Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-75S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-75S 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 MFCJ40X225-75S
Tune extend travel on-site with the AirTAC MFCJ40X225-75S, a double-acting JIS-standard round-body mini cylinder featuring a 75 mm adjustable window and variable air cushions at both ends. The SUS304 stainless barrel and riveted aluminium covers yield a shorter mounting envelope than an ISO 6432 unit, while the 1/4" port and M14x1.5 male rod thread handle robust pneumatic flow.
Delivering 628.3 N of push force at 0.5 MPa (879.6 N at 0.7 MPa), this bore 40 unit is built for high-speed changeovers. The needle cushions absorb end-of-stroke shock, and the -S magnet enables CMSG, DMSG or EMSG switches. With a safe working load around 377 N, it lifts about 32 kg vertically.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-75S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-75S |
|---|---|
| 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 MFCJ40X225-75S
| 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 MFCJ40X225-75S Is Used
High-Speed Diverting
Dial in the 150-225 mm extend stroke to push heavy cartons off a line, using the variable air cushion to stop the 628.3 N thrust smoothly at high cycle rates.
Machine Changeovers
Adapt to new product lengths on the fly using the 75 mm external adjuster, avoiding mechanical rebuilds while the needle cushion absorbs end-of-stroke shock.
Vertical Lift Gates
Lift loads up to 32 kg in material handling gates, relying on the SUS304 stainless body for mild washdown resistance and the -S magnet for position feedback.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X225-75S the Right Cylinder?
When sizing an adjustable-stroke cylinder, compare the bores directly: this 40 mm bore provides 628.3 N of push force at 0.5 MPa, whereas the smaller MFCJ32 delivers 402.2 N. Choose the 40 mm bore when moving heavier fixtures, and rely on the 75 mm adjuster to dial in the exact 150 to 225 mm extend position during trial fits.
The variable air cushion is ideal for shock-sensitive, high-speed motion, but remember it only decelerates the piston near the end of travel. It does not function as a lock or brake. If your application must hold a load vertically during air loss, install an external rod lock or pilot check valve. Mount via LB foot, FA flange, or TC trunnion (no SDB), and use the -S magnet for 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 MFCJ40X225-75S FAQ
This double-acting cylinder features a 40 mm bore, 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, 879.6 N push and 738.9 N pull at 0.7 MPa, with a theoretical max force of 128.1 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 75 mm on-site, giving a usable extend range of 150 to 225 mm, while the retract stroke remains full. The variable air cushion at both ends uses a needle valve to decelerate the piston smoothly at high speeds, but it is not a brake. The -S option includes a magnet for CMSG, DMSG, or EMSG sensors.
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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