M42 Fixed Hydraulic Shock Absorbers
| Item | FK M42 Series |
|---|---|
| Product type | Fixed hydraulic shock absorber |
| Series models | FK-4225BL-C, FK-4225BM-C, FK-4225BH-C FK-4250BL-C, FK-4250BM-C, FK-4250BH-C FK-4275BL-C, FK-4275BM-C, FK-4275BH-C |
| Model characteristics | Multiple-orifice type, fixed type, low-speed, medium-speed, and high-speed models |
| Thread size | M42×1.5 |
| Stroke | 25 mm, 50 mm, 75 mm |
| Max. absorption energy | 780 J |
| Max. absorption energy per minute | 3,345 J/min |
| Impact speed range | 0.1～3.6 m/s, depending on model |
| Max. equivalent mass | 30,000 kg |
| Max. cycle rate | 20 cycles/min, depending on model and stroke |
| Operating temperature range | -5 ~ 70 ℃ |
| Max. drag | 31,590 N |
| Piston rod return force | 120 N or lower |
| Orifice type | Multiple-orifice type |
| Damping type | Fixed |
| End types | -C: with cap |
| Urethane cap | Optional OP-090M42A |
| Product mass | FK-4225B: 795 g FK-4250B: 1,020 g FK-4275B: 1,240 g |
| Allowable eccentric angle | Within ±2.5° |
Specification notes
Q1: What is the FUJI LATEX FK M42 Series?
A: The FK M42 Series consists of fixed hydraulic shock absorbers for industrial machinery, automation systems, transfer mechanisms, and large end-stop applications.
Q2: What models are included in the FK M42 Series?
A: The series includes FK-4225BL/BM/BH-C, FK-4250BL/BM/BH-C, and FK-4275BL/BM/BH-C, for a total of nine models.
Q3: Is the FK M42 Series fixed or adjustable?
A: All FK M42 models on this page are fixed hydraulic shock absorbers and do not require damping adjustment.
Q4: What is the difference between BL, BM, and BH models?
A: BL models are rated for 0.1–0.5 m/s, BM models for 0.3–1.5 m/s, and BH models for 0.3–3.6 m/s impact speeds.
Q5: What is the difference between FK-4225B, FK-4250B, and FK-4275B?
A: The main differences are stroke and absorption energy. FK-4225B provides 25 mm and 260 J, FK-4250B provides 50 mm and 520 J, and FK-4275B provides 75 mm and 780 J.
Q6: What is the maximum equivalent mass of the FK M42 Series?
A: Maximum equivalent mass reaches 30,000 kg with FK-4275BL-C. The applicable equivalent mass varies according to stroke and impact-speed model.
Q7: What is the maximum cycle rate?
A: Maximum cycle rate depends on the model and stroke, reaching up to 20 cycles/min within the FK M42 Series.
Q8: Is a urethane cap available for the FK M42 Series?
A: Yes. The standard models use a metallic cap, and the OP-090M42A urethane cap is available as an option.
Q9: Is an external stopper required?
A: Yes. The current product instructions require sufficient mounting strength and an external stopper, while eccentric loading should remain within the allowable limit.
Q10: How do I select the correct FK M42 model?
A: Check moving mass, impact speed, absorption energy, cycle rate, required stroke, mounting space, and operating conditions, or contact GATO Corporation for model selection support.