Airtac MFCJ Adjustable Mini Cylinder MFCJ25X225-40S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X225-40S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø25mm bore and 225mm 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
- Stroke225 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 MFCJ25X225-40S
Tune the extend stroke precisely on-site with the AirTAC MFCJ25X225-40S, a JIS-standard round-body mini cylinder that shortens the forward travel by up to 40 mm (yielding a usable 185-225 mm range). The SUS304 stainless barrel and riveted aluminium covers form a compact body that is physically shorter than a comparable ISO 6432 unit, saving valuable mounting length while resisting mild washdown corrosion. A 1/8" port feeds the 10 mm rod (M10x1.25 male thread).
Driven by double-acting air at 0.15-1.0 MPa, this unit generates 245.3 N of push force at 0.5 MPa, translating to a safe working load of roughly 147 N or a 12.5 kg vertical lift with a 2:1 margin. Needle-set variable air cushions at both ends absorb high-speed end-of-stroke shock for quiet 30-800 mm/s operation. The -S suffix equips the piston with a magnet for CMSG, DMSG or EMSG position sensing.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X225-40S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X225-40S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 225 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 MFCJ25X225-40S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×225 | 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 MFCJ25X225-40S Is Used
Adjustable Forming Press
Dial in the 185-225 mm extend stroke on-site for trial press fits, relying on the 245.3 N push force and variable air cushion to prevent impact marking on delicate metal parts.
High-Speed Divert Gate
Actuate a routing flap at up to 800 mm/s; the needle cushion absorbs the end-of-stroke shock while the CMSG sensor confirms gate position for the PLC.
Variable-Depth Carton Stopper
Accommodate mixed packaging lengths by adjusting the 40 mm extend window, lifting or stopping loads up to 12.5 kg vertically without slamming.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X225-40S the Right Cylinder?
When sizing this adjustable family, compare the real thrust: the MFCJ20 delivers 157 N @0.5 MPa, this MFCJ25 provides 245.3 N, and the larger MFCJ32 outputs 402.2 N. Choose the 25 mm bore when your changeover fixture needs moderate force plus the ability to dial in the exact extend position and deceleration on the fly. The 40 mm adjuster window is ideal for trial-fit stations where end-of-stroke shock must be gently soaked up by the variable air cushion rather than a hard bumper.
Mounting options include LB foot, FA flange and TC trunnion (no SDB or back-cover variant). Remember the cushion only decelerates near the stroke end—it is not a brake; if the load must hold position on air loss, install an external rod lock or pilot check valve. Because this SKU includes the -S magnet, you can directly mount CMSG, DMSG or EMSG sensors for closed-loop confirmation.
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 MFCJ25X225-40S FAQ
This double-acting cylinder uses a 1/8" air port and generates 245.3 N push / 206.1 N pull at 0.5 MPa, and 343.4 N push / 288.5 N pull at 0.7 MPa. The theoretical maximum force is 50 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 40 mm (usable range 185-225 mm); retract remains full. Needle variable air cushions at both ends decelerate the piston near the ends for smooth stops. The -S suffix means it has a built-in magnet for CMSG/DMSG/EMSG sensors.
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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