Airtac MFD Double Rod Miniature Cylinder MFD40X25S
The AirTAC Airtac MFD Double Rod Miniature Cylinder MFD40X25S is a genuine double acting, double rod JIS-standard round-body mini air cylinder with a Ø40mm bore and 25mm 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
- Stroke25 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 MFD40X25S
Twin rods exiting both covers define the AirTAC MFD40X25S, a JIS-standard round-body stainless mini cylinder delivering equal force in both directions. Because the piston uses the rod-side area on each face, you get 527.8 N at 0.5 MPa and 738.9 N at 0.7 MPa on both the extend and retract strokes. The SUS304 stainless barrel shrinks mounting length compared to an ISO 6432 unit while resisting mild washdown corrosion.
The built-in -S magnet enables CMSG, DMSG or EMSG switches for position sensing. With a 1/4" port and M14x1.5 male rod threads, this 40 mm bore build yields a safe working load near 317 N, lifting roughly 26.9 kg vertically with a 2:1 margin. Fixed TPU bumper pads decelerate the 25 mm stroke ends without acting as a lock.
Airtac MFD Double Rod Miniature Cylinder MFD40X25S Technical Specifications
| Model | Airtac MFD Double Rod Miniature Cylinder MFD40X25S |
|---|---|
| Series | MFD JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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 MFD40X25S
| MFD | JIS-standard round-body mini cylinder (double-rod). |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 MFD40X25S Is Used
Anti-Rotation Slides
The dual 16 mm rods resist twist during short 25 mm shifts, keeping precision slides aligned under the 527.8 N bidirectional thrust.
Twin-Tool Actuation
Mount a secondary gripper or stopper on the rear rod to operate a second station simultaneously without adding a separate cylinder.
Position Verification
The -S magnet pairs with CMSG or DMSG switches to confirm stroke ends on packaging lines, ensuring the 40 mm piston reached its target.
Is the Airtac MFD Double Rod Miniature Cylinder MFD40X25S the Right Cylinder?
When sizing a double-rod unit, compare this 40 mm bore against the MFD32, which provides 345.6 N at 0.5 MPa. The MFD40X25S steps up to 527.8 N both ways, making it the better choice when your load needs that extra thrust or you want a steadier guide. The second rod resists rotation and lets you mount a second tool or stopper on the back end.
Mounting options include LB foot, FA flange and TC trunnion brackets, with no SDB or back-cover code available since a rod exits both ends. The included -S magnet supports reed and electronic sensors. Remember that fixed TPU bumpers only decelerate the stroke end; to hold a load on air loss, install an external rod lock or pilot 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 MFD Double Rod Miniature Cylinder MFD40X25S FAQ
It delivers equal force both ways: 527.8 N at 0.5 MPa, 738.9 N at 0.7 MPa, and a theoretical maximum of 107.6 kgf at 1.0 MPa. The 1/4" port supplies air to both rod-side chambers.
The twin rods provide equal thrust in both directions and resist rotation for steadier guiding. The -S magnet enables CMSG, DMSG and EMSG switches for position sensing, while fixed TPU bumpers decelerate the stroke ends.
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