How to Look Up a U-Joint By Size

22 Jul.,2024

 

How to Look Up a U-Joint By Size

Do you need to replace a U-joint but don&#;t have the part number? Don&#;t fret. We have just the solution for you: our U-joint lookup tool. All you need are the u-joint type and the measurements.

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To give you the peace of mind that you&#;re getting the absolutely correct replacement U-joint, we&#;re going to discuss the different types of U-joints, how to get the right measurements, and how to use the GMB U-joint lookup tool.

The 5 Different Types of U-Joints

The type of the U-joint is characterized by the bearing cup style on all four ends. There are 3 different bearing cup styles:

  1. Plain: The bearing cup is plain with no plates or grooves.
  2. Plate: There&#;s a plate attached to the end of the bearing cup for mounting.
  3. Grooved: There&#;s a groove at the bottom of the bearing cup, which is found on U-joints with inside snap rings.

Three of the five types of U-joints have the same bearing cup style on all four ends: 4 plain, 4 plate, and 4 grooved. The remaining two types come with a mixture of two bearing cup styles: 2 plain/2 plate and 2 plain/2 grooved.

You can figure out the U-joint type you have by examining the bearing cup style on all four ends.

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How to Measure Your U-Joint

You need calipers to make accurate measurements. Calipers provide great precision because it&#;s equipped to measure down to the thousandth of an inch. To use calipers with a U-joint, place both end points tightly between the caliper jaws to get an accurate measurement. Here&#;s a great GMB tutorial on using calipers. You&#;ll need to have the end caps pushed firmly onto the cross to get an accurate width measurement.

Each type of U-joint comes with its own set of measurements. You can check the GMB U-joint lookup tool for a diagram on how to measure each type.

Using the GMB U-Joint Lookup Tool

The process is pretty straightforward. In the drop-down menus, enter the type and then all the required measurements. Next, take a look at the list of the available GMB U-joints that match the specs you entered (it&#;s at the bottom of the page). The GMB part number is listed, as well as the type and all the measurements. We strongly suggest double checking the specs to make sure you have the right U-joint.

We hope this tool has helped you find the right U-joint without a part number! Please contact us if you need any assistance determining your U-joint type, measuring your U-joint, and/or using the lookup tool.

U-Joint Identification | Types of U-Joints Explained

U-Joint Bearing Cap Sizes

When we are discussing the various bearing cap sizes of a u-joint it is important to note that the measurements between the different u-joint cap sizes are minimal and can be tough to confirm with a tape measure or ruler, which is why we recommend a set of calipers for precise measurements that are easy to confirm. But just what is a bearing cap on a u-joint? The bearing cap, sometimes referred to as a bearing case, on the standard single cardan u-joint is found at the end of each leg of the main u-joint body. These bearing caps feature a machined pocket that holds hardened needle roller bearings (and grease) for the bearing cap to rotate around the u-joint body. The bearing cap is a press fit into the driveshaft yoke and is retained by internal or external snap rings. A grease seal is fitted to the bearing cap to keep dirt and other contaminants out of the needle roller bearings and the grease in for a long service life.

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