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What Are YRT Bearings?

YRT Bearings are double-row crossed roller bearings specifically designed for high-precision turntable systems. They adopt a structure where double rows of rollers are arranged orthogonally at 90°, with inner and outer rings integrated with V-shaped raceways. Clearance is eliminated through preload adjustment, enabling them to simultaneously bear radial loads, bidirectional axial loads, and overturning moments. They are core components for meeting the "high rigidity + high precision" demands in the precision transmission field.

The rings and rolling elements of YRT Bearings are mainly made of GCr15 high-carbon chromium steel (surface hardness HRC 60-62) or SUS440C stainless steel (corrosion-resistant). After ultra-precision grinding, their rotational accuracy can reach P4/P2 grades, adapting to equipment requirements with inner diameters ranging from 50mm to 1200mm. As a professional bearing manufacturer, NEWBEE Transmission’s YRT Bearings, relying on the "double-row roller - integrated raceway" design, have a deformation resistance 5 times higher than ordinary turntable bearings under the same volume. Among them, standard models such as theyrt 80 bearing (inner diameter 80mm),yrt 120 bearing (inner diameter 120mm), andyrt 150 bearing (inner diameter 150mm) have become standard configurations for precision machine tools and industrial robots. The customizedyrt 460 bearing can further meet the heavy-load needs of extra-large turntables, fully demonstrating in-depth mastery of high-precision turntable bearing technology.

Features of YRT Bearings

1. Superior Composite Load-Carrying Capacity: Through the line-contact design of double-row orthogonal rollers and V-shaped raceways, YRT Bearings can simultaneously bear radial forces, bidirectional axial forces, and overturning moments. A single bearing can replace a combination of multiple bearings, greatly simplifying the equipment structure. Theyrt 200 bearing from NEWBEE Transmission has an axial load capacity of up to 100kN, a radial load capacity of 50kN, and an overturning moment of 1600Nm, easily adapting to the heavy-load needs of five-axis machining center turntables. Theyrt 260 bearing (inner diameter 260mm, outer diameter 370mm) further increases the axial load capacity to 140kN, becoming the preferred model for wide and heavy plate CNC turntables, with a load-carrying performance more than 3 times higher than that of single-row bearings of the same size.

2. Ultimate Rigidity and Ultra-Low Vibration: Relying on the symmetric layout of double-row rollers and integral quenching process (base material hardness HRC 60-62), the deformation resistance of YRT Bearings is 5 times higher than that of single-row bearings, and the vibration value during operation can be controlled within ≤2.5mm/s. Using imported German ultra-precision grinding equipment, NEWBEE Transmission controls the raceway tolerance of theyrt 325 bearing (inner diameter 325mm) within ±0.002mm. Combined with the adjustment of preload class C2, it can still maintain a radial runout of ≤0.005mm under an overturning moment of 3600Nm, perfectly meeting the rigidity requirements for heavy-duty cutting. This is also its core advantage distinguishing it from ordinary turntable bearings.

3. Long Service Life and Environmental Resistance: After surface strengthening treatment of GCr15 high-carbon chromium steel, the L10 life (basic rated life) of YRT Bearings is ≥30,000 hours. Among them, theyrt 150 bearing can achieve a service life of more than 40,000 hours under normal lubrication at 800rpm. For humid and corrosive scenarios, NEWBEE Transmission can provide theyrt 120 bearing made of SUS440C stainless steel, which can adapt to the use of precision equipment in coastal areas after anti-rust treatment. At the same time, models using perfluoropolyether (PFPE) grease can operate stably in the temperature range of -30℃~120℃, adapting to extreme high and low-temperature working conditions. 4.Ultra-High Rotational Accuracy and Integrated Design: The rotational accuracy of YRT Bearings covers P4/P2 grades. The end face runout of P2-grade models (such as the customizedyrt 460 bearing) is ≤0.003mm, which can meet the nanoscale positioning needs of semiconductor lithography equipment. Some models are also integrated with an angle measurement system (such as theyrt 80 bearing with a grating ruler), which can feed back the rotation angle in real time and achieve a positioning accuracy of ±5 arcseconds. There is no need to configure an additional angle sensor, greatly simplifying the structural design of precision testing equipment.

4. Low Friction and Excellent Thermal Stability: By optimizing the roller end face curvature and raceway lubrication groove design, the friction coefficient of YRT Bearings is reduced to 0.0015, and the temperature rise during grease lubrication is ≤10℃. NEWBEE Transmission has designed an internal circulating oil channel for theyrt 200 bearing, which can maintain stable oil temperature even under high-speed working conditions of 1200rpm, avoiding precision drift caused by frictional heat. The forced cooling option for theyrt 325 bearing can better adapt to heavy-duty turntable systems that operate continuously for a long time, ensuring thermal stability.

Applications of YRT Bearings

With the advantages of high rigidity, high precision, and composite load-carrying capacity, YRT Bearings are widely used in various precision fields. The various models of NEWBEE Transmission are specifically adapted to different scenario needs:

CNC Machine Tools Field: Theyrt 260 bearing is preferred for the rotary worktables of five-axis machining centers. Its 140kN axial load and 2500Nm overturning moment can withstand heavy-duty cutting impacts, ensuring the dimensional accuracy of workpieces. Theyrt 150 bearing (inner diameter 150mm, height 55mm) is commonly used for the turntables of turn-mill composite machines. Its compact structure adapts to the narrow installation space of the machine tool, and its limiting speed of 800rpm meets the needs of high-speed milling. Large CNC floor-type boring machines mostly use theyrt 325 bearing, whose weight of 35kg and outer diameter of 440mm can provide stable rigid support.

Industrial Robots Field: Theyrt 120 bearing is adapted to the rotating shafts of high-precision welding robots. Its P4-grade accuracy and 45mm height ensure the precise positioning of the robot arm, avoiding welding deviations. Theyrt 80 bearing (weight only 2.2kg) is commonly used for the end effectors of assembly robots. Its lightweight design and limiting speed of 1500rpm can improve the movement flexibility of the robot. The waist turntables of heavy-duty handling robots select theyrt 200 bearing, whose 100kN axial load can carry ton-level heavy objects, and the 1600Nm overturning moment ensures stability during handling.

Precision Testing Equipment Field: Theyrt 150 bearing is mostly used for the rotary platforms of coordinate measuring machines. After integrating the angle measurement system, it can achieve an angle measurement accuracy of ±5 arcseconds, ensuring the accuracy of detection data. Theyrt 80 bearing is commonly used for the drive units of optical testing instruments. Its low-vibration characteristic avoids the positional deviation of optical components, ensuring the reliability of test results. Large roundness measuring instruments select theyrt 325 bearing, whose height of 85mm and radial load of 90kN can adapt to the testing needs of large-size workpieces.

Semiconductor Manufacturing Field: Theyrt 80 bearing is preferred for the turntables of wafer cutting machines. The SUS440C stainless steel material can resist corrosive gases in the wafer processing environment, and its P4-grade accuracy ensures the precision of cutting paths. The customizedyrt 460 bearing is commonly used for the alignment mechanisms of lithography machines. Its P2-grade accuracy and integrated angle measurement system meet nanoscale alignment needs. The rotating units of semiconductor packaging equipment mostly use theyrt 120 bearing, whose compact structure and low-friction characteristic adapt to high-frequency packaging actions.

Factors Affecting the Price of YRT Bearings

The price of YRT Bearings is affected by materials, accuracy, specifications, and customization needs. NEWBEE Transmission can provide a transparent quotation plan to help users accurately control procurement costs:

1.Material Selection: YRT Bearings made of GCr15 high-carbon chromium steel (such as theyrt 80 bearing andyrt 120 bearing) are relatively affordable. However, models made of SUS440C stainless steel (such as the corrosion-resistant version of theyrt 150 bearing) are 25%-35% more expensive than ordinary materials, suitable for humid and corrosive environments. For high-temperature adaptation, the price of theyrt 200 bearing (adaptable to -30℃~150℃) treated with high-temperature tempering will increase by another 20%.

2. Accuracy Grade: P4-grade YRT Bearings (such as theyrt 260 bearing) have strict raceway grinding accuracy (tolerance ≤0.003mm) and are 30%-40% cheaper than P2-grade models, suitable for scenarios such as CNC machine tools and industrial robots. P2-grade models (such as theyrt 460 bearing) require ultra-precision grinding processes, so their prices are higher and they are only used in ultra-high-precision scenarios such as semiconductor lithography equipment. For ordinary turntable scenarios, P4-grade bearings are sufficient to balance performance and cost.

3. Specification and Size: Small and medium-sized YRT Bearings (such as theyrt 80 bearing andyrt 120 bearing) are relatively low-priced. For every 100mm increase in inner diameter, the price increases by approximately 30%-50%. Large models such as theyrt 325 bearing (inner diameter 325mm) have higher processing difficulty (requiring large grinding equipment), so their price is 60%-80% higher than that of theyrt 200 bearing. The customizedyrt 460 bearing (inner diameter 460mm) requires re-design of tooling, so its price is more than 50% higher than that of standard models with the same accuracy.

4. Customization Requirements: The price of YRT Bearings integrated with an angle measurement system (such as theyrt 150 bearing with a grating ruler) increases by 35%-45%. The price of theyrt 260 bearing configured with IP67 protective seals (adaptable to dusty environments) increases by 15%-20%. For oil lubrication circulation systems for high-speed scenarios (such as the forced cooling option for theyrt 200 bearing), the price will increase by 25%-30%. For specific quotations, you can contact NEWBEE Transmission to obtain an exclusive plan.

What Factors Should Be Considered When Purchasing YRT Bearings?

1. Precise Size Matching: The inner diameter of YRT Bearings ranges from 50mm to 1200mm. When purchasing, it is necessary to accurately measure the inner diameter (d), outer diameter (D), and height (H) of the equipment's turntable installation position. For example, theyrt 80 bearing adapts to an installation space with an inner diameter of 80mm, outer diameter of 130mm, and height of 35mm, while theyrt 150 bearing requires an installation space with an inner diameter of 150mm, outer diameter of 225mm, and height of 55mm. NEWBEE Transmission provides a full range of standard models and customized models such as theyrt 460 bearing, and can optimize the size according to equipment drawings to avoid assembly jamming.

2.Adaptation to Accuracy and Preload Grade: For ultra-high-precision scenarios (such as semiconductor lithography), P2-grade YRT Bearings (such as theyrt 460 bearing) should be selected to ensure nanoscale positioning; for CNC machine tools and robot scenarios, P4-grade bearings (such as theyrt 260 bearing) are sufficient. In terms of preload grade, light preload (C0) is selected for low-speed and high-precision scenarios (such as coordinate measuring machines) (adaptable to theyrt 120 bearing), and heavy preload (C2) is selected for high dynamic load scenarios (such as heavy-duty cutting) (adaptable to theyrt 325 bearing) to avoid shortened service life caused by insufficient rigidity or excessive preload.

3. Adaptation to Working Conditions: For humid and corrosive environments, YRT Bearings made of SUS440C material (such as the stainless steel version of theyrt 150 bearing) should be preferred; for high-temperature scenarios (>80℃), customized models with high-temperature grease and tempering treatment (such as the high-temperature version of theyrt 200 bearing) are required; for dusty and water-rich scenarios, IP67 seals (such as the sealed version of theyrt 260 bearing) should be configured. NEWBEE Transmission can optimize the product configuration according to environmental parameters to avoid premature failure caused by improper environmental adaptation.

4. Matching of Load and Speed: Select models according to the equipment's axial load, radial load, and overturning moment. For example, theyrt 80 bearing (axial load 30kN, radial load 15kN) is adapted to light turntables, and theyrt 325 bearing (axial load 180kN, radial load 90kN) is adapted to heavy turntables; grease lubrication can be selected when the speed is ≤600rpm (such as theyrt 200 bearing), and oil-lubricated models (such as the oil-lubricated version of theyrt 150 bearing) should be selected when the speed is >800rpm to avoid wear caused by insufficient lubrication.

5. Supplier Qualification Screening: Suppliers with a complete production chain (material smelting - precision processing - finished product inspection) such as NEWBEE Transmission should be selected. They can provide material inspection reports, load test data (such as the 1.2-times rated load test of theyrt 260 bearing), and after-sales technical support. All YRT Bearings of NEWBEE Transmission undergo 100% accuracy testing and vibration testing, and each product is attached with a quality traceability code to ensure reliability and consistency.

A High-Quality Supplier of YRT Bearings - NEWBEE Transmission

NEWBEE Transmission is a professional manufacturer of YRT Bearings. Having been deeply engaged in the field of high-precision turntable bearings for more than ten years, its products cover the full specification range with inner diameters from 50mm to 1200mm, including standard models such as theyrt 80 bearing,yrt 120 bearing,yrt 150 bearing,yrt 200 bearing,yrt 260 bearing, andyrt 325 bearing. It can also customize extra-large size or special structure products such as theyrt 460 bearing (such as models integrated with an angle measurement system or adapted to high temperatures) according to customer needs. Relying on imported German ultra-precision grinding equipment (Studer S40) and fully automated assembly lines, the raceway tolerance of NEWBEE Transmission’s YRT Bearings is controlled within ±0.002mm, and the roller size consistency error is ≤0.001mm. Combined with the ISO 9001 quality management system, each product undergoes "100% load testing" (such as the 120kN axial load pressure-holding test of theyrt 200 bearing), "accuracy testing" (P4-grade radial runout ≤0.005mm), and "seal performance testing" (IP65/IP67 protection verification) to ensure delivery quality. At present, NEWBEE Transmission’s YRT Bearings have been widely used in global precision machine tool factories, robot enterprises, and semiconductor equipment manufacturers. Among them, theyrt 260 bearing has become the mainstream supporting model for domestic five-axis machining centers, and theyrt 150 bearing occupies an important market share in the field of coordinate measuring machines. For detailed parameters of YRT Bearings (such as the overturning moment of theyrt 325 bearing and the customization cycle of theyrt 460 bearing), technical materials, or quotations, you can contact the technical team of NEWBEE Transmission directly.

Precautions for Using YRT Bearings

1. Standard Installation and Preload Adjustment: When installing YRT Bearings, it is necessary to ensure that the coaxiality deviation between the turntable and the bearing is ≤0.005mm to avoid local wear of the raceway caused by deflection; adjust the preload evenly through the outer ring bolts. For example, the recommended torque for the M24 bolts of theyrt 325 bearing is 200-220N·m, and the recommended torque for the M16 bolts of theyrt 120 bearing is 80-100N·m. Hitting the rings or rollers is strictly prohibited, and it is recommended to use a torque wrench to control the installation force.

2. Scientific Lubrication Management: For grease-lubricated YRT Bearings (such as theyrt 80 bearing andyrt 150 bearing), perfluoropolyether (PFPE) grease should be injected, with a filling amount of 1/2-2/3 of the internal space. It should be supplemented every 1000 hours under normal working conditions, and inspected and supplemented every 500 hours under harsh working conditions (dusty, high-temperature); for oil-lubricated models (such as theyrt 200 bearing), it is necessary to ensure that the circulating oil channel is unobstructed, and the oil volume should be monitored in real time (recommended flow rate 5-8L/min) to avoid excessive frictional temperature rise caused by insufficient lubrication. 3.Regular Inspection and Maintenance: During daily operation, it is necessary to monitor the bearing temperature (normal ≤80℃, high-speed working condition ≤100℃) and vibration value (≤2.5mm/s). If theyrt 260 bearing has a sudden temperature rise (single temperature rise >15℃) or abnormal noise, the machine should be shut down immediately for inspection; the seal integrity should be checked every 2000 hours. If the seal lip of theyrt 325 bearing is damaged, the seal should be replaced in a timely manner and internal impurities should be cleaned; when the bearing has operated to 70% of its service life (such as 28,000 hours for theyrt 150 bearing), preventive testing (such as ultrasonic flaw detection) is recommended to avoid sudden failures causing equipment shutdown.

For the latest prices, customization plans, or technical materials of YRT Bearings (including theyrt 80 bearing,yrt 120 bearing,yrt 150 bearing,yrt 200 bearing,yrt 260 bearing,yrt 325 bearing, andyrt 460 bearing), please contact NEWBEE Transmission:

Email: paul@newbeetrans.com

Official Website: www.newbeetrans.com