Airtac MF32-40 Stainless Steel Mini Cylinder MF40X25SU
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF40X25SU is a genuine double acting 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
- 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 MF40X25SU
Delivering 628.3 N of push force at 0.5 MPa, the AirTAC MF40X25SU is a JIS-standard round-body mini cylinder built for tight machinery layouts. Its SUS304 stainless steel barrel and riveted rolling-packed aluminium covers resist mild corrosion and washdowns, while the piston's two-way seal retains an oil film for long service life. Because this 40 mm bore body is physically shorter than a comparable ISO 6432 cylinder, it saves valuable mounting length in compact fixtures.
This double-acting actuator uses fixed TPU bumper pads and a front-cover anti-impact pad to decelerate the stroke end, and it carries a built-in magnet for CMSG, DMSG or EMSG sensors. With a 25 mm stroke, plan for roughly 377 N of actual work at 0.5 MPa, which means it can safely lift about 32 kg vertically. The 1/4 inch port and M14x1.5 male rod thread handle the high airflow needed for rapid 30-800 mm/s cycling.
Airtac MF32-40 Stainless Steel Mini Cylinder MF40X25SU Technical Specifications
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF40X25SU |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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 MF40X25SU
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 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 MF32-40 Stainless Steel Mini Cylinder MF40X25SU Is Used
Short-Stroke Clamping
Uses the 628.3 N push at 0.5 MPa to secure heavy cast iron engine blocks during CNC machining operations.
Package Diverting
Snaps the 25 mm stroke out rapidly to push heavy cartons off a main logistics belt at high cycling speeds.
Pallet Stops
Halts loaded pallets on a washdown roller line, relying on the SUS304 barrel to endure humid environments.
Is the Airtac MF32-40 Stainless Steel Mini Cylinder MF40X25SU the Right Cylinder?
When sizing this 40 mm bore unit, step down to the MF32 if your job requires only 402.2 N of push force at 0.5 MPa, as no larger MF bore exists for heavier demands. The U flat-end back cover suits direct rear mounting, and the -S magnet allows drop-in position sensing. If your mechanism must maintain vertical position during an air loss or valve centre state, note that the bumper pads only soften impact and will not act as a brake; install an external rod lock or pilot check valve to prevent drift. For this short 25 mm stroke, side-load stress on the 16 mm rod is minimal, keeping guide wear low.
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 MF40X25SU FAQ
At 0.5 MPa this 40 mm bore cylinder pushes 628.3 N and pulls 527.8 N. At 0.7 MPa it pushes 879.6 N and pulls 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa. It uses a 1/4 inch air port.
The fixed TPU bumpers only soften the stroke end and do not lock the piston; you need an external rod lock or pilot check valve to hold a load vertically. Because this SKU includes the -S magnet, it accepts CMSG, DMSG and EMSG switches for position sensing.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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