Retaining Rings at Tractor Supply Co.

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Frequently Asked Questions About Retaining Rings

What size retaining ring do I need?

To determine the correct retaining ring size, measure the groove diameter, not the shaft or housing diameter. For external rings (on a shaft), measure the shaft groove root diameter. For internal rings (in a hole), measure the housing groove diameter. Also, measure the groove width and check for the required radial clearance.

Can retaining rings be reused after removal?

Retaining rings can often be reused, provided they are not stretched, bent or damaged during removal. However, it is generally safer to replace them because even the slightest fatigue or deformation can lead to premature failure.

Retaining Rings

Small but essential for hardware projects, retaining rings lock components onto shafts and inside bores without welding, threading or adhesives. Internal rings, external rings and E-rings are available at Tractor Supply to fit a range of common shaft and bore sizes.

Reliable Fasteners for Shafts and Bores

Retaining rings are fasteners designed to secure bearings, gears or pins onto a shaft or within a bore. A shaft transmits force or motion, while a bore is the cylindrical hole that houses these components. Once the ring snaps into its groove, it maintains steady pressure, preventing parts from moving out of place during operation.

Steel is the standard construction for retaining rings because it holds its shape under sustained pressure. Some external rings carry a phosphate coating, which adds mild corrosion resistance and helps retain lubrication. Common sizes in our selection run from 3/16 in. to 1-5/8 in., covering most shaft and bore dimensions used in motors, trailers and farm equipment.

External Retaining Rings and E-Rings

In motors, pipe assemblies and power equipment, two types of external retaining rings handle shaft-mounted applications differently. Standard external rings are fully circular and fit in a groove on the shaft's outer surface, locking components against sideways movement. Shaped to resemble the letter E, an E-ring clips into the same groove type but has an open shape that makes it faster to install and remove by hand. For heavy-load or high-vibration applications, standard external rings hold more reliably, while E-rings are the better choice when the job calls for regular disassembly.

Internal Retaining Rings

Different from external rings, internal retaining rings seat in a groove cut into the wall of a bore or housing rather than on a shaft. They hold components, such as bearings, seals or clips, in place and prevent them from working loose under pressure. Because the ring must expand outward against the bore wall, installation and removal require internal snap ring pliers, which are designed specifically to grip and spread these rings. Sizes range from 1/2 in. to 1-5/8 in., covering bore dimensions found in most motors, cylinders and mechanical housings.

Shop Retaining Rings at Tractor Supply

A single retaining ring holds a bearing in place, keeps a seal from shifting and stops a gear from walking down a shaft. Getting the size right matters because a ring even slightly undersized won't sit fully and can work free under load. Over time, that kind of movement can damage a bearing or cause a component to fail completely. Life Out Here runs on equipment that holds together, and we offer retaining rings, alongside a wide range of home improvement products, on our website and at your local Tractor Supply store.