Airtac MFD Double Rod Miniature Cylinder MFD40X300
The AirTAC Airtac MFD Double Rod Miniature Cylinder MFD40X300 is a genuine double acting, double rod JIS-standard round-body mini air cylinder with a Ø40mm bore and 300mm 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
- Stroke300 mm
- Port size1/4"
- Acting typeDouble acting, double rod
- Rod threadM14×1.5
- CushionFixed TPU bumper pads
About the Airtac MFD Double Rod Miniature Cylinder MFD40X300
Delivering 527.8 N of equal thrust in both directions at 0.5 MPa, the AirTAC MFD40X300 is a JIS-standard round-body mini cylinder built for demanding 300 mm strokes. Its double-rod construction means a piston rod exits both aluminium covers, yielding identical push and pull forces via the rod-side area while resisting rotation. The SUS304 stainless steel barrel handles mild corrosion and washdown environments, and the riveted rolling-packed body is deliberately shorter than an ISO 6432 cylinder of the same bore and stroke, saving valuable mounting length.
This non-magnet SKU uses fixed TPU bumper pads to decelerate the stroke end and cannot accept a magnetic sensor. It provides a safe working load of about 317 N, or roughly 26.9 kg of vertical lift with a 2:1 margin. Air connects via a 1/4" port, and the twin rods not only steady the load but provide a ready mount point on the back rod for stoppers or secondary tooling.
Airtac MFD Double Rod Miniature Cylinder MFD40X300 Technical Specifications
| Model | Airtac MFD Double Rod Miniature Cylinder MFD40X300 |
|---|---|
| Series | MFD JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 mm |
| Acting type | Double acting, double rod |
| 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 300 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 | Force (both ways) |
|---|---|
| 0.5 MPa | 528 N |
| 0.7 MPa | 739 N |
| Max (@1.0 MPa) | 108 kgf |
Double-rod: a rod exits both covers, so output force is equal in both directions (rod-side area used).
Model Code: Airtac MFD Double Rod Miniature Cylinder MFD40X300
| MFD | JIS-standard round-body mini cylinder (double-rod). |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 MFD Double Rod Miniature Cylinder MFD40X300 Is Used
Heavy Vertical Lift
Lifts roughly 26.9 kg loads through 300 mm with a 2:1 safety margin, using equal 527.8 N thrust both ways to ensure smooth descent without rotation.
Twin-Tool Transfer
Mounts a gripper on the front rod and a stopper flag on the back rod, using the anti-rotation properties to keep heavy tooling perfectly aligned.
Washdown Actuation
The SUS304 stainless barrel withstands mild washdowns while providing 738.9 N of force at 0.7 MPa for clamping parts in food or chemical processing.
Is the Airtac MFD Double Rod Miniature Cylinder MFD40X300 the Right Cylinder?
When sizing a double-rod mini cylinder, compare the real thrust: this MFD40 bore yields 527.8 N at 0.5 MPa, whereas the smaller MFD32 provides 345.6 N. Choose the 40 mm bore when your application requires moving heavier loads or overcoming significant friction over the full 300 mm stroke. The twin-rod design is ideal when you need strict anti-rotation guidance or want to mount a second tool and a switch flag on the rear rod.
Note that this specific SKU lacks a magnet and cannot support CMSG, DMSG, or EMSG sensors; you must select the -S variant for position sensing. Furthermore, the fixed TPU bumpers only decelerate the stroke end and do not act as a brake. If your system needs to hold a load vertically during air loss, install an external rod lock or pilot-operated check valve. Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover code applies here).
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 MFD Double Rod Miniature Cylinder MFD40X300 FAQ
The MFD40X300 features a 1/4" air port and delivers equal force in both directions because it uses the rod-side area on both strokes. It outputs 527.8 N at 0.5 MPa, 738.9 N at 0.7 MPa, and has a theoretical maximum of 107.6 kgf at 1.0 MPa.
No, this specific SKU does not include a magnet and cannot accept CMSG, DMSG, or EMSG switches. You must order the -S variant for sensing capabilities. The twin rods provide excellent anti-rotation and equal force both ways, but the fixed TPU bumpers only decelerate the stroke end and will not hold a load on air loss.
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