Dovetail slides are a type of plain linear bearing — along with boxway slides and plain bushings made of plastic, composite, or bronze — that rely on direct contact between sliding surfaces to support a load. These differ from modern rolling element linear bearings, which use balls or rollers to reduce friction between the load-bearing […]
Compact Linear Induction Motor from H2W Technologies
H2W engineers have developed a compact Linear Induction Motor (LMAA-04-01) that can generate 10.6 lbs (47 N) of force at a 15 percent duty cycle. Operating at 208 VAC 3-phase 60 Hz, the synchronous velocity of this LIM is 160 in/sec (4 m/s). The LMAA-04-01 linear induction motor was designed for high speed operation; however, […]
THK to unveil new low inertia ballscrew-spline BNS-V during IMTS
At this year’s IMTS in Chicago (September 10 to 15) visitors can see in person THK’s latest ballscrew-spline BNS-V. Featuring an exceptionally compact and lightweight structure, the low inertia BNS-V enables quick starts and stops during high-speed operation. The BNS-V is a stroke-rotary unit with ballscrew grooves and a ball spline groove that cross one […]
What are the benefits of a rotating ball nut (aka driven nut)?
When you think of a ball screw assembly, you probably envision a screw shaft with a motor connected to one end. The motor turns the screw, and the ball nut travels along the length of the screw shaft. An alternative setup is to hold the screw shaft stationary and rotate, or drive, the ball nut […]
Case-hardened tapped or threaded shafts, ready to ship
Made in the U.S.A., NB’s shafts are never annealed, so outer diameters are ultra precise — tolerances are always reliable. Tapped shafts can be ordered with one or both ends tapped, in either case-hardened carbon steel or stainless steel. Threaded shafts can be ordered with one or both ends threaded, in case-hardened carbon steel. Diameters […]
New Sealed Electronic Actuator Simplifies Upgrade from Mechanical Actuation
Southco, Inc., a global leader in engineered access solutions has added to its line of electronic actuators with a sealed version that simplifies the upgrade from mechanical to electronic actuation. Capable of accommodating higher mechanical loads, the AC-EM 10 electronic actuator facilitates the electronic actuation of Southco’s R4-10 rotary latch series and other latching mechanisms. […]
Timken acquiring linear-motion supplier Rollon
The Timken Company, a world leader in engineered bearings and power transmission products, has reached an agreement with pan-European firm Chequers Capital and IGI Private Equity to acquire Rollon Group. A leader in engineered linear motion products, Rollon specializes in the design and manufacture of linear guides, telescopic rails and linear actuators used in a […]
What’s the difference between dynamic load capacity and static load capacity?
Rolling element linear bearings, such as round shafts and bushings, profiled rail guides, crossed roller slides, and even ball screws, have two load capacity specifications — dynamic load capacity and static load capacity — which are based on different operating parameters and performance criteria and are independent of each other. To accurately size and select a […]
LINAK linear actuators in medical sit-to-stand lifts facilitate rehabilitation
By 2050 there will be two billion people older than 60, according to the WHO … and 2035 will see a 12.9 million shortage of healthcare professionals. Fortunately, some new linear-motion technologies could help satisfy some of the growing need for healthcare, especially in the segment of the industry dedicated to patient rehabilitation. Consider one […]
When should you use a ball spline?
A ball spline is a type of rolling bearing linear guide, similar to a round shaft and bushing assembly, but with a critical distinction in its operation. The shaft of a ball spline is much like a linear guide shaft, except that the spline shaft has grooves along its length. The spline nut (analogous to […]
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