GN822 Mini Indexing Plunger
PDM
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The structural design of this component focuses heavily on space optimization, utilizing a hidden locking mechanism that maintains a minimal external footprint. This compact architecture is specifically engineered for precision positioning within thin-walled sheet metal fabrications and highly restricted assembly spaces where traditional, bulkier fasteners cannot fit. By keeping the mechanical profile low, engineers can design tighter enclosures without sacrificing accessibility or holding strength. The smooth, tactile engagement of the internal spring provides immediate physical feedback to the operator, confirming that the pin has securely seated into its designated position.
Mini Indexing Plunger GN822 stainless indexing plunger for Gym
GN822 is a mini indexing plunger that achieves precise positioning and locking through a spring-loaded mechanism. When an operator pulls the matte black polyamide knob, the internal stainless steel pin retracts with a firm, distinct mechanical click, allowing for rapid adjustments across various equipment tracks or pivot points. The carefully calibrated spring tension ensures that once released, the pin drives forward with consistent force, eliminating unwanted lateral play or vibration-induced shifting during active machinery operation. This dependable physical engagement is crucial for maintaining alignment in repetitive mechanical processes.
Standard Model GN822:
Thread Size: M8×0.75, M10×1 or Customized
Plunger Rod Diameter: 4mm, 5mm, 6mm, 8mm, 10mm or Customized
Total Length: 26.5mm, 34mm or Customized
Spring Material: Stainless Steel, Spring Steel
Spring Pressure: Preload [N]: 4.5N-5N, Max.load[N]: 12N-18N
Threaded Body: Zinc plated steel (ST) / AISI 303 Stainless Steel (NI)
Plunger: AISI 303 Stainless Steel
Knob: Polymide based (PA) technopolymer, black matte finish
Standard Executions
Execution B: Without rest position
Execution C: With rest position - Pull the knob and turn it by 30°
The operation mechanism and assembly convenience of Execution C are particularly noteworthy. The Type C design features a built-in locking rest position; by simply pulling the knob and rotating it 30 degrees, the plunger remains retracted without continuous manual holding. Furthermore, when the pin is fully retracted, the wrench flats on the threaded body are completely exposed. This thoughtful clearance allows technicians to use a standard open-end wrench for rapid, secure tightening during initial installation or routine maintenance, significantly reducing assembly downtime.
Variant Model GN822.8:
Body with mounting plate: Zinc die-cast Powder coated Black, textured finish
Plunger pin: Stainless steel AISI 303
Spring: Stainless steel AlSl 301
Knob Plastic: Technopolymer (Polyamide PA)
Temperature resistant up to 230 °F (110°C) Black, matte finish
Not removable
Description | d1 | d2 | d3 | d4 | I1 | I2 | I3 | I4 | SW | Preload (N) | Max.Load(N) |
GN822-4-B-NI | 4 | M8*0.75 | 21 | 15 | 26.5 | 5 | 5 | 3.5 | 10 | 4.5 | 12 |
GN822-5-B-NI | 5 | M8*0.75 | 21 | 15 | 26.5 | 5 | 5 | 3.5 | 10 | 4.5 | 12 |
GN822-6-B-NI | 6 | M10*1 | 25 | 18 | 34 | 7 | 7 | 4.5 | 12 | 5 | 18 |
GN822-7-B-NI | 7 | M10*1 | 25 | 18 | 34 | 7 | 7 | 4.5 | 13 | 5 | 18 |
GN822-4-C-NI | 4 | M8*0.75 | 21 | 15 | 26.5 | 5 | 5 | 3.5 | 10 | 4.5 | 12 |
GN822-5-C-NI | 5 | M8*0.75 | 21 | 15 | 26.5 | 5 | 5 | 3.5 | 10 | 4.5 | 12 |
GN822-6-C-NI | 6 | M10*1 | 25 | 18 | 34 | 7 | 7 | 4.5 | 12 | 5 | 18 |
GN822-7-C-NI | 7 | M10*1 | 25 | 18 | 34 | 7 | 7 | 4.5 | 13 | 5 | 18 |
High positioning accuracy is the primary objective of this mechanism, making it highly suitable for high-precision scenarios where exact repeatability is non-negotiable. The elastic crimping structure effectively reduces displacement risk under dynamic loads, ensuring that components remain exactly where they are set. This inherent stability translates to excellent automation adaptability, allowing integrators to rely on consistent mechanical behavior across thousands of cycles.
Customized requirement design: We understand that standard dimensions do not always fit specialized machinery. Therefore, we offer adjustable rod lengths, varied spring force calibrations, specialized surface coatings for extreme environments, and full support for manufacturing non-standard thread specifications. To further support engineering R&D and technical implementation, we provide comprehensive 3D CAD model downloads, detailed spring load rating data, and complete technical specification sheets. This allows mechanical designers to seamlessly integrate the plunger's exact geometry and force profiles into their preliminary equipment drafting and simulation phases.
These indexing plungers serve critical roles across multiple industrial sectors, including mechanical arm positioning, secure screw locking mechanisms, heavy equipment fixation, and modular component insertion. The tactile assurance of the pin locking into place gives operators confidence during rapid changeovers or tooling adjustments.
Thanks to the exceptional material properties of the AISI 303 stainless steel construction, this plunger offers outstanding anti-corrosion performance. This makes it perfectly suited for industry-specific applications with stringent hygiene and environmental demands. It excels in the harsh washdown environments of food processing facilities, the sterile enclosures of pharmaceutical manufacturing equipment, the corrosive atmospheres of chemical processing machinery, and demanding outdoor installations exposed to fluctuating weather conditions.
The primary advantages lie in its inherent corrosion resistance and long service life, which drastically reduce maintenance intervals and replacement costs. The direct press-in installation method simplifies the manufacturing workflow; it actively reduces necessary machining steps on the base material and noticeably improves overall assembly line efficiency. We also support sample delivery design and flexible customization services, ensuring that every batch meets specific operational criteria, backed by comprehensive service technical support.
From a regulatory standpoint, this product strictly complies with RoHS environmental directives. This international compliance ensures that the components meet the rigorous environmental and safety access standards required for exporting machinery to European and American markets, effectively lowering compliance risks for equipment manufacturers. Additionally, to streamline the procurement process, we offer a complete ecosystem of perfectly matched accessories. Buyers can source compatible spacer sleeves (such as the GN 609.5), thin-profile hex nuts, and precision positioning bushings all at once, providing a unified, one-stop system assembly solution.
Proper installation dictates the longevity of the locking mechanism. After thoroughly cleaning the threaded hole to remove any metal shavings or debris, manually screw the plunger in to avoid thread deformation caused by excessive initial torque. Feeling the threads engage smoothly by hand prevents cross-threading. The SS high load type and solid stainless steel material variations are strongly preferred for high vibration scenarios where structural integrity is heavily tested.
01. Manual pre alignment
Carefully insert the plunger vertically into the prepared threaded hole. Rotate it clockwise by hand until the base flange comes into complete, flush contact with the mounting surface. It is critical that this is done without applying any diagonal or lateral force, which could distort the internal spring housing.
02. Torque tightening
Once seated manually, use a properly sized open-end wrench to secure the flange's hexagonal surface. Tighten the unit in measured stages according to the provided torque specifications. Note that versions with a plastic plug head require a reduced tightening force to prevent cracking the polyamide material.
A [Check thread specifications] --> B [Clean base hole] --> C [Manually screw in to flange fit] --> D [Torque wrench graded tightening] --> E [Verticality correction] --> F [Load test]
