Airtac MFD Double Rod Miniature Cylinder MFD20X125S
The AirTAC Airtac MFD Double Rod Miniature Cylinder MFD20X125S is a genuine double acting, double rod JIS-standard round-body mini air cylinder with a Ø20mm bore and 125mm stroke, 1/8" 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.
- BoreØ20 mm
- Stroke125 mm
- Port size1/8"
- Acting typeDouble acting, double rod
- Rod threadM8×1.25
- 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 MFD Double Rod Miniature Cylinder MFD20X125S
Delivering 131.9 N of thrust in both directions at 0.5 MPa, the AirTAC MFD20X125S is a JIS-standard round-body mini cylinder built for equal-force, double-rod actuation. The 20 mm bore features an 8 mm rod exiting both covers, yielding a theoretical maximum of 26.9 kgf at 1.0 MPa. Its riveted rolling-packed construction pairs a SUS304 stainless steel barrel with aluminium covers, offering reliable resistance to mild corrosion and washdown environments.
Because the piston uses the same rod-side area on each end, output force remains identical on extension and retraction. The twin rods inherently steady the load and resist rotation, while the protruding back rod provides a ready mount for a second tool, a stopper, or a switching flag. This -S SKU includes a built-in piston magnet for CMSG, DMSG, or EMSG sensors, and uses a 1/8" port. For a safe working load, expect around 79 N (60% of the 0.5 MPa rating), or roughly 6.7 kg of vertical lift with a 2:1 margin.
Airtac MFD Double Rod Miniature Cylinder MFD20X125S Technical Specifications
| Model | Airtac MFD Double Rod Miniature Cylinder MFD20X125S |
|---|---|
| Series | MFD JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 125 mm |
| Acting type | Double acting, double rod |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 (Ø20mm)
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 132 N |
| 0.7 MPa | 185 N |
| Max (@1.0 MPa) | 27 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 MFD20X125S
| MFD | JIS-standard round-body mini cylinder (double-rod). |
|---|---|
| 20 | Bore size in mm. |
| ×125 | 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 MFD20X125S Is Used
Anti-Rotation Slides
Twin 8 mm rods steady the load and prevent twist over the 125 mm stroke, ideal for moving a 79 N payload without side-play.
Twin-Tool Actuation
Mount a second gripper or stopper on the rear rod to perform a secondary task, utilising the equal 131.9 N force in both directions.
Back-Rod Switch Flag
The protruding back rod provides a convenient mounting point for a physical flag, tracked by the built-in magnet and CMSG/DMSG sensors.
Is the Airtac MFD Double Rod Miniature Cylinder MFD20X125S the Right Cylinder?
When choosing between the two available bores, the MFD20 provides 131.9 N at 0.5 MPa, whereas stepping up to the MFD25 yields 206.1 N both ways. Select the 20 mm bore for lighter guiding and twin-tool tasks, ensuring your payload stays under the 79 N safe working load threshold. The 125 mm stroke operates at speeds from 30 to 800 mm/s, decelerated at the ends by fixed TPU bumper pads rather than an adjustable air cushion.
The double-rod layout means there is no back cover and no SDB mount option; use LB foot, FA flange, or TC trunnion brackets. This MFD20X125S variant includes the -S magnet for position sensing. Remember that a standard cylinder drifts on air loss—the bumpers only decelerate the stroke end and do not lock the load, so add an external rod lock or pilot check valve if you need to hold position vertically.
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 MFD20X125S FAQ
The 20 mm bore double-rod design provides equal force both ways: 131.9 N at 0.5 MPa, 184.7 N at 0.7 MPa, and a theoretical maximum of 26.9 kgf at 1.0 MPa. It uses a 1/8" port.
Yes, the twin 8 mm rods resist rotation and steady the load. This -S SKU includes a magnet for CMSG, DMSG, or EMSG switches. The rear rod also allows mounting a second tool or flag.
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