Airtac MF32-40 Stainless Steel Mini Cylinder MF40X40U
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF40X40U is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm bore and 40mm 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
- Stroke40 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 MF40X40U
Delivering 628.3 N of push force at 0.5 MPa, this double-acting JIS-standard round-body mini cylinder handles heavy-duty actuation within a compact footprint. Because the SUS304 stainless steel barrel and riveted aluminium covers yield a shorter overall body than an ISO 6432 cylinder of the same bore and stroke, it fits neatly into tighter machine frames. The internal two-way seal retains an oil film for long service life, while fixed TPU bumper pads soften the stroke-end impact without offering adjustable cushioning.
For practical sizing, plan your mechanism around a working load of roughly 377 N, which accounts for friction and real-world dynamics at 0.5 MPa. This translates to lifting a part weighing about 32 kg vertically with a safe 2:1 margin. The U flat-end rear cover provides a flush mounting surface, and the 1/4" port accommodates high airflow. Note that this specific SKU lacks a magnet, so it cannot support CMSG, DMSG, or EMSG position switches without upgrading to the -S variant.
Airtac MF32-40 Stainless Steel Mini Cylinder MF40X40U Technical Specifications
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF40X40U |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 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 MF40X40U
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 MF40X40U Is Used
Pallet Diverting Gate
Uses the 628.3 N push force to reliably pivot heavy timber pallets onto a secondary packaging line at high cycling speeds.
Stamping Press Feed
Pushes metal blanks into a forming die, where the compact JIS body length saves valuable space in the press enclosure.
Carton Flap Folder
Deploys the 40 mm stroke to fold heavy cardboard flaps prior to taping, relying on the flush U rear cover for tight wall mounting.
Is the Airtac MF32-40 Stainless Steel Mini Cylinder MF40X40U the Right Cylinder?
When sizing this 40 mm bore actuator, compare its 628.3 N push force at 0.5 MPa against the smaller MF32, which provides 402.2 N under the same pressure. If your application requires even more power, the MF40 is the largest available bore in this series, meaning a larger external cylinder would be required for heavier loads. Keep in mind that a standard double-acting cylinder drifts when air pressure is lost or the valve is centred; the TPU bumpers only decelerate the stroke end and will not act as a brake. To maintain vertical position holding, integrate an external rod lock or a pilot-operated check valve into your pneumatic circuit.
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 MF40X40U FAQ
At 0.5 MPa it provides 628.3 N push and 527.8 N pull. At 0.7 MPa it provides 879.6 N push and 738.9 N pull. The theoretical maximum force is 128.1 kgf at 1.0 MPa. The air port size is 1/4".
No, this specific SKU does not include a piston magnet, so it cannot accept CMSG, DMSG, or EMSG switches. You would need the -S variant for position sensing. The cylinder features a SUS304 stainless steel barrel and fixed TPU bumper pads rather than an adjustable air cushion.
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