Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-30S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-30S 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 MFCJ40X225-30S
Dial in your extend stroke on-site with the AirTAC MFCJ40X225-30S, a JIS-standard round-body mini cylinder built with a SUS304 stainless barrel and riveted aluminium covers. An external adjuster shortens the extend end by up to 30 mm (usable range 195-225 mm), while a needle-set variable air cushion at both ends soaks up high-speed shock. The 1/4" port feeds a 16 mm rod, delivering a robust 628.3 N push force at 0.5 MPa.
This double-acting actuator runs at 30-800 mm/s and features a built-in piston magnet (-S) for CMSG, DMSG, or EMSG switches. It offers a safe working load of about 377 N (roughly 60% of the 0.5 MPa push force) and lifts approximately 32 kg vertically with a 2:1 margin. For the same bore and stroke, this compact JIS body is shorter than an ISO 6432 cylinder, saving valuable mounting length without claiming ISO compliance.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-30S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-30S |
|---|---|
| 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 MFCJ40X225-30S
| 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 MFCJ40X225-30S Is Used
High-Speed Diverters
Tune the 195-225 mm extend stroke on-site to match varying package sizes, using the variable air cushion to quietly stop the 628.3 N push force at high cycle speeds.
Press Fit Tuning
Dial in the exact 30 mm adjustment window during tooling changeovers to find the perfect insertion depth without swapping the entire cylinder.
Vertical Lift Stops
Lifts about 32 kg vertically with a 2:1 margin; the needle cushion absorbs the downward shock at stroke end, though a pilot check valve is needed to hold the load.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-30S the Right Cylinder?
When sizing these adjustable-stroke cylinders, compare the real thrust: this 40 mm bore provides 628.3 N push at 0.5 MPa, whereas the smaller MFCJ32 delivers 402.2 N. Choose the 40 mm bore when moving heavier payloads and use the 30 mm adjust window for high-speed changeovers or trial fits where the exact end position and end-of-stroke shock both need tuning. The -S magnet enables CMSG, DMSG, or EMSG sensors, and you can mount via LB foot, FA flange, or TC trunnion (no SDB or back-cover here).
Remember that the air cushion only decelerates the piston near the stroke end; it is not a brake. If your application must hold a load on air loss or a centred valve, the piston will drift, so you must add an external rod lock or pilot-operated check valve.
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 MFCJ40X225-30S FAQ
This 40 mm bore cylinder has 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, or 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.
The external adjuster shortens the extend stroke by up to 30 mm on-site (usable range 195-225 mm), but it does not lock the piston mid-stroke. A variable air cushion at both ends decelerates the load near the end of travel. The built-in -S magnet allows CMSG, DMSG, and EMSG sensors for position detection.
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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