Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-30
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-30 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 MFCJ25X250-30
Dial in exact end positions and absorb high-speed shock with this double-acting, adjustable-stroke mini cylinder. An external adjuster lets you shorten the extend stroke by up to 30 mm on site, while the needle-set variable air cushion at both ends ensures smooth deceleration. The JIS-standard round-body build features a SUS304 stainless barrel and riveted aluminium covers, making the overall body shorter than an ISO 6432 cylinder for the same 25 mm bore and 250 mm stroke.
Delivering 245.3 N push and 206.1 N pull at 0.5 MPa, this model handles a safe working load of roughly 147 N. It lifts about 12.5 kg vertically with a 2:1 margin. The 1/8" port and Ø10 mm rod keep the footprint compact. Note this SKU lacks a magnet (-S), so it cannot accept CMSG, DMSG, or EMSG sensors.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-30 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-30 |
|---|---|
| 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 MFCJ25X250-30
| 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 MFCJ25X250-30 Is Used
High-Speed Component Pressing
Tune the exact 220-250 mm extend position on the fly for delicate assembly presses, using the variable air cushion to absorb the 245.3 N impact without shock loading the workpiece.
Variable-Length Sorting Diverter
Adjust the extend stroke by up to 30 mm to accommodate different package sizes on a packaging line, relying on the cushion to handle 800 mm/s actuation speeds smoothly.
Vertical Lift Gates
Lift gates or lightweight flaps weighing up to 12.5 kg, tweaking the endpoint during installation; pair with an external check valve to prevent drift since the cushion provides no holding force.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-30 the Right Cylinder?
When sizing this adjustable family, compare both ways: the MFCJ20 bore provides 157 N of push force at 0.5 MPa, while the larger MFCJ32 offers 402.2 N. This 25 mm bore strikes a middle ground at 245.3 N, ideal when you need moderate force plus on-site stroke tuning. The 30 mm adjustable window is perfect for changeovers where the exact extend endpoint is unknown until commissioning.
Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover mount). Remember that the air cushion only decelerates the piston near stroke end—it is not a lock or brake. If the application must hold a load vertically during air loss, add an external rod lock or pilot-operated 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 MFCJ25X250-30 FAQ
This 25 mm bore cylinder has a 1/8" port and a Ø10 mm rod. It generates 245.3 N push and 206.1 N pull at 0.5 MPa, 343.4 N push and 288.5 N pull at 0.7 MPa, with a theoretical maximum of 50 kgf at 1.0 MPa.
No, this specific SKU does not include a magnet (-S), so it cannot accept CMSG, DMSG, or EMSG switches. You can adjust the extend stroke by up to 30 mm and tune the needle air cushion, but position sensing requires the -S variant.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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