Internal Spiral Retaining Rings

Borrelly Spring Washers designs, engineers and manufactures multiturn internal spiral retaining rings.

Our spiral retaining rings for bores and housings can be ordered from stock or custom-made upon request. They are available in a variety of dimensions (from 5 mm to 1000 mm diameter), number of turns (from 1 to 7 turns) and materials (Austenitic and Semi-austenitic steel, Inconel, Hastelloy, CuBe2, Duplex and Super Duplex).

Custom design request

Precision range

Borrelly 360 Spiral Retaining Rings

Bore range according to MA4017 standard

Technical description

Borrelly 360° internal spiral retaining rings are a type of retaining rings made from coiled flat wire with round edges. Designed without any ear and gap, they are an excellent alternative to stamped retaining rings, in particular DIN 472 circlips. They are manufactured with a notch, making them extremely easy to remove from a groove.

Our multi-turn internal spiral retaining rings can support medium to heavy loads and are designed to be axially installed within bores and housings to act as an artificial shoulder and provide a 360° retaining surface.

Bore retaining rings ordered from our precision range are manufactured under our EN 9100 quality management system and compliant with the MA4017 standards of the aeronautics industries.

Internal retaining rings from the Borrelly 360° range are extremely easy to install and remove and do not require any special tools or pliers. They can be installed using a simple assembly cone and removed with a standard screwdriver.

Their installation can be carried out manually, semi-automatically or automatically.

Easy installation and removal
360° retaining surface provided in multi-turn configurations
No special tools and assembly lugs needed
Standard and custom design options

Carbon steel

XC75 (DIN 1.1242)

Austenitic stainless steels

AISI 301 (DIN 1.4310)
AISI 302 (DIN 1.4310)
AISI 316L (DIN 1.4404)
AISI 316Ti (DIN 1.4571)

Structurally hardened stainless steel

17-7PH (DIN 1.4568)

Super alloys

INCONEL 625 (DIN 2.4856)
INCONEL X750 (DIN 2.4669)
INCONEL 718 (DIN 2.4668)
Alloy A286 (DIN 1.4980)
Hastelloy C4
Hastelloy C276 (DIN 2.4819)

Copper-based alloys

CuBe2 (DIN 2.1247)

Titanium

Titanium Grade 2 (DIN 3.7165)

Our Engineering & Design Department can help you choose the material best suited to your application.

Explore our catalog of materials and finishes

Internal spiral retaining rings are a trusted solution for many cases of applications across various industries, including in the automotive, aerospace, off-shore , medical and household appliances sectors. They are commonly used to maintain components in place and withstand high pressures and rotational speeds. Electric motors, valves, pumps, compressors, bayonet, aerospace and multi-pin connectors are examples of devices using spiral retaining rings for internal applications.

Custom internal spiral retaining rings

Thanks to its extensive experience and technical expertise, our Engineering & Design Department can help you in the design, engineering, and manufacturing of custom internal spiral retaining rings meeting your technical requirements, whether they are for prototypes, limited series or large runs. Our production workshop, fully integrated with production equipment designed and developed by Borrelly, can produce your own custom retaining ring in a very short amount of time.

Make a custom design request