Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X125SU
The AirTAC Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X125SU 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 MFC40X125SU
Taming high-speed shock in tight spaces, the AirTAC MFC40X125SU is a JIS-standard round-body mini cylinder built for demanding work. It delivers a robust 628.3 N push force at 0.5 MPa, making it the heavy hitter of the MFC family. The riveted aluminium covers and SUS304 stainless barrel shrug off mild corrosion and washdown environments. For the same 40 mm bore and 125 mm stroke, this body is noticeably shorter than an ISO 6432 cylinder, saving valuable mounting length.
A defining trait is the variable air cushion at both ends, letting you dial in a needle to soak up end-of-stroke impact at high speeds. This protects your payload and cuts noise far better than a fixed bumper. Because this SKU carries the -S suffix, a built-in piston magnet enables CMSG, DMSG, or EMSG switches for position sensing. Based on the 0.5 MPa thrust, expect a safe working load around 377 N, lifting about 32 kg vertically with a 2:1 margin.
Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X125SU Technical Specifications
| Model | Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X125SU |
|---|---|
| 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 MFC40X125SU
| 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 MFC40X125SU Is Used
Package Diverting
Handles heavy carton diversion on high-speed conveyors where the 628.3 N push force and adjustable cushion absorb the abrupt directional changes without slamming.
Press Ejection
Ejects dense metal or moulded parts from a press, using the 1/4 inch port and variable air cushion to prevent part damage during rapid retraction.
Pallet Lift Stops
Acts as a robust stop for loaded pallets, relying on the SUS304 stainless barrel to withstand dusty warehouse environments while safely halting the load.
Is the Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X125SU the Right Cylinder?
If 628.3 N of push at 0.5 MPa is too much force, step down to the MFC32, which provides 402.2 N; since 40 mm is the largest bore in the series, you would need to gang multiple cylinders for higher loads. Choose this variable-cushion model when cycling at high speeds or moving heavy masses, as the adjustable needles let you smooth out the deceleration phase perfectly.
Remember that the air cushion only decelerates the piston near the stroke end and does not function as a brake. If your setup must hold a load vertically during air loss or when a valve is centred, the piston will drift, so you must add an external rod lock or a pilot-operated check valve. This specific configuration features a U flat-end back cover and includes the -S magnet for sensor readiness.
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 MFC40X125SU FAQ
This 40 mm bore cylinder features a 1/4 inch air 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, increasing to 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.
Yes, the -S suffix means it has a built-in magnet for CMSG, DMSG, or EMSG switches. The variable air cushion at both ends uses a needle valve to tune deceleration, reducing shock at high speeds, but it only slows the piston near stroke end and does not lock the load.
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