Linear bearings that use balls or rollers to carry a load are subjected to Hertz contact stresses — a type of material stress that plays a significant role in determining the bearing’s load capacity and fatigue life. When two surfaces of different radii are in contact and a load is applied (even an extremely small load), […]
Linear motion trends in slides: Robotics and mobile designs lead the charge
Demand for simple-to-install and pre-integrated linear-slide systems continues unabated … especially in applications only recently automated. Here’s the perspective of Matt Mowry, North American market manager for drylin products at igus: “We’ve supplied fully assembled and customized linear-slide tables … complete with motors and accessories. We’ve also supplied custom-extruded linear profiles and bearing liners to […]
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 […]
DESTACO Robohand OEM linear table slides for machine tending and part transfer
DESTACO now sells cost-effective OEM gripping setups … and the new T110 linear pneumatic table slides complement the G110 gripper series favored by OEMs. Together, they deliver improved speed and reliability versus comparable products on the market for high-speed machine part-transfer, pick-and-place operations, and machine tending applications. Engineered for better performance, lower maintenance and faster operation, […]
Gallery: Crossed-roller slide variations and uses
Precision rail guides known as crossed-roller guides (also called crossed roller slides, linear bearings, or ways) are linear-motion load supports that incorporate arrays of cylindrical roller bearings for the reduction of friction. These crossed-roller slides contain the rollers between solid twin guide bars (usually made of through-hardened tool steel) cut with V-shaped grooves that are […]
When to consider crossed roller slides
When an application requires a linear guide with high load capacity, high stiffness, and good travel accuracy, the range of suitable products is typically narrowed down to two designs: recirculating linear guides and crossed roller slides. Where recirculating linear guides use balls to support the load, crossed roller slides use rollers. The rollers ride in […]
Del-Tron Precision now has ISO 9001:2015 Certification
Linear-motion manufacturer Del-Tron Precision, Inc. has earned ISO 9001:2015 certification. The comprehensive system audits covered every aspect of operations. “Any company that has been through the certification process knows that achieving ISO 9001:2015 certification is demanding,” said Ralph McIntosh, President of Del-Tron Precision, Inc. “Each individual in our operation must be wholly dedicated to the […]
What are the differences between plain and rolling linear guides?
A linear guide (or linear bearing) is a mechanical element that allows relative motion between two surfaces, with one surface supporting the other, and minimum friction between the two. There are two basic types of linear guides: plain and rolling element. While their general function is the same, their design and performance differ significantly. Linear […]
The top 10 Linear Motion Tips articles of 2015
With the range of technologies, designs, and options available for linear motion components, ploughing through the alternatives and making the best decision takes more time and resources than many designers and engineers are able to expend on any individual component. Looking back at the top 10 most-read Linear Motion Tips articles of 2015 confirms this situation. From primers on […]
What is a crossed roller slide?
As their name suggests, crossed roller slides (also referred to as crossed roller bearings) are linear bearings that use cylindrical rollers—as opposed to balls—to carry a load. The rollers ride between parallel guides in which v-shaped grooves have been ground. The term “crossed” refers to the fact that the rollers are arranged in a crisscross […]
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