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ZUNAH
ZHENGCHEN
ZUNAH
Large-headed Stoppers. Best for receiving work pieces on large surfaces.
Head color
| UNAH | Urethane (Black) | Shore A90 | 4137 Alloy Steel | 10.9 | Trivalent Chromate | SS400 | Trivalent Chromate |
| UNAHH | Urethane (Blue) | Shore A70 | 10.9 | Trivalent Chromate | |||
| SLUNA | Low Repulsion Urethane (Gray) | Shore A70 | 304 Stainless Steel | - | - | 304 Stainless Steel | - |
| Type | Stopper | Screw | [ A ]Accessories (Hex Nut) | ||||
| [ M ]Material | [ H ]Hardness | [ M ]Material | *Strength Class | [ S ]Surface Treatment | [ M ]Material | [ S ]Surface Treatment | |
| ZUNAH | Urethane (Black) | Shore A90 | 4137 Alloy Steel | 10.9 | Trivalent Chromate | 1018 Carbon Steel | Trivalent Chromate |
| ZUNAHH | Urethane (Blue) | Shore A70 | 10.9 | Trivalent Chromate | |||
| ZSLUNA | Low Repulsion Urethane (Gray) | Shore A70 | 304 Stainless Steel | - | - | 304 Stainless Steel | - |
| Part Number | - | L |
| ZUNAH4 | - | 20 |
| Part Number | L | t | D | A | d | B | H | ℓ | m | ||||||||||||||||||
| Type | M (Coarse) | UNAH, SLUNA | UNAHH | ||||||||||||||||||||||||
ZUNAH ZUNAHH | 3 | 10 | 15 | 10 | 15 | 3 | 7.5 | 5.5 | 3.3 | 2.5 | 6 | Full Thread | 1.8 | ||||||||||||||
| 4 | 10 | 15 | 20 | (*25) | (*30) | 10 | 15 | 20 | *25 | *30 | 10 | 7 | 4.2 | 3 | 7 | 22 | 2.4 | ||||||||||
| 5 | 10 | 15 | 20 | 25 | *30 | (*40) | 15 | 20 | 25 | *30 | *40 | 4 | 12.5 | 8.5 | 5.5 | 4 | 9 | 24 | 3.2 | ||||||||
| 6 | 10 | 15 | 20 | 25 | 30 | *40 | (*50) | 15 | 20 | 25 | 30 | *40 | *50 | 15 | 10 | 6 | 5 | 10 | 26 | 3.6 | |||||||
| 8 | 10 | 15 | 20 | 25 | 30 | *40 | *50 | (*60) | 25 | 30 | *40 | *50 | *60 | 5 | 20 | 13 | 7.3 | 6 | 13 | 30 | 5 | ||||||
| 10 | 10 | 15 | 20 | 25 | 30 | 40 | *50 | (*60) | (*70) | 30 | 40 | *50 | *60 | *70 | 25 | 16 | 10 | 8 | 15 | 34 | 6 | ||||||
| 12 | 15 | 20 | 25 | 30 | 40 | 6 | 30 | 18 | 13 | 10 | 18 | Full Thread | 7 | ||||||||||||||
| 16 | 20 | 25 | 30 | 40 | 40 | 24 | 17 | 14 | 22 | Full Thread | 10 | ||||||||||||||||
Frequently asked questions about this product (FAQ)
1. Did it fall off without a few collisions? Is it a quality issue?
The stopper is sintered on the bolt and can absorb the impact force from the front, but when the force point is too inclined towards the side, it is relatively easier to fall off.
2. Will there be any small burrs on the surface after arrival that will affect the use?
It does not affect use. This product is formed by one-time injection molding, and there may be small burrs after molding, but it does not affect use. If there are special requirements for appearance, you can request special production from Mismi customer service.
3. What is the service life of polyurethane gaskets compared to rubber materials?
Generally speaking, polyurethane is more excellent in terms of wear resistance and mechanical strength, with a longer service life. However, polyurethane is more sensitive to changes in the usage environment, especially its hydrolysis characteristics, which can shorten its service life.
4. How can polyurethane and resin heads be used differently? What is low rebound polyurethane?
Polyurethane belongs to the category of elastomers and has better cushioning performance than resin. The material of resin is hard and has much higher mechanical strength compared to polyurethane, which can withstand greater impact forces.
The material of low rebound rubber is very special, which can reduce the thermal energy generated by the workpiece after impact
In precision fixture design and machining setups, managing lateral forces without compromising workpiece positioning is a daily reality on the shop floor. Relying on standard detent components for lateral workholding often leads to pin binding, premature wear, and workpiece deflection.
Mold assembly precision directly dictates manufacturing throughput. Minor component failures cause catastrophic tool damage, unacceptable scrap rates, and severe production bottlenecks. Engineers face constant challenges on the floor.
Quick positioning, alignment, indexing, and securing components in sheet metal or thin-walled enclosures presents a strict mechanical limitation. You face insufficient material thickness to support standard threaded hardware.
Specifying the wrong spring plunger often results in micro-misalignments, premature component wear, or catastrophic part ejection failures during high-speed machining and automation cycles.
In precision engineering, the reliability of positioning, indexing, and holding mechanisms depends entirely on the point of contact between the plunger and the workpiece.
Component failure in indexing, positioning, or ejecting mechanisms frequently traces back to a single engineering oversight: specifying the wrong material for the operating environment.
The relentless demand for miniaturization in medical devices, aerospace components, and consumer electronics requires mechanical hardware that fits microscopic footprints without sacrificing tactile feedback, holding force, or the ability to facilitate easy positioning and removal of parts.
Precise component positioning in mechanical assemblies dictates the difference between seamless indexing and mechanical binding. A fraction of a millimeter in plunger travel matters. Engineers must control this movement to ensure reliable machine operation.
Standard plungers fail on angles. Learn to specify spring plungers for sloped surfaces to manage side loads, prevent binding & ensure precision.
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Prevent sensor drift and damage. Learn how optimizing micro spring plunger contact force and tolerance guarantees precision mechanical stability.
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Struggling with indexing or ejection failures? Discover how long-stroke spring plungers bridge extended gaps to eliminate costly downtime.
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Prevent contamination and costly recalls in food processing. Discover how to specify 316L hygienic spring plungers for strict CIP compliance.
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Specify reliable spring plungers for medical devices. Master sterilization-safe materials, micro-sizing, and custom forces for compliant assemblies.
