Airtac MGD Double Rod Mini Cylinder MGD40X300S
The AirTAC Airtac MGD Double Rod Mini Cylinder MGD40X300S is a genuine double acting, double rod JIS-standard round-body mini air cylinder with a Ø40mm bore and 300mm 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
- Stroke300 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 MGD40X300S
The AirTAC MGD40X300S is a JIS round-body mini cylinder, double acting and double rod: a 16 mm hard-chrome rod exits both the front and rear covers with the same M14x1.5 male thread at each end. Because both chambers see the rod-side piston area, the output force is equal in both directions, about 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. The through-rod resists rotation and side load, keeps stroke-end position repeatable, and lets the rear rod end carry a stop flag or drive a second load. A fixed anti-impact bumper pad softens each stroke end; for an adjustable cushion you would move to the MGCD series.
Construction is a riveted SUS304 stainless barrel with hard-chrome carbon-steel rods and two-way lubricant-storing piston seals, suited to damp and washdown environments. The 40 mm bore runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof tested to 1.5 MPa (215 psi), from -20 to +70 C at 30-800 mm/s, with 1/8" ports and PT thread. The S code means a magnet is fitted, so CMSG, DMSG or EMSG switches can be clamped to the barrel for end-of-stroke sensing. As a computed buyer insight, apply the usual 0.6 working-load rule to the 527.8 N force and you get roughly 32 kg of safe horizontal load, or about 26 kg if hanging a vertical figure.
Airtac MGD Double Rod Mini Cylinder MGD40X300S Technical Specifications
| Model | Airtac MGD Double Rod Mini Cylinder MGD40X300S |
|---|---|
| Series | MGD JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 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 MGD40X300S
| MGD | JIS round-body mini cylinder (double-rod). |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 MGD40X300S Is Used
Anti-rotation linear slide
The through-rod keeps a 300 mm slide from twisting under a 30 kg class load, holding stroke-end position repeatable without external guides.
Twin-load pusher
Drive two fixtures at once, one on each M14x1.5 rod end, with an equal 527.8 N at 0.5 MPa delivered to both sides of the line.
Rear-mounted stop flag
Use the back rod end to carry a switch or stop flag while the front rod does the work, with CMSG, DMSG or EMSG sensing on the fitted magnet.
Is the Airtac MGD Double Rod Mini Cylinder MGD40X300S the Right Cylinder?
At 40 mm bore this is the largest MGD, delivering 527.8 N each way at 0.5 MPa; size down to MGD32 if your load needs less than about 484 N at 0.7 MPa, or step to the MGCD series for bores 50 or 63 or for a variable cushion. If you do not need a rod at both ends, the single-rod MG gives a higher push force in the same JIS footprint. Choose the MGD40X300S when anti-rotation guidance, dual-end loading or a rear-mounted switch flag matters. The 300 mm stroke sits inside the 500 mm maximum standard stroke for this bore, so no nonstandard surcharge applies. Mount with the FA flange or LB foot, add I or Y rod knuckles at either or both rod ends (SDB and CB pivots are not available on the double-rod body), and keep the -S magnet if you plan CMSG, DMSG or EMSG sensing. On long strokes, support the load to limit side load on the exposed through-rod. Note the cylinder does not hold position on air loss; use an external rod lock or pilot check valve for a held load.
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 MGD40X300S FAQ
The 40 mm double-rod bore gives an equal 527.8 N at 0.5 MPa and 738.9 N at 0.7 MPa in both directions, with a theoretical maximum of 107.6 kgf at 1.0 MPa. It is double acting on filtered air at 0.15-1.0 MPa (22-145 psi), proof tested to 1.5 MPa (215 psi), rated -20 to +70 C, speed 30-800 mm/s, with 1/8" ports, a 16 mm rod and a 500 mm maximum standard stroke.
A rod exits both covers, so force is equal both ways and the through-rod resists rotation and side load, while the single-rod MG has one higher push force and no rear rod. The fitted magnet on this -S model accepts CMSG, DMSG or EMSG switches. The bumper pad only softens stroke ends; it is not an adjustable cushion like the MGCD, and the cylinder will not hold a load on air loss.
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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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