Airtac MFCJ Adjustable Mini Cylinder MFCJ25X300-40
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X300-40 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø25mm bore and 300mm 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
- Stroke300 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 MFCJ25X300-40
Dial in exact end positions and absorb high-speed shock with the AirTAC MFCJ25X300-40 adjustable-stroke mini cylinder. This JIS-standard round-body actuator features a SUS304 stainless barrel and riveted aluminium covers, offering a shorter mounting envelope than an ISO 6432 unit for the same 25 mm bore and 300 mm stroke. An external adjuster shortens the extend stroke by up to 40 mm on-site, while needle valves set the variable air cushion at both ends.
Delivering 245.3 N push force at 0.5 MPa (206.1 N pull) through a 1/8" port, it handles a safe working load of roughly 147 N or lifts about 12.5 kg vertically with a 2:1 margin. This non-magnet SKU cannot host a sensor; add the -S option for CMSG/DMSG/EMSG switches. Note the cushion only decelerates the load—it is not a brake.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X300-40 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X300-40 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 300 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 MFCJ25X300-40
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×300 | 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 MFCJ25X300-40 Is Used
High-Speed Sorter Divert
Tune the 40 mm extend window to set the exact divert arm reach, while the variable air cushion silently halts the 245.3 N push force at high cycle rates.
Carton Flap Folding
Adjust the extend endpoint on the fly for mixed carton sizes; the needle cushion absorbs the shock of rapid folding motions without slamming.
Light Press Fit
Safely press 12.5 kg assemblies by dialing in the exact 300 mm extend stop, relying on the cushion to decelerate the tooling before contact.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X300-40 the Right Cylinder?
When sizing this 25 mm bore, compare it directly: an MFCJ20 provides 157 N push at 0.5 MPa, while an MFCJ32 jumps to 402.2 N. The MFCJ25X300-40 fits neatly in the middle for medium-duty changeovers where both the extend endpoint and end-of-stroke shock need on-site tuning. The 40 mm adjuster window lets you fine-tune the 300 mm stroke during trial fits without machining.
Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover). Because this specific SKU lacks a magnet, it cannot accept position sensors. Remember that a standard cylinder drifts on air loss—the cushion decelerates but does not lock—so specify 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 MFCJ25X300-40 FAQ
This 25 mm bore cylinder uses a 1/8" 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 max force is 50 kgf at 1.0 MPa. It features a 10 mm rod with an M10x1.25 male thread.
No, this specific SKU does not include a magnet and cannot accept CMSG, DMSG, or EMSG switches. You must select the -S variant for sensing capabilities. The external adjuster shortens the extend stroke by up to 40 mm, and the variable air cushion decelerates the load but does not lock it.
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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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