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Spring-Loaded Devices

Carr Lane Mfg. offers a comprehensive, industry-trusted selection of spring-loaded devices designed for positioning, indexing, securing, and detent applications across manufacturing and assembly environments. Available in a variety of sizes, spring force options, and body materials, including steel, stainless steel, and Delrin®, these components are ideal for applications that require quick and repeatable alignment or controlled force for positioning and holding.

Carr Lane Mfg.'s industry-leading line of spring-loaded devices includes:

Spring plungers
Ball plungers
Hand-retractable plungers
Index plungers
Spring stop buttons
Spring locating pins.

Whether you’re building custom fixtures, machinery, or automated systems, Carr Lane Mfg.’s spring-loaded devices are built to streamline operations, enhance productivity, and ensure long-lasting performance.

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Spring Loaded Devices Guide

What Are Spring Loaded Devices?

Spring-loaded devices are precision-engineered alternatives to standard springs used within varying fixtures and manufacturing machines. They are designed to deliver controlled force, accurate positioning, and repeatable performance in manufacturing, machining, and fixturing applications.

More specifically, spring-loaded devices feature a built-in plunger or ball mechanism housed within a threaded framework or body, allowing for easy installation, consistent compression, and reliable operation.

The internal spring provides the force needed to extend or retract the plunger or ball, enabling quick engagement, secure positioning, and smooth movement of components. This makes spring-loaded devices ideal for tasks such as indexing, locking, locating, detenting, or holding parts in place during assembly or machining. In machining, spring-loaded devices are preferred over traditional springs because of their accuracy, repeatability, ease of installation, and minimal spring compression.

Types of Spring-Loaded Devices

Carr Lane Mfg. offers a wide variety of spring-loaded devices, each with specific benefits depending on your unique application. These components are commonly used in jigs, fixtures, machines, and assembly systems to provide secure, repeatable motion control.

Spring plungers are among the most commonly used spring-loaded devices. They feature a narrow nose or plunger tip that applies spring pressure to hold or index a part in place. Ideal for fixture positioning, detenting, or securing sliding parts, spring plungers are available in a variety of thread sizes, lengths, nose styles, and spring forces to suit diverse applications. Their threaded body design allows for quick, secure installation into standard tapped holes.

Ball plungers operate similarly to spring plungers, but instead of a solid nose, they use a hardened ball bearing that rides on the internal spring. The ball allows for smooth engagement and disengagement, making them ideal for light detent and positioning applications where minimal wear and smooth contact with surfaces are important. Ball plungers are commonly used in electronics, automation, and light assembly fixtures.

Hand-retractable plungers feature a manual pull ring or knob that allows the operator to retract the plunger tip without using tools. This makes them ideal for applications requiring frequent repositioning like adjustable fixtures or locking mechanisms. When the handle is released, the spring re-engages the plunger automatically. Carr Lane Mfg. offers versions with locking and non-locking handles to suit different operational needs.

Index plungers provide a positive locking mechanism for positioning and securing parts. They are often used when components must be locked in place and prevented from rotating or shifting until the plunger is disengaged. These plungers typically include a knob or handle for manual retraction and are ideal for rotary tables, sliding guides, and adjustable arms. Many index plungers feature locking notches or safety locking functions for added control.

Spring stop buttons are compact devices that act as spring-loaded stops or positioning points within a fixture or machine. They are often used to secure workpieces or tools in place temporarily during a process. Their low-profile design makes them useful in tight or constrained setups, and they provide a reliable alternative to larger plungers where space is limited.

Spring locating pins combine the functions of a locating pin and a spring mechanism, allowing for quick alignment and disengagement. These are ideal in setups where precise part location is needed repeatedly, but easy removal or repositioning is also required. Spring locating pins help reduce setup time and are frequently used in modular fixturing systems, inspection stations, and automated assemblies.

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Spring Plungers

Ball Plungers

Hand-Retractable Plungers

Index Plungers

Spring Stop Buttons

Spring Locating Pins

Products Related to Spring-Loaded Devices

Adjustable-Torque Knobs

Adjustable-Torque Thumb Screws

Torque Screw Jacks

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What Are Spring Loaded Devices?

Spring-Loaded Devices are alternative solutions to standard springs used within varying fixtures and manufacturing machines. More specifically, spring loaded devices consist of a spring surrounded by a threaded framework or body which also includes a plunger. This plunger or in some cases ball, helps ensure accuracy, repeatability & efficiency. There are several types of spring-loaded devices all which have specific benefits depending on the unique application. In machining, Spring-loaded devices are preferred over traditional springs because of their accuracy, repeatability, ease of installation and minimal spring compression.

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CARR LANE MANUFACTURING
4200 CARR LANE CT.
P.O. BOX 191970
ST. LOUIS, MO 63119
Phone: 314.647.6200
Fax: 314.647.5736

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