Airtac MFD Double Rod Miniature Cylinder MFD40X40
The AirTAC Airtac MFD Double Rod Miniature Cylinder MFD40X40 is a genuine double acting, double rod JIS-standard round-body mini air cylinder with a Ø40mm bore and 40mm 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
- Stroke40 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 MFD40X40
Twin rods exiting both covers give the AirTAC MFD40X40 equal 527.8 N force in both directions at 0.5 MPa, making it a JIS-standard round-body stainless mini cylinder that resists rotation. The SUS304 barrel and riveted aluminium covers shed mild corrosion, while the 40 mm bore uses a 1/4" port and M14x1.5 male rod threads.
This double-acting build provides a theoretical maximum of 107.6 kgf at 1.0 MPa. It runs at 30-800 mm/s and relies on fixed TPU bumper pads to decelerate the stroke end. Because this specific SKU lacks the -S magnet option, it cannot accept CMSG, DMSG, or EMSG sensors. For a safe working load, expect about 317 N, or a 26.9 kg vertical lift with a 2:1 margin.
Airtac MFD Double Rod Miniature Cylinder MFD40X40 Technical Specifications
| Model | Airtac MFD Double Rod Miniature Cylinder MFD40X40 |
|---|---|
| Series | MFD JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 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 MFD40X40
| MFD | JIS-standard round-body mini cylinder (double-rod). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 MFD40X40 Is Used
Twin-Tool Actuation
Drive a primary gripper on the front rod and a secondary ejector on the back, utilizing the 527.8 N equal force for synchronized part handling.
Anti-Rotation Slides
The dual 16 mm rods resist side-play and twisting, keeping a 26.9 kg vertical load steady without needing an external linear guide.
Back-Rod Switching
Use the rear rod extension to trip a mechanical limit valve, leveraging the compact JIS body that is shorter than an ISO 6432 cylinder of the same stroke.
Is the Airtac MFD Double Rod Miniature Cylinder MFD40X40 the Right Cylinder?
When sizing this 40 mm bore against the smaller MFD32, the MFD40X40 delivers 527.8 N at 0.5 MPa versus 345.6 N for the 32 mm version. Choose this larger bore when your application demands higher equal-force output both ways. The twin rods are ideal for anti-rotation slides or mounting a second tool on the back rod.
Remember that the fixed TPU bumpers only decelerate the stroke; they do not lock the piston. If air pressure drops, the cylinder drifts, so add an external rod lock or pilot check valve for holding. Mounting options include LB foot, FA flange, and TC trunnion, but there is no SDB or back-cover code because a rod exits both ends. This base SKU has no magnet and cannot take a sensor.
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 MFD40X40 FAQ
The MFD40X40 delivers equal force in both directions because it is a double-rod cylinder. It provides 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 air port size is 1/4".
The twin rods resist rotation and provide steadier guidance than a single-rod mini. However, it does not hold position on air loss; the piston drifts. For load holding, use an external rod lock. Also, this SKU lacks a magnet, so it cannot take sensors.
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