| Customization: | Available |
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| Rolling Body: | Roller Bearings |
| The Number of Rows: | Single |
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Features of the Crossed Roller Ring
Structure and Features
With the Cross-Roller Ring, cylindrical rollers are arranged with each roller perpendicular to the adjacent roller, in a 90° V groove, separated from each other by a spacer retainer. This design allows just one bearing to receive loads in all directions including radial, axial and moment loads. Since the Cross-Roller Ring achieves high rigidity despite the minimum possible dimensions of the inner and outer rings, it is optimal for applications such as joints and swiveling units of industrial robots, swiveling tables of machining centers, rotary units of manipulators, precision rotary tables, medical equipment, measuring instruments and IC manufacturing machines.
High Rotation Accuracy
The spacer retainer fitting among cross-arrayed rollers prevents rollers from skewing and the rotational torque from increasing due to friction between rollers. Unlike conventional types using steel sheet retainers, the Cross-Roller Ring does not cause unilateral contact of roller or seize. Thus, even under a preload, the Cross-Roller Ring provides stable rotation.
Since the inner and outer rings are designed to be separable, the bearing clearance can be adjusted.
In addition, a preload can be applied. These features enable accurate rotation.
Easy Handling
The inner and outer rings, which are separable, are secured to the Cross-Roller Ring body after being installed with rollers and spacer retainers in order to prevent the rings from separating from each other. Thus, it is easy to handle the rings when installing the Cross-Roller Ring.
Skewing Prevention
The spacer retainer keeps rollers in their proper position, thereby preventing them from skewing(tilted rollers). This eliminates friction between rollers, and therefore secures a stable rotational torque.
Increased Rigidity (Three to Four Times Greater than the Conventional Type) Unlike the thin angular ball bearings installed in double rows, the cross array of rollers allows a single Cross-Roller Ring unit to receive loads in all directions, increasing the rigidity to three to four times greater than the conventional type.
Large Load Capacity
(1) Compared with conventional steel sheet retainers, the spacer retainer allows a longer effective
contact length of each roller, thus signifi cantly increasing the load capacity. The spacer retainer guides rollers by supporting them over the entire length of each roller, whereas the conventional type of retainer supports them only at a point at the center of each roller. Such one-point contact cannot suffi ciently prevent skewing.
(2) In conventional types, the loaded areas are asymmetrical between the outer ring and the inner ring sides around the roller longitudinal axis. The greater the applied load is, the greater the moment becomes, leading end-face contact to occur. This causes frictional resistance, which hinders smooth rotation and quickens wear.
Types of the Cross-Roller Ring
Types and Features
Model RU (Integrated Inner/Outer Ring Type)
Since holes are drilled for mounting, the need for a presser fl ange and a housing is eliminated. Also, owing to the integrated inner/outer ring type stryucture with washer, there is almost no effect from installation on performance, allowing stable rotational accuracy and torque to be obtained. Can be used for both outer and inner ring rotation.
Model RB (Separable Outer Ring Type for Inner Ring Rotation)
Cross-Roller Ring basic type, with a separable outer ring, and an inner ring integrated with the main body.It is used in locations where the rotational accuracy of the inner ring is required. It is used, for example, in the swivel portions of index tables of machine tools.
Model RE (Two-piece Inner Ring Type for Outer Ring Rotation)
Main dimensions are the same as model RB. This model is used in locations where the rotational accuracy of the outer ring is required.
Model RA (Separable Outer Ring Type for Inner Ring Rotation)
A compact type similar to model RB with the thinnest possible inner and outer rings. Optimal for locations requiring a light-weight and compact design such as the swivel portions of robots and manipulators.
Selecting a Cross-Roller Ring
The following diagram shows a typical procedure for selecting a Cross-Roller Ring.
Model Number Coding
Model number confi gurations differ depending on the model features. Refer to the corresponding
sample model number confi guration.
Cross roller rings with integrated inner and outer rings.
Model RU
Models RB, RE, RA and RA-C
| Type | Crossed roller |
| Seires | RA Crossed roller bearing |
| ModelNo. | RA12008UUCC0P5 RA12008UUCC0P4 |
| Innerdiameter | 120 |
| Outerdiameter | 136 |
| Rollerpitchcirclediameter | 127 |
| Width | 8 |
| C | 7.84KN |
| Co | 16.5KN |
| Weight | 0.17KG |
| Brand | MONTON |
| Package | Single box/Carton/Plywood Case |
| Precision | P4/P5 |
| Seals | As requested |
| Original | Luoyang |
| Delivery date | According to qty |
| Ring Materail | Gcr15 |
| Supply Ability | 10000PCS/MONTON |
| Customization | Acceptable |
| Certificate | Test report, ISO9001 |
| Application | joints and swiveling units of industrial robots, swiveling tables of machining centers, rotary units of manipulators, precision rotary tables, medical equipment, measuring instruments and IC manufacturing machines. |
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Monton bearing was established in 2001 seated in Luoyang--"Ancient Imperial Capital and Peony Flower City",we focusing on the bearing field for more than 20 years and we specializing in the development of "High-tech, High precision, Advanced, Non-standard" bearings.Monton's mission has been and will continue to be to provide customers with complete integrated solutions, including design and development, manufacturing, testing and evaluation, and second-to-none after-sales service. Monton bearing is mainly engaged in the production of the angular contact ball bearing,High precision crossed roller bearing,Thrust bearing stacks and TC radial bearings,Low temperature,The section ball bearing,Cylindrical roller bearing,Spherical roller bearing,Thrust roller ball bearings and harmonic drives bearing and the customized non-standard bearings. We made outstanding contributions to the important scientific research projects of many well-known universities such as Zhejiang University, Harbin University of technology, Beijing University of science and technology, Beijing Jiaotong University and China University of petroleum and won high praise from users. We have batch production on high-grade bearing products and components with an inner diameter of 0.6mm to an outer diameter of 5m. Our products have been widely used in Machine tools,Weapons,Oil drilling,Cryogenic pumps, Mining, Metallurgy,Port machinery, Medical treatment,Extruder gearboxes,Cement,Textiles,Industrial robots, Harmonic drives, Paper machinery, Concrete mixers, Rolling mill and national defense industry field. 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. 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; Company principle: Solve customers problems and maximize customer benefits! |
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