Airtac MF32-40 Stainless Steel Mini Cylinder MF40X20SU
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF40X20SU is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm bore and 20mm 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
- Stroke20 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 MF40X20SU
Delivering 628.3 N of push force at 0.5 MPa, the AirTAC MF40X20SU is a robust double-acting JIS-standard round-body mini cylinder built for tight spaces. Its SUS304 stainless steel barrel and riveted aluminium covers shrug off mild corrosion and washdown environments. The integrated piston magnet allows direct mounting of CMSG, DMSG, or EMSG sensors, while the U flat-end back cover provides a flush rear mounting face for cramped enclosures.
For the same 40 mm bore and 20 mm stroke, this JIS body is physically shorter than an ISO 6432 cylinder, saving valuable packaging length. The piston employs a two-way oil-retaining seal that holds a lubricating film for long service life. Fixed TPU bumper pads and a front-cover anti-impact pad soften the stroke-end impact. Plan for roughly 377 N of actual work at 0.5 MPa, which means it can safely lift about 32 kg vertically with a 2:1 safety margin.
Airtac MF32-40 Stainless Steel Mini Cylinder MF40X20SU Technical Specifications
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF40X20SU |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 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 MF40X20SU
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 MF40X20SU Is Used
Short-Stroke Clamping
Ideal for locking heavy cast iron engine blocks during CNC machining, utilising the 628.3 N push force within a very short 20 mm travel.
Carton Flap Folding
Folds thick cardboard flaps on high-speed packaging lines where the compact JIS body length prevents collision with passing product traffic.
Heavy Part Diverting
Pushes dense metal hardware off a conveyor belt, leveraging the 32 kg safe vertical lift equivalent to re-route parts reliably.
Is the Airtac MF32-40 Stainless Steel Mini Cylinder MF40X20SU the Right Cylinder?
Choosing this 40 mm bore yields 628.3 N push and 527.8 N pull at 0.5 MPa. If your fixture requires less force, stepping down to the MF32 provides 402.2 N; since 40 mm is the largest available MF bore, higher loads demand a different cylinder family. The 1/4" port matches the bore size, and the male M14x1.5 rod thread handles heavy loads.
Because the stroke is only 20 mm, side-load risks are minimal, but note that a standard cylinder drifts when air is removed or a valve is centred. The fixed bumpers only decelerate the stroke end and do not act as a brake. To hold a load securely mid-stroke, fit an external rod lock or a pilot-operated check valve.
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 MF40X20SU FAQ
This 40 mm bore cylinder features a 1/4" air port and an M14x1.5 male rod 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. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
Yes, the built-in magnet (-S) supports CMSG, DMSG, and EMSG reed or electronic switches. The U flat-end back cover allows direct rear mounting against flat plates. The fixed TPU bumpers decelerate the piston at stroke ends but do not function as an adjustable air cushion.
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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