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Spring Plungers（Wrench Hole Shape：Negative）
A spring plunger is a mechanical device consisting of a pin or plunger enclosed within a housing, with a spring providing force to extend or retract the plunger. When not acted upon, the spring pushes the plunger outward from the housing. Applying external force compresses the spring, allowing the plunger to retract. Once the force is removed, the spring pushes the plunger back out. Some spring plungers have locking mechanisms for added stability. They are widely used in manufacturing for precise positioning, retaining objects in place, aligning components, and providing adjustable force. They can also serve as safety devices by giving feedback or triggering switches. In essence, spring plungers offer a simple yet effective solution for controlling motion and force in various applications. To select a Misumi spring plunger, consult the product specifications for factors such as size, material, spring force, and any additional features required for your specific application needs. Then, use MISUMI's online catalog or contact direct our MISUMI for assistance.
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NABEYA BI-TECH
Light-load and heavy-load types available in steel and stainless steel.
Outer Dia. M(mm) Stroke S(mm) Tip Material Body Material Mounting Method Initial Load (Range)(N) Lock Tip Heat Treatment Screw Type of Pin Plunger Wrench Hole Shape Main Body Surface Treatment Tip Surface Treatment 4 ～ 24 1.5 ～ 8 Steel / Stainless Steel Steel / Stainless Steel Screw-In 0.01~50 / 50.01~100 Not Provided Not Provided / Hardening Spherical Negative Not Provided / Black Oxide Black Oxide / Trivalent Chromate / Nitriding Treatment From: ₹ 288.35 Days to Ship: 5 Day(s) or more 
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KONISHI
A spring is built in the screw, and the spring force causes the ball to move in and out. It can be used for indexing, positioning, and extrusion of jigs. Since the thread diameters range from M4 to M24, please select the required size.
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- 2D
Outer Dia. M(mm) Stroke S(mm) Tip Material Body Material Mounting Method Initial Load (Range)(N) Lock Tip Heat Treatment Screw Type of Pin Plunger Wrench Hole Shape Main Body Surface Treatment Tip Surface Treatment 4 ～ 24 1.5 ～ 8 Steel Steel Screw-In 0.01~50 / 50.01~100 Not Provided Not Provided Spherical / Short Stroke Negative Black Oxide Black Oxide From: ₹ 290.87 Days to Ship: 5 Day(s) or more
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NABEYA
[Features]This is a plunger suitable for positioning, fixing, pressing and releasing.
- CAD ：
- 2D
Outer Dia. M(mm) Stroke S(mm) Tip Material Body Material Mounting Method Initial Load (Range)(N) Lock Tip Heat Treatment Screw Type of Pin Plunger Wrench Hole Shape Main Body Surface Treatment Tip Surface Treatment 4 ～ 12 1.5 ～ 3.5 Steel / Stainless Steel Steel / Stainless Steel Screw-In 0.01~50 Not Provided Not Provided / Carburized Spherical Negative Not Provided / Black Oxide / Trivalent Chromate Not Provided / Black Oxide / Electroless Nickel Plating From: ₹ 273.62 Days to Ship: 5 Day(s) or more
5 Day(s) or more
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| Tip Surface Treatment |
You can add up to 6 items per a category to the compare list.  | You can add up to 6 items per a category to the compare list.  | You can add up to 6 items per a category to the compare list.  | |
| Brand | NABEYA BI-TECH | KONISHI | NABEYA |
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| From | ₹ 288.35 | ₹ 290.87 | ₹ 273.62 |
| Days to Ship | 5 Day(s) or more | 5 Day(s) or more | 5 Day(s) or more |
| Outer Dia. M(mm) | 4 ～ 24 | 4 ～ 24 | 4 ～ 12 |
| Stroke S(mm) | 1.5 ～ 8 | 1.5 ～ 8 | 1.5 ～ 3.5 |
| Tip Material | Steel / Stainless Steel | Steel | Steel / Stainless Steel |
| Body Material | Steel / Stainless Steel | Steel | Steel / Stainless Steel |
| Mounting Method | Screw-In | Screw-In | Screw-In |
| Initial Load (Range)(N) | 0.01~50 / 50.01~100 | 0.01~50 / 50.01~100 | 0.01~50 |
| Lock | Not Provided | Not Provided | Not Provided |
| Tip Heat Treatment | Not Provided / Hardening | Not Provided | Not Provided / Carburized |
| Screw Type of Pin Plunger | Spherical | Spherical / Short Stroke | Spherical |
| Wrench Hole Shape | Negative | Negative | Negative |
| Main Body Surface Treatment | Not Provided / Black Oxide | Black Oxide | Not Provided / Black Oxide / Trivalent Chromate |
| Tip Surface Treatment | Black Oxide / Trivalent Chromate / Nitriding Treatment | Black Oxide | Not Provided / Black Oxide / Electroless Nickel Plating |
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Outer Dia. M(mm)
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Initial Load (Range)(N)
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Lock
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Tip Heat Treatment
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Screw Type of Pin Plunger
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Wrench Hole Shape
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Main Body Surface Treatment
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Tip Surface Treatment
Related Categories to Spring Plungers
FAQ Spring Plungers
- Question: How do spring plungers contribute to the efficiency of injection molding processes?
- Answer: Spring plungers boost injection molding efficiency by securely holding mold components, ensuring precise alignment for consistent results. During setup, they allow quick and effortless adjustment, reducing downtime. Their spring-loaded design maintains component position while enabling easy repositioning, simplifying the process. By streamlining setup and operation, spring plungers enhance productivity in injection molding, benefiting manufacturers by saving time and improving overall efficiency.
- Question: What are spring plungers used for?
- Answer: Spring plungers have a wide range of applications, especially in manufacturing. Here are some common uses:
Positioning and alignment: Spring plungers can be used to precisely position and align components during assembly.
Retention: They can hold objects in place, like detents in latches or catches in housings.
Ejection: Spring plungers can eject parts from molds or fixtures.
Applying pressure: They can apply a controlled amount of force for tasks like clamping or activating switches. - Question: What is the importance of ball plungers in automation?
- Answer: Ball plungers are important in automation because they help things get in the right spot and stay there. Even though they're small, they're super good at making sure parts are in the exact place they need to be. They're used in tools and fixtures to keep stuff secure and move it exactly where it needs to go on the assembly line. Ball plungers are great because they make sure everything runs smoothly and works well, making factories more efficient and products better.
- Question: What materials are spring plungers typically made of?
- Answer: Spring plungers are commonly made of materials such as stainless steel, carbon steel, brass, and plastic. The choice of material depends on factors like the application requirements, environmental conditions, and desired durability.
- Question: What role do locating, positioning, jigs & fixtures play in plunger technology?
- Answer: Locating, positioning, jigs, and fixtures are super important in plunger technology. Locating mechanisms make sure plungers and workpieces are in the right spot for machining or assembly, reducing mistakes. Positioning devices control how plungers move, so they go exactly where they're supposed to. Jigs and fixtures hold everything in place securely during machining or assembly, which helps prevent errors and makes things work faster and better. Overall, these parts work together to make plunger technology work smoothly and produce high-quality results.
- Question: What are the characteristics of spring plungers with flat tip?
- Answer: Spring plungers with flat tips are versatile tools designed for precise positioning and secure holding of components. Their flat tip ensures even pressure distribution, minimizing the risk of damage to surfaces. These plungers provide strong retention force, securely holding components in place. Some models allow for adjusting the spring tension to customize the holding force. Made from durable materials like steel or stainless steel, they offer longevity and resistance to wear. They are easy to install and replace, making setup and maintenance hassle-free.
- Question: What are the key considerations when selecting materials for plungers?
- Answer: When selecting materials for plungers, consider their strength, durability, and corrosion resistance. Ensure they can withstand operational forces without wearing out quickly. Check if they're resistant to rust and can handle the temperatures they'll encounter. Also, factor in the cost and ease of manufacturing. By evaluating these factors, you can choose materials that meet the needs of your application, providing long-lasting performance without breaking the bank. Ultimately, selecting the right materials ensures reliable and efficient operation of plungers in various industrial settings.
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