YRTS325 High Precision Axial & Radial Cross Roller Bearing For Turntable Or Machine Tools

Features:
YRT precision rotary table bearing is a kind of bearing fixed by a bidirectional thrust bearing and a centripetal-guided bearing. They can support radial loads, axial loads from both directions and tilting moments free from clearance and are particularly suitable for bearing arrangements with high requirements for running accuracy,like rotary tables, millings heads and reversible clamps.Due to the fixing holes in the bearing rings, the units are very easy to fit.
The bearings are radially and axially preloaded after fitting.

Sealing/Lubricant:
YRT bearings are supplied with seals. YRT bearings are greased by a lithium complex soap grease and can be lubricated via the outer ring and L-section ring.

Operating temperature:
YRT bearings are suitable for operating temperatures from 30℃ to 120℃

Design and safety guidelines:
Basic rating life:
Please contact us in relation to checking of the basic rating life .The speed ,load and operating duration must be given.

Static load safety factor:
The static load safety factor S0 indicates the security against impermissible permanent deformations in the bearing. It is determined as follows:
Static load safety factor :Cor Coa N
Basic static load rating according to dimension tables: For Foa N
Maximum static load on the radial or axial bearing.
Caution! In machine tools and similar areas of application, S0 should be ＞4

Limiting speeds:
The bearings allow the limiting speeds given in the dimension tables. The operating temperatures occurring are heavily dependent on the environmental conditions. Calculation is possible by means of a thermal balance analysis based on frictional torque data.

Frictional torque:
The bearing frictional torque MRL is influenced primarily by the viscosity and quantity of the lubricant and the bearing preload.
The lubricant viscosity and quantity are dependent on the lubricant grade and operating temperature. The bearing preload is dependent on the mounting fits, the geometrical accuracy of the adjacent parts, the temperature difference between the inner and outer ring, the screw tightening torque and the mounting situation.

Starting torque:
For YRT bearing, it must be taken into consideration that the frictional torque can increase by a factor of between 2 and 2.5 with increasing speed.

Accuracy of adjacent construction:
The adjacent construction should be produced in accordance with Figure and the tolerances must be in accordance with the tables starting on page. Any deviations will influence the bearing frictional torque ,running accuracy and running characteristics.

Legend to Figure:
1.Support over whole bearing height. It must be ensured that the means of support has adequate rigidity.
2.A precise fit is only necessary if radial support due to the load or a precise bearing position is required.
3.Note the bearing diameter D1 according to the dimension tables. Ensure that there is sufficient distance between the rotating bearing rings and the adjacent construction.
Geometrical and positional accuracy of the adjacent construction:

Mounting dimensions H1,H2

L-section ring without support ring:
For the case “L-section ring without support ring”, the bearing designation is :YRT
L-section ring with support ring:YRT bore diameter VSP
For the case “L-section ring with support ring”, the bearing designation is :YRT VSP
Caution! For bearing arrangements with a supported L-section ring , only bearings with the suffix VSP,EB or T52EA can be ordered. If the normal design is mounted with a supported L-section ring, there will be a considerable increase in the bearing frictional torque .The support ring should be at least twice as the shaft locating washer of the bearing.

Fitting:
Retaining screws secure the bearing components during transport, For easier centring of the bearing ,the screws should be loosened before fitting and either secured again or removed after fitting. Tighten the fixing screws in crosswise sequence by using a torque wrench in three stages to the specified tightening torque MA, rotating the bearing:
Stage 1 40% of MA
Stage 2 70% of MA
Stage 3 100% of MA
Observe the correct grade of the fixing screws.
Caution! Mounting forces must only be applied to the bearing ring to be fitted, never through the rolling elements. Bearing components must not be separated or interchanged during fitting and dismantling. If the bearing is unusually difficult to move ,loosen the fixing screws and tighten them again in steps with a crosswise sequence. This will eliminate any distortion. Bearings should only be fitted in accordance with ,Fitting and Maintenance Manual.

YRT Dimensional tolerances, mounting dimensions, axial and radial runout YRT

For rotating inner and outer ring,measured on fitted bearing, with ideal adjacent construction.
Special design,YRT only.
By agreement only for rotating outer ring.

For rotating inner and outer ring,measured on fitted bearing, with ideal adjacent construction.

Special design:
For YRT, axial and radial runout tolerances reduced by 50%,
Additional text: axial/radial runout 50%
For YRT, loser tolerance on mounting dimensions H1 and H2. Additional text:H1 with tolerance±…; H2 with tolerance.

MONTON bearing a main manufacturers leader of high precision bearings in China was established in 2001 locate in Luoyang--“Ancient Imperial Capital and Peony Flower City”,we specialized in the bearing production research and development more than 20 years , focus on the development of "High-tech, High precision, Advancing, customized" bearings development .MONTON covers an area of of 35000 sq.m., building area of 20000 sq.m., including office area 3000 sq.m., research and development center of 500 sq.m., and international marketing & reception center 2000sq.m.Our mission is to provide customers with complete solution, including design and development, manufacturing, testing and evaluation, and excellent after-sales service.The factory is located in the Bearing Industry Park of Yiyang County, Luoyang City, Henan Province.

MONTON bearing mainly produce high precision angular contact ball bearing, ball screw support bearing,Low temperature bearing,High speed motor bearings, military thin section ball bearing,special high precision bearing, crossed roller bearing,harmonic drive bearing,thrust bearing stack,Tungsten Carbide Radial Bearing, military thin section ball bearing,tandem bearing,cylindrical roller bearing, customized bearing and bearings parts, The bearing accuracy at P5/P4/P2 level, rolling elements from φ1mm to 160mm, precision degree Ⅰ、Ⅱ.We Contributions to important scientific research projects of several well-known universities, including Henan University of Science and Technology, Dalian University of Technology, Harbin Institute of Technology, Beijing University of Science and Technology, Beijing traffic University, and China Petroleum etc.

We produce bearings and parts with inner diameter of 1.5mm to an outer diameter of 3000mm. Our products have been widely used in important industrial fields such as CNC machine tools, high-speed spindles, precision measurement instruments, oil drilling, petrochemicals,Cryogenic pump, FANUC/Siemens motors, mining metallurgy, port machinery, medical equipment, extruder gearbox, Cement roller press, vertical mill, rocker arm, textiles equipment, paper mill,robotics, harmonic drive, concrete mixer trucks, steel mills, rolling mills,Wind Power,Continuous casting mill, UAV, Air Compressor,Tension levelers,LIDAR systems,missile tracking camera ,aerospace, etc.

Our company have very good products quality guarantee equipment, key equipment and instrumentation are imported or design special equipment for special procedure by us. Main instrumentation is Japan ACCRETECH, TAYLOR,ZEISS Germany etc. Established precision bearing product testing laboratory, we can test bearing performance and life,Passed ISO9001 quality system certification, with an annual production capacity of 1 million sets of various precision bearings.

MONTON owns CNC lathes, machining centers, CNC grinding machines, and ultra precision equipment more than 160 sets. 10 CNC lathes, 65 CNC precision grinding machines, and 1set 4-axis machining center. 2 sets Ultrasonic cleaning line and equipment,2 sets tempering and stabilizing furnaces,1set heat treatment furnace，1sets low temperature stabilization equipment and vacuum equipment,8 production lines of automatic assembly.Inspection equipment include Mitotoyo Japan Contour,roundness measuring instrument,hardness tester,coordinate measuring instrument, length measuring instrument,vibration measuring instrument,contact angle goniometer,Bearing convexity value measuring instrument,hardness tester,Metallographic tissue measuring instrument,Clearance measuring instrument,height measuring instrument,Inner diameter outer diameter and rotation accuracy measuring instrument etc.

We have more than 140 employees, including 10 technical persons and 25 inspection persons. There are 5 persons with a master's degree, 25 persons with bachelor's degree, and 30 with vocational degree currently .

With advanced production equipment and perfect testing technology, MONTON can guarantee the quality and accuracy of the products we produced. Our technical department can efficiently complete the bearing design according to customer needs, and customers who need non-standard bearings can also enjoy customized services. Our quality system regularly monitors various production facilities and complies with strict quality requirements. All material certificates and certification reports are kept in files. Products are traceable and can be provided on request. Therefore, we are confident to provide the best solutions for global customers. Our company can design non-standard bearings and special application bearings for customer, as well as customized products with samples!

We are innovative, motivated and courageous to provide our customers with necessary solutions. Our management and employees are always ready to provide professional and personalized services to our customers. In the future, MONTON will adhere to the brand development strategy, strengthen the research and development of high-end products, strive to build a digital factory, and join hands with more partners to work together for a better future!

Company spirit: Honesty, Trustworthiness and Mutual benefit;

Company policy: Quality-oriented;

Company Business philosophy: Honesty,fulfill promise;

Company principle: Solve problems for customers and prioritize customer service at first.

We warmly welcome all friends come to visit us, study or business negotiation.