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Linear Motion Tips

Covering Linear Motion Systems, Components and Linear Motion Resources

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Linear drives (all)

What are fixed and floating bearings in the context of linear motion?

August 7, 2020 By Danielle Collins Leave a Comment

fixed and floating bearings

There are two instances when the terms “fixed bearing” and “floating bearing” are used in linear motion: to describe the support bearings used on ball and lead screws, and to describe linear guides mounted in parallel. And while the meanings of the terms are the same in both situations, their applications are different in each […]

Filed Under: Applications, Ball + lead + roller screws, Ball + roller guides, FAQs + basics, Featured, Linear bearings, Plastic + composite guides, Track roller (cam + wheel) guides

LinX M-Series electric actuators from ANCA Motion offer direct replacement of pneumatic cylinders

July 19, 2020 By Lisa Eitel Leave a Comment

Pneumatics (and compressed air) are indispensable in many industrial applications. They’re cost-effective and easy-to-understand technologies that are rugged enough to run in even very challenging environments. The problem is that some facilities can spend up to 30% of their electricity bill on generating compressed air. Because pneumatic actuators for linear motion (which have been an […]

Filed Under: Applications, Featured, Integrated Linear Systems, Linear actuators (all), Linear drives (all), Pneumatic cylinders Tagged With: ancamotion

THK adds high-speed SDA-V/SDAN-V caged ball screws to linear motion offerings

July 16, 2020 By Lisa Eitel Leave a Comment

THK’s new Type SDA-V/SDAN-V caged ball screw is engineered to enable the development of high-speed machine designs. Featuring newly developed circulation components, the Type SDA-V/SDAN-V picks up balls in the tangential direction and achieves a maximum rotational speed of 5,000 rpm — for a maximum DN value of 160,000. Torque remains stable even during long […]

Filed Under: Ball + lead + roller screws, Ball + leadscrew driven, Linear actuators (all), Linear drives (all) Tagged With: THK

How to specify pulleys for synchronous belt drives

June 17, 2020 By Danielle Collins Leave a Comment

belt and pulley dimensions

When designing a belt drive system, the first step is to choose the most suitable belt for the application. But the pulleys also play an important role in the performance of the belt — especially in synchronous belt drive systems, where proper meshing of the belt teeth with the pulley grooves can affect everything from […]

Filed Under: Belt + chain driven, Belt + chain drives for linear, FAQs + basics, Featured

How to account for shock and vibration loads in ball screw drives

May 7, 2020 By Danielle Collins Leave a Comment

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 […]

Filed Under: Ball + lead + roller screws, FAQs + basics, Featured

Tolomatic expands hydraulic-class electric actuator force range to 50,000 lbf

May 7, 2020 By Miles Budimir Leave a Comment

actuator

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, […]

Filed Under: Ball + lead + roller screws, Featured, Linear actuators (all) Tagged With: Linear Actuators, tolomatic

Linear guides, power transmission, actuators see unexpected applications

March 20, 2020 By Lisa Eitel Leave a Comment

Our 2020 survey of the industry indicates an unabated trend towards more automation of previously static or manually tended systems. Key to these new offerings is installation simplicity for OEMs and end users of linear components for linear axes … as well as positioning stages and Cartesian robots. In fact, Cartesian robots (also called linear […]

Filed Under: Applications, Featured, Integrated Linear Systems, Linear drives (all) Tagged With: nipponpulse

What are differential roller screws and how do they differ from planetary designs?

March 3, 2020 By Danielle Collins Leave a Comment

Traditional roller screws — sometimes referred to as planetary roller screws — can produce axial forces comparable to hydraulic cylinders, with the speed and precision capabilities of ball screws, at a price point that falls between the two. A variation of the planetary roller screw — referred to as a differential roller screw — reduces some […]

Filed Under: Ball + lead + roller screws, FAQs + basics, Featured

Synchronous belt materials: What’s the difference between urethane and neoprene?

February 24, 2020 By Danielle Collins Leave a Comment

Synchronous belts for linear motion applications — such as general transport conveyors or high-speed gantry positioning — are available in a wide range of materials suitable for virtually any application. The most common synchronous belt materials are neoprene and polyurethane, but specialty materials and backing surfaces are also available to address requirements such as temperature extremes, […]

Filed Under: Belt + chain driven, Belt + chain drives for linear, FAQs + basics, Featured

Acme or trapezoidal? What’s the difference between lead screw designs?

February 4, 2020 By Danielle Collins 1 Comment

Acme or trapezoidal

In power transmission applications, there are two primary types of screw drives: those that use recirculating balls or rollers, for applications that require high rigidity, excellent positioning accuracy, and high duty cycles, and those that rely on sliding contact, for applications that require corrosion-resistance, self-locking operation, and customizable nut designs. The second category — screw […]

Filed Under: Ball + lead + roller screws, FAQs + basics, Featured

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