Special Coverage


Coming Soon - Photo-Chemical Machining (PCM) of metals…faster & more cost effective than you’d think!

Photo-Chemical Machining (PCM) or photo-etching of metals is a mature process used to create very accurate metal components. This process emerged in the 1960s as an offshoot of the printed circuit board industry. PCM can produce highly complex parts with very fine details, quickly, accurately and economically. Photo etching is a cost effective alternative to stamping, punching, laser cutting, water jet cutting, or electrical discharge machining (EDM) of thin gauge precision parts.

Posted in: Upcoming Webinars, Metals


Lubrication Considerations for Bearings

Bearings must be properly lubricated for optimized performance and long service lives, so choosing the correct lubrication is an integral consideration for engineers. AST Bearings’ tribological team has created this comprehensive whitepaper to best explain these lubrication considerations in rolling element bearings. The paper examines types of bearing lubricants (oil, grease and solid film), bearing lubrication methods, bearing lubrication shelf life, and a detailed table showing common bearing lubricants and properties.

Posted in: White Papers


Robust Gimbal System for Small-Payload Manipulation

This is a low-mass, small-volume gimbal unit. NASA’s Jet Propulsion Laboratory, Pasadena, California Spaceborne gimbal systems are typically bulky with large footprints. Such a gimbal system may consist of a forked elevation stage rotating on top of the azimuth motor, and occupy a large volume. Mounting flexibility of such a system may be limited.

Posted in: Articles, Briefs, TSP, Motors & Drives


Cooling Test Samples With a Combined Convective and Conductive System to Rapidly Reach 77 K

This innovation enables rapid cooling to 77 K of James Webb Space Telescope shields, which enables hypervelocity impact testing with micro-particle spheres. Lyndon B. Johnson Space Center, Houston, Texas In this innovation, a team successfully developed and implemented a combined convective and conductive cooling system that permits rapid cooling. Using a spray system, liquid nitrogen (LN2) was injected into a test article enclosure located in the target tank that was evacuated to a lower pressure than the surrounding ambient pressure of the White Sands Test Facility (WSTF). According to the saturation curve for nitrogen, temperatures lower than 77 K can be achieved by using the evaporative process as long as the pressure remains above the triple point where nitrogen ice is formed.

Posted in: Articles, Briefs, TSP


White Paper: Alternative Linear Motion Solution

Learn how Nexen’s Roller Pinion System (RPS) delivers a revolutionary alternative to today’s linear motion solutions – with unlimited run length, superior positional accuracy, zero backlash and more.

Posted in: White Papers


Unique Method for Orifice Production

To produce accurate, repeatable orifices, all the variables that might influence the Cd Value (Coefficient of Discharge) must be controlled during production. This includes the orifice hole length, edges, surface finishes, roundness and the elimination of all tool marks, burrs, ragged edges and irregularities. If any one of these areas is not perfectly managed, the orifice flow rates will vary from piece to piece thereby making it impossible to predict flow with any accuracy.

Posted in: Mechanics, White Papers, White Papers


Variable-Sweep-Wing Aircraft Configuration

There are significant improvements in structural, aerodynamic, and energy efficiency. Ames Research Center, Moffett Field, California Efficient aircraft designs are increasingly desired in order to support the continued growth of the air transportation industry. Continued expansion of this vital mode of transportation is threatened due to concerns over ever-increasing emissions, noise, and the demand for fuel. Current airport runway, ramp, and terminal facilities are increasingly constrained by encroaching growth and neighborhood environmental issues. The challenges associated with ever-increasing demand for air travel will require the development of aircraft that can fly efficiently over wide speed ranges, minimize their environmental impacts, offer the potential for sizing and growth relative to market demand, and make efficient use of constrained airport and airspace resources.

Posted in: Articles, Briefs, Aviation, Energy Efficiency