Understanding Encoders: Integral Bearing vs. Without Integral Bearing

Some rotary encoders have integral bearings, and others do not have them. Knowing the differences between the different types of rotary encoders will help you make a more informed decision.

With Integral Bearings

These types of encoders have a stator coupling and integral bearings. The encoder has a graduated disk, which connects to the shaft you need to measure. There is a scanning unit that ball bearings hold on the shaft. The stator coupling supports it. As the shaft accelerates angularly, the stator coupling only has to absorb the torque from the bearing’s friction.

The advantage of the process is that it reduces the dynamic and static measuring errors. Plus, the stator’s coupling compensates for axial motion in the measured shaft. Plus, many users find it is easy to mount the tool.

It is possible to have a hollow through the shaft, and the overall length is short. There is a high natural frequency of the coupling.

Sometimes, companies that make rotary encoders that have integral bearings design them for separate shaft coupling. These might have solid shafts in them. There may be a recommended coupling to the measured shaft, which can compensate for axial and radical tolerances. If there is an angle encoder with a separate shaft coupling, faster shaft speeds are possible.

About Optical Rotary Encoders Without Integral Bearings

Encoders that do not have integral bearings operate without any friction. They consist of the scale disk, tape, or drum, and the scanning head. When a company assembles them, they adjust the components to work together seamlessly. These encoders have several advantages, including the fact that they work well with high shaft speeds. Plus, the hollow shaft has a large diameter. They also do not have any extra starting torque.

Using Your Encoders

If you have an integral bearing and stator coupling, you will connect the shaft and graduated disk together. The stator coupling can support the scanning unit as you guide it on the ball bearings. Your stator coupling absorbs the rotation from the friction of the bearing. That is angular acceleration. It reduces both static and dynamic errors, ensuring a precise result.

Choosing the Right Distributor of Optical Rotary Encoders

It is critical to choose the right rotary encoder distributor. Maintenance Diagnostic Systems, Inc. is one of the top suppliers in the area and has quality products to meet your company’s needs. By choosing a quality distributor, you can make precise measurements, no matter the application.

The encoders come from HEIDENHAIN, which is one of the best manufacturers. We are happy to help you learn how to use the products at your facility. Please contact us today to learn more about our optical rotary encoders.