Airtac MGD Double Rod Mini Cylinder MGD20X300
The AirTAC Airtac MGD Double Rod Mini Cylinder MGD20X300 is a genuine double acting, double rod JIS-standard round-body mini air cylinder with a Ø20mm 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.
- BoreØ20 mm
- Stroke300 mm
- Port size1/8"
- Acting typeDouble acting, double rod
- Rod threadM8×1.25
- 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 MGD20X300
The AirTAC MGD20X300 is a JIS-standard round-body mini cylinder, double acting, with a true double rod: an 8 mm rod exits both the front and back covers with the same M8x1.25 male thread at each end. Because the rod-side area is what the air works on in both directions, the output force is equal either way, about 131.9 N at 0.5 MPa and 184.7 N at 0.7 MPa, with a theoretical maximum of 26.9 kgf at 1.0 MPa. The through-rod resists piston rotation and side load, and the free back rod end can carry a stop or switch flag or drive a second load while the front end does the work.
At the 300 mm maximum standard stroke for this bore, the long through-rod keeps stroke-end position repeatable and stays straight under modest side load. The SUS304 stainless barrel and hard-chrome-plated rods suit damp and washdown environments, the riveted round-body construction keeps the JIS footprint compact, and fixed anti-impact bumper pads decelerate the piston at each end of travel. Operating range is 0.15-1.0 MPa (22-145 psi) with a 1.5 MPa (215 psi) proof pressure, and speed runs 30-800 mm/s. A practical working load is about 8 kg horizontal (roughly 0.6 of the 131.9 N force) or about 6 kg vertical, and the cylinder will not hold position on air loss, so use an external rod lock or pilot check valve for a held load.
Airtac MGD Double Rod Mini Cylinder MGD20X300 Technical Specifications
| Model | Airtac MGD Double Rod Mini Cylinder MGD20X300 |
|---|---|
| Series | MGD JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 300 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 anti-impact bumper pads |
| Max standard stroke | Up to 300 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 (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 MGD Double Rod Mini Cylinder MGD20X300
| MGD | JIS round-body mini cylinder (double-rod). |
|---|---|
| 20 | 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 MGD20X300 Is Used
Anti-rotation slide
The through-rod keeps the tool plate from twisting on a 300 mm transfer stroke, with 131.9 N available in each direction for symmetric push-pull indexing.
Twin-load push
Drive two small fixtures or clamps at once, one off each M8x1.25 rod end, with equal 131.9 N force per side at 0.5 MPa.
Rear flag station
Use the back rod end to carry a stop or flag block while the front end does the work, keeping stroke-end position repeatable at up to 800 mm/s.
Is the Airtac MGD Double Rod Mini Cylinder MGD20X300 the Right Cylinder?
At 20 mm bore this is the smallest MGD, delivering 131.9 N each way at 0.5 MPa, so size up to the 25 mm (206.1 N) or 32 mm (345.6 N) if your load needs more. The 300 mm stroke is the maximum standard stroke for this bore, so no non-standard surcharge applies. Choose the MGD over the single-rod MG when you need anti-rotation, equal force in both directions, a rear-mounted switch or stop flag, or two driven points on one cylinder; if you need an adjustable air cushion or a 50/63 mm bore, step up to the MGCD. Mounting is FA flange or LB foot, with I and Y rod knuckles available (no SDB/CB pivot on the double-rod). This unit has no magnet, so position sensing is not possible; order the S version if you plan to fit CMSG, DMSG or EMSG switches. Ports are 1/8" on every MGD bore, and PT threading is standard (G or NPT on request). For very long strokes, support the rod to limit side-load wear.
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 MGD20X300 FAQ
Because a rod occupies both piston faces, force is equal in both directions: 131.9 N at 0.5 MPa and 184.7 N at 0.7 MPa, with a theoretical maximum of 26.9 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 medium is air filtered to 40 um. The port is 1/8" and the rod thread is M8x1.25 at both ends.
The MGD20X300 has a rod exiting both covers, so it resists rotation and side load, gives equal force both ways, and offers a free rear rod end for a stop flag or second load; the single-rod MG has a larger push than pull and no rear rod. This model has fixed anti-impact bumper pads only, not the adjustable cushion of the MGCD. It ships without a magnet, so no sensor can be mounted; choose the S version to fit CMSG, DMSG or EMSG switches. It will not hold a load on air loss, so add an external rod lock or pilot check valve for held loads.
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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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