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THK HSR slides (X, XX, Y and Z axis) and BTK Ball Screws (Z axis)
Model SKR Caged Ball LM Guide Actuator
Model SKR Caged Ball LM Guide Actuator

Moreover, the addition of the LM guide and ball screw sections with Caged Ball Technology allows the SKR-type LM guide actuator to achieve higher speed, lower noise, longer maintenance-free operation, and other features in comparison with the conventional KR-type.
Features of the Model SKR:
Four-way Equal Load Rating
Each row of balls is arranged at a contact angle of 45° so that loads acting on the nut block in the four directions (radial, reverse-radial, and two lateral directions) show the same rated load. Thus, the SKR-type LM guide actuators can be used in any position.
High Rigidity
The adoption of the LM rail of a U-shaped cross-sectional form allows improved rigidity against moment.
High Precision
The linear motion guide raceway has four rows of circular arc grooves that provide smooth motion by mere pre-load; clearance-free, highly rigid guidance is obtained. In addition, changes in frictional resistance resulting from load variations are minimized, allowing the SKR-type to achieve high-precision feed.
Space Saving
The integration of a LM guide raceway on both side faces of a nut block and the integration of a ball screw nut at the center of the nut block allow the SKR-type to achieve high rigidity and high precision in a minimal space.
Long Life Span and Long-term Maintenance-free Operation
Thanks to the effectiveness of its ball retainers, the SKR has improved grease retention capability, allowing it to achieve a long life span and long-term maintenance-free operation. The SKR achieves a longer life span because its basic dynamic rated load at the LM guide and ball screw sections is greater than that of the conventional KR models (in the case of the KR3310, three times greater). The rated life span can be calculated by the following equation.
High Speed
Through the use of Caged Ball Technology, the SKR-type is compatible with the latest high-speed rotational AC servo-motors (6000 min-1), achieving higher speeds than the conventional KR-type. The ball screw lead settings of the conventional KR33 type were 6 mm and 10 mm. To achieve a higher feed rate, a 20 mm ball screw lead has been added to the new SKR 33 series.
Excellent Sliding Capability
Caged Ball Technology also helps the SKR-type eliminate ball-to-ball friction, significantly improving the torque characteristics. It minimizes torque variations, allowing excellent sliding capability.
Low Noise
The use of Caged Ball Technology in the LM guide and ball screw allows the SKR-type to eliminate the noise caused by the balls colliding. This lets the SKR-type achieve low noise emission and a pleasing sound quality.
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THK Linear Motion Guides and Actuators by Technico
www.technico.com or at 330-847-7000
THK Double-Row RU Roller Ring
New THK Double-Row RU Roller Ring
Schaumburg, IL – The Type RU Roller Ring from THK features compact, yet highly rigid construction. The double-row roller structure and integrated inner and outer rings of the Type RU result in 20 to 30 percent higher rigidity than competitor models.
The Type RU’s use of small rollers reduces differential slip and therefore the torque required for rotation is small.
Installing the Type RU is easy due to the inclusion of mounting holes on the inner and outer rings. Housings and presser flanges are not required, and few assembly parts are needed. Design configuration is flexible per customer specifications.
THK manufacturers the widest range of linear motion products including conventional LM guides, ball screws, mechanical actuators and ball splines and more. All THK products have been designed and manufactured to meet the strictest requirements. THK’s experienced Global Engineering Team can provide customized linear motion solutions with our standard linear motion products as well as our mechatronics products for your most demanding applications.
THK Linear Motion Guides and Actuators by Technico
www.technico.com or at 330-847-7000
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THK to exhibit at CIMES machine tool exhibit
The 11th edition of CIMES boasts a 120,000 sqm exhibition space and expects 1,300 exhibitors from 28 international regions and countries as well as 55,000 trade visitors from more than 70 countries and regions during June 12-16, 2012 at NCIEC in Beijing .
Generating $284 million in business transactions onsite in 2010, CIMES demonstrated its efficiency in delivering the right buyers to its exhibitors as well as its business matching capabilities and is applauded by those machine tool companies with an ambitious business expansion plan for the fast growing China market.
“The total number of customers we met at CIMES 2010 is almost equivalent to the total amount of customers we met in the exhibition held in the United States for the past 10 years,” says Du Tong, President of Asia Corporation, MegaFab (Tianjin) Co., Ltd.
With still 5 months before opening of CIMES 2012, more than 1,000 exhibitors signed up for this leading biennial machine tool trade show in Beijing, among which there are many leading companies which repeat their participation in CIMES as well as quite a lot first time international exhibitors, reflecting the world’s machine tool industry player’s optimism in the booming China market.
A large number of market leaders are slated to repeat their participation in 2012, including DMG, Mazak, Mori Seiki, Doosan, Trumpf, Haas, MAG, OKUMA, Traub, Gleason, Makino, GF, Index, Hermle, Fagor, Bystronic, EMAG, Fermat, Rexroth Bosch Group, Iscar, Nicolas Carrea, MegaFab, EMUGE Franken, THK, BLM Group, Suzhou Lead Laser and Huagongtech, among others.
Many new first time international exhibitors at CIMES 2012 will enrich the exhibits portfolio with high quality machine tools. For the reputable and traditionally highly reliable and efficient German companies, there are Messer CuttingSystems and Zeiss (measuring systems) which are famous for their precise technology; Matec will showcase its large variety of machining centers and Schwaebische Werkzeugmaschinen will demonstrate its high technology production line.
THK Linear Motion Guides and Actuators by Technico
www.technico.com or at 330-847-7000
Technico Line Card
THK Company Profile
THK America, Inc. - Company Profile
Linear Motion Systems
(e.g. LM Guide, Ball Spline, Ball Screw, XY Table, Link Ball, and Rod End)
Caged roller guides – The caged roller guides adopt a cage to prevent the introduction of skew, realizing low-friction smooth motion. They are ultra super rigid roller guides that offer long life and long-term maintenance-free operation.
Caged ball LM guides – The balls in the caged ball LM guides are retained and separated by ball cages which eliminate the friction between the balls. In addition, a grease pocket is formed between the balls and the cage. This increases the block’s grease retention capability, ensuring long life and long-term maintenance-free operation.
LM guides – THK’s LM guides transform sliding linear motion into rolling motion. They apply the rotation theory of the “well base ball bearing”, which is the easiest to use and most economical rolling bearing, to the linear motion parts. The type of contact between the rolling surface and the ball has been transformed from “Point contact” toward “surface contact” by providing R-shaped grooves with a radius close to that of the balls on the rolling surface.
Ball splines – A ball spline is a direct motion system in which the balls can convey a torque being generated either from the spline shaft or the spline nut while making a linear motion smoothly in the raceway groove of the precisely ground spline shaft.
Ground ball screws – A wide variety of high-precision ball screws are available as standard parts so that users can select the most suitable part according to their application. Also available as a series , are a line of ball screws which are suitable not only for conventional shaft rotation use but also for nut rotation.
Rolled ball screws – THK’s rolled ball screws are low-cost ball screws which adopt a screw shaft that incorporates a rolled thread and special surface grinding instead of an expensive ground screw shaft.
Linear bushings – THK’s linear bushings are direct motion systems that, used in combination with a hardened shaft, give infinite linear motion. Since their load balls and hardened shaft make point contacts, they support linear motion at a minimum frictional resistance and offer highly precise smooth motions though their permissible load is rather low.
Cross roller rings – Since cross roller rings are arranged so that they alternate orthogonally with each other on a 90-degree V-groove-shaped rolling surface through spacers; a single bearing can carry loads in all directions, including radial, axial, and moment loads.
Rotary series – THK’s cam and roller followers are compact and rigid bearings which incorporate needle bearings, and are used as cam mechanisms and linear motion rollers, respectively.
Spherical joints – THK’s spherical bearings are self-aligning slide bearings for carrying heavy loads. The rod end provides clearance and extremely smooth rotation and oscillating motions. The ring balls excel in wear resistance and realize clearance-free smooth motions.
Actuators – These are a series of actuators that combine linear guides, ball screws, and linear motors. THK offers a line of actuators in wide variations including a single-shaft type. These actuators can be combined into multi-axis systems.
Units – Units refer to tables that combine the LM guide and ball screws in an XY configuration and offer high-precision feeds. They are the results of combining THK’s best technologies and include standard tables, hollow tables, and tables that automatically correct misalignments.
Linear Motor Actuators – These actuators are optimized for LM guide ratings and motor heat dissipation thus enabling the creation of high quality linear motion systems. The actuators can be customized in various ways to conform to LM guides with different surface treatments or surface requirements. These high precision units feature high speed, sharp acceleration and deceleration, a fast response time, long stroke and clean and quiet operation. Special purpose units can also be created by combining a discrete linear motor with specially designed mechanisms.
THK Linear Motion Guides and Actuators by Technico
www.technico.com or at 330-847-7000


