Airtac MF32-40 Stainless Steel Mini Cylinder MF40X15SU
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF40X15SU is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm bore and 15mm 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
- Stroke15 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 MF40X15SU
Delivering 628.3 N of push force at 0.5 MPa, the AirTAC MF40X15SU is a double-acting JIS-standard round-body mini cylinder built for high-impact clamping in confined spaces. Its 15 mm stroke and flat-end U back cover keep the installed footprint exceptionally tight. Because the MF body is shorter than a comparable ISO 6432 cylinder for the same bore and stroke, it drops directly into denser machinery layouts without forcing a redesign. The SUS304 stainless-steel barrel and riveted rolling-packed aluminium covers shrug off mild washdown and corrosion, while the two-way piston seal retains an oil film for long service life.
The 40 mm bore uses a 1/4" port and a 16 mm rod with an M14x1.5 male thread. Fixed TPU bumper pads and a front-cover anti-impact pad soften the end-of-stroke impact, though they decelerate rather than provide adjustable cushioning. For practical actuation at 0.5 MPa, plan for roughly 377 N of real work, which translates to lifting about 32 kg vertically with a 2:1 safety margin. This SKU includes a piston magnet for position sensing.
Airtac MF32-40 Stainless Steel Mini Cylinder MF40X15SU Technical Specifications
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF40X15SU |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 15 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 MF40X15SU
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×15 | 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 MF40X15SU Is Used
Stamping Pin Ejection
Uses the 628.3 N push force to knock small stamped metal pins out of a die quickly, where the 15 mm stroke limits overtravel and the U flat-end cover mounts flush to the die plate.
Short-Stroke Part Clamping
Secures dense aluminium blocks for machining, relying on the SUS304 stainless barrel to resist cutting fluid splash while the internal magnet triggers a DMSG sensor to confirm the clamp.
Package Flap Folding
Folds cardboard carton flaps on a packaging line, where the compact JIS body saves mounting length and the TPU bumper pads quietly absorb the 15 mm stroke impact.
Is the Airtac MF32-40 Stainless Steel Mini Cylinder MF40X15SU 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 this MF40 provides 628.3 N; since 40 mm is the largest available MF bore, moving beyond 628.3 N requires a different cylinder family. The flat-end U back cover suits flush mounting against hard stops, and you can pair the body with LB foot, FA flange, SDB pivot, or TC trunnion brackets. Because this SKU carries the -S suffix, its internal magnet supports CMSG, DMSG, and EMSG reed or electronic switches for precise end-position detection.
If your process drops air pressure or centres the valve, the piston will drift—fixed bumpers only soften the stroke end and do not function as a braking lock. To suspend a load safely during an air loss event, install an external rod lock or a pilot-operated check valve. Furthermore, on this very short 15 mm stroke, keep the load guided to prevent rod side-loading and premature seal wear.
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 MF40X15SU FAQ
The 40 mm bore uses a 1/4" air port and a 16 mm rod with an M14x1.5 male thread. At 0.5 MPa it 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.
The MF body is JIS-standard and is physically shorter than an ISO 6432 cylinder for the same bore and stroke, but it does not conform to ISO 6432. It uses fixed TPU bumper pads for deceleration rather than an adjustable air cushion. However, because this SKU includes the -S magnet, it fully supports 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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