Retaining Rings

A Retaining Ring, also known as a Snap Ring or a Circlip, is a spring ring, usually split at one point so that it can be sprung open, passed over a shaft or spindle and allowed to close into a closely fitting annular recess or groove to form a collar on the shaft. A similar design can be closed to pass into a bore and allowed to spring out into a similar recess or groove to form a shoulder in the bore. Retaining rings are used to locate other items onto a shaft, locate the shaft to a fixed item or to prevent movement of items along the shaft. Retaining rings are available in a variety of shapes and sizes to meet particular assembly requirements.


Axially Assembled Rings

Axially Assembled Rings

Axially Assembled Retaining Rings are Tapered Section Rings that are designed for axial installation into machined grooves. These rings are either internal for installation in housings and bores, or external, for assembly on shafts. Once installed, they provide a protrusion or "shoulder" for retaining parts.
Constant Section Rings

Constant Section Rings

Constant Section Rings offer more clearance than Tapered Section Rings but generally accommodate less force. The Constant Section Ring, with its uniform material width, is elliptical when installed in the groove, making only a three-point contact. These rings are much harder to remove once installed. Constant section rings can be square, round or flat and can be notched to facilitate installation and removal. Constant section rings come in a variety of sizes for internal or external applications.
End Play Take Up Rings

End Play Take Up Rings

End Play Take Up Rings are Tapered Section Rings that are bowed and beveled. They are designed to compensate for accumulated tolerances in assemblies. Once snapped into the groove, bowed rings exert a force or a "preload" on the retained parts made to the low side of the tolerances "snugging" everything up. They also act like a spring and "give" when parts made to the high side of the tolerances extend too far into the groove. Beveled retaining rings feature a 15 degree beveled edge that is installed in a groove with a complementary angle. This angle allows the ring to wedge itself between the groove and the retained part until it can go no further, effectively "locking" everything in place.
Grooveless Retaining Rings

Grooveless Retaining Rings

Grooveless Retaining Rings press over studs, shafts or any round shape. The become an integral part of the axial application, replacing snap or bearing rings, cotter pins, staking, swaging, spinning, heat forming, ultrasonic, etc. Designed without slots or shears, grooveless retaining rings will not walk-off or spring free. They have a low-profile, flat design that requires a minimum of space and they require very little shaft for full anchor. They provide 360 degrees of bearing surface, come in a variety of sizes and are formed from stainless steel for excellent corrosion resistance.
Radially Assembled Rings

Radially Assembled Rings

Radially Assembled Retaining Rings are Tapered Section Rings that are radially installed into machined grooves on shafts. They don’t have lugs or lug holes and do not extend as far around the circumference of the grooves as their axial counterparts. Consequently, they can accommodate applications with lower thrust loads than those retained by axial retaining rings. They can be installed quickly with the appropriate applicator and dispenser tools.
Self Locking Rings

Self Locking Rings

Self-Locking Retaining Rings can be installed on a shaft or in a housing/bore without using a groove. They save machining time and overall costs since a groove is not needed for installation. They come in small sizes and can be used effectively and economically on small applications with very low thrust loadings. Most self-locking rings can not be easily removed once installed. External Shaft Friction Rings, External Radial Grip Rings, and Toothed "Push On" Rings are all examples of Self-Locking Rings.

APEX FASTENERS, Inc · 15858 Business Center Drive • Irwindale, CA 91706 USA
APEX Fasteners supplies standard and custom screws, nut retainers, shoulder screws, plastites and taptites, all types of rivets, spring steel fasteners and special stampings, sems screws in standard, fractional or metric to electronics, aviation and other OEM industries worldwide. ApexFasteners.com custom manufactures screw machine components for electronic enclosure hardware as well as cold forming and cold headed specials for assembly and production requirements.
Toll-Free Tel: 1-800-642-1333 · Tel: (626) 962-2219 · Fax: (626) 626-962-7729 · info@apexfasteners.com
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