine-tune your bearing setup. With thickness tolerances often within ±0.005 mm, they allow engineers to: Optimize Preload: Apply the perfect amount of axial force to eliminate bearing play, improving rigidity and reducing vibration — especially critical during high-speed machining. Adjust Internal Clearance: Fine-tune the gap between bearing components to compensate for thermal expansion or heavy loads, helping to prevent early wear and failure. 2. Alignment & Load Distribution High-quality spacer rings have perfectly parallel, ground surfaces that ensure: Accurate Bearing Positioning: Keeps inner and outer rings precisely aligned, preventing misalignment-related issues. Even Load Sharing: Distributes forces evenly across both bearings in a pair, avoiding uneven stress and extending bearing life. This is especially important in applications where consistent performance and long service life are crucial. 3. Simpler Assembly, Smarter Savings Using precision spacers simplifies the assembly process and reduces overall costs by: Compensating for Tolerances: Absorbing minor dimensional differences in shafts or housings. Reducing Machining Costs: Allowing less tight tolerances on surrounding parts without compromising performance. Making Maintenance Easier: Enabling quick bearing replacement without needing to re-machine key components. 4. Thermal & Stability Control In demanding environments like high-speed machining: Specialized Spacers (such as elastic or tapered designs) can absorb thermal growth caused by heat buildup. Material Choice Matters: Steel spacers are ideal for heavy-load applications. Aluminum spacers reduce weight and inertia in high-speed spindles. These choices help maintain performance consistency under varying conditions.  When Do You Need Spacer Rings? While some modern bearing pairs come with preset preload, spacers remain essential in: Custom spindle designs High-load or high-speed configurations Applications requiring precise internal clearance adjustments Retrofitting or repairing older equipment Pro Tip: Always match the precision of your spacer ring to your bearing grade. A P4-grade bearing deserves a spacer with flatness and parallelism within ≤ 0.003 mm! Maximize Your Spindle’s Potential At Beining Technology , we specialize in engineering precision spacer rings designed to unlock the full potential of machine tool bearings. Our team ensures each spacer is built for: Exact preload control Thermal stability Seamless integration with your bearing pairs Whether you're building new spindles or upgrading existing systems, our spacers help you achieve greater accuracy, speed, and durability. Contact us today to learn more about our custom spacer solutions tailored to your specific application needs!

  Selecting the correct precision grade for paired angular contact bearings is essential for achieving optimal performance, accuracy, and longevity in machine tools. This guide will help you make an informed decision based on your application needs. 1. Understanding Bearing Precision Grades (P-Codes) Precision grades define the manufacturing tolerances and running accuracy of bearings. The most common standards are: P0 / P6: Standard or medium precision. Suitable for general-purpose machines with lower accuracy demands. P5: Precision grade. Offers better accuracy and stability. Commonly used in CNC machining centers and lathes. P4 / P2: High or ultra-high precision. Required for high-speed spindles, grinding machines, and applications needing micron-level accuracy. Tip: Higher precision means higher cost — only choose what your application truly requires. 2. Match Precision to Your Machining Needs Task Type Recommended Grade Why Roughing / Heavy Cutting P0 or P6 Cost-effective for low-accuracy jobs Semi-finishing / General CNC Work P5 (Recommended) Best balance of performance and value Finishing / Micron-Level Tolerances P4 or P2 Needed for high-precision grinding and aerospace parts 3. Consider Speed and Stability Requirements High-Speed Spindles: Require P4 or P2 bearings to reduce heat, vibration, and centrifugal forces at high RPMs. Lower Speeds / Stable Conditions: P5 usually provides sufficient accuracy and reliability. Bearings alone can’t guarantee performance — they must be supported by high-quality spindle components. 4. Supporting Components Matter Too! Even the highest-grade bearing won’t perform well if installed improperly. Ensure that: Shaft and housing have matching precision and surface finish Spacers and locking nuts are precisely machined Proper installation techniques are followed Remember: Precision starts from every component — not just the bearing itself. 5. Balance Performance and Cost P5 Bearings: Ideal for most CNC machine tools — offers excellent performance at a reasonable cost. P4/P2 Bearings: Justify the cost only when ultra-high speed or extreme accuracy is required. Avoid over-specifying — it adds unnecessary cost without real benefit. Final Tips: How to Choose the Right Precision Define your required output: surface finish, tolerance levels, etc. Know your spindle speeds and load conditions. Start with P5 precision — it’s the standard for most machine tool applications. Upgrade to P4/P2 only when high speed or ultra-fine tolerances are critical. Ensure all mounting components match the bearing's precision level. Ask an expert if unsure — proper selection avoids costly mistakes. Partner With Us for Expert Bearing Solutions Beining Technology specializes in high-performance angular contact bearings for machine tools. With over a decade of experience, we offer tailored solutions to meet your specific requirements — including precision, speed, and load capacity. Contact our technical team today to optimize your spindle performance and extend bearing life!

  Overheating is a common problem in paired angular contact bearings that can reduce performance, shorten lifespan, and even cause equipment failure. Below are the main causes and practical solutions to help prevent overheating. 1. Lubrication Problems Causes: Too little grease → leads to dry friction. Too much grease → increases resistance and heat from churning. Wrong viscosity → high-viscosity oils increase friction at high speeds. Contaminated grease → dust, moisture, or debris reduces lubrication quality. Solutions: Use the manufacturer-recommended lubricant (e.g., low-viscosity oil for high-speed applications). Clean bearings and replace contaminated grease regularly. Upgrade to better seals to prevent contamination. 2. Installation Errors Causes: Incorrect preload: Too much → increases internal friction. Too little → causes vibration and uneven load. Misalignment: shaft/housing not aligned properly → uneven stress. Improper fits: Too tight → eliminates clearance. Too loose → causes slippage ("creep"). Solutions: Set proper preload using torque measurements or thermal methods. Check alignment with dial indicators (

  What is Bearing Preload? Bearing preload is the controlled application of axial force to remove internal clearance. This improves performance by increasing stiffness, reducing vibration, and extending bearing life — especially important in high-precision applications like machine tool spindles and small motors. 1. Machine Tool Spindles Why Use Preload? Better Stiffness: Prevents movement under cutting forces for more stable machining. Higher Accuracy: Helps achieve tight tolerances (e.g., micrometer-level precision). Less Vibration & Noise: Reduces chatter, improving surface finish quality. Supports High Speeds: Allows stable operation at high RPM (e.g., CNC machines). Common Preload Methods: Fixed Preload: Uses spacers for constant pressure; good for low-speed, high-precision tools. Elastic Preload: Uses springs or washers to adjust for temperature changes. Thermal Preload: Uses heat expansion differences during operation; no manual adjustment needed. 2. Small Motors Benefits of Preload: Precise Motion Control: Eliminates play in servo or stepper motors. Stable Rotation: Reduces rotor wobble in high-speed tools like drones or power tools. Longer Life: Even load distribution reduces wear over time. How It’s Applied: Angular Contact Bearings: Paired in back-to-back or face-to-face setups. Spring-Loaded Systems: Adjust automatically with temperature or mechanical change. Nut or Wave Washer Methods: Simple and cost-effective for smaller appliances. 3. Best Practices Use the Right Force: Too much preload causes overheating; too little leads to instability. Check After Installation: Make sure bearings rotate smoothly with slight resistance. Choose the Right Bearings: Look for adjusted internal clearance (e.g., C3/C4) for better performance. Conclusion Bearing preload plays a key role in optimizing performance across many applications. Whether in high-precision machine tools or compact motors, the right preload method improves accuracy, stability, and lifespan. Choosing between fixed, elastic, or thermal methods depends on your operating conditions and design needs. Regular maintenance and proper setup are essential to keep systems running efficiently.

  Angular contact precision bearings are vital for high-performance machinery. To assess whether they can remain in service, follow this inspection process:     1. Visual Inspection Check for visible signs of damage: Cracks or chips on rings, rollers, or cages — replace immediately. Component separation — indicates failure. Surface damage like deep scratches, dents, or brinelling (indentations). Corrosion or pitting — leads to rapid wear. Cage wear — loose rivets or broken sections reduce stability. Seal damage — allows contamination and grease loss in sealed bearings.     2. Operational Testing Test bearing performance during operation: Smooth rotation: Any resistance or grinding suggests damage or contamination. Noise: Unusual sounds (e.g., clicking, screeching) may indicate wear or misalignment. Temperature: Overheating (e.g., >60°C) often signals poor lubrication, friction, or overload.     3. Advanced Diagnostics Use tools for deeper analysis: Vibration analysis: Detects early-stage faults such as spalling or fatigue. Oil film testing: Evaluates lubricant quality and wear trends. Fiber optic sensors: Monitor real-time wear and internal conditions in precision systems.     4. Usage and Environment Review Consider historical and environmental factors: Load and speed history: Heavy use shortens lifespan. Operating conditions: Dust, moisture, and temperature affect performance. Maintenance records: Frequent issues may point to system problems.     Maintenance Tips Regular inspections: Monthly checks for heavy-use systems. Proper lubrication: Use correct grease type and quantity. Preload adjustment: Maintain proper stiffness and eliminate clearance.     Conclusion To decide if angular contact bearings are still usable, combine visual checks, functional tests, and diagnostics. Early detection of damage prevents breakdowns and extends machine life. For critical applications, work with certified suppliers for reliable replacements and support.  

Spindle bearings are key to the precision and performance of CNC lathes. Their accuracy depends on two main factors: Rotational accuracy: radial/axial runout of rings Dimensional accuracy: inner/outer diameter tolerances Here are the main factors that affect bearing accuracy: 1. Manufacturing Errors Raceway roundness errors cause uneven load, vibration, and wear. Surface roughness or waviness affects lubrication, wear, and stability — especially at high speeds. 2. Assembly Issues Misaligned shafts or housings deform raceways and reduce stiffness. Incorrect preload or clearance leads to instability, friction, and heat. Non-perpendicular mounting surfaces cause tilting and uneven loading. 3. Design and Material More rollers reduce runout, but with diminishing returns. Larger radial clearance increases runout. Poor heat treatment causes early wear and hardness loss. 4. Operating Conditions Heat from friction changes dimensions and affects preload. Poor lubrication increases wear and noise; too much grease causes overheating. Dynamic loads (e.g., cutting forces) increase stress and reduce life. Tips for Better Accuracy Use high-precision bearings with low roughness and waviness. Ensure correct alignment and controlled preload during installation. Choose suitable materials and lubrication for your application. Monitor temperature, vibration, and wear regularly. Summary To keep spindle bearings accurate: High-quality manufacturing Proper assembly Suitable design and materials Good maintenance practices

  Selecting the correct spindle bearings is essential for ensuring high precision, long service life, and optimal performance in grinding machines. This guide outlines the key criteria and best practices for choosing the most suitable spindle bearings based on your specific grinding application.   Key Factors in Bearing Selection   1. Speed & Temperature Control   Grinding machines often operate at high speeds, generating significant heat that can affect bearing performance and longevity.   Recommendation:   Use ceramic hybrid bearings (steel rings with silicon nitride Si₃N₄ balls) or full ceramic bearings for their low thermal expansion, reduced friction, and excellent heat resistance. These are ideal for high-speed internal grinders and other applications where thermal stability is critical.   2. Load Capacity   Different types of grinding machines impose various load conditions on the spindle system.     Radial Loads:    For heavy radial loads, such as those experienced in roll or gear grinding machines, cylindrical roller bearings are the preferred choice.      Axial or Combined Loads:    For combined radial and axial loads, select angular contact ball bearings (ACBBs) or tapered roller bearings, which offer reliable support under bidirectional forces.   3. Precision Requirements   In high-precision grinding (e.g., surface, cylindrical, or coordinate grinding), maintaining micron-level accuracy is crucial.      Recommended Precision Grades:    Use P4 or P2 grade bearings for ultra-high precision applications.        Runout Tolerance:    Ensure radial and axial runout values remain below 2 μm for optimal machining accuracy.   4. Stiffness & Vibration Resistance   Spindle rigidity and vibration damping significantly impact grinding quality and tool life.     Solution:    Apply preloaded angular contact bearings to increase stiffness and reduce vibration.        Advanced Option:    Consider hydrostatic or aerostatic bearings for ultra-smooth operation and superior damping characteristics in CNC and ultra-precision grinding machines.   5. Noise Reduction   Minimizing operational noise is important, especially in controlled environments and automated systems.   Recommendation: Select bearings with polished raceways and optimized internal geometry to reduce noise and improve running smoothness.       Top Bearing Types for Grinding Machine Spindles Bearing Type Key Advantages Typical Applications Angular Contact Ball Bearings High speed (dn ≤ 1.5 million), bidirectional load capacity Surface grinding, tool and cutter grinding Ceramic Hybrid Bearings Ultra-high speed (dn ≤ 2 million), minimal heat generation High-speed internal grinders Hydrostatic Bearings Zero wear, ultra-stiff, no metal-to-metal contact Precision CNC and jig grinding Cylindrical Roller Bearings High radial load capacity, stable at medium speeds Roll grinding, gear grinding     Configuration & Mounting Recommendations   Bearing Pairing Arrangements Back-to-Back (DB): Enhances axial rigidity and is ideal for handling bidirectional axial loads. Tandem (DT): Suitable for unidirectional heavy axial loading scenarios. Face-to-Face (DF): Offers self-aligning capabilities and accommodates thermal expansion. Lubrication Options Grease Lubrication: Best for low-speed operations (≤ 5,000 rpm). Oil-Air / Oil-Mist Lubrication: Recommended for high-speed spindles (≥ 10,000 rpm) to ensure effective cooling and lubrication. Preload Adjustment   Applying the right amount of preload eliminates internal clearance and improves spindle stiffness.   Standard Preload Range: Apply 1–3% of the bearing’s dynamic load rating (C) for optimal performance.       Maintenance Best Practices   Proper maintenance extends bearing life and prevents costly downtime.   Temperature Monitoring: Keep operating temperature below 65°C under normal ambient conditions (25°C).     Vibration Monitoring: Replace bearings if vibration levels increase by more than 20%, or if surface roughness exceeds Ra 0.2 μm.     Condition Monitoring Systems: Implement predictive maintenance using sensors and condition monitoring tools to forecast bearing failure before it occurs.     Conclusion For grinding machine spindles, angular contact ball bearings and ceramic hybrid bearings are among the top choices, offering a balance of speed capability, precision, and load-handling performance. Always align your bearing selection with the specific operational demands—such as speed, load type, and required precision—and follow strict installation and maintenance protocols to maximize spindle reliability and machine uptime.     Pro Tip: When selecting bearings for custom or high-performance grinding applications, consult with a qualified bearing engineer or technical support team to ensure compatibility with your spindle design and working conditions.  

  Angular contact ball bearings are widely used in precision machinery due to their ability to support combined radial and axial loads. When installed in pairs, their performance and service life critically depend on correct installation techniques. This guide outlines the essential steps and best practices for installing paired angular contact ball bearings to ensure optimal functionality, rigidity, and longevity. 1. Pre-Installation Preparation Clean Components Thoroughly clean the bearings, shafts, housings, and adjacent components using an appropriate solvent (e.g., mineral spirits or specialized degreasing agents) to remove contaminants such as grease, metal debris, or dust.   Inspect for Defects Check bearings for signs of rust, cracks, or mechanical damage. Examine the shaft and housing surfaces for smoothness, dimensional accuracy (roundness, cylindricity), and proper tolerances.   Measure Dimensions Use micrometers or calipers to verify shaft diameter, housing bore size, and geometric tolerances. Ensure that interference or clearance fits align with design specifications.   Apply Lubrication Select the appropriate lubricant (grease or oil) based on operating conditions (speed, temperature, load). Fill approximately 1/3 to 1/2 of the bearing’s internal free space to prevent overheating due to excessive lubricant churning. 2. Bearing Pairing and Orientation Angular contact ball bearings are typically mounted in pairs to accommodate axial loads in one or both directions. The three common mounting arrangements are:   Back-to-Back (DB) Ideal for applications requiring high rigidity and resistance to moment loads, such as machine tool spindles. Bearings are mounted with their wide outer ring sides facing outward.   Face-to-Face (DF) Suitable for precise alignment situations where thermal expansion must be accommodated. Bearings are mounted with narrow inner ring sides facing each other.   Tandem (DT) Used when larger unidirectional axial loads are present. Bearings are aligned in the same direction to share the load equally.   Tip: Always align the contact angle with the expected direction of the axial load. 3. Installation Procedures A. Single Bearing Installation Thermal Expansion Method (Recommended for Interference Fits): Use an induction heater or oil bath (maximum temperature: 120°C) to evenly heat the bearing. Avoid direct flame heating. Immediately mount the heated bearing onto the shaft while it is expanded.   Mechanical Press Fit: Use a press with a soft-metal sleeve to apply even pressure across the raceway. Never strike the bearing directly with a hammer or hard object. B. Paired Bearing Installation Back-to-Back (DB): Install the first bearing so its inner ring contacts the shaft shoulder. If required, insert a spacer between the two bearings to maintain desired preload. Install the second bearing with the wide side aligned to match the first. Face-to-Face (DF): Follow similar steps but align the narrow sides of the inner rings together. Tandem (DT): Mount both bearings in the same orientation to allow for sequential load transmission under unidirectional loading. C. Housing Assembly Ensure that the housing bores are concentric with the shaft to avoid misalignment. For split housings, tighten fasteners gradually and monitor shaft runout using a dial indicator. 4. Preload and Clearance Adjustment Proper preload ensures optimal stiffness and minimizes vibration and deformation.   Preload Methods: Shim Adjustment: Place shims between the housing and bearing to adjust preload precisely. Nut Tightening: Use locknuts to compress the inner rings, then secure with a locking washer. Spring Preload: Employ springs to apply a constant force, allowing for compensation during thermal expansion. Clearance Check: Measure axial and radial play using a dial indicator or feeler gauge. In high-precision applications (e.g., CNC spindles), axial clearance should typically not exceed 15 μm. 5. Post-Installation Verification Manual Inspection Rotate the shaft by hand and check for smooth operation and any abnormal resistance.   Run-In Test Operate at low speed for 5–10 minutes, then gradually increase to full operating speed. Monitor temperature (surface temperature should not exceed 65°C at 25°C ambient) and noise levels. Abnormal sounds (e.g., grinding or knocking) may indicate misalignment, insufficient lubrication, or contamination. Dimensional Accuracy Verify radial and axial runout using a dial indicator. High-precision applications (e.g., machine tool spindles) often require total indicated runout (TIR) of less than 5 μm. 6. Key Considerations Avoid Mixing Bearings: Always use bearings from the same batch and manufacturer to maintain pairing integrity. Anti-Corrosion Measures: Wear gloves when handling bearings to prevent corrosion caused by perspiration. Tool Safety: Use dedicated tools (e.g., induction heaters, hydraulic presses, soft sleeves) to avoid damaging the bearings. Documentation: Record all installation details—such as bearing model, preload values, and installation date—for future maintenance tracking. Conclusion Correct installation of paired angular contact ball bearings is crucial for achieving high precision, rigidity, and long service life. By following this guide and adhering to manufacturer recommendations, operators can maximize performance and minimize unplanned downtime.   For complex installations, troubleshooting, or application-specific advice, please consult our technical support team for tailored assistance.