Airtac MF32-40 Stainless Steel Mini Cylinder MF40X350U
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF40X350U is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm bore and 350mm 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
- Stroke350 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 MF40X350U
Delivering 628.3 N of push force at 0.5 MPa, this 40 mm bore double-acting JIS-standard round-body cylinder is built for demanding fixture work. It features a SUS304 stainless-steel barrel with aluminium covers joined by a riveted rolling-packed structure, resisting mild corrosion and washdown. The piston uses a two-way oil-retaining seal for long life, while fixed TPU bumper pads and a front-cover anti-impact pad soften stroke-end impact.
For the same 40 mm bore and 350 mm stroke, the MF body is physically shorter than an ISO 6432 cylinder, saving valuable mounting length in tight machinery. 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. This specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG position switches. Air connects via a 1/4" port.
Airtac MF32-40 Stainless Steel Mini Cylinder MF40X350U Technical Specifications
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF40X350U |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 350 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 MF40X350U
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×350 | 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 MF40X350U Is Used
Injection Mould Ejection
Uses the 628.3 N push force at 0.5 MPa to knock finished plastic parts out of moulds, where the short JIS body keeps the press footprint compact.
Package Diverting
Extends 350 mm to push heavy cartons off a main conveyor belt, relying on the fixed TPU bumper pads to absorb the impact of rapid cycling.
Pallet Lift Gates
Raises and lowers palletising access gates, safely lifting components under 32 kg with a 2:1 margin while the SUS304 barrel withstands dusty environments.
Is the Airtac MF32-40 Stainless Steel Mini Cylinder MF40X350U the Right Cylinder?
If 402.2 N at 0.5 MPa from the MF32 is insufficient for your cycle, this 40 mm bore provides the necessary step up in thrust. Since 40 mm is the largest standard MF bore, moving beyond 628.3 N requires a different cylinder family. The 350 mm stroke is well within the 500 mm standard limit, but at this length you must carefully manage side loads to prevent rod bending and premature seal wear.
The U flat-end back cover suits direct rear mounting. Because this is a non-magnetised SKU, you cannot fit reed or solid-state sensors; choose an -S variant if you need end-of-stroke signalling. A plain double-acting cylinder drifts when air is lost or the valve centres, so fit an external rod lock or pilot check valve if the load must be held.
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 MF40X350U FAQ
This 40 mm bore double-acting cylinder has 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.
No, this specific SKU lacks the internal magnet, so CMSG, DMSG, or EMSG switches cannot be fitted; you need an -S variant for sensing. Mechanically, the JIS-standard riveted round-body is shorter than an ISO 6432 cylinder for the same 40x350 dimensions, saving mounting length without using a tie-rod construction.
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