Airtac MFCJ Adjustable Mini Cylinder MFCJ25X40-30S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X40-30S 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 MFCJ25X40-30S
Dial in exact end positions and absorb high-speed shock with the AirTAC MFCJ25X40-30S, a JIS-standard round-body mini cylinder. An external adjuster shortens the extend stroke by up to 30mm, while needle-set variable air cushions at both ends soak up end-of-stroke impact. The riveted SUS304 stainless barrel and aluminium covers yield a shorter mounting envelope than an ISO 6432 unit of the same bore.
Driven by a 25mm bore and 1/8" port, this double-acting actuator delivers 245.3N push and 206.1N pull at 0.5MPa. The built-in -S magnet supports CMSG, DMSG, or EMSG switches for position sensing. With a safe working load around 147N, it lifts about 12.5kg vertically with a 2:1 margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X40-30S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X40-30S |
|---|---|
| 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 MFCJ25X40-30S
| 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 MFCJ25X40-30S Is Used
Light Part Ejection
Tunes the extend endpoint within a 30mm window to strike small plastic parts accurately, using the 245.3N push force to clear moulds without damaging components.
High-Speed Diverting
Variable air cushions absorb the shock of rapid 30-800mm/s routing strokes, preventing bounce when pushing light cartons between conveyor lanes.
Adjustable Stop Gates
Provides a cushioned, on-site adjustable physical stop for varying package sizes, holding safely with a 147N working load during pallet build-up.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X40-30S the Right Cylinder?
Choose this 25mm bore when you need 245.3N push at 0.5MPa; step down to an MFCJ20 for 157N, or up to an MFCJ32 for 402.2N. The 30mm adjustable window is perfect for trial fits and high-speed changeovers where the exact extend endpoint and deceleration both require on-site tuning. Mount via LB foot, FA flange, or TC trunnion.
The -S magnet enables CMSG, DMSG, or EMSG sensors for position feedback. Remember that the air cushion only decelerates the piston near stroke end—it is not a brake. If the load must be held on air loss, install an external rod lock or pilot 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 MFCJ25X40-30S FAQ
This 25mm bore cylinder uses a 1/8" port and a 10mm rod with M10x1.25 male thread. It generates 245.3N push and 206.1N pull at 0.5MPa, 343.4N push and 288.5N pull at 0.7MPa, with a theoretical maximum of 50kgf at 1.0MPa.
The external adjuster shortens the extend stroke by up to 30mm on-site, while the needle-set variable air cushion at both ends decelerates the piston for smooth stops. The -S suffix means it has a built-in magnet for CMSG, DMSG, or EMSG sensors; the cushion decelerates but does not lock the load.
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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