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Linear Motion Tips

Covering Linear Motion Systems, Components and Linear Motion Resources

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Linear bearings

Nook Industries sells family business to Altra Industrial Motion Corp.

January 3, 2022 By Lisa Eitel Leave a Comment

Nook Industries, a leader in US engineered linear motion products and solutions, announced today that it has sold the family-owned business to Braintree, Massachusetts-based Altra Industrial Motion Corp. (Nasdaq: AIMC), a leading global manufacturer and supplier of motion control, power transmission and automation products. The Nook business, which will be integrated into Altra’s Thomson operating […]

Filed Under: Linear bearings, Slides + guides (all) Tagged With: nook

Contact angle: What is it and how does it affect linear bearing performance?

December 10, 2021 By Danielle Collins Leave a Comment

contact angle and load distribution

In profiled rail linear guides that use balls or rollers, the geometry and arrangement of the bearing raceways play a significant role in the bearing’s load capacity, friction, rigidity, and ability to withstand errors in mounting. But there’s another aspect of a bearing’s design that also plays a role in its load capacity and rigidity […]

Filed Under: Ball + roller guides, Crossed-roller slides, FAQs + basics, Featured, Linear bearings

How to choose a lubricant for recirculating linear bearings

December 3, 2021 By Danielle Collins Leave a Comment

All metal-on-metal recirculating bearings require lubrication in order to function properly and provide a reasonable bearing life. Lubrication reduces friction and heat by separating the rolling elements from the bearing raceway, inhibits corrosion, protects bearing surfaces from contamination, and helps seals run smoothly and operate effectively. Although the importance of lubrication is clear, choosing the best […]

Filed Under: Applications, Ball + roller guides, Crossed-roller slides, FAQs + basics, Featured, Linear bearings

Motion basics: What is ball conformity in linear guides and screws?

August 26, 2021 By Danielle Collins Leave a Comment

ball conformity

In linear guides and ball screws, load-carrying balls or rollers can ride on planar (flat) raceways, as with non-recirculating linear roller bearings, or in curved raceways, as with ball screws and profiled rail guides. When a ball or roller rides on a planar raceway, the contact between the rolling element and the raceway will be […]

Filed Under: Applications, Ball + lead + roller screws, Ball + roller guides, FAQs + basics, Featured, Linear bearings

Motion basics: What is differential slip and how does it affect linear bearings?

August 18, 2021 By Danielle Collins Leave a Comment

differential slip

Linear bearings that use balls or rollers are typically chosen for their ability to carry high loads with very low friction. But rolling elements — including linear bearings — are not friction-free. One of the factors that contributes to friction in linear bearings (along with properties such as surface roughness, elastic hysteresis of the materials, and […]

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

Mechanical properties of materials: Hardness

August 8, 2021 By Danielle Collins Leave a Comment

hardness testing

Hardness is a common specification for linear shafts and guides — especially those used with ball and roller bearings, where the guide encounters extremely high loads over very small areas. The hardness of a bearing surface can significantly affect the life of the system and is often accounted for by applying a hardness correction factor […]

Filed Under: Applications, Ball + lead + roller screws, Ball + roller guides, Crossed-roller slides, FAQs + basics, Featured, Linear bearings, Rack + pinion sets

SCHNEEBERGER announces SFERAX Type H.L. linear ball bearing

March 8, 2021 By Kelsey Zebrowski Leave a Comment

SCHNEEBERGER Inc. has announced the availability of the new SFERAX Type H.L. linear ball bearing — featuring high-quality engineering at a competitive value point. Developed to support a linear bearing under high loads and high radial torques, the new SFERAX Type H.L. linear ball bearing is ideal for uses ranging from peripheral devices to assembly […]

Filed Under: Linear bearings Tagged With: Schneeberger

Gothic arches, tracks, and roller bearings in the context of linear motion

January 27, 2021 By Lisa Eitel Leave a Comment

Industry terminology used to describe linear guides and other linear components widely varies. Here we explain three linear-guide phrases and words having multiple meanings — and differentiate how they relate to track-roller linear guides and profiled-rail linear guides. Let’s start by reviewing the multiple linear-motion meanings for Gothic-arch linear bearing. Gothic arches originate from civil […]

Filed Under: Applications, Ball + roller guides, Editor's blog, Featured, Linear bearings, Slides + guides (all)

How to make linear motion systems cleanroom compatible

January 22, 2021 By Danielle Collins Leave a Comment

linear motion cleanroom

While we often talk about the importance of keeping contamination out of linear motion components such as linear guides and screws, when these systems are used in a cleanroom, the goal is just the opposite — to keep these components from introducing contamination into the environment. What exactly is a cleanroom? According to ISO 14644-1:2015, […]

Filed Under: Applications, Ball + lead + roller screws, Ball + roller guides, FAQs + basics, Featured, Linear bearings

Anti-friction miniature linear guides from PM B.V. now come with a variety of cage options

January 15, 2021 By Lisa Eitel Leave a Comment

When building miniature linear-motion systems, design engineers can choose between ball and crossed-roller linear guides.  When applied to precision systems, most all of these linear guides have cages to prevent shifting of the anti-friction rolling elements during operation … especially when these linear guides are applied in exacting microscopy, manipulator, and image-scanner applications — for […]

Filed Under: Crossed-roller slides, Featured, Industry news, Linear bearings, Slides + guides (all) Tagged With: PM

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