FUJI LATEX FES-4275 High-Capacity Single-Use Emergency Stoppers

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FUJI LATEX FES-4275 high-capacity single-use emergency stopper
FUJI LATEX FES-4275 high-capacity single-use emergency stopper
FUJI SEIKI_FES-4275

High-Capacity Single-Use Emergency Stoppers

  • FUJI LATEX FES-4275 high-capacity single-use emergency stoppers feature an M42×1.5 integral design for large machinery.
  • Both models provide a 75 mm maximum stroke and impact speeds up to 5 m/s, with absorption capacities of 5,000 or 10,000 J.
  • Brand FUJI SEIKI
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Features
  • High-capacity emergency stopping: The FES-4275 Series is designed for high-energy emergency-stop applications. FES-4275-1 provides 5,000 J maximum absorption energy, while FES-4275-2 increases capacity to 10,000 J.
  • M42 integral construction: Both models use an M42×1.5 mounting size and are classified as the integral M42 type, distinguishing them from the M6–M30 press-fit-tube FES models.
  • 75 mm maximum stroke: FES-4275-1 and FES-4275-2 both provide a 75 mm maximum stroke for absorbing high emergency-stop energy in large industrial machinery.
  • Impact speeds up to 5 m/s: Both models support impact speeds up to 5 m/s and operate within a temperature range of -25 to 60 ℃.
  • Single-use metal deformation cushioning: Impact energy is absorbed through plastic deformation of metal rather than conventional hydraulic damping. Each unit must be replaced after emergency activation.
Specification
ItemFES-4275 Series
Product typeHigh-capacity single-use emergency stopper
Series modelsFES-4275-1
FES-4275-2
Model characteristicsHigh-capacity emergency-stop, single-use, fixed type, integral construction
Thread sizeM42×1.5
Stroke75 mm
Max. absorption energyFES-4275-1: 5,000 J
FES-4275-2: 10,000 J
Impact speed rangeUp to 5 m/s
Operating temperature range-25～60 ℃
Max. dragFES-4275-1: 200,000 N
FES-4275-2: 320,000 N
Cushioning principlePlastic deformation of metal
Damping typeFixed
Eccentric loadingNot permitted

Specification notes

  • The FES-4275 Series uses an M42×1.5 integral construction for high-load applications. The unit must be tightened using the wrench flats on the main body, with a specified mounting tightening torque of 265 N·m. Other sections of the product should not be used for tightening, and sufficient mounting strength must be provided while preventing eccentric loading.
  • An external mechanical stopper is required during operation. The mounting structure must also provide sufficient strength for the applicable emergency-stop load.
  • The FES-4275 Series absorbs emergency impact through plastic deformation of metal and is intended for single use only. Once activated, the unit must be replaced with a new one and cannot be reused or restored by disassembly and reassembly.
FAQ

Q1: What is the FUJI LATEX FES-4275 Series?
A: The FES-4275 Series consists of high-capacity single-use emergency stoppers designed to absorb impact during runaway, overtravel, or abnormal movement in large industrial machinery.


Q2: What models are included in the FES-4275 Series?
A: The series includes FES-4275-1 and FES-4275-2. Both models use an M42×1.5 mounting size and provide a 75 mm stroke.


Q3: What is the difference between FES-4275-1 and FES-4275-2?
A: FES-4275-1 provides 5,000 J of maximum absorption energy and 200,000 N of maximum drag, while FES-4275-2 provides 10,000 J and 320,000 N.


Q4: Can the FES-4275 Series be reused?
A: No. The FES-4275 Series absorbs emergency impact through permanent metal deformation and must be replaced after one activation.


Q5: What is the stroke of the FES-4275 Series?
A: Both FES-4275-1 and FES-4275-2 provide a 75 mm stroke.


Q6: What impact speed does the FES-4275 Series support?
A: Both models support impact speeds up to 5 m/s and operate within a temperature range of -25 to 60 ℃.


Q7: How does FES-4275 differ from the standard FES Series?
A: Standard FES M6–M30 models use a press-fit-tube construction, while the FES-4275 Series uses an M42 integral construction and provides substantially higher absorption capacities of 5,000 to 10,000 J.


Q8: How should the FES-4275 Series be tightened during installation?
A: Tighten the unit using the wrench flats on the main body. The specified mounting tightening torque for FES-4275-1 and FES-4275-2 is 265 N·m, and other portions of the product should not be used for tightening.


Q9: Is an external stopper required for the FES-4275 Series?
A: Yes. The products must not be operated without an external stopper and sufficient mounting strength.


Q10: How do I choose between FES-4275-1 and FES-4275-2?
A: Calculate the kinetic energy and thrust during the emergency condition, then confirm the required stopping stroke and allowable maximum drag. FES-4275-1 provides up to 5,000 J, while FES-4275-2 extends the maximum absorption capacity to 10,000 J.

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