Mini Indexing Plunger, also known as a micro positioning pin, is a compact mechanical component used for precise positioning and locking. It is commonly found in lightweight applications requiring frequent repositioning.
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Body: Primarily constructed from galvanized steel or stainless steel with rust-resistant surface treatment. Features a short thread length (typically compatible with M5-M8 thread specifications) to fit mounting holes in compact devices, minimizing space requirements.
Plunger Pin: Mainstream models utilize stainless steel with common diameters ranging from 3mm to 6mm. Offers high hardness and exceptional wear resistance, ensuring positioning accuracy remains consistent over extended use.
Spring: Incorporates a stainless steel compression spring that provides stable return force. This ensures the plunger pin automatically resets and locks without external force, eliminating the need for additional securing steps.

Mini Indexing Plunger employs a “spring-driven + manually controlled” mechanical principle for positioning and unlocking. Models with locking functionality feature a more refined process, divided into two distinct modes:

Workflow:
Initial State: The spring pushes the pin outward, inserting it into the corresponding positioning hole/slot of the device to secure the component.
Unlocking and Adjustment: Manually pull the knob to compress the spring, retracting the pin into the body. The secured component can now freely move to the target position.
Relock: Release the knob. The spring rebounds, pushing the pin to extend again and engage with the positioning hole/slot at the new location, completing the positioning.