A Guide to Circlips: Types, Standards, and Applications

When built in a groove, fasteners such as Circlips, Retaining Rings, and Snap Rings from the circlip manufacturer can hold components or installations onto a shaft or in a dwelling/bore. After it has been fastened in place, the exposed component will serve as a shoulder that will hold the specific element or installation.


Circlips provide solutions to a variety of issues, including clearance diameter, versatility, radial installation, tolerance take-up, and thrust load capacity.


In modern engineering design, components such as Circlips, Retaining Rings, and Snap Rings have become known to be essential elements.




In most applications, the part that must turn, spin, or pivot in order for a bearing to be used is required.

  • Electric Motors
  • Optical devices
  • Sprocket chains
  • Electronics
  • Turbines
  • Pistons
  • Vehicle construction
  • Brake adjustment
  • Roller/Wheel bearings
  • Gearing/Transmission
  • Clutches


Fundamental Types of Circlips


External Circlip Standard


Meets the requirements of BS3673 Part 4, the most prevalent standard for the kind of axial retainer used for shafts with grooves. In general, only metric sizes are made for shafts measuring between 3mm and 300mm. On request, one can get heavy-duty versions and a number of other lug combinations.


External Circlip Lugged


Conforms to DIN 983, can be axially connected to shafts that have grooves, and has a design that is similar to the normal one but has extra lugs that are evenly distributed around the outside diameter. This characteristic makes it easier to maintain excellent contact with radiused or chamfered components for shafts ranging in diameter from 16 to 140 millimetres.


Internal Circlip Standard


This style of axial retainer for bores with grooves is the most popular type, and it conforms to BS3673 Part 4, as well as DIN 472. For bore sizes ranging from 8mm to 360mm, metric sizes are the only ones that are typically produced.


Internal Circlip Lugged


Conforms to DIN 984, is axially fitted to bores with grooves, and has a design that is close to the normal one but has extra lugs that are evenly placed around the inside diameter. This feature makes it easier to maintain solid contact with radiused or chamfered components for bore sizes ranging from 16 to 170 millimetres.


E Type External Circlip


It complies with BS3673 Part 2 and DIN 6799, which is the standard for the most popular kind of radially fitted circlip for shafts with grooves. The groove diameter is the nominal dimension (not the shaft diameter), and it is available in inch sizes ranging from 0.052 inches to 0.940 inches and 0.8 millimetres to 30.0 millimetres for the grooves. The use of circlip pliers is not necessary for the installation.


Snap Rings


Axially fitted in shallow grooves as circlips are often done in traditional design. Components with small sections and light side loads often make use of this retention method. It is not necessary to use specialised fitting tools, compared to traditional circlips.


We hope this information answers your question about what circlips are and what they can be used for.


Get in touch with Circlips India, the top Circlip manufacturer in Mumbai, as soon as possible if you need any more information.