Airtac MGD Double Rod Mini Cylinder MGD20X250S
The AirTAC Airtac MGD Double Rod Mini Cylinder MGD20X250S is a genuine double acting, double rod JIS-standard round-body mini air cylinder with a Ø20mm 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.
- BoreØ20 mm
- Stroke250 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 MGD20X250S
The AirTAC MGD20X250S is a double acting, double rod JIS mini cylinder with a 20 mm bore and a 250 mm stroke. A piston rod exits both the front and back covers with the same M8x1.25 male thread at each end, so the two rod ends move together and the output force is EQUAL in both directions: 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. Because both sides of the piston see the rod-side area, there is no separate push and pull figure to juggle when you size the load. The through-rod resists rotation and side load, and the free back rod end can carry a stop or switch flag or drive a second load.
Construction follows the JIS round-body mini format: a riveted SUS304 stainless barrel with a hard-chrome steel rod, suited to damp and washdown-prone areas. A fixed anti-impact bumper pad softens the stroke ends; it is not an adjustable air cushion. Operating pressure is 0.15-1.0 MPa (22-145 psi) with proof pressure of 1.5 MPa (215 psi), temperature range -20 to +70 C, and speed 30-800 mm/s. The fitted magnet (the S in the code) accepts CMSG, DMSG or EMSG switches, and the 1/8" port takes PT thread. As a working rule, keep the vertical load to about 0.6 of the push force, roughly 8 kg for this bore.
Airtac MGD Double Rod Mini Cylinder MGD20X250S Technical Specifications
| Model | Airtac MGD Double Rod Mini Cylinder MGD20X250S |
|---|---|
| Series | MGD JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 250 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 MGD20X250S
| MGD | JIS round-body mini cylinder (double-rod). |
|---|---|
| 20 | 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 MGD20X250S Is Used
Anti-rotation linear slide
The through-rod resists piston rotation, keeping a 250 mm stroke slide or gate square without external guides in light pick-and-place fixtures.
Twin-load pusher
With about 131.9 N available at each rod end simultaneously, one cylinder can eject or transfer two small parts or chutes at once on packaging lines.
Rear-mounted switch flag
The back rod end carries a stop or switch flag, letting CMSG/DMSG/EMSG sensors on the magnet report stroke-end position without extra hardware.
Is the Airtac MGD Double Rod Mini Cylinder MGD20X250S the Right Cylinder?
At 131.9 N per direction at 0.5 MPa, the MGD20X250S is the smallest force class in the MGD range (bores 20, 25, 32, 40). If you need more equal both-way force, step up to the MGD25 (about 206 N) or MGD32 (about 346 N); the MGD40 delivers about 528 N. For bores of 50 mm or 63 mm, or if you need an adjustable variable cushion instead of the fixed bumper pad, move to the MGCD double-rod series. If a single rod is enough, the single-rod MG series gives a higher push force from the same bore. The 250 mm stroke sits within the 300 mm maximum standard stroke for bore 20, so no non-standard surcharge applies. Choose LB foot or FA flange mounting plus I or Y rod knuckles (no SDB/CB pivot is offered on the double-rod body), and keep the -S magnet if you plan to mount CMSG/DMSG/EMSG switches. On long strokes, support the load to respect the through-rod's side-load limits, and remember the cylinder will drift on air loss, so 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 MGD20X250S FAQ
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 1.5 MPa (215 psi), temperature -20 to +70 C, speed 30-800 mm/s, and the air supply should be filtered to 40 um. The port is 1/8" PT.
The MGD has a rod exiting both covers, so both directions work on the rod-side area and deliver identical force, while the single-rod MG has a larger push than pull. The through-rod also resists rotation and lets the rear end carry a flag or second load. The fitted magnet on this -S model accepts CMSG, DMSG or EMSG switches. Note the bumper pad only softens stroke ends; for a held load use an external rod lock or pilot check valve.
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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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