Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X25SU
The AirTAC Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X25SU is a genuine double acting + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 25mm 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
- Stroke25 mm
- Port size1/4"
- Acting typeDouble acting + cushion
- Rod threadM14×1.5
- CushionVariable air cushion, both ends
About the Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X25SU
Delivering 628.3 N of push force at 0.5 MPa, this 40 mm bore double-acting mini cylinder handles heavy loads with precision. The riveted SUS304 stainless barrel and aluminium covers resist mild corrosion and washdown environments. For the same bore and stroke, the JIS-standard round body is noticeably shorter than an ISO 6432 cylinder, saving valuable mounting length.
A variable air cushion at both ends lets you turn a needle to soak up high-speed end-of-stroke shock, protecting the payload and cutting noise. The -S suffix means a built-in piston magnet is present for CMSG, DMSG or EMSG switches, and the U flat-end back cover supports direct mounting. With a practical safe working load around 377 N, it lifts about 32 kg vertically with a 2:1 margin.
Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X25SU Technical Specifications
| Model | Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X25SU |
|---|---|
| Series | MFC JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 mm |
| Acting type | Double acting + 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 MFC Cushioned Stainless Steel Mini Cylinder MFC40X25SU
| MFC | JIS-standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 MFC Cushioned Stainless Steel Mini Cylinder MFC40X25SU Is Used
Heavy Clamping
Secures dense metal workpieces during machining, using its 628.3 N thrust to prevent vibration while the air cushion absorbs the impact of rapid closure.
Vertical Pressing
Drives bearings or pins into housings, where the needle-tuned end cushioning protects the assembly from a harsh metal-on-metal slam at the stroke bottom.
Pallet Halting
Stops loaded pallets on a line, using the 1/4 inch port for rapid response and the U flat-end cover for flush rear mounting against machine frames.
Is the Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X25SU the Right Cylinder?
If 628.3 N at 0.5 MPa is excessive, step down to the MFC32 which provides 402.2 N; as this is the largest bore in the series, no larger MFC size exists. The adjustable air cushion is essential when cycling at high speeds or moving heavy masses, as it decelerates the piston smoothly. It is strictly a deceleration device, not a lock.
Because a standard cylinder drifts when air pressure drops or the valve is centred, you must add an external rod lock or pilot-operated check valve to hold a suspended load. This model includes the -S magnet for position sensing and features a 1/4 inch port alongside an M14x1.5 male rod thread.
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 MFC Cushioned Stainless Steel Mini Cylinder MFC40X25SU FAQ
This 40 mm bore cylinder features a 1/4 inch port and an M14x1.5 male rod 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 maximum of 128.1 kgf at 1.0 MPa.
No, the variable air cushion only decelerates the piston near stroke end and acts purely as a shock absorber, never a brake. To prevent drift on air loss, you must install an external rod lock or pilot check valve. The -S magnet enables CMSG, DMSG and EMSG sensors for position feedback.
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