Are you new to linear actuators? Are you looking for some guidance in choosing an actuator for a project? The experts at Technico, Inc. can guide you through the entire selection process in four steps. In basic terms a linear actuator is a device that produces motion in a straight line and is powered by an external energy source, commonly achieved with a rod extending and retracting or with a slider that moves on a track. Linear actuators are used in innumerable applications. The following steps are helpful in determining which linear actuator will suit your application. (more…)
Unexpected linear motion applications are everywhere! They range from relatively simple, such as an inexpensive seat actuator in a passenger vehicle to a complex multi-axis coordinate system, complete with control and drive electronics for closed-loop positioning. No matter how simple or how complex the linear motion system, at the most basic level they all have one thing in common. Moving a load through a linear distance in a specific amount of time, linear rails and linear actuators are used to control movements with different variables and complexity. (more…)
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Based on Newton’s First Law of Motion, any object that doesn’t experience a net force will constantly move in a straight line at the same velocity, which is called linear motion. Every day we are surrounded by things that move in a linear motion. Whether in machine tools, robots, semiconductor production applications, precise measuring equipment, medical devices or computer-controlled machines and systems for other industry sectors. As a leader in Motion Control, Technico specializes in offering a broad range of automation technologies to OEM’s in a wide variety of industries. Primary industrial applications include machine tool, metalworking, automation, transfer equipment, automotive, robotics, medical, tire and rubber, injection molding, press, steel mill equipment, packaging and special machinery among others. (more…)
By specifying THK’s innovative ballscrews, AddisonMcKee successfully reduced the size of its latest tube-bending machine, while increasing controllability and slashing energy consumption. Although some believe bigger is better, others consider smaller sizes more appealing. Mobile phone manufacturers, microchip producers and personal computer designers have all seen the extreme benefits of going small.
In the world of original equipment manufacturers, however, power, accuracy and reliability prevail, although relative downsizing is increasingly being seen as a way of effectively differentiating products. (more…)
THK has added two new models to its proven range of high performance linear motion systems. The latest versions of the Super roller guide (SRG) are now available in larger sizes of 85 and 100mm, and form part of a product family that is designed to combine exceptional levels of rigidity, accuracy and reliability in compact, virtually zero maintenance units. The new LM Guides incorporate THK’s patented Caged Roller technology.
This improves overall performance, while reducing levels of friction, heat and noise to an absolute minimum.
In addition, the use of Caged Roller technology significantly enhances both rigidity and stiffness, while allowing loads to be moved or transferred smoothly and at extremely high speeds.
Designed for use throughout industry, the new SRG models utilise linear-roller technology to provide smooth movement through low rolling resistance.
The roller retainer, with grease pockets between the elements, provides exactly the right amount of lubrication directly where needed, resulting in substantially longer lubrication intervals and maintenance free operation.
Extensive testing of the SRG models has proved that rolling resistance is reduced by up to three times and with significantly less fluctuations than with conventional full roller types.
Similarly, when compared with conventional roller bearings, the Caged Roller type SRG offers unique rigidity with radial and lateral stiffness typically improved by 40% and reverse radial stiffness is over 75% greater.
Ideally suited to particularly tough and demanding conditions in manufacturing, automation or process applications, the new SRG models are available with static load capabilities ranging from 165 to 599kN, and with a choice of either compact or flange type carriages.
THK has launched two new models to extend still further its proven range of high performance LM Guide systems. The latest versions of the SRW Caged roller guide are now available with extra-wide guide rails, of 130 and 150mm in width, to provide even greater load capacity, in terms of both weight and overall size, with excellent levels of rigidity, positional accuracy and repeatability. The new SRW LM guide incorporates THK’s patented Caged Roller technology, which is based on the proven operating techniques used in the company’s Caged Ball linear motion devices, with the steel ball arrangement being replaced with two sets of opposing caged rollers positioned at 45-degree contact angles between each side of the block and rail.
The rollers circulate within specially developed retaining cages, with retaining plates being used to ensure that the rollers remain permanently aligned in a uniform arrangement.
This configuration allows lubricating grease to be applied evenly across the face of individual rollers and retained between rollers at all times; as a result maintenance can be virtually eliminated, with tests proving potential maintenance free operation to be in excess of 40,000km.
Compared with conventional roller bearing products, the latest THK caged roller systems offer up to 38% greater radial stiffness and over 40% more lateral stiffness.
In addition, they provide considerably lower levels of friction, can be used at both high and low speeds, with equal degrees of accuracy, and are almost silent in operation.
The exceptionally tough and rigid construction of SRW means that the latest linear motion guides can carry static load capacities up to 600kN, can be preloaded and will handle loads applied in the radial, reverse-radial and lateral directions.
The units can be mounted horizontally or vertically and are available with a range of accessories including THK’s unique QZ lubrication system, which extends maintenance intervals still further, the LaCS laminated contact scraper system, plus metal scrapers, plate covers and a range of seals for use in severe environments.
THK continues to push the boundaries of its proven Caged Ball technology, with the introduction of the system into a new range of miniature SRS LM guides. The benefits of caged ball technology, most notably, silent movement, virtually maintenance free operation and high speed, make the new miniature linear motion guides particularly suitable for use in semiconductor, electronics manufacture, biotec, medical and precision automation and measurement applications. Available in 9, 12 and 15mm rail widths, the new miniature SRS LM guides maintain compact dimensions in all planes.
For example, the 9mm rail has a total width, with block, of 20mm and is just 10mm in height.
In addition to the three rail widths, the new miniature series also encompasses an additional wide version that enables higher load ratings and permissible moments to be applied.
Furthermore, linear bearing lubrication in the new SRS miniature series is provided by THK’s specially developed grease, type AFB, which substantially reduces the generation of airborne particles in operation.
As a result, the new range offers benefits in clean room applications, across a variety of industries.
‘The introduction of the miniature SRS LM guides with caged ball greatly extends the application possibilities of the range’, comments Bob Love, Internal Sales Manager.
‘Initial product trials have provided very promising results and we are confident that the new miniature products will offer superior performance over the competition’.
Innovative linear motion products from THK are making it possible to produce quieter and more compact operating mechanisms for sliding doors in elevators and general building applications. With noise levels reduced by up to 50% compared with conventional products, the new mechanisms minimize the disturbance created by a door opening and closing – a benefit which is particularly important in quiet environments, such as hospitals and libraries. The smaller size of the new mechanisms allows them to be accommodated in a slim enclosure which is, in most cases, mounted above the doors.
This means that, for a given size of door aperture, more space is available for the doors themselves, greatly improving the overall appearance, especially with fully glazed doors.
Particularly well suited for sliding door applications are THK SNS- and SHS-series guides.
These are four-way equal load products that combine a high load rating with rigidity and precise operation, and which are available in a wide range of sizes.
SNS and SHS guides are easy to install and are offered with a wide range of options, including seals, scrapers and covers, which allow them to be readily configured to match the application.
Like all products in the extensive THK range, SNS- and SHS-series guides incorporate the company’s proven and industry-leading Caged Ball technology.
Balls roll in raceways that are precision-ground in the LM rail and block, while endplates incorporated in the block allow the balls to recirculate quietly and smoothly.
The Caged Ball system arrangement eliminates friction between the balls, and increases grease retention, thus giving the guides their low-noise, low-friction characteristics, and also ensuring long, maintenance-free working lives.
Caged Ball technology also means that, for a given load capacity, THK guides are smaller and lighter than their conventional counterparts.
THK, the leading global designer, developer and manufacturer of linear motion solutions, has introduced a number of additions to its proven range of performance linear motion guides. Designed for use in heavy and ultraheavy load applications, the linear guides are particularly suitable for the machine tool industry where high speeds, ultrahigh levels of rigidity, extremely precise positioning and long-term maintenance free operation are required. The LM guides have been introduced to extend the SNR, radial type model, and SNS, four-way equal-load type model, product ranges and, in each case, incorporate THK’s patented Caged Ball technology.
This improves overall performance, while significantly reducing levels of friction, heat and noise.
Indeed, so effective is the Caged Ball system that the noise levels have been reduced by more than 50%, with corresponding reductions in heat and friction.
Perhaps as importantly, the latest linear motion guides are capable of transporting exceptionally heavy loads, with the SNS in particular being rated up to 5530kN.
The latest versions of the SNR and SNS linear motion guides are available in larger rail widths of up to 85mm.
Both the SNR and SNS guides are available in six heavy duty models and six ultraheavy duty models and in lengths to suit all requirements.
In addition, a range of accessories are available to further enhance the performance of the linear motion guides, including THK’s unique QZ lubrication system, that gives significantly extended maintenance intervals with reduced usage of lubricants.
Also available are contact scrapers for applications where an additional level of contamination control and protection is required.
A new range of linear slides and guides has been launched by THK, the world’s largest dedicated developer and manufacturer of linear motion technology, for use in on- and off-road vehicles. Designed to help improve operating efficiencies and reduce the cost of ownership, while offering greater functionality, performance and safety than existing devices, the new linear products have the potential to be used in a wide range of transport systems, ranging from tail lift and trailer mechanisms, to earth moving plant and servicing and maintenance equipment. The new generation of products includes a range of robust ballscrews, for more rugged applications, and heavy duty linear guides.
In particular, the SNR and SNS linear guides have been introduced to provide a platform on which vehicle manufacturers and system builders can construct high quality, high performance linear motion and control mechanisms.
The SNR and SNS linear guides incorporate THK’s proven and industry-leading Caged Ball technology.
Compared with conventional methods of moving the slide carriage on the slide rail, this gives extremely smooth, high speed and maintenance free operation, yet provides an exceptional level of strength and rigidity to enable equipment systems to be positioned accurately, time after time, with a long operating life that is typically in excess of 40,000km.
Indeed, so effective is the Caged Ball system that when compared with traditional devices, rolling resistance is reduced by up to 90% and noise levels by more than 50%, with corresponding reductions in heat and friction.
Perhaps as importantly, the latest linear motion guides are capable of transporting exceptionally heavy loads, with the SNS in particular being rated up to 5530kN, are available in six heavy-duty models and six ultra-heavy-duty models, in a wide variety of stroke lengths.
For specialized on- and off-road and workshop systems, THK has also introduced a range of high performance HBN ballscrews that, size for size, are capable both of transporting over twice the average dynamic load of competing devices and of producing double the typical maximum nut speed (the DN value).
With load capacities of up to 3,390kN and operating speeds of up to 130,000DN, the HBN is especially suitable for applications that demand high-speed precision movement of larger loads.
The HBN again features THK’s Caged Ball technology together with a high-speed ball return system that eliminates ball-to-ball contact and ensures that all lubricants are retained; as a result, operation is smooth, silent and virtually maintenance free, minimizing frictional losses and helping to cut energy consumption by as much as 33%.
A range of accessories are available to enhance the performance of the latest linear motion devices, including the QZ lubrication system, that gives significantly extended maintenance intervals with reduced usage of lubricants, and contact scrapers for applications where an additional level of contamination control and protection is required.