ABB SKR20/12

Stroke: 25mm and 60mm
Outer rail length: 150mm (for 25mm stroke) and 200mm (for 60mm stroke)
Dimensional parameters:A: 18.8mm (for 25mm stroke) and 25.3mm (for 60mm stroke)
B: 17.2mm (for 25mm stroke) and 25.3mm (for 60mm stroke)
a: 33.2mm (for 25mm stroke) and 52mm (for 60mm stroke)
b: 52mm (for 25mm stroke) and 52mm (for 60mm stroke)
W: 60mm (for 25mm stroke) and 60mm (for 60mm stroke)
H: 10mm (for 25mm stroke) and 10mm (for 60mm stroke)
H1: 20mm (for 25mm stroke) and 20mm (for 60mm stroke)

Product Features
Four-way equal load: Each row of balls is arranged at a 45° contact angle, ensuring that the rated load on the inner block is evenly distributed under loads applied in four directions (radial, anti-radial, and lateral), allowing use in any installation orientation.
High rigidity: The outer guide with a U-shaped cross-section enhances rigidity against torque and torsion.
High precision: The linear guide part consists of four rows of arc grooves, enabling smooth movement of balls even under preload, thus achieving a gap-free, high-rigidity guide.
High-speed operation: High-speed operation and low noise are achieved through the use of ball cages.
Maintenance-free: Long-term maintenance-free operation reduces maintenance costs.

Structure and Composition
The structure of ABB SKR20/12 mainly includes:

LM guide unit: Composed of an LM guide block and a ball screw nut built into the U-shaped outer guide.
Ball screw unit: Equipped with a QZ lubricator to ensure long-term maintenance-free operation.
Ball cage: Used only in the LM guide part of models SKR20 and SKR26, improving operational efficiency and stability.

Application Fields
ABB SKR20/12 is widely used in the following fields:

Industrial automation: Used in frequency converter control, PLC programming, and process control.
Power systems: Suitable for monitoring and protection of power relays, rectifiers, and inverters.
Machine tool control: Used as an independent PLC module for CNC machine tools.
Other fields: Such as geology and mining, building materials, electronics, and rail transit.

Installation and Maintenance

Installation: The installation methods of ABB SKR20/12 include wall-mounted and cabinet door mounting. Specific installation steps should refer to the product manual.
Maintenance: Due to its design for long-term maintenance-free operation, daily maintenance requirements are low. However, during use, it is recommended to regularly check the status of lubricants and the cleanliness of the guide to ensure optimal performance.