Airtac MGD Double Rod Mini Cylinder MGD40X250
The AirTAC Airtac MGD Double Rod Mini Cylinder MGD40X250 is a genuine double acting, double rod JIS-standard round-body mini air cylinder with a Ø40mm bore and 250mm stroke, 1/8" air ports and a SUS304 stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ40 mm
- Stroke250 mm
- Port size1/8"
- Acting typeDouble acting, double rod
- Rod threadM14×1.5
- CushionFixed anti-impact 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 MGD Double Rod Mini Cylinder MGD40X250
The AirTAC MGD40X250 is a JIS-standard round-body mini cylinder, double acting, with a through rod that exits both the front and back covers. Because the 16 mm rod occupies the piston area on each side, the cylinder delivers the same 527.8 N at 0.5 MPa (738.9 N at 0.7 MPa) whether it extends or retracts, so the two rod ends move in unison and stroke-end position stays repeatable. The back rod end can carry a switch flag, a stop, or drive a second load, while the through-rod design resists rotation and side load better than a single-rod cylinder of the same bore.
Construction is a riveted SUS304 stainless barrel with hard-chrome plated carbon steel rods, suited to damp and washdown environments, and a fixed anti-impact bumper pad softens each stroke end. Operating range is 0.15-1.0 MPa (22-145 psi) with proof pressure of 1.5 MPa (215 psi), temperature -20 to +70 C, and speed 30-800 mm/s. Every port is 1/8" and the male rod thread is M14x1.5 at both ends. As a practical sizing check, the 527.8 N output at 0.5 MPa supports roughly 32 kg of vertical load at a conservative 0.6 duty factor, or about 27 kg if halved for a vertical lift.
Airtac MGD Double Rod Mini Cylinder MGD40X250 Technical Specifications
| Model | Airtac MGD Double Rod Mini Cylinder MGD40X250 |
|---|---|
| Series | MGD JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 mm |
| Acting type | Double acting, double rod |
| Port size | 1/8" |
| 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 anti-impact bumper pads |
| Max standard stroke | Up to 500 mm |
Specifications follow the official AirTAC MG-series (JIS standard) datasheet. Barrel: SUS304 stainless steel (round-body, riveted construction); piston rod: carbon steel with 20µm hard-chrome plating. 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 MGD Double Rod Mini Cylinder MGD40X250
| MGD | JIS round-body mini cylinder (double-rod). |
|---|---|
| 40 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
| FA / LB | Mounting: FA flange, LB foot. |
MG-family variants: MG / MGC (double acting ±cushion), MSG / MTG (single acting push / pull), MGD / MGCD (double rod ±cushion). Accessories: LB foot, FA flange, plus I and Y knuckles. Thread PT (blank) / G / NPT.
Where the Airtac MGD Double Rod Mini Cylinder MGD40X250 Is Used
Anti-rotation linear slide
The through rod resists rotation and side load, keeping a 250 mm travel slide on a 40 mm bore tracking straight at up to 527.8 N of working force in both directions.
Twin-load push
Drive two small fixtures or eject two parts at once: the front and rear M14x1.5 rod ends move together, each delivering the same 527.8 N at 0.5 MPa.
Rear stop or flag mounting
Use the back rod end to carry a stop block or position flag on packaging and assembly tooling, with the fixed bumper pad decelerating each stroke end.
Is the Airtac MGD Double Rod Mini Cylinder MGD40X250 the Right Cylinder?
At 40 mm bore the MGD40X250 is the largest cylinder in the MGD range, delivering 527.8 N each way at 0.5 MPa. If you need more force or a larger bore such as 50 or 63 mm, or if you need an adjustable air cushion instead of the fixed bumper pad, step up to the MGCD double-rod series; if a single rod is sufficient, the MG series is the simpler choice. The through-rod format suits anti-rotation slides, twin-load pushing, and rear-mounted switch or stop flags. Mounting is FA flange or LB foot, with I and Y rod knuckles available (no SDB or CB pivot mounts on the double-rod). The optional S code adds a magnet for CMSG, DMSG or EMSG switches; this non-S model cannot accept a sensor. At 250 mm the stroke is well within the 500 mm standard maximum for this bore, but keep side load on the rod low on long strokes to protect the bearings.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting (LB / FA) & knuckle
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 On first run, back off the cushion/impact settings and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MGD Double Rod Mini Cylinder MGD40X250 FAQ
Because the rod-side area is active both ways, output is equal in extend and retract: 527.8 N at 0.5 MPa and 738.9 N at 0.7 MPa, with a theoretical maximum of 107.6 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), temperature -20 to +70 C, speed 30-800 mm/s, and the fluid is air filtered to 40 um. Ports are 1/8" on this bore.
The MGD40X250 has a rod exiting both covers with the same M14x1.5 male thread at each end, so force is identical in both directions and the back end can carry a stop, flag or second load; the single-rod MG has a higher extend force but no rear rod. The fixed bumper pad only softens the stroke ends and will not hold a load on air loss, so use an external rod lock or pilot check valve for held loads. Order the S code variant to fit CMSG, DMSG or EMSG switches; without the magnet no sensor can be mounted.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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