Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-50S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-50S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø25mm bore and 250mm stroke, 1/8" air ports and a SUS304 stainless-steel barrel for mildly corrosive environments. For the same bore and stroke it is shorter than an ISO 6432 cylinder, saving mounting space.
- BoreØ25 mm
- Stroke250 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM10×1.25
- CushionVariable air cushion, both ends
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-50S
Dial in exact extend positions on-site with the AirTAC MFCJ25X250-50S, a JIS-standard round-body mini cylinder featuring a 50mm adjustable stroke window (usable extend 200-250mm) and needle-set variable air cushions at both ends. The riveted SUS304 stainless barrel and aluminium covers yield a body shorter than an ISO 6432 unit for the same 25mm bore and 250mm stroke, resisting mild washdown while saving mounting length.
Driven by filtered air at 1/8" ports, this double-acting actuator delivers 245.3N push and 206.1N pull at 0.5MPa. The integrated piston magnet (-S) supports CMSG, DMSG, or EMSG switches for position sensing. Factoring a 60% safety margin, it handles a safe working load of about 147N, lifting roughly 12.5kg vertically.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-50S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-50S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 250 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Variable air cushion, both ends |
| Max standard stroke | Up to 500 mm |
Specifications follow the official AirTAC MF/MFC (JIS-standard) datasheet. Barrel: SUS304 stainless steel; covers: aluminum alloy (round-body, riveted rolling-packed construction). Thread options: PT (blank) / G / NPT.
Theoretical Output Force (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-50S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
MF-family variants: MF / MFC (double acting ±cushion), MSF / MTF (single acting push / pull), MFD / MFCD (double rod ±cushion), MFJ / MFCJ (adjustable stroke ±cushion). Back covers CA / U / CM. Mounting LB / FA / SDB / TC.
Where the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-50S Is Used
Adjustable Tooling Stops
Fine-tune the extend end by up to 50mm during machine changeovers, using the variable air cushion to soften high-speed impacts on 12.5kg tooling heads.
Dynamic Diverter Arms
Set precise diverting distances on the fly for mixed product lines; the 245.3N push force easily handles light package routing without harsh end-of-stroke slamming.
Vertical Lift Gates
Lift access gates up to 200-250mm while tuning the close position; pair with a pilot check valve to hold the load, as the cushion only decelerates.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-50S the Right Cylinder?
Selecting between bores means matching force to mass: the MFCJ20 yields just 157N push at 0.5MPa, while the MFCJ32 jumps to 402.2N. This 25mm bore hits a middle ground with 245.3N, ideal when you need 50mm of on-site extend tuning and high-speed cushioning without stepping up to a 1/4" port. Choose the MFCJ when changeovers require both stroke length tweaks and shock absorption.
Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover). Remember that the air cushion only decelerates near stroke end—it is not a lock. If gravity or air loss risks dropping a load, install an external rod lock or pilot check valve, as the piston will drift.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Back cover (CA/U/CM) & mount (LB/FA/SDB/TC)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Do not dismantle the riveted front/back covers.
- check Use correct back cover (CA/U/CM) & mount (LB/FA/SDB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-50S FAQ
This 25mm bore cylinder has a 1/8" port and a 250mm base stroke with a 50mm adjustable extend window (usable 200-250mm). It provides 245.3N push / 206.1N pull at 0.5MPa, 343.4N push / 288.5N pull at 0.7MPa, and a theoretical max of 50kgf at 1.0MPa.
Yes, the -S suffix means it has a piston magnet for CMSG, DMSG, or EMSG switches. The external adjuster only shortens the extend end position—it is not a mid-stroke lock. The variable air cushion decelerates motion but cannot hold a load on air loss; use an external rod lock for holding.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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