Airtac MF32-40 Stainless Steel Mini Cylinder MF40X125U
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF40X125U is a genuine double acting 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
- Rod threadM14×1.5
- CushionFixed TPU bumper pads
- 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 MF32-40 Stainless Steel Mini Cylinder MF40X125U
Delivering 628.3 N of push force at 0.5 MPa, this double-acting 40 mm bore mini cylinder is built around a SUS304 stainless barrel with riveted aluminium covers that resist mild washdown. The JIS-standard round-body design is physically shorter than a comparable ISO 6432 unit for the same 125 mm stroke, saving valuable mounting length in tight machinery. Because the base SKU lacks the -S magnet, it cannot accept CMSG, DMSG or EMSG position switches.
A heterogeneous two-way seal on the piston retains an oil film for long service life, while fixed TPU bumper pads and a front-cover anti-impact pad absorb stroke-end shock. Plan for roughly 377 N of actual work at 0.5 MPa to maintain a safe margin, which equates to lifting about 32 kg vertically against gravity. The 1/4" port and M14x1.5 male rod thread provide robust pneumatic and mechanical connections for heavier tooling.
Airtac MF32-40 Stainless Steel Mini Cylinder MF40X125U Technical Specifications
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF40X125U |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| 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 | Fixed TPU bumper pads |
| 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 MF32-40 Stainless Steel Mini Cylinder MF40X125U
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 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 MF32-40 Stainless Steel Mini Cylinder MF40X125U Is Used
Pallet Divertor
Pushes heavy wood pallets sideways off a high-speed packaging line using the full 628.3 N output at 0.5 MPa.
Stamping Press Feed
Advances a metal strip into a mechanical press with the U flat-end cover absorbing base-impact recoil.
Carton Flap Folder
Folds heavy corrugated cardboard flaps prior to case sealing, benefiting from the compact JIS body length.
Is the Airtac MF32-40 Stainless Steel Mini Cylinder MF40X125U the Right Cylinder?
When sizing this 40 mm bore, stepping down to the MF32 yields 402.2 N of push at 0.5 MPa, whereas the 40 mm bore shown here is the largest available in the MF family with no larger standard option. If your fixture requires position feedback, you must select the -S magnet variant to mount CMSG, DMSG or EMSG sensors, as this specific SKU cannot support them. This model features a U flat-end back cover, and you can adapt it using LB foot, FA flange, SDB pivot or TC trunnion hardware.
Remember that the fixed TPU bumpers only decelerate the stroke end and do not act as a brake. If air pressure drops or the valve is centred, the piston will drift and drop the load; for vertical or suspended loads, install an external pilot-operated check valve or rod lock. At 125 mm of travel, ensure your tooling is guided to prevent side-loading and rod bending.
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 MF32-40 Stainless Steel Mini Cylinder MF40X125U FAQ
This 40 mm bore cylinder uses a 1/4" port and an M14x1.5 male rod thread. The double-acting thrust is 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 internal magnet, so CMSG, DMSG or EMSG switches cannot be used. You would need the -S variant for sensing. The unit relies on fixed TPU bumper pads to decelerate the stroke end, and its JIS-standard round body is shorter than an ISO 6432 cylinder, saving mounting length.
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