VR12- 900×31Z
- Brand
- QIBR
- Alternative brand
- THK
- Rolling element type
- Roller
- Measurement system
- Metric
- Precision level
- H
- Weight
- 5.3 kg/m
- Stroke
- 550 mm
- Total height
- 58 （57.86）
- Width
- 28 mm
- Height
- 28 mm
- Length
- 900 mm
- Temperature
- -15 ℃ to +100 ℃
- Number of holes
- 8
- Distance of holes
- 100 mm
- Location of holes1
- 50 mm
- Seal type
- Open type
- Location of holes2
- 12 mm
- Diameter of through holes
- 8.5 mm
- Bolt size
- M10 mm
- Counter bore diameter
- 14 mm
- Counter bore depth
- 8.2 mm
- Roller diameter
- 12 （11.906）
- Cage length
- 625 mm
- Location of roller
- 12.5 mm
- Distance of roller
- 20 mm
- Number of rollers
- 31
- Basic dynamic load rating
- 17.6 kN
- Basic static load rating
- 17.2 kN
Tell us your operating requirements and required quantity.
Description
In the VR model, precision rollers are arranged orthogonally within a roller cage that integrates with a dedicated rail featuring a V-shaped groove raceway. This configuration allows for precise adjustment of preload, ensuring a clearance-free, highly rigid, and smooth sliding mechanism. The orthogonal alignment of rollers within the cage enhances stability and load-bearing capacity, enabling precise linear motion under varying operational conditions. The V-shape groove in the rail's raceway facilitates smooth movement and reduces friction, promoting efficiency and accuracy in sliding applications. By achieving a preload condition, the VR model enhances responsiveness and minimizes backlash, crucial for applications requiring precise positioning and control. This design not only ensures reliability and durability but also supports high-performance requirements in industrial automation, semiconductor manufacturing, and other precision engineering fields.
QIBR - VR12- 900×31Z Machine Element Advantages and Applications
VR12- 900×31Z Machine Element, precision guiding, high load-bearing capacity,Stroke is 550 mm，Total height is 58 （57.86），Width is 28 mm，Length is 900 mm，Weight is 5.3 kg/m， suitable for CNC machine tools, automated production lines, railways and trams, etc., and is the most widely used bearing in working conditions with high precision requirements.
QIBR - VR12- 900×31Z Machine Element Advantages and Applications
VR12- 900×31Z Machine Element, easy to install and maintain, high stability. VR12- 900×31Z Machine Element, can bear axial, radial and tilting loads at the same time, suitable for mechanical equipment with high precision requirements.
VR12- 900×31Z Rail Product Features and Advantages
High stability: The rollers are arranged crosswise, the contact area is increased, the elastic deformation is small, and the stability and accuracy of the movement are improved.
Structural design: It can withstand axial, radial and overturning moments at the same time, suitable for heavy-duty applications.
Low friction: The friction coefficient is extremely low and uniform, the stick-slip is low and the operation is smooth, the rolling friction is small, and the stability performance is good.
High rigidity: Compared with traditional products, the effective contact length of the rollers is increased, the pitch interval of the rollers is shortened, the number of rollers is large, and the rigidity of the guide rails is improved.
Application: It has a wide range of applications in precision machine tools, unloading systems of injection molding machines, loaders and unloaders of lathes, CT scanners for digital dental X-rays, sliding mechanisms of aircraft seats, etc.
QIBR - VR12- 900×31Z Rail Optimization
High-performance materials: Different materials can be provided according to customer needs, such as stainless steel, aluminum alloy, tungsten carbide, ceramics, etc.
Grease replacement: Choose the appropriate grease according to the working requirements of the guide rail, such as Mobil, Shell, SKF, Klüber, Fuchs, etc.
Surface treatment: Optimize the surface of the guide rail. According to customer needs, use surface treatment technologies such as nitriding, chrome plating or coating to enhance the wear resistance and corrosion resistance of the guide rail.
More customization: QIBR can design and optimize the guide rail according to customer requirements for drawings and guide rail working conditions.
QIBR - VR12- 900×31Z Rail Quality Control
Dimension measurement: Use a variety of professional high-precision instruments to measure multiple dimensions of the guide rail, with a maximum accuracy of 0.001mm.
Hardness measurement: Use a hardness tester to measure the surface hardness of the guide rail, with a measurement accuracy of ±0.5HRC.
Roughness measurement: Use a surface roughness tester to measure the surface roughness of the guide rail, with a maximum accuracy of ±0.01μm.
Load measurement: Use a force sensor to measure the load capacity of the guide rail under static and dynamic conditions.
Geometric tolerance: Use a profiler to measure the geometry and relative position of the guide rail.
Raw material control: Procurement of steel and parts from ISO 14001 certified suppliers ensures product stability while promoting sustainable development.
Features & benefits
In model VR, precision rollers are orthogonally aligned one after another in a roller cage. It can be given a preload, a clearance-free, highly rigid and smooth slide mechanism is achieved.
The cross-roller guides VR series is a common linear sliding guide system. Its design features high rigidity, high precision, and excellent durability. The main structure consists of rollers, guide rails, and sliders, where the rollers move in a crossed pattern along the guide rails, enabling multidirectional movement.
Downloads
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Bearing condition questionnaire
Bearing Condition Questionnaire
Agency document
Agent Application Form
Product brochure
Slewing & Cross Roller Bearing Catalog
Product brochure
Bearing Unit Catalog
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