Airtac MGD Double Rod Mini Cylinder MGD20X125
The AirTAC Airtac MGD Double Rod Mini Cylinder MGD20X125 is a genuine double acting, double rod JIS-standard round-body mini air cylinder with a Ø20mm bore and 125mm 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
- Stroke125 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 MGD20X125
The AirTAC MGD20X125 is a double acting, double rod JIS mini cylinder with a 20 mm bore and 125 mm stroke. A piston rod exits both the front and rear 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, and the through-rod naturally resists rotation and side load while keeping stroke-end position repeatable.
Construction follows the JIS round-body mini format: a SUS304 stainless barrel with hard-chrome plated carbon steel rods, riveted covers, a two-way lubricant-storing piston seal and a fixed anti-impact bumper pad that softens the stroke ends. It 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. Ports are 1/8" and the thread is PT. At a realistic working load, plan on roughly 8 kg vertical (about 0.6 of the 131.9 N force). Note that the cylinder does not hold its load on air loss, so use an external rod lock or pilot check valve where a held position is needed.
Airtac MGD Double Rod Mini Cylinder MGD20X125 Technical Specifications
| Model | Airtac MGD Double Rod Mini Cylinder MGD20X125 |
|---|---|
| Series | MGD JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 125 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 MGD20X125
| MGD | JIS round-body mini cylinder (double-rod). |
|---|---|
| 20 | Bore size in mm. |
| ×125 | 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 MGD20X125 Is Used
Anti-rotation slide
The through-rod on the MGD20X125 resists rotation, keeping a small gripper or tool plate oriented through the full 125 mm stroke without external guides.
Twin-load push
With 131.9 N available at each rod end at 0.5 MPa, one cylinder drives two light fixtures or parts simultaneously with identical force in extend and retract.
Rear switch or stop flag
The back rod end carries a stop block or a magnet-triggered flag position; add the S option to mount CMSG, DMSG or EMSG switches for end-of-stroke signalling.
Is the Airtac MGD Double Rod Mini Cylinder MGD20X125 the Right Cylinder?
The 20 mm bore is the smallest MGD, delivering 131.9 N each way at 0.5 MPa; if you need more force step up to the MGD25 (206.1 N) or MGD32 (345.6 N), and for bores above 40 mm or an adjustable air cushion choose the MGCD instead. Pick the MGD over the single-rod MG when you need anti-rotation guidance, equal force in both directions, a rear rod end for a stop or switch flag, or two loads driven at once. This 125 mm stroke is within the 300 mm maximum standard stroke for bore 20. 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 body. The magnet is optional (S code) and only with it can CMSG, DMSG or EMSG sensors be fitted. On long strokes, support the load externally to limit side load on the rods.
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 MGD20X125 FAQ
Output is equal in both directions because the rod-side area works both ways: 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, on air filtered to 40 um. Ports are 1/8" on all MGD bores, and the maximum standard stroke for bore 20 is 300 mm.
The MGD has a rod exiting both covers with the same M8x1.25 thread at each end, so force is identical extending and retracting, the through-rod resists rotation and side load, and the rear rod can carry a stop flag or drive a second load. The MG has one rod and a larger push than pull force. Both use fixed anti-impact bumper pads rather than an adjustable cushion (that is the MGCD). Sensors CMSG, DMSG and EMSG require the magnet option, the S code, which this non-S model does not include.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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