A new large size of the compact and high-rigidity "SKR" is now available! It enables the transportation of even larger items!
The large size of the compact series electric actuator "SKR," known for its high rigidity, high speed, and long-term maintenance-free operation, is now available! Applications in processing, assembly, inspection, and transportation will further expand! ▼ Features <High Rigidity & High Precision> The SKR 55/65 is a compact, high-rigidity, and high-precision actuator that integrates a ball screw nut into an LM block and positions the inner block inside an outer rail with a high-rigidity U-shaped cross-section. <Cost Reduction Achieved> Since the housings on both sides serve as support units and the inner block also functions as a table, significant reductions in design and assembly labor can be achieved, allowing for overall cost reduction. ▼ Other Features ○ High Speed ○ Equal Load in Four Directions ○ Long Lifespan ○ Long-term Maintenance-Free ○ Low Noise & Good Sound Quality ○ Mounting Dimension Compatibility with KR 55/65* *Some dimensions may differ. ▼ For more details, please refer to "Detailed Information" or "Catalog"!
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basic information
▼ What can be done with "SKR". 【Processing and Assembly】 ○ Compact and high precision, making it ideal for desktop processing machines. ○ Compact and high rigidity, achieving space-saving even with a 3-axis setup. ○ Equipped with ball retainers that minimize rolling resistance even in vertical use, ensuring smooth operation and precision. 【Inspection】 ○ High rigidity and long lifespan, making it perfect for various durability testing machines. ○ High precision allows for compatibility with inspections that require accuracy. ○ SKR can withstand strong tensile forces, making it suitable for devices that measure adhesive strength. ○ By combining SKR with R guides, high-precision inspections can be performed from all directions. ○ Smooth operation improves various scanning accuracies. 【Transport】 ○ By replacing traditional rack and pinion drives, it enables compact and high-tactile operation. ○ Adopting ball retainers allows for smooth transport even when using liquids and other materials. ▼ Product specifications and dimensions can be viewed in the "catalog."
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Applications/Examples of results
Optimal for high-precision positioning! 【Processing / Assembly】 Dispenser / Film bonding device / Desktop processing machine / Welding machine / Engraving device / Hole processing machine 【Inspection】 Durability testing device / Flooring surface roughness measurement device / Image recognition device / Continuity testing device / Printed circuit board continuity testing device / Cell inspection device / Luminance measuring instrument / Tensile testing machine / Flatness measuring instrument / X-ray inspection device / Substrate appearance inspection device 【Transport】 Inter-process transport device / Liquid injection machine / Cardboard raw paper centering device / Pick & place
Detailed information
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Structure of SKR55/65 The SKR55/65 is a compact, high-rigidity, and high-precision actuator that places an inner block, which incorporates a ball screw nut into an LM block, inside an outer rail with a high-rigidity U-shaped cross-section. Additionally, since the housing A/B serves as a support unit and the inner block also functions as a table, it significantly reduces design and assembly man-hours, enabling a total cost reduction.
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Feature 1: High Speed By increasing the variations of ball screw leads, it is now possible to select a large lead as a standard option, which was not achievable with the previous KR55/65. In addition to the increased allowable rotational speed due to the retainer effect of the ball screw, selecting a large lead enables even faster operation.
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Feature 2: Four-directional equal load The ball rows are arranged at a contact angle of 45° to ensure that they have the same rated load against loads acting in four directions (radial, reverse radial, and lateral) on the inner block, allowing for use in any orientation.
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Feature 3: High Precision The linear guideway, designed with a four-row circular arc groove that moves lightly even under preload, provides a gapless and highly rigid guidance. Additionally, changes in friction resistance due to load variations are minimized, allowing for high-precision feeding to be followed accurately.
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Feature 4: High Rigidity By adopting an U-shaped cross-section for the outer rail, high rigidity has been achieved.
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Feature 5: Retainer Effect The SKR improves grease retention capability due to the effect of the ball retainer, achieving long-term maintenance-free operation. Additionally, the basic dynamic load ratings of the LM guide and ball screw sections have increased compared to conventional models, resulting in a longer lifespan. [Low Noise & Good Sound Quality] By adopting ball retainers in the LM guide and ball screw sections, the collision noise between the balls has been eliminated. This has resulted in low noise and good sound quality.
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Feature 6: Compatible Mounting Dimensions with KR55 and KR65* Since the mounting dimensions are designed to be the same as those of KR55/65, it is easy to replace from the conventional KR. *Some dimensions may differ.
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Type 【A Type (Long Type Block 1 Unit)】 This is the representative model number of SKR. 【B Type (Long Type Block 2 Units)】 This type comes with 2 inner blocks of A Type, achieving high rigidity and high load capacity.
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Rich size variations With the addition of larger sizes, the range of size variations has increased, allowing for the transport of even larger items.
Line up（2）
| Model number | overview |
|---|---|
| SKR 55 | |
| SKR 65 |
catalog（1）
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Company information
Since our establishment in 1987, we have provided various FA equipment tailored to our customers' needs. Now, as a member of the THK group, the world's top manufacturer of linear motion systems, we have 18 sales locations across Japan, responding quickly and accurately to our customers' requests.