Linear bearings are present in everything from the linear guides on your desk drawers to machining tools dispensing machines and automated assembly equipment. The vital principles of linear bearing systems for machining—low friction, high durability and high repeatability—are the same for your relatively fragile desk drawer, just on a different scale.

Because there is such a wide variety of linear bearing manufacturers, standardization is rare. Approach every linear bearing purchase as if it were a custom order to ensure you get the proper linear bearings to fit your needs. Before you make an order, gather the following information:

1. Applications for which you need linear bearing systems

2. Specific information about the linear motion bearings you need; at a bare minimum, dynamic load capacity, length and width

3. Knowledgeable maintenance staff at your disposal and how much they cost you

Action Steps
The best contacts and resources to help you get it done

Choose between desk rollers and heavy duty linear bearing systems

Knowing what your linear motion systems will be called on to do will guide you to the right linear bearing manufacturers. Do you need lightweight bearings for cabinet and desk drawers or are you buying heavy duty industrial equipment?

I recommend: Accuride International Inc., produces a wide variety of linear slides suitable for office equipment, furniture, and storage uses. Techno Inc., produces linear rails and bearings for dispensing, inspection, testing, assembly and lightweight automation. NSK Corporation's product line includes heavier duty linear bearing systems ideal for machining and other applications that demand a high load capacity.

Ask your technical folks for more about the linear ball bearings you want

Now's the time to consult with your technical or engineering department about the specs for your linear bearing system. If they can't tell you what you need to know--or if you don't have the proper experts in place--you might get some help from the linear bearing companies themselves.

I recommend: Motion Industries lets you search for bearings by diameter, housing elements and other specifics. If you're lacking in-company technical support, LinTech maintains electrical and mechanical engineers on staff to help you choose the right product.

Order linear bearings that fit your maintenance needs

The final thing you must consider before you buy linear bearings is your company's maintenance capabilities vs. the product's maintenance needs.

I recommend: If your company doesn't have staff capable of cleaning and lubricating bearings on payroll, you can consider purchasing maintenance-free bearings from Norglide for light applications, or look to Oiles America Corporation for a variety of heavier duty self-lubricating bearings.

Tips & Tactics

Helpful advice for making the most of this Guide

• •  Be sure to inquire about maintenance programs, service plans and guarantees before you buy linear bearings. You might find a company that's willing to give you extras in order to win your business.