Indexing Plungers for Position Control in Machinery and Modular Assemblies

When mechanical components require repeatable positioning, precise locking, or quick reconfiguration, engineers turn to a compact yet powerful solution: the Indexing Plunger.

Also known as a spring plunger with lockout, this device is widely used in modular systems, automation equipment, tooling jigs, and adjustable machine frames.

At Dongguan Sango Hardware Fasteners Co., Ltd., we manufacture and customize high-performance indexing plungers for industrial clients worldwide.

1. What Is an Indexing Plunger?

An Indexing Plunger is a spring-loaded pin mechanism that can be retracted and then automatically extend into a mating hole or slot to hold parts in a fixed position.

It allows for:

• Accurate position control
• Manual or automated retraction
• Locking at pre-defined intervals
• Easy release and reset by hand or actuator

2. Types of Indexing Plungers

🔹 Pull Knob Indexing Plunger

• Manual pull knob to retract plunger
• Common in jigs, presses, and adjustable arms

🔹 Lock-Out Indexing Plunger

• Can stay in retracted position when rotated
• Ideal for sliding or frequently re-positioned elements

🔹 Threaded Body Indexing Plunger

• Installed via threaded body into tapped holes
• Offers easy integration into equipment frames

🔹 Flanged Indexing Plunger

• Mounts via flange with through-holes
• Provides extra holding force and load capacity

🔹 Miniature Indexing Plunger

• Compact, lightweight design
• Used in electronics, optics, or tight-space applications

3. Key Applications

Indexing plungers are used in systems requiring precise, repeated adjustment:

• 🛠 Height or angle adjustment in machine setups
• 🧰 Workholding jigs and fixture plates
• 🧪 Testing rigs with repeat positioning
• 🚗 Vehicle assembly guides and stops
• 🤖 Robot modular structures and grippers
• 📦 Conveyor stops and mechanical dividers

They allow quick repositioning while maintaining locking security—perfect for operator-controlled environments.

4. Material & Specification Options