Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-40S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-40S 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 MFCJ40X225-40S
Dial in exact extend lengths on-site with the AirTAC MFCJ40X225-40S, a double-acting JIS-standard round-body mini cylinder featuring a 40 mm adjustable stroke window and variable air cushions at both ends. The SUS304 stainless barrel and riveted aluminium covers yield a body that is physically shorter than an ISO 6432 unit of the same bore and stroke, saving valuable machine space while resisting mild washdown corrosion.
Driven by a 16 mm rod through a 1/4" port, this 40 mm bore generates 628.3 N of push force at 0.5 MPa, translating to a safe working load of roughly 377 N or a 32 kg vertical lift with a 2:1 margin. The needle cushions soak up end-of-stroke shock at speeds up to 800 mm/s, and the built-in -S magnet directly supports CMSG, DMSG, or EMSG reed and electronic sensors for position feedback.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-40S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-40S |
|---|---|
| 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 MFCJ40X225-40S
| 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 MFCJ40X225-40S Is Used
High-Speed Machining Clamps
Tune the 225 mm extend position by up to 40 mm on the fly to clamp raw castings of varying widths, relying on the 628.3 N push force and needle air cushions to absorb rapid deceleration.
Dynamic Sorting Diverter
Adjust the diverter stroke precisely for mixed package sizes while the variable cushion prevents end-of-stroke slamming during fast 800 mm/s cycling.
Vertical Carton Lift
Lift cartons up to 32 kg vertically using the 0.5 MPa push force, fine-tuning the lift height within the 40 mm window to match varying pallet stack heights.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-40S the Right Cylinder?
When sizing this series, compare the real thrust: the 40 mm bore delivers 628.3 N push at 0.5 MPa, whereas the smaller MFCJ32 provides 402.2 N. Choose the 40 mm bore when moving heavier fixtures, and use the 40 mm external adjuster to fine-tune the extend end position anywhere from 185 to 225 mm without swapping cylinders during high-speed changeovers.
Remember that the variable air cushion only decelerates the piston near the stroke ends—it is not a brake. If gravity or air loss could cause the load to drift, install an external rod lock or pilot check valve. For mounting, select LB foot, FA flange, or TC trunnion brackets (SDB is unavailable), and rely on the included -S magnet for switch 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 MFCJ40X225-40S FAQ
This 40 mm bore cylinder features a 1/4" port and a 16 mm rod. 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, with a theoretical max of 128.1 kgf at 1.0 MPa. The 225 mm base stroke has a 40 mm adjustable extend window, and the -S suffix indicates a built-in magnet for CMSG/DMSG/EMSG sensors.
No. The needle air cushion only decelerates the piston near the end of stroke to reduce shock, and the external adjuster only sets the extend end position. Neither acts as a lock or brake. If the air supply drops, the piston will drift. Use an external rod lock or pilot check valve to hold a load securely.
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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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