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Spring Plungers（Screw Type of Pin Plunger：Short Stroke）
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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Specification/Dimensions
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Outer Dia. M(mm)
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Stroke S(mm)
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Tip Material
- Steel
- Stainless Steel
- Plastic
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Body Material
- Steel
- Stainless Steel
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Mounting Method
- Screw-In
- Press Fit
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Initial Load (Range)(N)
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Lock
- Not Provided
- Provided
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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
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Until 31/03/2025
Until 31/03/2025Short Spring Plungers - Stainless Steel
MISUMI
- Short Spring Plungers - Stainless Steel
- Screw Type of Pin Plunger: Short Spring Plunger Spherical type.
- Body Material: Stainless Steel SUS304 Equivalent.
- Pin Material: Stainless Steel SUS440C and Plastic Polyacetal.
- Pin Hardness (For Stainless Steel type): 55HRC~
- Spring Material: Stainless Steel SUS631J1.
- The operating Temperature: -30~260° C (Stainless Steel tip type)
- The operating Temperature: -30~80° C (Plastic tip type)
- Mounting Thread size: 3, 4, 5, 6, 8, 10, 12 and 16 mm.
- Mounting Method: Screw-In type.
- Wrench Hole Shape: Hex.From: ฿ 211.12 Special Price Days to Ship: 
Same day
Same day
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You can add up to 6 items per a category to the compare list.
Until 31/03/2025
Until 31/03/2025MISUMI
- Short Spring Plungers - Steel
- Screw Type of Pin Plunger: Short Spring Plunger and Spherical head.
- Body Material: SCM435
- Body Hardness: 29 ~ 35HRC
- Main Body Surface Treatment: Black Oxide and Electroless Nickel Plating.
- Pin Material: Steel S45C and Plastic Polyacetal.
- Pin Surface Treatment (for steel type): Black Oxide and Trivalent Chromate.
- Spring Material: SWP-B.
- The operating Temperature: -30 to 80 ℃
- Mounting Thread size: 3, 4, 5, 6, 8, 10, 12 and 16 mm.
- Mounting Method: Screw-InFrom: ฿ 105.56 Special Price Days to Ship:
Same day
Same day
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You can add up to 6 items per a category to the compare list.
Until 31/03/2025
Until 31/03/2025NBK
[Features]
· With nylon welding to prevent loosening (except for M3 and M4).
· PSP-N is equipped with plastic pins.
· Does not scratch the workpiece.
· Use the dedicated plunger wrench (PPW) for pin mounting and removal.
· Use abrasion-resistant ball buttons (BB) on the receiving end.
· The manufacturer also offers custom products made to unique specifications, including dimensions, loads, and materials, etc.From: ฿ 248.71 Special Price Days to Ship:
Same day
Same day
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You can add up to 6 items per a category to the compare list.
NBK
[Features]
- Short stroke plunger made of stainless steel.
- Outstanding durability.
- PSPS-NS or PSPS-NZ pins are made of plastic.
- Does not scratch the workpieces.
- Use the dedicated plunger wrench PPW for mounting or dismounting from the pin side.
- Use the ball button BB with improved abrasion resistance for the receiving side.
- Products with special dimension, load, or material specs can also be produced.From: ฿ 578.00 Days to Ship:
5 Day(s)
5 Day(s)
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You can add up to 6 items per a category to the compare list.
KONISHI
A plunger with a built-in spring in the screw, that permits the ball to enter/exit by the force of the spring.
[Features]
· Thread diameters from M3 to M24 are available.
[Applications]
· Can be used for locating, positioning and pushing out jigs.From: ฿ 239.57 Days to Ship:
Same day
Same day
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You can add up to 6 items per a category to the compare list.
KONISHI
The ball moves in and out by the action of the spring built into the screw. Can be used for indexing, positioning and extrusion of jigs. Select the required size from the range of thread diameters M4 to M24.From: ฿ 140.97 Days to Ship:
3 Day(s)
3 Day(s)
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You can add up to 6 items per a category to the compare list.
Short Stroke Plungers (Heavy Load) SP-H
KONISHI
This is a heavy duty type of short spring plunger. Compatible wrenches for SP-3-H and SP-4-H are not available.From: ฿ 324.15 Days to Ship:
3 Day(s)
3 Day(s)
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You can add up to 6 items per a category to the compare list.
KONISHI
A short-stroke plunger in full stainless steel. Ideally suited to catering machinery and outdoor installations due to its superior anti-rust properties.From: ฿ 601.18 Days to Ship:
4 Day(s)
4 Day(s)
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You can add up to 6 items per a category to the compare list.
KONISHI
All-stainless steel ball short-stroke plungers, ideal for food machinery/outdoor installation due to its superior anti-rust properties.From: ฿ 526.88 Days to Ship:
4 Day(s)
4 Day(s)
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You can add up to 6 items per a category to the compare list.
Short Stroke Plungers (Light Load) SP-S
KONISHI
This is a light duty type of short spring plunger. Compatible wrenches for SP-3-H and SP-4-H are not available.From: ฿ 321.92 Days to Ship:
4 Day(s)
4 Day(s)
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You can add up to 6 items per a category to the compare list.
KONISHI
An integral spring inside the screw forces a pin in and out. Can be used to determine, select the position of, and push out fixtures. Screw diameters from M4 to M16 are available. Simply select the size you require.From: ฿ 260.74 Days to Ship:
4 Day(s)
4 Day(s)
| Brand |
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| Product Series |
| CAD |
| From |
| Days to Ship |
| 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 |
You can add up to 6 items per a category to the compare list.  Until 31/03/2025    | You can add up to 6 items per a category to the compare list.  Until 31/03/2025     | You can add up to 6 items per a category to the compare list.  Until 31/03/2025 | 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.  | 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.  | 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 | MISUMI | MISUMI | NBK | NBK | KONISHI | KONISHI | KONISHI | KONISHI | KONISHI | KONISHI | KONISHI |
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| CAD |
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| From | ฿ 211.12 Special Price On Sale Until 31/03/2025 | ฿ 105.56 Special Price On Sale Until 31/03/2025 | ฿ 248.71 Special Price On Sale Until 31/03/2025 | ฿ 578.00 | ฿ 239.57 | ฿ 140.97 | ฿ 324.15 | ฿ 601.18 | ฿ 526.88 | ฿ 321.92 | ฿ 260.74 |
| Days to Ship | Same day | Same day | Same day | 5 Day(s) | Same day | 3 Day(s) | 3 Day(s) | 4 Day(s) | 4 Day(s) | 4 Day(s) | 4 Day(s) |
| Outer Dia. M(mm) | 3 ～ 16 | 3 ～ 16 | 3 ～ 12 | 4 ～ 12 | 3 ～ 24 | 4 ～ 24 | 3 ～ 12 | 4 ～ 16 | 4 ～ 16 | 5 ～ 12 | 4 ～ 16 |
| Stroke S(mm) | 1 ～ 4.5 | 1 ～ 4.5 | 1.5 ～ 5 | 2 ～ 5 | 1 ～ 10 | 1.5 ～ 8 | 1.5 ～ 5 | 1.5 ～ 5 | 1.5 ～ 5 | 3 ～ 5 | 1.5 ～ 5 |
| Tip Material | Stainless Steel / Plastic | Steel / Plastic | Steel / Plastic | Stainless Steel / Plastic | Steel | Steel | Steel | Plastic | Stainless Steel | Steel | Plastic |
| Body Material | Stainless Steel | Steel | Steel | Stainless Steel | Steel | Steel | Steel | Stainless Steel | Stainless Steel | Steel | Steel |
| Mounting Method | Screw-In | Screw-In | Screw-In | Screw-In | Screw-In | Screw-In | Screw-In | Screw-In | Screw-In | Screw-In | Screw-In |
| Initial Load (Range)(N) | 0.01~50 | 0.01~50 | 0.01~50 | 0.01~50 | 0.01~50 / 50.01~100 | 0.01~50 / 50.01~100 | 0.01~50 | 0.01~50 | 0.01~50 | 0.01~50 | 0.01~50 |
| Lock | Not Provided | Not Provided | Provided | Not Provided | Not Provided | Not Provided | Provided | Not Provided | Not Provided | Provided | Not Provided |
| Tip Heat Treatment | Not Provided / Hardening | Not Provided / Carburized | Not Provided / Hardening | Not Provided / Hardening | Not Provided | Not Provided | Not Provided | Not Provided | Not Provided | Not Provided | Not Provided |
| Screw Type of Pin Plunger | Short Stroke | Short Stroke | Short Stroke | Short Stroke | Short Stroke | Short Stroke | Short Stroke | Short Stroke | Short Stroke | Short Stroke | Short Stroke |
| Wrench Hole Shape | Hex | Hex | Hex | Hex | Hex | Negative | Hex | Hex | Hex | Hex | Hex |
| Main Body Surface Treatment | Not Provided / Electroless Nickel Plating | Black Oxide / Electroless Nickel Plating | Black Oxide / Electroless Nickel Plating | Not Provided | Black Oxide | Black Oxide | Black Oxide | Not Provided | Not Provided | Black Oxide | Black Oxide |
| Tip Surface Treatment | Not Provided | Not Provided / Black Oxide / Trivalent Chromate | Not Provided / Black Oxide / Trivalent Chromate | Not Provided | Black Oxide | Black Oxide | Black Oxide | Not Provided | Nitriding Treatment | Trivalent Chromate | Not Provided |
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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 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: How is stainless steel utilized in plunger design?
- Answer: Stainless steel is often picked for plungers because it's good at resisting rust and staying strong, even when it's used a lot. It's durable and reliable, which means it lasts a long time without getting damaged, even in tough conditions or when exposed to chemicals that could corrode other materials. That's why it's commonly used in plungers for things like machines in factories, cars, and precision tools, where performance and low maintenance are essential.
- 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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