Clock Springs

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The coils of a clock spring are formed by winding spring wire around a cylinder into helically shaped metal springs. There are two coil types for clock springs: tight coils and open coils. Clock springs with tight coils are, in normal applications, completely without friction. Tight coil clock springs are often used as locking mechanisms. Read More…

Clock Springs Clock springs, or power springs, are helically wound springs that are naturally inclined to expand; the expansion generates torque, or circular movement. However, once the expansion occurs and the spiral length has run out, the clock spring must be rewound.

Leading Manufacturers

Bloomingburg, OH  |  740-437-7614

At Bloomingburg Spring & Wire Form, we manufacture custom compression, extension, torsion and double torsion springs, clock springs, wire forms, stampings and wire assemblies. Materials used include stainless steel, brass, bronze and other exotics by request. If you need immediate help, contact our 24-hour RUSH emergency service. Let us tame your biggest spring problem for you!

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Bloomingburg Spring & Wire Form $$$

Woods Cross, UT  |  801-298-0113

We have an extensive product list consisting of compression springs, torsion springs and extension springs. Medical, mechanical, custom, miniature, die, heavy duty, valve and wire springs are all manufactured by us to customer specifications. Call us today for your spring manufacturing needs.

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Spring Works Utah $$$

Norristown, PA  |  888-701-7180

As a small manufacturing firm of precision springs and wire forms, we pride ourselves on the personal attention and time we give to each customer. We specialize in Specialty and Prototype Spring and Wire Forms. We will produce Prototype samples for testing prior to full order production. We offer competitive pricing and quick turnarounds on both our large inventory of Stock Springs as well as on Customized Parts. Visit our website and call us today for more information!

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Tricor Industries, Inc. $$$

Tulsa, OK  |  800-540-9473

Action Spring has the experience and the expertise to manufacture dependable springs and wire forms for your application. Industries served include aerospace, electronics, recreational, and more. We can manufacture a variety of springs ranging in sizes from .003 to .500., and are able to produce almost any shape and size that a customer may need.

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Action Spring Co. $$$

Brooklyn, NY  |  888-777-4647

Lee Spring is a global manufacturer of stock catalog springs and custom designed parts including compression springs, extension springs, torsion springs, wave springs and Belleville washers. Extensive capabilities in size, configurations and materials. We want to help you with all your spring needs. Give us a call today or visit our website for more information.

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Lee Spring® $$$
placeholder image Bloomingburg Spring & Wire Form Spring Works Utah Tricor Industries, Inc. Action Spring Co. Lee Spring®

Clock springs with open coils are the most common type and must be mounted in housings. Open coil clock springs offer a low increase of force and are often used in applications such as retractable reels, retracting seat belts, mechanical motors, tape measures, timing devices, vehicle suspensions, galvanometers and electrical switches.

Typical industries that utilize clock springs include military, medical, automotive, electronics, agricultural, commercial, industrial and utilities. Clock springs are most commonly made from a certain type of spring steel referred to as either blue steel or clock spring steel. Blue steel is tempered and polished spring steel, which has a very high carbon content and is generally dark blue in color.

Small Clock Springs Clock Springs - All-Rite Spring Company

Clock springs consist of a flat coil strip and are wound, either tightly or openly, similar to a snail shell in that each coil is nested within a larger coil. Flat coil strips provide a stronger spring than round wire, although round wire is more commonly used in springs. Often, clock springs are wound and mounted on an arbor, which is a piece of round stock that has one end formed to accept the inside end of the clock spring, while the outside end is attached to a stationary post.

The power spring is also housed within a cylindrical casing, or barrel. The clock spring is wound by turning the arbor, but it drives the object’s movement by the barrel; this arrangement allows the clock spring to continue powering the object while it is being wound. Winding the object turns the arbor, which tightens the clock spring, wrapping it closer around the arbor.

Clock springs are most commonly formed through the cold rolling process. A type of roll forming, cold rolling utilizes roll forming machines, which consist of sequences of calenders, or roller die pairs, positioned both above and below the metal coil that is being formed. As the metal moves through the machine, the rollers bend the material along the linear axis, pressing the metal into a more uniform grain flow while shaping the metal into flat coil strips.

Cold rolled clock springs are created at temperatures below the recrystallization point of the metal. The cold rolling process increases the tensile strength of the metal. The clock springs are then annealed, or made softer through heating, so that they can be wound or coiled. Next, the clock spring is heat treated in order to reduce stresses and fractures and thus further strengthen the spring.

Clock Springs Informational Video