Retaining Components
Retaining components such as circlips (retaining rings), E-clips, snap rings, split pins, R-clips, keys and lock washers locate and secure parts on shafts and in bores. We supply DIN/ISO standard sizes and special retaining parts.
What it is
External circlips (DIN 471) fit grooves on shafts; internal circlips (DIN 472) fit grooves in bores; E-clips (DIN 6799) snap on radially. Keys (DIN 6885) transmit torque between shafts and hubs, and split pins lock slotted nuts and clevis pins.
Groove dimensions must match the retaining ring standard for full load capacity.
Typical applications
- Bearing and gear retention on shafts
- Pins and clevis retention
- Hub-to-shaft torque transmission (keys)
- Locking nuts (split pins)
- Assembly retention in housings
Materials & grades
- Spring steel (phosphated or plain)
- Stainless steel
- Carbon steel (keys)
- Phosphor bronze (special)
Points to consider
- Machine grooves to the ring standard dimensions.
- Use stainless retaining rings in corrosive environments.
- Circlip pliers are needed for installation.
- Key size follows shaft diameter per standard.
Frequently asked questions
What is the difference between DIN 471 and DIN 472 circlips?
DIN 471 are external rings for shafts; DIN 472 are internal rings for bores.
How do I choose a key size?
Key width and height follow the shaft diameter per DIN 6885 / IS 2048.
What is an E-clip?
A retaining ring pushed radially onto a shaft groove, installed without pliers (DIN 6799).