Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X125U
The AirTAC Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X125U is a genuine double acting + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 125mm 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
- Stroke125 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 MFC40X125U
Delivering 628.3 N of push force at 0.5 MPa, this double-acting round-body mini cylinder handles heavy loads with precision. The SUS304 stainless barrel and riveted aluminium covers resist mild corrosion, while the U flat-end back cover suits tight rear mounting spaces. For the same bore and stroke, the JIS-standard MFC body is shorter than an ISO 6432 cylinder, saving valuable machine length.
A variable air cushion at both ends lets you dial in the needle valve to absorb high-speed end-of-stroke shock, protecting the payload and reducing noise. Based on the 0.5 MPa push rating, it provides a safe working load of about 377 N, lifting roughly 32 kg vertically with a 2:1 margin. Note this SKU lacks the -S magnet, so it cannot accept CMSG, DMSG or EMSG sensors.
Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X125U Technical Specifications
| Model | Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X125U |
|---|---|
| Series | MFC JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 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 MFC40X125U
| MFC | JIS-standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×125 | 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 MFC40X125U Is Used
Heavy Carton Diversion
Pushes heavy packaged goods across a high-speed belt line using the full 628.3 N thrust, with the variable air cushion preventing harsh impacts at the end of the 125 mm stroke.
Press Ejection
Ejects dense formed parts from a press bed, relying on the 1/4 inch port for rapid exhaust and the U flat-end cover for flush rear mounting against the machine frame.
Pallet Stopper
Halts loaded pallets on a gravity roller conveyor; the needle-set cushion absorbs the kinetic energy of the load instead of transferring a shock spike to the cylinder covers.
Is the Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X125U the Right Cylinder?
If 628.3 N at 0.5 MPa is excessive, step down to the MFC32 bore which provides 402.2 N; as this is the largest MFC bore, there is no larger standard option for higher force demands. The adjustable air cushion is essential when cycling at high speeds or moving heavy masses, as it decelerates the piston smoothly without slamming.
Because this is a plain cylinder without a magnet, position sensing is unavailable on this unit. Furthermore, the air cushion only decelerates near the stroke end and does not act as a brake; the piston will drift on air loss. For suspended or vertical loads, install 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 MFC Cushioned Stainless Steel Mini Cylinder MFC40X125U FAQ
This 40 mm bore cylinder features a 1/4 inch port and a 16 mm rod. 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 the -S magnet option, so it cannot accept CMSG, DMSG or EMSG switches. You would need the -S variant for sensing, and you can choose LB, FA, SDB or TC mountings alongside the U flat-end rear cover.
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