Quality Precision Ball Bearings & Angular Contact Ball Bearings Manufacturer

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.