Airtac MFCJ Adjustable Mini Cylinder MFCJ25X50-20
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X50-20 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø25mm bore and 50mm 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
- Stroke50 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 MFCJ25X50-20
Dial in exact end positions and absorb high-speed shock with the AirTAC MFCJ25X50-20. This double-acting JIS-standard round-body mini cylinder pairs a 20 mm extend-stroke adjuster with needle-set variable air cushions at both ends, letting you trim the 50 mm extend travel down to 30 mm on-site for precise changeovers. The riveted SUS304 stainless barrel and aluminium covers form a compact body that is shorter than an ISO 6432 cylinder for the same bore and stroke, resisting mild washdown while saving mounting length.
Delivering 245.3 N push force at 0.5 MPa (206.1 N pull) through a 1/8" port, it yields a safe working load of about 147 N, lifting roughly 12.5 kg vertically with a 2:1 margin. The Ø10 mm rod uses an M10x1.25 male thread. Note this SKU lacks the -S magnet, so it cannot host CMSG/DMSG/EMSG sensors; mount via LB foot, FA flange or TC trunnion (no SDB).
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X50-20 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X50-20 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 50 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 MFCJ25X50-20
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×50 | 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 MFCJ25X50-20 Is Used
Adjustable Tooling Stops
Fine-tune the 30-50 mm extend reach on the fly for multi-part machining fixtures, relying on the 245.3 N push force to set precise stop positions without swapping cylinders.
High-Speed Diverters
Soak up end-of-stroke shock on fast sorting gates using the variable air cushion, preventing slam damage while the 20 mm adjuster dials in the exact divert distance.
Carton Flap Folders
Tune the extend stroke on-site for varying box sizes; the SUS304 body handles mild washdown, and the 147 N safe working load easily folds lightweight packaging flaps.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X50-20 the Right Cylinder?
When sizing this adjustable family, weigh the MFCJ25 against its siblings: the MFCJ20 provides 157 N push at 0.5 MPa for lighter tasks, while the MFCJ32 jumps to 402.2 N for heavier fixtures. The MFCJ25 sits neatly in the middle, ideal when you need 245.3 N of push but still want a compact footprint. Choose the adjustable-stroke plus variable-cushion combo for high-speed changeovers or shock-sensitive trial fits where both the end position and deceleration need tuning.
Remember the cushion only decelerates near stroke end—it is not a lock or brake. If air drops, the piston drifts; for a held load, fit an external rod lock or pilot check valve. This non-magnet SKU cannot take a sensor; add the -S variant if you need CMSG/DMSG/EMSG position feedback.
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 MFCJ25X50-20 FAQ
This 25 mm bore cylinder has a 1/8" port and an M10x1.25 rod thread. It generates 245.3 N push and 206.1 N pull at 0.5 MPa, or 343.4 N push and 288.5 N pull at 0.7 MPa, with a theoretical max of 50 kgf at 1.0 MPa. It features variable air cushions at both ends and operates at 30-800 mm/s.
No. The external adjuster only shortens the extend stroke by up to 20 mm (usable 30-50 mm); it does not lock the position. The air cushion solely decelerates near the end. Additionally, this SKU lacks the -S magnet, so it cannot accept CMSG/DMSG/EMSG sensors. For position feedback, choose the -S variant.
Authorized Export Seller
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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