Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-30
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-30 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 225mm stroke, 1/4" 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.
- BoreØ40 mm
- Stroke225 mm
- Port size1/4"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM14×1.5
- 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 MFCJ40X225-30
Tune both travel and end-of-stroke shock on-site with this double-acting, adjustable-stroke mini cylinder. The external adjuster shortens the 225 mm extend stroke by up to 30 mm (usable range 195-225 mm), while the needle variable air cushion at both ends soaks up high-speed impact. As a JIS-standard round-body unit, its SUS304 stainless barrel and riveted aluminium covers form a shorter body than an ISO 6432 cylinder for the same bore and stroke, resisting mild washdown.
In the 40 mm bore class, this cylinder delivers a strong 628.3 N push and 527.8 N pull at 0.5 MPa, peaking at a 128.1 kgf theoretical maximum at 1.0 MPa. For sizing a vertical lift, the 0.5 MPa push force yields about 32 kg of lift capacity with a 2:1 safety margin. The 1/4" port and M14x1.5 male rod thread match the robust 16 mm piston rod. Note this specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG or EMSG reed switches.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-30 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-30 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 225 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/4" |
| Rod thread | M14×1.5 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 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 MFCJ40X225-30
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | 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 MFCJ40X225-30 Is Used
High-Speed Diverters
Uses the 628.3 N push force to deflect heavy cartons, while the 30 mm stroke adjuster dials in the exact contact point for varying box sizes.
Carton Sealing Press
Variable air cushions absorb the 225 mm stroke impact at high cycling speeds, preventing crushing while the adjuster sets the precise flap closure depth.
Pallet Stopper Gate
Lifts about 32 kg vertically on the extend stroke; the 30 mm window fine-tunes the stopping height to match different pallet load profiles.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-30 the Right Cylinder?
Choose between the two available bores based on your force needs: this MFCJ40 provides 628.3 N push at 0.5 MPa, whereas the smaller MFCJ32 offers 402.2 N. The 40 mm bore is preferred for heavier high-speed conveyance where the adjustable 30 mm stroke window allows precise trial fits without machining. The variable air cushion is essential here to decelerate the larger payload smoothly.
Remember the air cushion only decelerates the piston near the end of stroke; it is not a brake. If the load must hold position on air loss, install 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). Because this non-S SKU has no magnet, add the -S option if you need position sensing.
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 MFCJ40X225-30 FAQ
This 40 mm bore cylinder features a 1/4" port and a 16 mm rod with an M14x1.5 male thread. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, increasing to 879.6 N push and 738.9 N pull at 0.7 MPa. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
No, this specific SKU does not include a magnet, so it cannot accept CMSG, DMSG or EMSG switches. You must select the -S variant for sensing. The 30 mm external adjuster shortens the extend stroke from 195 to 225 mm, and the variable air cushion decelerates the load but does not lock it.
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1-Year Warranty
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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