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FUJI SEIKI_FK-M4-M16

M4–M16 Fixed Hydraulic Shock Absorbers

  • FUJI LATEX FK M4–M16 fixed hydraulic shock absorbers cover M4–M16 threads and 4–17 mm strokes.
  • Models support low-, medium-, and high-speed impacts, with up to 14.7 J absorption energy and 110 kg equivalent mass for compact automation and industrial machinery.
  • Brand FUJI SEIKI
Features
  • Fixed cushioning design: The FK M4–M16 Series uses fixed hydraulic cushioning characteristics, allowing models to be selected according to machine load and impact speed without damping adjustment.
  • Multiple speed options: FK-1008 through FK-1612 are available in low-, medium-, and high-speed specifications for different machine operating conditions.
  • Wide compact size range: Thread sizes range from M4×0.5 to M16×1.5 with strokes from 4 to 17 mm for compact machinery and limited mounting spaces.
  • Impact absorption capacity: Maximum absorption energy reaches 14.7 J and maximum equivalent mass reaches 110 kg for compact automation, slides, fixtures, and cylinder-end applications.
  • Multiple end configurations: Capless and capped versions are available, while urethane cap versions are offered for FK-1008 through FK-1612. FK-0404 and FK-0604 do not support the urethane cap specification.
Specification
ItemFK M4–M16 Series
Product typeFixed hydraulic shock absorber
Series modelsFK-0404L, FK-0404H
FK-0604L, FK-0604B, FK-0604H
FK-1008L, FK-1008M, FK-1008H
FK-1210L, FK-1210M, FK-1210H
FK-1412L, FK-1412M, FK-1412H
FK-1417L, FK-1417M, FK-1417H
FK-1612L, FK-1612M, FK-1612H
Model characteristicsCompact fixed type; low-, medium-, and high-speed models
Thread sizeM4×0.5, M6×0.75, M10×1, M12×1, M14×1.5, M16×1.5
Stroke4 mm, 8 mm, 10 mm, 12 mm, 17 mm
Max. absorption energy14.7 J
Max. absorption energy per minute235 J/min
Impact speed range0.3~3 m/s, depending on model
Max. equivalent mass110 kg
Max. cycle rate60 cycles/min
FK-0404 / FK-0604: 45 cycles/min
Operating temperature range-5 ~ 70 ℃
Max. drag2,940 N
Piston rod return forceDepending on model, 2.5 ~ 9.8 N or lower
Orifice typeFK-0404 / FK-0604: groove-orifice type
FK-1008 to FK-1612: fixed specially-designed orifice type
Damping typeFixed
End types-S: capless
-C: with cap
-R: with urethane cap, available for FK-1008 to FK-1612
Urethane capFK-0404 / FK-0604: not available
FK-1008 to FK-1612: available
Product massApprox. 2.4 ~ 82 g depending on model and end type
Allowable eccentric angleWithin ±2.5°

Specification notes

  • The FK M4–M16 Series uses fixed hydraulic cushioning. FK-0404 and FK-0604 use a groove-orifice structure, while FK-1008 through FK-1612 provide low-, medium-, and high-speed specifications with impact speeds reaching 3 m/s depending on model.
  • The series covers M4×0.5 to M16×1.5 threads and 4–17 mm strokes, with maximum absorption energy of 14.7 J and maximum equivalent mass of 110 kg. FK-0404 and FK-0604 have a maximum cycle rate of 45 cycles/min, while the larger models reach 60 cycles/min.
  • Sufficient mounting strength and proper alignment are required. Model selection should confirm absorption energy, equivalent mass, impact speed, cycle rate, stroke, thread size, and the appropriate end configuration for the machine.
FAQ

Q1: What is the FUJI LATEX FK M4–M16 Series?
A: The FK M4–M16 Series consists of fixed hydraulic shock absorbers for industrial machinery, compact automation, and precision mechanisms.


Q2: What sizes are included in the FK M4–M16 Series?
A: The series includes FK-0404, FK-0604, FK-1008, FK-1210, FK-1412, FK-1417, and FK-1612, covering thread sizes from M4×0.5 to M16×1.5.


Q3: Is the FK Series fixed or adjustable?
A: The FK M4–M16 Series uses fixed damping characteristics and does not require a damping adjustment knob.


Q4: What do L, M, and H mean in FK model numbers?
A: For FK-1008 through FK-1612, L indicates low-speed, M indicates medium-speed, and H indicates high-speed applications. FK-0404 and FK-0604 use compact groove-orifice configurations with a different model lineup.


Q5: What is the maximum absorption energy?
A: Maximum absorption energy reaches 14.7 J within the FK M4–M16 group.


Q6: What is the maximum equivalent mass?
A: Maximum equivalent mass reaches 110 kg depending on model and impact speed.


Q7: What impact speeds can the FK M4–M16 Series handle?
A: Depending on the model, the overall series covers impact speeds from 0.3 to 3 m/s.


Q8: What end configurations are available?
A: The series offers -S capless and -C with cap configurations. Urethane cap -R versions are available for FK-1008 through FK-1612 but not for FK-0404 or FK-0604.


Q9: What applications are suitable for the FK M4–M16 Series?
A: Typical applications include precision equipment, compact automation, slides, fixtures, transfer mechanisms, pneumatic cylinder ends, and other industrial end-stop mechanisms.


Q10: How do I select the correct FK model?
A: Check moving mass, impact speed, absorption energy, cycle rate, stroke, thread size, and end configuration, or contact GATO Corporation for model selection support.

File Downloads
File Name
File Type
Download
M4–M16 Fixed Hydraulic Shock Absorbers FK-M4-M16 Series_E
PDF
M4–M16 Fixed Hydraulic Shock Absorbers FK-0604 Series_E
PDF
FK-0404
ZIP
FK-0604
ZIP
FK-1008
ZIP
FK-1210
ZIP
FK-1412
ZIP
FK-1417
ZIP
FK-1612
ZIP
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