Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-20
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-20 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 MFCJ25X250-20
Dial in exact extend stops and absorb high-speed shock with the AirTAC MFCJ25X250-20, a JIS-standard round-body mini cylinder. The external adjuster shortens the extend stroke by up to 20 mm (usable range 230-250 mm), while needle air cushions at both ends soak up end-of-stroke impact. Built with a SUS304 stainless barrel and riveted aluminium covers, it is shorter than an ISO 6432 cylinder for the same bore and stroke, resisting mild corrosion and washdown.
This 25 mm bore, double-acting actuator uses a 1/8" port and a Ø10 mm rod with an M10x1.25 male thread. It delivers 245.3 N push force at 0.5 MPa, yielding a safe working load of about 147 N. It lifts roughly 12.5 kg vertically with a 2:1 margin. Note this SKU lacks the -S magnet, so it cannot accept CMSG/DMSG/EMSG sensors.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-20 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-20 |
|---|---|
| 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 MFCJ25X250-20
| 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 MFCJ25X250-20 Is Used
Adjustable Tooling Stops
Fine-tune the extend position up to 20 mm during machine changeovers to accommodate different part lengths without remachining hard stops.
High-Speed Diverter Gates
Use the variable air cushion to decelerate the 245.3 N extend force smoothly at high cycling speeds, preventing end-cap impact on sorting lines.
Variable Stroke Pushers
Adjust the extend stroke on-site to push cartons of varying widths, ensuring gentle contact without repositioning the entire cylinder assembly.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-20 the Right Cylinder?
Choose between the available bores based on your force needs: the MFCJ20 provides 157 N push at 0.5 MPa, this MFCJ25 hits 245.3 N, and the MFCJ32 outputs 402.2 N. Pick the MFCJ25 when you need moderate force plus on-site stroke tuning for changeovers. The 20 mm adjustable window lets you trial-fit parts without machining new stops, and the variable air cushion handles speeds up to 800 mm/s.
Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover). Because this non-S SKU cannot take a sensor, add the -S variant if you need position detection. The cylinder does not hold load on air loss—the piston drifts—so fit an external rod lock or pilot check valve for suspended loads.
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 MFCJ25X250-20 FAQ
This 25 mm bore cylinder has a 1/8" port. At 0.5 MPa it pushes 245.3 N and pulls 206.1 N. At 0.7 MPa it pushes 343.4 N and pulls 288.5 N. The theoretical maximum force is 50 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 20 mm (usable range 230-250 mm); retract remains full. The needle air cushions only decelerate near the ends—they are not brakes. This specific SKU lacks a magnet, so it cannot accept CMSG/DMSG/EMSG sensors; choose the -S version for sensing.
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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.
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Most inquiries answered within 7-8 hours.
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