Airtac MFCJ Adjustable Mini Cylinder MFCJ25X40-40S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X40-40S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø25mm bore and 40mm 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
- Stroke40 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 MFCJ25X40-40S
Dial in the extend travel right at the fixture with the AirTAC MFCJ25X40-40S, a JIS-standard round-body mini cylinder that lets you shorten the outward stroke by up to 40 mm on-site. The SUS304 stainless barrel and riveted aluminium covers yield a shorter mounting envelope than an ISO 6432 unit, while the built-in magnet (-S) supports CMSG, DMSG, and EMSG position switches.
Driven by filtered air at 0.15-1.0 MPa through a 1/8" port, this double-acting actuator generates 245.3 N of push force at 0.5 MPa. Needle-set variable air cushions at both ends absorb end-of-stroke shock across the 30-800 mm/s speed range. Based on the 0.5 MPa thrust, it handles a safe working load of roughly 147 N, lifting about 12.5 kg vertically with a 2:1 margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X40-40S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X40-40S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 40 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 MFCJ25X40-40S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×40 | 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 MFCJ25X40-40S Is Used
Adjustable Push Stations
Fine-tune the 0-40 mm extend endpoint during product changeovers to press or align parts gently using the 245.3 N thrust output.
High-Speed Diverters
Use the variable air cushion to silently stop the piston at high cycle rates without slamming, ideal for lightweight package routing.
Lab Test Actuators
Leverage the compact JIS body and 1/8" port to apply a safe 147 N working load in shock-sensitive trial-fit and testing jigs.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X40-40S the Right Cylinder?
Weighing the bore sizes, the MFCJ20 provides 157 N of push force at 0.5 MPa, whereas this MFCJ25 hits 245.3 N; stepping up to the MFCJ32 yields 402.2 N. Choose the 25 mm bore when your trial-fit mechanism needs moderate push power combined with on-site stroke tuning and high-speed cushioning. The 40 mm adjustable window is perfect for changeovers where the exact extend endpoint varies.
Remember that the air cushion only decelerates the piston near the end of travel—it does not lock or hold the load. If gravity or air loss could cause drift, fit an external rod lock or pilot check valve. For mounting, select LB foot, FA flange, or TC trunnion brackets (SDB and back-cover mounts are unavailable). The -S magnet version is required if you intend to use CMSG, DMSG, or EMSG sensors.
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 MFCJ25X40-40S FAQ
This 25 mm bore cylinder features a 1/8" air port and a 10 mm rod with an M10x1.25 male thread. It delivers 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 force of 50 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 40 mm on-site, while the retract stroke remains full. Needle-set variable air cushions at both ends absorb high-speed end-of-stroke shock. The -S suffix indicates a built-in magnet for CMSG, DMSG, or 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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