Airtac MF32-40 Stainless Steel Mini Cylinder MF40X185SU
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF40X185SU is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm bore and 185mm 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
- Stroke185 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 MF40X185SU
Delivering 628.3 N of push force at 0.5 MPa, this double-acting JIS-standard round-body mini cylinder handles heavy-duty positioning in tight spaces. Because the riveted rolling-packed SUS304 stainless barrel and aluminium covers form a shorter body than an ISO 6432 cylinder of the same 40 mm bore and 185 mm stroke, you save valuable mounting length. The construction naturally resists mild corrosion and washdown, while the piston's two-way seal retains an oil film for long service life.
For practical sizing, plan your fixture to move about 377 N of real work at 0.5 MPa, which is roughly 60% of the rated push. This equates to safely lifting a 32 kg part vertically with a 2:1 margin. The stroke end is softened by fixed TPU bumper pads and a front-cover anti-impact pad, which decelerate the piston without offering adjustable cushioning. A built-in magnet (-S) allows tracking via CMSG, DMSG or EMSG switches, and the U flat-end back cover provides a straightforward rear mounting face.
Airtac MF32-40 Stainless Steel Mini Cylinder MF40X185SU Technical Specifications
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF40X185SU |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 185 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 MF40X185SU
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×185 | 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 MF40X185SU Is Used
Pallet Diverting Gate
Swings a heavy diverting arm on a packaging conveyor, using the 628.3 N push force to reliably reroute 30 kg cartons without stalling.
Press Fit Bushings
Pushes bronze bushings into aluminium housings on an assembly line, where the 185 mm stroke provides ample travel for multi-stage insertion.
Vertical Parts Lift
Raises stacked metal trays in a washdown environment, relying on the SUS304 barrel to resist moisture while safely lifting 32 kg loads.
Is the Airtac MF32-40 Stainless Steel Mini Cylinder MF40X185SU the Right Cylinder?
When sizing this 40 mm bore, compare it directly against the smaller MF32, which yields 402.2 N of push at 0.5 MPa; stepping up to this MF40 provides 628.3 N if the smaller bore stalls under load. As 40 mm is the largest available MF diameter, moving beyond it requires a different cylinder family. If your mechanism drops vertically when air is removed or the valve is centred, note that this standard cylinder will drift; the bumpers only soften the end of travel and do not act as a brake. You must add an external rod lock or a pilot-operated check valve to hold a suspended load.
This specific SKU includes the -S magnet for position sensing and features a U flat-end rear cover. The 1/4" port and M14x1.5 male rod thread are fixed by the bore. At a 185 mm stroke, ensure your guiding structure prevents side-load rod bending, and select LB foot, FA flange, SDB pivot, or TC trunnion mounts to suit the frame.
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 MF40X185SU FAQ
The 40 mm bore operates on a 1/4" port. 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.
No, the base MF uses fixed TPU bumper pads to decelerate the stroke end, not an adjustable air cushion; for adjustable cushioning look at the MFC variant. It is a JIS-standard round-body cylinder that is physically shorter than an ISO 6432 cylinder for the same bore and stroke, but it does not conform to the ISO 6432 standard.
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