NB Corporation’s EXRAIL linear guide has more rollers in less space than other linear bearings, which increases load capacity and disperses the load more evenly. It has longer rollers for greater contact surface and less contact pressure. In comparison to presently available linear guides, the EXRAIL slide guide provides smoother movement. It uses multiple small […]
Things to do this summer: Become a citizen scientist
As cities, states, and countries begin to reopen in the wake of the COVID-19 pandemic, many of us will still face restrictions for some time regarding what businesses and facilities we can access and where we can travel. This “new normal” means that most of us will still spend more time at home, or nearby, […]
Motion basics: How to define roll, pitch, and yaw for linear systems
Linear guides and systems — including Cartesian robots, gantry systems, and XY tables — are typically subjected to both linear forces due to downward, upward, and side loads and rotational forces due to overhung loads. Rotational forces — also referred to as moment forces — are typically defined as roll, pitch, and yaw, based on […]
Industry first: XY stage with 800 x 800 mm open center
Intellidrives now offers open-center XY stages with travel of 600 x 600 mm and open center dimensions of 800 x 800 mm. The demand for a high accuracy, robust, open-frame stages is met with Intellidrives dual-axis, large aperture stages, which address the unique needs of scanning microscopy, wafer and printed circuit board inspection, automated assembly, […]
Industrial Ethernet basics for mechanical engineers
Ethernet networks are ubiquitous in our daily lives — allowing computers in office, school, and commercial environments to connect to the internet, share files, and access printers and other hardware connected to the network. And there’s a reason Ethernet is so popular — it’s a simple, flexible network protocol that facilitates high-speed data transmission. But despite […]
How to account for shock and vibration loads in ball screw drives
Calculations of ball screw service life and permissible static load take into account loads and forces that are predictable and quantifiable — thrust loads due to acceleration, process forces, and forces generated when holding a load in place, for example. But some applications are also susceptible to loads caused by shock and vibration — loads […]
Tolomatic expands hydraulic-class electric actuator force range to 50,000 lbf
Tolomatic’s expanded extreme-force electric actuator family now includes the RSX128 actuator, rated up to 50,000 pounds of force (222.4 kN). Ideal for replacing hydraulic cylinders and designed for 100 percent duty cycle, the RSX actuator features Tolomatic’s precision-ground planetary roller screws for long, consistent operating life in challenging environments. Applications include assembly, metal fabrication (pressing, […]
PHD Inc. now sells Series ESU-RB ballscrew linear actuators
PHD Inc. now sells a new Series ESU electric actuator — the ESU-RB. This linear actuator incorporates a ballscrew and features a robust enclosed design with a high capacity rail-bearing system. These features let the actuator deliver exceptional moment and load capability. The ESU-RB electric actuator is available in three sizes with travels lengths up […]
When do you need to consider thermal expansion in linear guide systems?
Most materials used in linear systems have a positive coefficient of linear thermal expansion — that is, when their temperature is increased, they expand in length, and when their temperature is decreased, they contract in length. One notable exception is Kevlar, the aramid from DuPont, which is sometimes used for tensile cords in toothed belts. […]
Linear motion in medical applications: Linear actuators in patient lifts, beds, and tables
Moving a patient in a hospital or medical facility doesn’t always involve racing down a hallway with the patient in a wheelchair or on a gurney. Very often, a patient simply needs to be moved from a lying or sitting position to a standing position (or vice-versa). Even for patients who possess some degree of […]
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