Power transmission screws—ball screws and lead screws—are typically used for converting rotary motion to linear motion. But when a load is applied axially to the nut, they do the opposite and convert linear motion to rotary motion. This is known as back driving, and is generally an unwanted effect. Although it can occur regardless of the […]
Ball + lead + roller screws
Klüber Lubrication introduces customized lubricant for actuators
Klüber Lubrication, a worldwide manufacturer of specialty lubricants, has introduced Klübersynth BR 46-32 F and Klübersynth BR 46-82, a series of specialty lubricants for the lifetime lubrication of actuators, which match the service life requirements of the automotive industry. Actuators are power transmission elements that convert electrical signals into mechanical movement. However, for dependable actuator […]
Rexroth ball-screw assemblies increase service life by 80%
Bosch Rexroth now offers an 80% increase in the service life of its ball-screw assemblies thanks to continuously improved production processes. Design engineers can use smaller sizes for the same power requirements. Delivery times have also been shortened through the digitalization of engineering process, as well as optimized logistics. As a leading manufacturer of linear motion technology, […]
Leadscrews: Motion system mainstays
Among the methods available for converting rotary motion to linear, leadscrews are a mainstay. A leadscrew, or power screw, is a threaded rod or bar that translates rotational motion into linear motion. Leadscrews generate sliding rather than rolling friction between a nut and the screw. Consequently, higher friction means a lower overall efficiency. And efficiency, […]
When do you need a ball screw?
The gap is narrowing between applications that require ball screws and those that are suitable for lead screws, and it’s becoming more difficult for engineers and designers to determine which technology is best for their machine. Advances in lead screw designs and materials have given them higher load capacities and better positioning accuracy, making them a sound choice […]
Nook Industries sells precision-rolled metric ballscrews with higher lead accuracies
Nook Industries, an innovator of linear motion components and systems, now sells a complete line of precision metric ball screw products. The PMBS line is an affordable rolled-ballscrew alternative to expensive ground thread products manufactured overseas. From aerospace to tool-making, the line can move significant loads and masses with great precision. More after the jump. Features for the […]
Drive nut runs on threaded shaft
Amacoil-Uhing model RS drive nuts provide smooth backlash-free linear motion in machine design. Unlike a screw, the RS drive nut runs on a smooth shaft. This eliminates the potential for debris to become trapped in threads which could then clog or jam. If material does fall onto the shaft, it is easily removed by wiping the […]
Exposing the myth of zero-maintenance ball screws
Surface degradation due to friction typically arises from lubrication problems. Linear-motion designs that address this problem are realistic, effective, and affordable. By Bruce Gretz, Executive V.P. | Steinmeyer Inc. Maximizing uptime and avoiding downtime for unscheduled maintenance are key to productivity. Mechanical wear of moving parts, particularly the positioning systems, is the most common reason […]
Precision ground ball screw options for linear motion applications
by John Feitl, Senior Application Engineer and Larie Butler, Marketing Communications Specialist, NSK Americas Ball screws have an efficiency that makes them suitable for use in actuators that drive industrial and automotive applications, including robotics, machine tool axes, and semiconductor wafer-transport systems. Here we review the different ball screw subtypes and where each one excels. […]
Steinmeyer Xi-Plus line of precision ball screws: Smoothest raceways ever deliver quiet performance
Steinmeyer now sells a new ball screw line called Xi-Plus. These screws feature the manufacturer’s smoothest raceway surface ever to get significantly quieter operation with reduced vibration for every application. More after the jump. Xi-Plus precision ball screws are manufactured in Germany like all Steinmeyer products. The ball screws undergo a proprietary finishing process that removes micron-sized defects […]