Airtac MFD Double Rod Miniature Cylinder MFD40X50S
The AirTAC Airtac MFD Double Rod Miniature Cylinder MFD40X50S is a genuine double acting, double rod JIS-standard round-body mini air cylinder with a Ø40mm bore and 50mm 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
- Stroke50 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 MFD40X50S
Twin rods exiting both covers give the AirTAC MFD40X50S equal thrust in extend and retract, delivering 527.8 N at 0.5 MPa and 738.9 N at 0.7 MPa each way. This JIS-standard round-body mini cylinder uses a SUS304 stainless barrel with riveted aluminium covers, offering a shorter mounting length than an ISO 6432 unit of the same bore and stroke. The -S suffix means a piston magnet is built in for CMSG, DMSG or EMSG sensors.
With a 40 mm bore, 50 mm stroke and 1/4" port, this double-acting actuator runs at 30-800 mm/s. The second rod steadies the load against side-play and serves as a back-rod mount for a stopper or second tool. It yields a safe working load of about 317 N (60% of the 0.5 MPa force) or a 26.9 kg vertical lift with a 2:1 margin. Fixed TPU bumper pads decelerate the stroke ends.
Airtac MFD Double Rod Miniature Cylinder MFD40X50S Technical Specifications
| Model | Airtac MFD Double Rod Miniature Cylinder MFD40X50S |
|---|---|
| Series | MFD JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 50 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 MFD40X50S
| MFD | JIS-standard round-body mini cylinder (double-rod). |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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 MFD40X50S Is Used
Anti-Rotation Slides
The twin 16 mm rods resist twist while moving 317 N payloads horizontally, keeping the tool plate steady without external guides.
Twin-Tool Actuation
Mount a secondary gripper or stopper on the exiting back rod to operate a second station simultaneously with equal 527.8 N thrust.
Vertical Lift Stations
Lift up to 26.9 kg safely with a 2:1 margin, relying on the equal rod-side force to lower the load smoothly at up to 800 mm/s.
Is the Airtac MFD Double Rod Miniature Cylinder MFD40X50S the Right Cylinder?
Choose the MFD40X50S when you need 527.8 N of force both ways and strong anti-rotation guidance. Stepping down to the MFD32 drops the 0.5 MPa output to 345.6 N, while this 40 mm bore hits 738.9 N at 0.7 MPa. The twin rods prevent twisting on slides and let you mount a second tool on the back rod.
Mounting uses LB foot, FA flange or TC trunnion brackets; there is no SDB or back-cover code because a rod exits both ends. The built-in -S magnet supports CMSG, DMSG and EMSG switches. Note that the cylinder drifts on air loss—the TPU bumpers only decelerate the stroke end, so add an external rod lock or pilot check valve to hold a suspended load.
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 MFD40X50S FAQ
It generates 527.8 N at 0.5 MPa and 738.9 N at 0.7 MPa equally in both directions, with a theoretical max of 107.6 kgf at 1.0 MPa. The air port is 1/4" and the male rod thread is M14x1.5.
The twin rods provide equal force both ways, resist load rotation, and offer a back rod for mounting extra tooling. The -S suffix means it has a built-in magnet for CMSG, DMSG or EMSG sensors.
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