“New Design” pillow blocks and flange blocks from LM76 feature a lubrication fitting and an alignment set screw in the pillow blocks and flange blocks. The stainless steel and self aligning linear bearings are modified by having an alignment flat ground on the bearings’ outer shell and drilling a hole through the outer shell. Lubricants […]
Linear motion FDA wash-down compliant components selection guide from LM76
A helpful component selection guide from LM76, “Linear Bearings, 6 Simple Steps – FDA Compliance, Wash Down Compliance,” details the linear motion components available from LM76 that are FDA/UDSA/3A-Dairy compliant. Included are: Foodstream electrodeless nickel plated pillow blocks, PTFE lined stainless steel bearings, ceramic coated linear bearings, self-aligning corrosion resistant linear ball bearings, and Thomson® […]
Pegasus Series 1 corrosion-resistant linear bearings from LM76
LM76 has developed the most corrosion resistant linear bearing available. The Pegasus Series 1 Linear Bearings feature Silicon Nitride (SiNi) Ceramic Balls in a shell with retainer and end caps all made from 440 Stainless Steel and then ArmorloyTM coated. In space, deep under the sea, or in the harshest environments when there can be […]
Moment of inertia: area or mass?
Moment of inertia is an important parameter when sizing and selecting a linear system. But it’s critical to know which type of inertia—planar moment of inertia or mass moment of inertia—is given and how it affects the performance of the system. Planar moment of inertia Planar moment of inertia (also referred to as second moment of […]
A glossary of linear guide terminology
The term linear guide covers several categories of products, from plain bearings to ball bushings and recirculating roller bearings. To compound the potential for confusion, many terms are used interchangeably, or are so generic (take linear guide for example) that they could refer to any one of several different products. And this doesn’t apply to just […]
When should you use dual guide rails?
Linear guide rails and bearings offer high stiffness and good travel accuracy. And they can support not only downward, upward, and side loads, they can also withstand overhung, or moment loads. Of course, the larger the linear rail and bearing system, the more moment capacity it has, but the arrangement of the bearing raceways—face-to-face or back-to-back—also […]
Tips for preventing linear bearing corrosion
Corrosive environments can include anything from detergents and chemicals for washdown (the high-pressure cleaning of equipment), to acid baths and their related vapors, to chemicals in food processing. Because profiled linear rails, round shafts, and ball screws are made primarily from steel components, they’re highly susceptible to corrosive agents, which can quickly cause rust, pitting, […]
What are miniature profiled rails?
Profiled rails have high load-carrying capacity for their size. But when smooth, precise motion is needed and the load being moved is not very high, they can be overkill for the application. That’s why most profiled linear guide manufacturers now make miniature versions, with many of the same performance benefits and features of standard sized […]
Seven Interchange Tools for Linear Guides and Bearings
In linear motion, there are few types of components that are truly interchangeable—that is, where a product from one manufacturer is a dimensional and technical replacement with a product from another manufacturer. In fact, only linear ball bearings (bushings) and shafts are commonly interchangeable between manufacturers, with very few dimensional and technical differences. Not only […]
How do self-aligning linear bushings work?
Linear bushings, also known as ball bushings, are linear bearings that ride on a hardened, round shaft to provide linear guidance with low friction. The first linear bushing designs were patented in 1945 and became commercially available in the 1950’s. Until the introduction of profiled rail linear guides in the 1970’s, linear bushings served as the […]
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