Airtac MGD Double Rod Mini Cylinder MGD40X300
The AirTAC Airtac MGD Double Rod Mini Cylinder MGD40X300 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 MGD40X300
The AirTAC MGD40X300 is a double acting, double rod JIS mini cylinder with a 40 mm bore and 300 mm stroke: a 16 mm rod exits both the front and rear covers with an M14x1.5 male thread at each end, so the two rod ends travel together. Because the rod-side piston area is active in both directions, the output force is equal either way, about 527.8 N at 0.5 MPa and 738.9 N at 0.7 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. Air supply is 0.15-1.0 MPa (22-145 psi) with a 1.5 MPa (215 psi) proof rating, and ports are 1/8" on this bore.
Construction follows the JIS round-body mini format: a SUS304 stainless barrel with a hard-chrome plated rod, riveted covers, and a two-way lubricant-storing piston seal, suited to damp and washdown environments. A fixed anti-impact bumper pad decelerates the stroke end; it is not an adjustable cushion. Operating temperature is -20 to +70 C and speed range is 30-800 mm/s. The standard MGD bore 40 stroke list runs to 500 mm, so the 300 mm stroke is a standard length. As a sizing guide, the 527.8 N push at 0.5 MPa corresponds to roughly 53 kgf, so plan on about 32 kg as a realistic working load, or around 26 kg if the cylinder lifts a vertical figure.
Airtac MGD Double Rod Mini Cylinder MGD40X300 Technical Specifications
| Model | Airtac MGD Double Rod Mini Cylinder MGD40X300 |
|---|---|
| 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 MGD40X300
| 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 MGD40X300 Is Used
Anti-rotation slide
The through-rod of the MGD40X300 resists rotation while pushing or pulling a 300 mm stroke slide with about 527.8 N each way at 0.5 MPa, keeping the stroke-end position repeatable without external guides.
Twin-load push
With a rod exiting both covers, the front end drives the workpiece while the rear M14x1.5 thread carries a second tool or pusher, both moving together with equal 738.9 N force at 0.7 MPa.
Rear-mounted stop flag
Fit a stop or position flag to the back rod end of this 40 mm bore cylinder to signal stroke-end on a transfer station; add the S magnet code if switching with CMSG, DMSG or EMSG sensors is required.
Is the Airtac MGD Double Rod Mini Cylinder MGD40X300 the Right Cylinder?
The MGD40X300 is the largest MGD bore at 40 mm, delivering 527.8 N each way at 0.5 MPa. If you need more force, more bore options, or an adjustable cushion, step up to the MGCD series (which adds 50 mm and 63 mm bores); if you do not need a through-rod, the single-rod MG series gives a higher push force in the same bore. Choose the MGD when anti-rotation guidance, equal force in both directions, or a rear rod end for a switch flag or second load matters. Mounting is FA flange or LB foot, with I and Y rod knuckles available; there is no SDB/CB pivot option on the double-rod design. Add the S code to the ordering code if you want the magnet needed for CMSG, DMSG or EMSG switches; this non-S model cannot accept a sensor. At 300 mm stroke, keep side load on the rod low and support the work if guidance is poor.
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 MGD40X300 FAQ
As a double rod cylinder, force is equal in both directions: 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 is 1.5 MPa (215 psi), temperature range is -20 to +70 C, speed is 30-800 mm/s, and the fluid is air filtered to 40 um. The port is 1/8" and the rod thread is M14x1.5 at both ends.
The MGD40X300 has a rod exiting both covers, so force is equal both ways and the through-rod resists rotation and side load; the single-rod MG has a larger push than pull and no rear rod end. The bumper pad only softens stroke ends and does not hold the load on air loss, so use an external rod lock or pilot check valve for held loads. This non-S model has no magnet, so no sensor can be fitted; order the S version to enable CMSG, DMSG or EMSG switches.
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Covers non-human-caused product damage.
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